$123+ Cheap flights from Seattle (SEA) to Pennsylvania
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/10. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — PHL
Aug 27 — Sep 31
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from Seattle to Pennsylvania with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Seattle to Pennsylvania
Cheapest
Best
Last-minute
One-way
Cheapest flights from Seattle to PennsylvaniaExplore the most affordable flight options available from Seattle to Pennsylvania. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 28, 2026.
Explore the most affordable flight options available from Seattle to Pennsylvania. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 28, 2026.
This American Airlines deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/1610:45 pm
SEA
- PIT
1 stop8h 43m
American Airlines
Mon 9/215:16 pm
PIT
- SEA
1 stop8h 41m
American Airlines
Deal found 7/26![American Airlines logo]()
$247
This American Airlines deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/105:30 am
SEA
- PIT
1 stop10h 21m
American Airlines
Thu 9/174:06 pm
PIT
- SEA
1 stop8h 30m
American Airlines
Deal found 7/27![American Airlines logo]()
$248
This Southwest deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/216:15 am
SEA
- PIT
1 stop13h 00m
Southwest
Mon 8/3112:50 pm
PIT
- SEA
1 stop9h 45m
Southwest
Deal found 7/24![Southwest logo]()
$252
This Southwest deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1011:05 pm
SEA
- PIT
2 stops10h 05m
Southwest
Tue 9/151:25 pm
PIT
- SEA
2 stops9h 50m
Southwest
Deal found 7/23![Southwest logo]()
$257
This Southwest deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/225:00 am
SEA
- PIT
1 stop7h 30m
Southwest
Sat 8/291:20 pm
PIT
- SEA
1 stop9h 10m
Southwest
Deal found 7/25![Southwest logo]()
$262
This Southwest deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/712:10 am
SEA
- PIT
1 stop6h 55m
Southwest
Tue 10/206:50 am
PIT
- SEA
2 stops10h 30m
Southwest
Deal found 7/23![Southwest logo]()
$267
This Southwest deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/3011:35 am
SEA
- PIT
2 stops9h 05m
Southwest
Mon 11/24:00 pm
PIT
- SEA
2 stops10h 00m
Southwest
Deal found 7/26![Southwest logo]()
$272
This Southwest deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/36:15 am
SEA
- PIT
1 stop13h 05m
Southwest
Thu 9/1012:50 pm
PIT
- SEA
2 stops13h 10m
Southwest
Deal found 7/27![Southwest logo]()
$273
This American Airlines deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/49:58 pm
SEA
- PIT
1 stop9h 22m
American Airlines
Sun 9/64:06 pm
PIT
- SEA
1 stop7h 46m
American Airlines
Deal found 7/25![American Airlines logo]()
$277
This Southwest deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/206:15 am
SEA
- PIT
1 stop13h 00m
Southwest
Wed 8/266:55 pm
PIT
- SEA
1 stop7h 40m
Southwest
Deal found 7/24![Southwest logo]()
$280
This Kiwi.com deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/217:06 pm
SEA
- DCA
1 stop14h 45m
Multiple Airlines
Sun 8/308:00 am
DCA
- SEA
Nonstop5h 54m
Multiple Airlines
Deal found 7/24![Multiple Airlines logo]()
$294
This Alaska Airlines deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/33:56 pm
SEA
- IAD
Nonstop5h 03m
Alaska Airlines
Mon 9/77:00 am
IAD
- SEA
Nonstop5h 37m
Alaska Airlines
Deal found 7/24![Alaska Airlines logo]()
$294
Best flights from Seattle to PennsylvaniaDiscover carefully curated flight deals from Seattle to Pennsylvania that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 28, 2026.
Discover carefully curated flight deals from Seattle to Pennsylvania that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 28, 2026.
