$120+ Cheap flights from Pennsylvania to Seattle (SEA)
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 6/9. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — SEA
May 29 — Jun 51
Round-trip
1 adult, Economy
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Cheapest flights from Pennsylvania to SeattleExplore the most affordable flight options available from Pennsylvania to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 29, 2026.
Explore the most affordable flight options available from Pennsylvania to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 29, 2026.
This American Airlines deal was found by Cheapflights users on 4/29. 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 5/295:11 pm
PIT
- SEA
1 stop8h 47m
American Airlines
Tue 6/99:35 pm
SEA
- PIT
1 stop8h 19m
American Airlines
Deal found 4/29![American Airlines logo]()
$239
This Trip.com deal was found by Cheapflights users on 4/26. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/49:12 am
IAD
- SEA
1 stop28h 24m
Frontier
Wed 6/108:12 pm
SEA
- IAD
1 stop9h 13m
Frontier
Deal found 4/26![Frontier logo]()
$259
This American Airlines deal was found by Cheapflights users on 4/27. 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.
Wed 6/107:08 pm
MDT
- SEA
1 stop8h 33m
American Airlines
Tue 6/1610:35 pm
SEA
- MDT
1 stop8h 33m
American Airlines
Deal found 4/27![American Airlines logo]()
$261
This Orbitz deal was found by Cheapflights users on 4/25. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/319:12 am
IAD
- SEA
1 stop28h 24m
Frontier
Fri 6/58:20 pm
SEA
- IAD
1 stop8h 52m
Frontier
Deal found 4/25![Frontier logo]()
$261
This Orbitz deal was found by Cheapflights users on 4/25. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/317:00 am
DCA
- SEA
1 stop30h 06m
Frontier
Fri 6/53:19 pm
SEA
- DCA
1 stop27h 39m
Frontier
Deal found 4/25![Frontier logo]()
$261
This Super.com deal was found by Cheapflights users on 4/26. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/89:12 am
IAD
- SEA
1 stop28h 23m
Frontier
Mon 6/158:12 pm
SEA
- IAD
1 stop9h 13m
Frontier
Deal found 4/26![Frontier logo]()
$262
This Booking.com deal was found by Cheapflights users on 4/25. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/267:00 am
DCA
- SEA
1 stop30h 06m
Frontier
Fri 5/293:19 pm
SEA
- DCA
1 stop18h 40m
Frontier
Deal found 4/25![Frontier logo]()
$263
This Orbitz deal was found by Cheapflights users on 4/25. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/59:12 am
IAD
- SEA
1 stop28h 24m
Multiple Airlines
Tue 6/911:30 pm
SEA
- IAD
Nonstop5h 04m
Multiple Airlines
Deal found 4/25![Multiple Airlines logo]()
$264
This Alaska Airlines deal was found by Cheapflights users on 4/27. 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.
Tue 9/159:00 am
IAD
- SEA
Nonstop5h 39m
Alaska Airlines
Sat 9/199:32 pm
SEA
- IAD
Nonstop5h 08m
Alaska Airlines
Deal found 4/27![Alaska Airlines logo]()
$265
This United Airlines deal was found by Cheapflights users on 4/25. 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 9/152:00 pm
DCA
- SEA
1 stop7h 59m
United Airlines
Tue 9/2210:47 pm
SEA
- DCA
1 stop7h 28m
United Airlines
Deal found 4/25![United Airlines logo]()
$265
This Super.com deal was found by Cheapflights users on 4/25. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/306:00 pm
DCA
- SEA
1 stop19h 06m
Frontier
Fri 6/57:50 pm
SEA
- DCA
1 stop14h 09m
Frontier
Deal found 4/25![Frontier logo]()
$267
This Expedia deal was found by Cheapflights users on 4/26. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/79:12 am
IAD
- SEA
1 stop28h 24m
Multiple Airlines
Wed 7/86:21 am
SEA
- IAD
1 stop9h 24m
Multiple Airlines
Deal found 4/26![Multiple Airlines logo]()
$268
Best flights from Pennsylvania to SeattleDiscover carefully curated flight deals from Pennsylvania to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 29, 2026.
Discover carefully curated flight deals from Pennsylvania to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 29, 2026.
This Southwest deal was found by Cheapflights users on 4/27. 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.
