$85+ 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 9/9. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — PHL
Jul 14 — Jul 211
Round-trip
1 adult, Economy
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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 June 14, 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 June 14, 2026.
This American Airlines deal was found by Cheapflights users on 6/10. 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 7/165:10 am
SEA
- DCA
1 stop8h 03m
American Airlines
Tue 7/215:00 am
DCA
- SEA
1 stop7h 47m
American Airlines
Deal found 6/10![American Airlines logo]()
$295
This Alaska Airlines deal was found by Cheapflights users on 6/10. 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 8/64:01 pm
SEA
- IAD
Nonstop4h 58m
Alaska Airlines
Mon 8/247:00 am
IAD
- SEA
Nonstop5h 37m
Alaska Airlines
Deal found 6/10![Alaska Airlines logo]()
$295
This United Airlines deal was found by Cheapflights users on 6/9. 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 8/3111:00 pm
SEA
- DCA
1 stop6h 55m
United Airlines
Sat 9/55:10 pm
DCA
- SEA
1 stop8h 33m
United Airlines
Deal found 6/9![United Airlines logo]()
$296
This Flybillet deal was found by Cheapflights users on 6/13. 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 Flybillet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/64:01 pm
SEA
- IAD
Nonstop4h 58m
Alaska Airlines
Sat 8/156:14 pm
IAD
- SEA
Nonstop5h 55m
Alaska Airlines
Deal found 6/13![Alaska Airlines logo]()
$296
This Expedia deal was found by Cheapflights users on 6/11. 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.
Tue 8/187:41 pm
SEA
- DCA
1 stop14h 16m
Frontier
Mon 8/312:00 pm
DCA
- SEA
1 stop22h 48m
Frontier
Deal found 6/11![Frontier logo]()
$297
This Expedia deal was found by Cheapflights users on 6/10. 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.
Wed 7/298:13 pm
SEA
- IAD
1 stop9h 07m
Frontier
Tue 8/119:50 am
IAD
- SEA
1 stop28h 18m
Frontier
Deal found 6/10![Frontier logo]()
$297
This Booking.com deal was found by Cheapflights users on 6/12. 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.
Thu 7/166:21 am
SEA
- DCA
1 stop11h 39m
Multiple Airlines
Mon 7/277:00 am
DCA
- SEA
1 stop29h 17m
Multiple Airlines
Deal found 6/12![Multiple Airlines logo]()
$298
This Kiwi.com deal was found by Cheapflights users on 6/11. 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 7/298:13 pm
SEA
- IAD
1 stop9h 07m
Frontier
Fri 8/149:50 am
IAD
- SEA
1 stop28h 18m
Frontier
Deal found 6/11![Frontier logo]()
$298
This Alaska Airlines deal was found by Cheapflights users on 6/10. 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 8/61:46 pm
SEA
- DCA
Nonstop5h 13m
Alaska Airlines
Tue 8/188:00 am
DCA
- SEA
Nonstop5h 58m
Alaska Airlines
Deal found 6/10![Alaska Airlines logo]()
$300
This Booking.com deal was found by Cheapflights users on 6/12. 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.
Thu 7/168:53 pm
SEA
- IAD
1 stop8h 27m
Frontier
Tue 7/219:50 am
IAD
- SEA
1 stop27h 49m
Frontier
Deal found 6/12![Frontier logo]()
$300
This American Airlines deal was found by Cheapflights users on 6/12. 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 9/96:40 am
SEA
- PIT
1 stop7h 44m
American Airlines
Mon 9/144:06 pm
PIT
- SEA
1 stop8h 30m
American Airlines
Deal found 6/12![American Airlines logo]()
$300
This Super.com deal was found by Cheapflights users on 6/10. 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 7/138:53 pm
SEA
- IAD
1 stop8h 27m
Frontier
Mon 7/209:50 am
IAD
- SEA
1 stop27h 49m
Frontier
Deal found 6/10![Frontier logo]()
$301
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 June 14, 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 June 14, 2026.