This Southwest deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/911:05 pm
SEA
- PIT
1 stop8h 40m
Southwest
Wed 9/162:00 pm
PIT
- SEA
1 stop6h 55m
Southwest
Deal found 7/26![Southwest logo]()
$247
This United Airlines deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/611:11 pm
SEA
- PIT
1 stop7h 47m
United Airlines
Mon 8/106:16 pm
PIT
- SEA
1 stop7h 40m
United Airlines
Deal found 7/26![United Airlines logo]()
$277
This Alaska Airlines deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/273:56 pm
SEA
- IAD
Nonstop5h 03m
Alaska Airlines
Sat 9/57:35 pm
IAD
- SEA
1 stop16h 45m
Alaska Airlines
Deal found 7/27![Alaska Airlines logo]()
$300
This Delta deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/19:30 pm
SEA
- PHL
Nonstop5h 20m
Delta
Wed 10/77:00 am
PHL
- SEA
Nonstop5h 58m
Delta
Deal found 7/25![Delta logo]()
$339
This American Airlines deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/1511:03 am
SEA
- AVP
1 stop10h 32m
American Airlines
Wed 10/285:31 pm
AVP
- SEA
1 stop8h 39m
American Airlines
Deal found 7/25![American Airlines logo]()
$378
This JetBlue deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/51:42 pm
SEA
- JFK
1 stop13h 32m
JetBlue
Sat 9/125:29 pm
JFK
- SEA
Nonstop6h 15m
JetBlue
Deal found 7/26![JetBlue logo]()
$432
This Southwest deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/36:15 am
SEA
- PIT
1 stop13h 05m
Southwest
Thu 9/106:30 pm
PIT
- SEA
1 stop9h 15m
Southwest
Deal found 7/26![Southwest logo]()
$252
This Alaska Airlines deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/289:35 pm
SEA
- IAD
Nonstop5h 05m
Alaska Airlines
Wed 9/25:47 pm
IAD
- SEA
Nonstop5h 47m
Alaska Airlines
Deal found 7/22![Alaska Airlines logo]()
$305
This United Airlines deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/2111:00 pm
SEA
- IAD
1 stop7h 18m
United Airlines
Mon 9/285:20 pm
IAD
- SEA
1 stop8h 33m
United Airlines
Deal found 7/25![United Airlines logo]()
$309
This Alaska Airlines deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/149:35 pm
SEA
- IAD
Nonstop5h 05m
Alaska Airlines
Wed 9/167:00 am
IAD
- SEA
Nonstop5h 37m
Alaska Airlines
Deal found 7/25![Alaska Airlines logo]()
$305
This Southwest deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/36:15 am
SEA
- PIT
1 stop13h 05m
Southwest
Mon 9/77:00 am
PIT
- SEA
1 stop6h 45m
Southwest
Deal found 7/25![Southwest logo]()
$307
This Delta deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/179:30 pm
SEA
- PHL
Nonstop5h 20m
Delta
Mon 9/217:05 am
PHL
- SEA
Nonstop5h 51m
Delta
Deal found 7/25![Delta logo]()
$339
This United Airlines deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/310:40 pm
SEA
- PHL
1 stop8h 47m
United Airlines
Sun 12/139:30 am
PHL
- SEA
1 stop9h 24m
United Airlines
Deal found 7/27![United Airlines logo]()
$335
This Southwest deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/186:25 am
SEA
- PIT
1 stop11h 25m
Southwest
Sat 8/291:20 pm
PIT
- SEA
1 stop9h 10m
Southwest
Deal found 7/27![Southwest logo]()
$307
This Delta deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/89:30 pm
SEA
- PHL
Nonstop5h 20m
Delta
Tue 9/157:05 am
PHL
- SEA
Nonstop5h 51m
Delta
Deal found 7/24![Delta logo]()