Mon 7/276:40 pm
PIT
- SEA
1 stop7h 25m
Southwest
Tue 8/411:05 pm
SEA
- PIT
1 stop9h 15m
Southwest
Deal found 4/27![Southwest logo]()
$279
This Delta deal was found by Cheapflights users on 4/25. 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.
Wed 6/37:15 am
EWR
- SEA
1 stop11h 06m
Delta
Wed 6/1011:25 am
SEA
- EWR
1 stop9h 04m
Delta
Deal found 4/25![Delta logo]()
$297
This United Airlines deal was found by Cheapflights users on 4/28. 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 5/298:30 pm
EWR
- SEA
Nonstop6h 14m
United Airlines
Fri 6/511:00 pm
SEA
- EWR
Nonstop5h 18m
United Airlines
Deal found 4/28![United Airlines logo]()
$301
This Alaska Airlines deal was found by Cheapflights users on 4/25. 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 7/147:49 pm
IAD
- SEA
1 stop16h 30m
Alaska Airlines
Tue 7/219:04 pm
SEA
- IAD
1 stop18h 41m
Alaska Airlines
Deal found 4/25![Alaska Airlines logo]()
$305
This JetBlue deal was found by Cheapflights users on 4/27. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/35:30 pm
JFK
- SEA
Nonstop6h 12m
JetBlue
Mon 10/1210:15 pm
SEA
- JFK
Nonstop5h 22m
JetBlue
Deal found 4/27![JetBlue logo]()
$316
This Delta deal was found by Cheapflights users on 4/25. 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.
Tue 10/137:05 am
JFK
- SEA
Nonstop6h 30m
Delta
Sat 10/173:30 pm
SEA
- JFK
Nonstop5h 25m
Delta
Deal found 4/25![Delta logo]()
$297
This Alaska Airlines deal was found by Cheapflights users on 4/25. 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 10/264:45 pm
JFK
- SEA
Nonstop6h 30m
Alaska Airlines
Fri 11/610:41 pm
SEA
- JFK
Nonstop5h 24m
Alaska Airlines
Deal found 4/25![Alaska Airlines logo]()
$335
This United Airlines deal was found by Cheapflights users on 4/28. 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 7/115:41 pm
ABE
- SEA
1 stop9h 33m
United Airlines
Tue 7/1411:52 pm
SEA
- ABE
1 stop6h 46m
United Airlines
Deal found 4/28![United Airlines logo]()
$349
This Southwest deal was found by Cheapflights users on 4/27. 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.
Mon 6/228:30 am
LGA
- SEA
1 stop11h 55m
Southwest
Wed 7/158:50 am
SEA
- LGA
1 stop10h 05m
Southwest
Deal found 4/27![Southwest logo]()
$357
This Delta deal was found by Cheapflights users on 4/28. 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 6/196:45 pm
PHL
- SEA
Nonstop6h 14m
Delta
Mon 6/229:25 am
SEA
- PHL
Nonstop5h 10m
Delta
Deal found 4/28![Delta logo]()
$329
This Alaska Airlines deal was found by Cheapflights users on 4/25. 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 5/267:00 am
JFK
- SEA
Nonstop6h 12m
Alaska Airlines
Sat 5/307:05 am
SEA
- JFK
1 stop9h 23m
Alaska Airlines
Deal found 4/25![Alaska Airlines logo]()
$336
This United Airlines deal was found by Cheapflights users on 4/28. 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 5/276:00 am
PHL
- SEA
1 stop9h 34m
United Airlines
Tue 6/210:40 pm
SEA
- PHL
1 stop7h 59m
United Airlines
Deal found 4/28![United Airlines logo]()
$349
This Delta deal was found by Cheapflights users on 4/28. 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 6/56:45 pm
PHL
- SEA
Nonstop5h 50m
Delta
Sun 6/149:25 am
SEA
- PHL
Nonstop5h 10m
Delta
Deal found 4/28![Delta logo]()
$329
This Southwest deal was found by Cheapflights users on 4/24. 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.
Sat 7/1811:40 am
DCA
- SEA
2 stops15h 30m
Southwest
Tue 7/2110:45 pm
SEA
- DCA
1 stop6h 40m
Southwest
Deal found 4/24![Southwest logo]()
$377
This Alaska Airlines deal was found by Cheapflights users on 4/27. 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.