This Alaska Airlines deal was found by Cheapflights users on 6/10. 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 8/277:40 am
SEA
- DCA
1 stop10h 20m
Alaska Airlines
Mon 8/315:00 pm
DCA
- SEA
Nonstop5h 51m
Alaska Airlines
Deal found 6/10![Alaska Airlines logo]()
$310
This Southwest deal was found by Cheapflights users on 6/11. 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 7/2210:45 pm
SEA
- PIT
1 stop10h 45m
Southwest
Sat 8/83:20 pm
PIT
- SEA
1 stop9h 10m
Southwest
Deal found 6/11![Southwest logo]()
$311
This United Airlines deal was found by Cheapflights users on 6/13. 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 9/2511:13 pm
SEA
- MDT
1 stop7h 38m
United Airlines
Tue 9/292:55 pm
MDT
- SEA
2 stops11h 01m
United Airlines
Deal found 6/13![United Airlines logo]()
$312
This Delta deal was found by Cheapflights users on 6/13. 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 9/93:55 pm
SEA
- JFK
Nonstop5h 19m
Delta
Wed 9/237:30 pm
JFK
- SEA
Nonstop6h 40m
Delta
Deal found 6/13![Delta logo]()
$337
This American Airlines deal was found by Cheapflights users on 6/9. 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 7/155:10 am
SEA
- AVP
1 stop8h 31m
American Airlines
Tue 7/215:27 pm
AVP
- SEA
1 stop8h 33m
American Airlines
Deal found 6/9![American Airlines logo]()
$349
This JetBlue deal was found by Cheapflights users on 6/12. 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 9/211:44 pm
SEA
- DCA
1 stop11h 46m
JetBlue
Thu 9/101:20 pm
DCA
- SEA
1 stop12h 18m
JetBlue
Deal found 6/12![JetBlue logo]()
$360
This United Airlines deal was found by Cheapflights users on 6/12. 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 7/2311:20 pm
SEA
- PIT
1 stop7h 20m
United Airlines
Wed 7/296:16 pm
PIT
- SEA
1 stop8h 00m
United Airlines
Deal found 6/12![United Airlines logo]()
$312
This Southwest deal was found by Cheapflights users on 6/10. 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 8/227:55 am
SEA
- DCA
1 stop10h 00m
Southwest
Tue 8/256:40 pm
DCA
- SEA
1 stop7h 55m
Southwest
Deal found 6/10![Southwest logo]()
$315
This Alaska Airlines deal was found by Cheapflights users on 6/13. 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 8/46:21 am
SEA
- IAD
1 stop9h 24m
Alaska Airlines
Tue 8/186:03 am
IAD
- SEA
Nonstop5h 45m
Alaska Airlines
Deal found 6/13![Alaska Airlines logo]()
$325
This Delta deal was found by Cheapflights users on 6/12. 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 9/166:00 am
SEA
- EWR
1 stop6h 59m
Delta
Sat 9/194:59 pm
EWR
- SEA
1 stop8h 03m
Delta
Deal found 6/12![Delta logo]()
$338
This Southwest deal was found by Cheapflights users on 6/11. 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 8/196:40 am
SEA
- DCA
2 stops9h 30m
Southwest
Wed 8/264:40 pm
DCA
- SEA
1 stop9h 45m
Southwest
Deal found 6/11![Southwest logo]()
$320
This United Airlines deal was found by Cheapflights users on 6/10. 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 9/297:00 am
SEA
- EWR
Nonstop5h 22m
United Airlines
Sat 10/37:25 pm
EWR
- SEA
Nonstop6h 11m
United Airlines
Deal found 6/10![United Airlines logo]()
$325
This Alaska Airlines deal was found by Cheapflights users on 6/9. 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 7/234:01 pm
SEA
- IAD
Nonstop4h 58m
Alaska Airlines
Sun 7/266:03 am
IAD
- SEA
Nonstop5h 45m
Alaska Airlines
Deal found 6/9![Alaska Airlines logo]()
$335
This Delta deal was found by Cheapflights users on 6/8. 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 8/129:30 pm
SEA
- PHL
Nonstop5h 20m
Delta
Tue 8/183:58 pm
PHL
- SEA
1 stop10h 59m
Delta
Deal found 6/8![Delta logo]()
$339
This American Airlines deal was found by Cheapflights users on 6/12. 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 8/125:50 am
SEA
- AVP
1 stop9h 13m
American Airlines
Wed 8/196:34 pm
AVP
- SEA
1 stop8h 25m
American Airlines
Deal found 6/12![American Airlines logo]()
$377
This Southwest deal was found by Cheapflights users on 6/8. 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 7/1410:45 pm
SEA
- DCA
1 stop6h 40m
Southwest
Wed 7/224:55 pm
DCA
- SEA
2 stops10h 50m
Southwest
Deal found 6/8![Southwest logo]()
$320
This United Airlines deal was found by Cheapflights users on 6/10. 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 6/175:00 am
SEA
- PIT
1 stop8h 27m
United Airlines
Fri 6/192:13 pm
PIT
- SEA
1 stop7h 52m
United Airlines
Deal found 6/10![United Airlines logo]()
$327
This Alaska Airlines deal was found by Cheapflights users on 6/9. 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 8/1811:00 pm
SEA
- PHL
1 stop13h 45m
Alaska Airlines
Tue 8/256:59 pm
PHL
- SEA
Nonstop5h 52m
Alaska Airlines
Deal found 6/9![Alaska Airlines logo]()
$339
This Delta deal was found by Cheapflights users on 6/10. 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 8/259:30 pm
SEA
- PHL
Nonstop5h 20m
Delta
Thu 8/277:20 am
PHL
- SEA
1 stop10h 30m
Delta
Deal found 6/10![Delta logo]()
$339
This JetBlue deal was found by Cheapflights users on 6/8. 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.