$339
This Alaska Airlines deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/151:46 pm
SEA
- DCA
Nonstop5h 13m
Alaska Airlines
Tue 9/228:00 am
DCA
- SEA
Nonstop5h 54m
Alaska Airlines
Deal found 7/25![Alaska Airlines logo]()
$312
This Delta deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/159:50 pm
SEA
- PHL
Nonstop5h 13m
Delta
Fri 12/47:15 pm
PHL
- SEA
1 stop7h 44m
Delta
Deal found 7/23![Delta logo]()
$349
This United Airlines deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/1611:14 pm
SEA
- PIT
1 stop7h 23m
United Airlines
Wed 10/217:00 am
PIT
- SEA
1 stop8h 23m
United Airlines
Deal found 7/25![United Airlines logo]()
$357
This American Airlines deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/16:12 am
SEA
- ABE
1 stop8h 29m
American Airlines
Wed 11/117:36 am
ABE
- SEA
2 stops12h 18m
American Airlines
Deal found 7/23![American Airlines logo]()
$432
This Alaska Airlines deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/259:27 pm
SEA
- PHL
Nonstop5h 13m
Alaska Airlines
Sun 8/307:02 am
PHL
- SEA
Nonstop5h 51m
Alaska Airlines
Deal found 7/24![Alaska Airlines logo]()
$345
This Southwest deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1711:00 pm
SEA
- PHL
1 stop12h 30m
Southwest
Mon 9/212:05 pm
PHL
- SEA
2 stops9h 45m
Southwest
Deal found 7/25![Southwest logo]()
$346
This Delta deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/257:35 pm
SEA
- PHL
1 stop7h 06m
Delta
Tue 12/16:40 pm
PHL
- SEA
1 stop8h 31m
Delta
Deal found 7/23![Delta logo]()
$359
This United Airlines deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/165:20 pm
SEA
- PIT
2 stops13h 29m
United Airlines
Mon 9/215:48 pm
PIT
- SEA
1 stop8h 38m
United Airlines
Deal found 7/23![United Airlines logo]()
$362
This Alaska Airlines deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/167:08 am
SEA
- EWR
1 stop13h 21m
Alaska Airlines
Tue 9/225:50 pm
EWR
- SEA
Nonstop6h 02m
Alaska Airlines
Deal found 7/27![Alaska Airlines logo]()
$347
This Southwest deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/246:15 am
SEA
- PIT
2 stops12h 50m
Southwest
Sun 8/301:55 pm
PIT
- SEA
1 stop13h 55m
Southwest
Deal found 7/26![Southwest logo]()
$353
This Delta deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/227:59 pm
SEA
- PHL
1 stop7h 06m
Delta
Sun 10/257:20 am
PHL
- SEA
1 stop10h 24m
Delta
Deal found 7/23![Delta logo]()
$359
This United Airlines deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/155:20 pm
SEA
- ABE
2 stops13h 19m
United Airlines
Tue 9/296:20 am
ABE
- SEA
1 stop8h 07m
United Airlines
Deal found 7/25![United Airlines logo]()
$364
This Alaska Airlines deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2010:40 pm
SEA
- EWR
Nonstop5h 19m
Alaska Airlines
Sat 10/246:30 am
EWR
- SEA
1 stop9h 49m
Alaska Airlines
Deal found 7/26![Alaska Airlines logo]()
$352
This Southwest deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/165:20 am
SEA
- PHL
1 stop7h 40m
Southwest
Sun 9/206:20 am
PHL
- SEA
1 stop9h 55m
Southwest
Deal found 7/26![Southwest logo]()
$354
This Delta deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/165:41 pm
SEA
- EWR
1 stop9h 19m
Delta
Tue 10/203:18 pm