Fri 9/44:05 pm
JFK
- SEA
Nonstop6h 20m
Alaska Airlines
Sat 9/128:35 am
SEA
- JFK
1 stop7h 52m
Alaska Airlines
Deal found 4/27![Alaska Airlines logo]()
$345
This Delta deal was found by Cheapflights users on 4/26. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/246:12 am
PHL
- SEA
1 stop7h 53m
Delta
Mon 6/19:20 pm
SEA
- PHL
Nonstop5h 15m
Delta
Deal found 4/26![Delta logo]()
$339
This United Airlines deal was found by Cheapflights users on 4/26. 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.
Mon 5/185:58 pm
PIT
- SEA
1 stop9h 01m
United Airlines
Thu 5/2811:20 pm
SEA
- PIT
1 stop7h 20m
United Airlines
Deal found 4/26![United Airlines logo]()
$374
This Southwest deal was found by Cheapflights users on 4/27. 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.
Fri 5/86:35 pm
PIT
- SEA
1 stop7h 55m
Southwest
Tue 5/1211:40 am
SEA
- PIT
1 stop8h 45m
Southwest
Deal found 4/27![Southwest logo]()
$381
This Alaska Airlines deal was found by Cheapflights users on 4/26. 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 5/125:33 pm
EWR
- SEA
1 stop7h 53m
Alaska Airlines
Wed 5/133:30 pm
SEA
- EWR
Nonstop5h 29m
Alaska Airlines
Deal found 4/26![Alaska Airlines logo]()
$362
This Delta deal was found by Cheapflights users on 4/26. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/16:45 pm
PHL
- SEA
Nonstop6h 14m
Delta
Thu 7/96:00 am
SEA
- PHL
1 stop9h 12m
Delta
Deal found 4/26![Delta logo]()
$339
This Southwest deal was found by Cheapflights users on 4/25. 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 7/276:55 pm
PHL
- SEA
1 stop8h 30m
Southwest
Wed 8/511:05 pm
SEA
- PHL
2 stops11h 10m
Southwest
Deal found 4/25![Southwest logo]()
$384
This United Airlines deal was found by Cheapflights users on 4/28. 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 9/307:30 pm
SCE
- SEA
1 stop7h 44m
United Airlines
Wed 10/711:04 pm
SEA
- SCE
1 stop7h 42m
United Airlines
Deal found 4/28![United Airlines logo]()
$389
This Alaska Airlines deal was found by Cheapflights users on 4/28. 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 5/277:16 pm
PHL
- SEA
Nonstop6h 12m
Alaska Airlines
Tue 6/29:59 am
SEA
- PHL
Nonstop5h 17m
Alaska Airlines
Deal found 4/28![Alaska Airlines logo]()
$373
This Delta deal was found by Cheapflights users on 4/28. 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 5/286:45 pm
PHL
- SEA
1 stop8h 27m
Delta
Mon 6/111:59 pm
SEA
- PHL
1 stop7h 31m
Delta
Deal found 4/28![Delta logo]()
$349
This Southwest deal was found by Cheapflights users on 4/26. 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.
Tue 6/91:15 pm
PIT
- SEA
1 stop10h 10m
Southwest
Mon 6/1511:05 pm
SEA
- PIT
2 stops10h 00m
Southwest
Deal found 4/26![Southwest logo]()
$386
This United Airlines deal was found by Cheapflights users on 4/28. 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 5/167:11 pm
PIT
- SEA
1 stop9h 01m
United Airlines
Sat 5/233:30 pm
SEA
- PIT
1 stop10h 49m
United Airlines
Deal found 4/28![United Airlines logo]()
$389
This Alaska Airlines deal was found by Cheapflights users on 4/28. 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.
Sun 5/247:00 am
JFK
- SEA
Nonstop6h 12m
Alaska Airlines
Sat 5/307:05 am
SEA
- JFK
1 stop9h 23m
Alaska Airlines
Deal found 4/28![Alaska Airlines logo]()
$376
This United Airlines deal was found by Cheapflights users on 4/24. 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.