Tue 9/110:19 pm
SEA
- JFK
Nonstop5h 20m
JetBlue
Tue 9/85:38 pm
JFK
- SEA
Nonstop6h 26m
JetBlue
Deal found 6/8![JetBlue logo]()
$412
This American Airlines deal was found by Cheapflights users on 6/10. 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 8/261:24 pm
SEA
- AVP
1 stop7h 33m
American Airlines
Mon 8/316:34 pm
AVP
- SEA
1 stop8h 25m
American Airlines
Deal found 6/10![American Airlines logo]()
$377
This Southwest deal was found by Cheapflights users on 6/8. 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 8/1711:00 pm
SEA
- DCA
1 stop10h 05m
Southwest
Wed 8/193:50 pm
DCA
- SEA
2 stops10h 45m
Southwest
Deal found 6/8![Southwest logo]()
$320
This United Airlines deal was found by Cheapflights users on 6/12. 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 8/1011:20 pm
SEA
- IAD
Nonstop5h 02m
United Airlines
Sat 8/155:33 pm
IAD
- SEA
Nonstop5h 45m
United Airlines
Deal found 6/12![United Airlines logo]()
$334
This Delta deal was found by Cheapflights users on 6/8. 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.
Mon 8/3111:10 pm
SEA
- EWR
1 stop6h 33m
Delta
Wed 9/95:00 pm
EWR
- SEA
1 stop8h 05m
Delta
Deal found 6/8![Delta logo]()
$348
This American Airlines deal was found by Cheapflights users on 6/9. 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 7/155:10 am
SEA
- AVP
1 stop8h 31m
American Airlines
Sun 7/195:27 pm
AVP
- SEA
1 stop8h 33m
American Airlines
Deal found 6/9![American Airlines logo]()
$393
This Southwest deal was found by Cheapflights users on 6/12. 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 8/76:15 am
SEA
- PIT
2 stops12h 35m
Southwest
Fri 8/146:50 am
PIT
- SEA
1 stop14h 55m
Southwest
Deal found 6/12![Southwest logo]()
$329
This Alaska Airlines deal was found by Cheapflights users on 6/8. 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 10/169:05 pm
SEA
- IAD
1 stop17h 48m
Alaska Airlines
Mon 10/199:35 am
IAD
- SEA
Nonstop5h 45m
Alaska Airlines
Deal found 6/8![Alaska Airlines logo]()
$367
This Delta deal was found by Cheapflights users on 6/12. 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 8/75:45 am
SEA
- PHL
1 stop9h 02m
Delta
Mon 8/107:00 pm
PHL
- SEA
1 stop7h 59m
Delta
Deal found 6/12![Delta logo]()
$349
This United Airlines deal was found by Cheapflights users on 6/13. 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 9/2211:00 pm
SEA
- AVP
2 stops11h 57m
United Airlines
Thu 10/13:10 pm
AVP
- SEA
1 stop8h 27m
United Airlines
Deal found 6/13![United Airlines logo]()
$354
This American Airlines deal was found by Cheapflights users on 6/10. 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 12/36:00 am
SEA
- AVP
1 stop7h 41m
American Airlines
Sun 12/136:16 pm
AVP
- SEA
1 stop8h 22m
American Airlines
Deal found 6/10![American Airlines logo]()
$393
Last-minute flights from Seattle to PennsylvaniaDiscover last-minute flight deals from Seattle to Pennsylvania. Data last updated June 14, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to Pennsylvania. Data last updated June 14, 2026 and is based on user searches.