EWR
- SEA
1 stop9h 45m
Delta
Deal found 7/24![Delta logo]()
$362
Last-minute flights from Seattle to PennsylvaniaDiscover last-minute flight deals from Seattle to Pennsylvania. Data last updated July 28, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to Pennsylvania. Data last updated July 28, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/611:11 pm
SEA
- PIT
1 stop7h 47m
United Airlines
Mon 8/106:16 pm
PIT
- SEA
1 stop7h 40m
United Airlines
Deal found 7/26![United Airlines logo]()
$277
This Kiwi.com deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/128:13 pm
SEA
- IAD
1 stop9h 07m
Frontier
Wed 8/198:59 am
IAD
- SEA
1 stop28h 40m
Frontier
Deal found 7/23![Frontier logo]()
$299
This Southwest deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/196:25 am
SEA
- PIT
1 stop11h 25m
Southwest
Mon 8/246:30 pm
PIT
- SEA
1 stop9h 10m
Southwest
Deal found 7/24![Southwest logo]()
$267
This Southwest deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/206:15 am
SEA
- PIT
1 stop13h 00m
Southwest
Wed 8/266:55 pm
PIT
- SEA
1 stop7h 40m
Southwest
Deal found 7/24![Southwest logo]()
$280
This Trip.com deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/202:37 pm
SEA
- DCA
1 stop23h 22m
Frontier
Mon 8/247:00 am
DCA
- SEA
1 stop8h 20m
Frontier
Deal found 7/25![Frontier logo]()
$300
This Southwest deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/216:15 am
SEA
- PIT
1 stop13h 00m
Southwest
Mon 8/3112:50 pm
PIT
- SEA
1 stop9h 45m
Southwest
Deal found 7/24![Southwest logo]()
$252
This Kiwi.com deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/217:06 pm
SEA
- DCA
1 stop14h 45m
Multiple Airlines
Sun 8/308:00 am
DCA
- SEA
Nonstop5h 54m
Multiple Airlines
Deal found 7/24![Multiple Airlines logo]()
$294
This Southwest deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/225:00 am
SEA
- PIT
1 stop7h 30m
Southwest
Sat 8/291:20 pm
PIT
- SEA
1 stop9h 10m
Southwest
Deal found 7/25![Southwest logo]()
$262
This Southwest deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/2411:05 pm
SEA
- PIT
1 stop9h 15m
Southwest
Mon 8/317:30 pm
PIT
- SEA
1 stop7h 25m
Southwest
Deal found 7/25![Southwest logo]()
$296
This CheapOair deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/252:37 pm
SEA
- DCA
1 stop19h 14m
Frontier
Thu 8/277:00 am
DCA
- SEA
1 stop9h 22m
Frontier
Deal found 7/27![Frontier logo]()
$296
This Alaska Airlines deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/258:49 pm
SEA
- IAD
1 stop18h 25m
Alaska Airlines
Fri 9/115:57 pm
IAD
- SEA
Nonstop5h 47m
Alaska Airlines
Deal found 7/24![Alaska Airlines logo]()
$300
This Alaska Airlines deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/276:51 pm
SEA
- DCA
1 stop18h 09m
Alaska Airlines
Mon 8/315:00 pm
DCA
- SEA
Nonstop5h 51m
Alaska Airlines
Deal found 7/23![Alaska Airlines logo]()
$295
One-way flights from Seattle to PennsylvaniaSearch for one-way flight options from Seattle to Pennsylvania. Find affordable one-way fares based on user searches. Data last updated July 28, 2026.
Search for one-way flight options from Seattle to Pennsylvania. Find affordable one-way fares based on user searches. Data last updated July 28, 2026.