Sun 6/219:00 am
IAD
- SEA
Nonstop5h 51m
United Airlines
Thu 6/2511:20 pm
SEA
- IAD
Nonstop5h 02m
United Airlines
Deal found 4/24![United Airlines logo]()
$390
This Southwest deal was found by Cheapflights users on 4/28. 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 8/216:10 am
LGA
- SEA
2 stops13h 55m
Southwest
Mon 8/315:15 am
SEA
- LGA
1 stop7h 40m
Southwest
Deal found 4/28![Southwest logo]()
$398
This Delta deal was found by Cheapflights users on 4/27. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/87:05 am
PHL
- SEA
Nonstop5h 56m
Delta
Tue 7/219:20 pm
SEA
- PHL
Nonstop5h 09m
Delta
Deal found 4/27![Delta logo]()
$363
Last-minute flights from Pennsylvania to SeattleDiscover last-minute flight deals from Pennsylvania to Seattle. Data last updated April 29, 2026 and is based on user searches.
Discover last-minute flight deals from Pennsylvania to Seattle. Data last updated April 29, 2026 and is based on user searches.
This Trip.com deal was found by Cheapflights users on 4/25. 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.
Mon 5/47:59 am
DCA
- SEA
1 stop28h 50m
Frontier
Fri 5/87:50 pm
SEA
- DCA
1 stop23h 08m
Frontier
Deal found 4/25![Frontier logo]()
$269
This Super.com deal was found by Cheapflights users on 4/27. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/61:59 pm
DCA
- SEA
1 stop22h 50m
Frontier
Fri 5/87:50 pm
SEA
- DCA
1 stop14h 09m
Frontier
Deal found 4/27![Frontier logo]()
$268
This Booking.com deal was found by Cheapflights users on 4/27. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/61:59 pm
DCA
- SEA
1 stop22h 50m
Frontier
Thu 5/77:50 pm
SEA
- DCA
1 stop23h 08m
Frontier
Deal found 4/27![Frontier logo]()
$275
This Super.com deal was found by Cheapflights users on 4/28. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/91:59 pm
DCA
- SEA
1 stop22h 50m
Frontier
Wed 5/137:50 pm
SEA
- DCA
1 stop14h 09m
Frontier
Deal found 4/28![Frontier logo]()
$274
This Trip.com deal was found by Cheapflights users on 4/26. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/207:00 am
DCA
- SEA
1 stop30h 06m
Frontier
Sat 5/237:50 pm
SEA
- DCA
1 stop14h 09m
Frontier
Deal found 4/26![Frontier logo]()
$271
This Frontier deal was found by Cheapflights users on 4/27. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/247:00 am
DCA
- SEA
1 stop10h 01m
Frontier
Wed 6/247:41 pm
SEA
- DCA
1 stop14h 16m
Frontier
Deal found 4/27![Frontier logo]()
$270
This Booking.com deal was found by Cheapflights users on 4/25. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/267:00 am
DCA
- SEA
1 stop30h 06m
Frontier
Fri 5/293:19 pm
SEA
- DCA
1 stop18h 40m
Frontier
Deal found 4/25![Frontier logo]()
$263
This American Airlines deal was found by Cheapflights users on 4/27. 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.
Wed 5/275:22 pm
DCA
- SEA
1 stop9h 54m
American Airlines
Wed 6/35:15 am
SEA
- DCA
1 stop8h 44m
American Airlines
Deal found 4/27![American Airlines logo]()
$265
This American Airlines deal was found by Cheapflights users on 4/29. 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 5/295:11 pm
PIT
- SEA
1 stop8h 47m
American Airlines
Tue 6/99:35 pm
SEA
- PIT
1 stop8h 19m
American Airlines
Deal found 4/29![American Airlines logo]()
$239
This Super.com deal was found by Cheapflights users on 4/25. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/306:00 pm
DCA
- SEA
1 stop19h 06m
Frontier
Fri 6/57:50 pm
SEA
- DCA
1 stop14h 09m
Frontier
Deal found 4/25![Frontier logo]()
$267
This Orbitz deal was found by Cheapflights users on 4/25. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/319:12 am
IAD
- SEA
1 stop28h 24m
Frontier
Fri 6/58:20 pm
SEA
- IAD
1 stop8h 52m
Frontier
Deal found 4/25![Frontier logo]()
$261
This Orbitz deal was found by Cheapflights users on 4/25. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/317:00 am
DCA
- SEA
1 stop30h 06m
Frontier
Fri 6/53:19 pm
SEA
- DCA
1 stop27h 39m
Frontier
Deal found 4/25![Frontier logo]()
$261
One-way flights from Pennsylvania to SeattleSearch for one-way flight options from Pennsylvania to Seattle. Find affordable one-way fares based on user searches. Data last updated April 29, 2026.