This American Airlines deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1010:45 pm
SEA
- PIT
1 stop8h 43m
American Airlines
Deal found 7/27![American Airlines logo]()
$123
This United Airlines deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/1911:00 pm
SEA
- PIT
1 stop7h 49m
United Airlines
Deal found 7/24![United Airlines logo]()
$124
This Southwest deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/216:15 am
SEA
- PIT
1 stop13h 00m
Southwest
Deal found 7/23![Southwest logo]()
$129
This Southwest deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/256:15 am
SEA
- PIT
2 stops12h 55m
Southwest
Deal found 7/26![Southwest logo]()
$135
This Southwest deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/225:00 am
SEA
- PIT
1 stop7h 30m
Southwest
Deal found 7/25![Southwest logo]()
$139
This Kiwi.com deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/257:06 pm
SEA
- PIT
2 stops37h 45m
Multiple Airlines
Deal found 7/24![Multiple Airlines logo]()
$141
This Southwest deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/2611:05 pm
SEA
- PIT
2 stops10h 30m
Southwest
Deal found 7/27![Southwest logo]()
$144
This JetBlue deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/2311:42 pm
SEA
- PIT
1 stop9h 44m
JetBlue
Deal found 7/23![JetBlue logo]()
$152
This United Airlines deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/31:00 pm
SEA
- PIT
1 stop7h 36m
United Airlines
Deal found 7/27![United Airlines logo]()
$154
This Southwest deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/65:10 am
SEA
- PIT
2 stops12h 30m
Southwest
Deal found 7/26![Southwest logo]()
$155
This Kiwi.com deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/209:29 pm
SEA
- PHL
1 stop30h 01m
Frontier
Deal found 7/27![Frontier logo]()
$165
This Southwest deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/68:05 pm
SEA
- PHL
2 stops12h 05m
Southwest
Deal found 7/23![Southwest logo]()
$166
Find flight deals from Seattle to Pennsylvania
Keep the following information in mind while searching for Seattle to Pennsylvania flight deals. Data was last updated July 28, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $247 (American Airlines) |
One-way from | $123 (American Airlines) |
Popular in | December |
Cheapest in | October |
Average price | $417 |
Good round-trip deal | $383 or less |
Good one-way deal | $209 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Seattle to Pennsylvania that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 28, 2026.
Use the filters below to find and compare flights from Seattle to Pennsylvania that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
SeattlePittsburgh
SEA - PIT
SEAPIT
Seattle/Tacoma Intl
Wed 9/9
11:05 pm-10:45 am
1 stop8h 40m
Pittsburgh
Wed 9/16
2:00 pm-5:55 pm
1 stop6h 55m
$247
SeattlePittsburgh
SEA - PIT
SEAPIT
Seattle/Tacoma Intl
Thu 9/3
6:15 am-10:20 pm
1 stop13h 05m
Pittsburgh
Thu 9/10
6:30 pm-12:45 am
1 stop9h 15m
$252
SeattlePittsburgh
SEA - PIT
SEAPIT
Seattle/Tacoma Intl
Thu 8/6
11:11 pm-9:58 am
1 stop7h 47m
Pittsburgh
Mon 8/10
6:16 pm-10:56 pm
1 stop7h 40m
$277
SeattleWashington, D.C.
SEA - IAD
SEAIAD
Seattle/Tacoma Intl
Thu 8/27
3:56 pm-11:59 pm
Nonstop5h 03m
Washington, D.C. Dulles Intl
Sat 9/5
7:35 pm-9:20 am
1 stop16h 45m
$300
SeattleWashington, D.C.
SEA - IAD
SEAIAD
Seattle/Tacoma Intl
Fri 8/28
9:35 pm-5:40 am
Nonstop5h 05m
Washington, D.C. Dulles Intl
Wed 9/2
5:47 pm-8:34 pm
Nonstop5h 47m
$305
Quickest round-trip
SeattleWashington, D.C.
SEA - IAD
SEAIAD
Seattle/Tacoma Intl
Mon 9/14
9:35 pm-5:40 am
Nonstop5h 05m
Washington, D.C. Dulles Intl
Wed 9/16
7:00 am-9:37 am
Nonstop5h 37m
$305
SeattlePittsburgh
SEA - PIT
SEAPIT
Seattle/Tacoma Intl
Thu 9/3
6:15 am-10:20 pm
1 stop13h 05m
Pittsburgh
Mon 9/7
7:00 am-10:45 am
1 stop6h 45m
$307
SeattlePittsburgh
SEA - PIT
SEAPIT
Seattle/Tacoma Intl
Tue 8/18
6:25 am-8:50 pm
1 stop11h 25m
Pittsburgh
Sat 8/29
1:20 pm-7:30 pm
1 stop9h 10m
$307
SeattleWashington, D.C.