Search for one-way flight options from Pennsylvania to Seattle. Find affordable one-way fares based on user searches. Data last updated April 29, 2026.
This American Airlines deal was found by Cheapflights users on 4/28. 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.
Tue 6/95:01 am
PIT
- SEA
1 stop7h 49m
American Airlines
Deal found 4/28![American Airlines logo]()
$120
This Delta deal was found by Cheapflights users on 4/29. 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 6/26:00 am
EWR
- SEA
1 stop8h 05m
Delta
Deal found 4/29![Delta logo]()
$144
This Kiwi.com deal was found by Cheapflights users on 4/25. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/181:22 pm
PIT
- SEA
2 stops32h 13m
Multiple Airlines
Deal found 4/25![Multiple Airlines logo]()
$144
This Super.com deal was found by Cheapflights users on 4/26. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/247:00 am
DCA
- SEA
1 stop10h 01m
Frontier
Deal found 4/26![Frontier logo]()
$144
This Frontier deal was found by Cheapflights users on 4/25. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/277:00 am
DCA
- SEA
1 stop10h 19m
Frontier
Deal found 4/25![Frontier logo]()
$145
This Kiwi.com deal was found by Cheapflights users on 4/25. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/26:00 pm
DCA
- SEA
2 stops27h 35m
Frontier
Deal found 4/25![Frontier logo]()
$146
This Cheapflightsfares deal was found by Cheapflights users on 4/28. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/265:30 pm
JFK
- SEA
Nonstop6h 12m
JetBlue
Deal found 4/28![JetBlue logo]()
$148
This American Airlines deal was found by Cheapflights users on 4/24. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/215:25 pm
LGA
- SEA
1 stop9h 10m
American Airlines
Deal found 4/24![American Airlines logo]()
$148
This Trip.com deal was found by Cheapflights users on 4/24. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/17:00 am
DCA
- SEA
1 stop10h 01m
Frontier
Deal found 4/24![Frontier logo]()
$148
This Alaska Airlines deal was found by Cheapflights users on 4/24. 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.
Wed 6/35:29 pm
JFK
- SEA
Nonstop6h 26m
Alaska Airlines
Deal found 4/24![Alaska Airlines logo]()
$149
This Delta deal was found by Cheapflights users on 4/27. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/245:00 pm
MDT
- SEA
1 stop8h 48m
Delta
Deal found 4/27![Delta logo]()
$149
This Super.com deal was found by Cheapflights users on 4/26. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/319:12 am
IAD
- SEA
1 stop28h 24m
Frontier
Deal found 4/26![Frontier logo]()
$149
Find flight deals from Pennsylvania to Seattle
Keep the following information in mind while searching for Pennsylvania to Seattle flight deals. Data was last updated April 29, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $239 (American Airlines) |
One-way from | $120 (American Airlines) |
Popular in | June |
Cheapest in | January |
Average price | $414 |
Good round-trip deal | $376 or less |
Good one-way deal | $221 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Pennsylvania to Seattle 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 April 29, 2026.
Use the filters below to find and compare flights from Pennsylvania to Seattle that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
PittsburghSeattle
PIT - SEA
PITSEA
Pittsburgh
Mon 7/27
6:40 pm-11:05 pm
1 stop7h 25m
Seattle/Tacoma Intl
Tue 8/4
11:05 pm-11:20 am
1 stop9h 15m
$279
NewarkSeattle
EWR - SEA
EWRSEA
Newark
Wed 6/3
7:15 am-3:21 pm
1 stop11h 06m
Seattle/Tacoma Intl
Wed 6/10
11:25 am-11:29 pm
1 stop9h 04m
$297
New YorkSeattle
JFK - SEA
JFKSEA
New York John F Kennedy Intl
Tue 10/13
7:05 am-10:35 am
Nonstop6h 30m
Seattle/Tacoma Intl
Sat 10/17
3:30 pm-11:55 pm
Nonstop5h 25m
$297
NewarkSeattle
EWR - SEA
EWRSEA
Newark
Fri 5/29
8:30 pm-11:44 pm
Nonstop6h 14m
Seattle/Tacoma Intl
Fri 6/5
11:00 pm-7:18 am
Nonstop5h 18m
$301
Washington, D.C.Seattle
IAD - SEA
IADSEA
Washington, D.C. Dulles Intl
Tue 7/14
7:49 pm-9:19 am
1 stop16h 30m
Seattle/Tacoma Intl
Tue 7/21
9:04 pm-6:45 pm
1 stop18h 41m
$305
New YorkSeattle
JFK - SEA
JFKSEA
New York John F Kennedy Intl
Sat 10/3
5:30 pm-8:42 pm
Nonstop6h 12m
Seattle/Tacoma Intl
Mon 10/12
10:15 pm-6:37 am
Nonstop5h 22m
$316
PhiladelphiaSeattle
PHL - SEA
PHLSEA
Philadelphia
Fri 6/19
6:45 pm-9:59 pm
Nonstop6h 14m
Seattle/Tacoma Intl
Mon 6/22
9:25 am-5:35 pm
Nonstop5h 10m
$329
PhiladelphiaSeattle
PHL - SEA
PHLSEA
Philadelphia
Fri 6/5
6:45 pm-9:35 pm
Nonstop5h 50m
Seattle/Tacoma Intl
Sun 6/14
9:25 am-5:35 pm
Nonstop5h 10m
$329
New YorkSeattle
JFK - SEA
JFKSEA
New York John F Kennedy Intl
Mon 10/26
4:45 pm-8:15 pm
Nonstop6h 30m
Seattle/Tacoma Intl
Fri 11/6
10:41 pm-7:05 am
Nonstop5h 24m
$335
New YorkSeattle
JFK - SEA
JFKSEA
New York John F Kennedy Intl
Tue 5/26
7:00 am-10:12 am
Nonstop6h 12m
Seattle/Tacoma Intl
Sat 5/30
7:05 am-7:28 pm
1 stop9h 23m
$336
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Pennsylvania to Seattle
Have a flexible travel schedule? Discover the best time to fly to Seattle from Pennsylvania with our price prediction graph.
PIT-SEA
EWR-SEA
DCA-SEA
JFK-SEA
LGA-SEA
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 Pennsylvania to Seattle
USPA-SEA
PIT-SEA
EWR-SEA
DCA-SEA
JFK-SEA
How far ahead should I book a flight from Pennsylvania to Seattle?
To ensure you get the cheapest price possible for a flight from Pennsylvania to Seattle, you should look to book at least 70 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
What is the cheapest month to book a flight from Pennsylvania to Seattle?
Currently, November is the cheapest month in which you can book a flight from Pennsylvania to Seattle (average of $98). Flying from Pennsylvania to Seattle in May is currently the most expensive (average of $476). 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 PA to SEA?
Find hourly flight availability from Pennsylvania to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 29, 2026.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Pennsylvania to Seattle as you normally would.
Weekly flight availability from Pennsylvania to Seattle
Explore weekly flight availability from Pennsylvania to Seattle. 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 April 29, 2026.
The most flights from USPA to SEA are scheduled on a Tuesday (6 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (2 on average).
How much does it cost to fly round-trip from Pennsylvania to Seattle?
Related info for your journey
Find useful and relevant information for your journey from Pennsylvania to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Seattle?
Book flights to Seattle if you plan to visit one of these locationsSeaTac
Tacoma
Ocean Shores
Olympia
Lynnwood
Lacey
Edmonds
Leavenworth
Snoqualmie
Tumwater
Tukwila
Puyallup
Kent
Renton
Kirkland
Ellensburg
Fife
Lakewood
Issaquah
Shoreline
Browse thousands of different options on Cheapflights for your next trip
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Alternative routes for Pennsylvania to Seattle
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Complete your trip
Complete your trip to Seattle by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Pennsylvania to Seattle by cabin class
Find flights from Pennsylvania to Seattle, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Pennsylvania and Seattle flights
Browse other Pennsylvania and Seattle flight options. Last updated on April 29, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Other flights to Seattle
Explore flights to Seattle departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on April 29, 2026.
Pennsylvania to Seattle flights
Consider these flights traveling from Pennsylvania to Seattle.
Top 7 airlines flying from Pennsylvania to Seattle
Discover the top 7 airlines that operate flights from Pennsylvania to Seattle. 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 April 29, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$99 | Average$225 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$119 | Average$346 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$162 | Average$380 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$176 | Average$432 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$178 | Average$505 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$197 | Average$473 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$222 | Average$438 | FlexibilityNo cancel fee | On-time69% |