SEA - IAD
SEAIAD
Seattle/Tacoma Intl
Mon 9/21
11:00 pm-9:18 am
1 stop7h 18m
Washington, D.C. Dulles Intl
Mon 9/28
5:20 pm-10:53 pm
1 stop8h 33m
$309
SeattleWashington, D.C.
SEA - DCA
SEADCA
Seattle/Tacoma Intl
Tue 9/15
1:46 pm-9:59 pm
Nonstop5h 13m
Washington, D.C. Reagan-National
Tue 9/22
8:00 am-10:54 am
Nonstop5h 54m
$312
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Seattle to Pennsylvania
Have a flexible travel schedule? Discover the best time to fly to Pennsylvania from Seattle with our price prediction graph.
SEA-PIT
SEA-DCA
SEA-IAD
SEA-PHL
SEA-AVP
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Seattle to Pennsylvania
SEA-USPA
SEA-PIT
SEA-DCA
SEA-IAD
SEA-PHL
What is the cheapest month to book a flight from Seattle to Pennsylvania?
Currently, October is the cheapest month in which you can book a flight from Seattle to Pennsylvania (average of $341). Flying from Seattle to Pennsylvania in December is currently the most expensive (average of $495). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from SEA to PA?
Find hourly flight availability from Seattle to Pennsylvania. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 28, 2026.
It’s typically best to fly out from Seattle to Pennsylvania in the morning. Doing so could potentially save you 36% on the flight price compared to flying in the afternoon, which is usually more expensive.
Weekly flight availability from Seattle to Pennsylvania
Explore weekly flight availability from Seattle to Pennsylvania. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated July 28, 2026.
The most flights from SEA to USPA are scheduled on a Tuesday (10 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (2 on average).
How much does it cost to fly round-trip from Seattle to Pennsylvania?
Airfare is below average for this route at the moment.
Seattle to Pennsylvania flights typically cost between $373 and $586 in August.The cheapest round-trip price found within the last 5 days was $329 on Frontier (Aug 13-Aug 16).
How far ahead should I book a flight from Seattle to Pennsylvania?
Booking 18 days in advance of your planned departure date is, on average, the best time to get cheap flights from Seattle to Pennsylvania. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
Reviews of airlines servicing Pennsylvania
Get insights into the airlines that provide service to Pennsylvania. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Pennsylvania. Reviews last updated July 28, 2026.
Read reviews from past customers who have flown Southwest,Alaska Airlines, andDelta from Seattle to Pennsylvania. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.5
Food
7.0
Overall
8.0
Comfort
8.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Entertainment
7.5
Food
7.0
Overall
8.0
Comfort
8.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Entertainment
7.5
Food
7.0
Overall
8.0
Comfort
8.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Entertainment
7.5
Food
7.0
Overall
8.0
Comfort
8.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Entertainment
7.5
Food
7.0
Overall
8.0
Comfort
8.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Entertainment
7.5
Food
7.0
Overall
8.0
Comfort
8.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Related info for your journey
Find useful and relevant information for your journey from Seattle to Pennsylvania. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Other flight options
Popular flights
Top destinations
Alternative routes for Seattle to Pennsylvania
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Pennsylvania by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Seattle to Pennsylvania by cabin class
Find flights from Seattle to Pennsylvania, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Seattle and Pennsylvania flights
Browse other Seattle and Pennsylvania flight options. Last updated on July 28, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Seattle to Pennsylvania flights
Consider these flights traveling from Seattle to Pennsylvania.
Top 7 airlines flying from Seattle to Pennsylvania
Discover the top 7 airlines that operate flights from Seattle to Pennsylvania. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 28, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$149 | Average$309 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$164 | Average$385 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$178 | Average$447 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$187 | Average$573 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$198 | Average$373 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$238 | Average$511 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$257 | Average$464 | FlexibilityNo cancel fee | On-time85% |