This Southwest deal was found by Cheapflights users on 6/9. 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 7/311:10 am
SEA
- PIT
1 stop9h 45m
Southwest
Tue 7/75:30 pm
PIT
- SEA
1 stop10h 15m
Southwest
Deal found 6/9![Southwest logo]()
$301
This Super.com deal was found by Cheapflights users on 6/10. 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 7/138:53 pm
SEA
- IAD
1 stop8h 27m
Frontier
Mon 7/209:50 am
IAD
- SEA
1 stop27h 49m
Frontier
Deal found 6/10![Frontier logo]()
$301
This American Airlines deal was found by Cheapflights users on 6/10. 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 7/165:10 am
SEA
- DCA
1 stop8h 03m
American Airlines
Tue 7/215:00 am
DCA
- SEA
1 stop7h 47m
American Airlines
Deal found 6/10![American Airlines logo]()
$295
This Booking.com deal was found by Cheapflights users on 6/12. 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.
Thu 7/166:21 am
SEA
- DCA
1 stop11h 39m
Multiple Airlines
Mon 7/277:00 am
DCA
- SEA
1 stop29h 17m
Multiple Airlines
Deal found 6/12![Multiple Airlines logo]()
$298
This Booking.com deal was found by Cheapflights users on 6/12. 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.
Thu 7/168:53 pm
SEA
- IAD
1 stop8h 27m
Frontier
Tue 7/219:50 am
IAD
- SEA
1 stop27h 49m
Frontier
Deal found 6/12![Frontier logo]()
$300
This Southwest deal was found by Cheapflights users on 6/9. 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 7/1610:45 pm
SEA
- PIT
1 stop10h 45m
Southwest
Wed 7/225:30 pm
PIT
- SEA
1 stop10h 15m
Southwest
Deal found 6/9![Southwest logo]()
$305
This Expedia deal was found by Cheapflights users on 6/10. 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.
Wed 7/298:13 pm
SEA
- IAD
1 stop9h 07m
Frontier
Tue 8/119:50 am
IAD
- SEA
1 stop28h 18m
Frontier
Deal found 6/10![Frontier logo]()
$297
This Kiwi.com deal was found by Cheapflights users on 6/11. 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 7/298:13 pm
SEA
- IAD
1 stop9h 07m
Frontier
Fri 8/149:50 am
IAD
- SEA
1 stop28h 18m
Frontier
Deal found 6/11![Frontier logo]()
$298
This CheapOair deal was found by Cheapflights users on 6/10. 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.
Wed 7/291:46 pm
SEA
- DCA
Nonstop5h 13m
Alaska Airlines
Tue 8/115:00 pm
DCA
- SEA
Nonstop5h 59m
Alaska Airlines
Deal found 6/10![Alaska Airlines logo]()
$300
This Alaska Airlines deal was found by Cheapflights users on 6/11. 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 7/296:21 am
SEA
- IAD
1 stop9h 24m
Alaska Airlines
Mon 8/109:30 am
IAD
- SEA
Nonstop5h 46m
Alaska Airlines
Deal found 6/11![Alaska Airlines logo]()
$305
This Alaska Airlines deal was found by Cheapflights users on 6/11. 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 7/304:01 pm
SEA
- IAD
Nonstop4h 58m
Alaska Airlines
Mon 8/109:30 am
IAD
- SEA
Nonstop5h 46m
Alaska Airlines
Deal found 6/11![Alaska Airlines logo]()
$295
This Delta deal was found by Cheapflights users on 6/11. 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 7/307:20 am
SEA
- DCA
Nonstop5h 01m
Delta
Tue 8/44:35 pm
DCA
- SEA
Nonstop6h 06m
Delta
Deal found 6/11![Delta logo]()
$305
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 June 14, 2026.
Search for one-way flight options from Seattle to Pennsylvania. Find affordable one-way fares based on user searches. Data last updated June 14, 2026.
This Southwest deal was found by Cheapflights users on 6/10. 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 9/28:55 am
SEA
- PIT
1 stop10h 25m
Southwest
Deal found 6/10![Southwest logo]()
$85
This American Airlines deal was found by Cheapflights users on 6/10. 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 8/255:10 am
SEA
- PIT
1 stop8h 54m
American Airlines
Deal found 6/10![American Airlines logo]()
$115
This American Airlines deal was found by Cheapflights users on 6/12. 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 7/310:35 pm
SEA
- PIT
1 stop8h 39m
American Airlines
Deal found 6/12![American Airlines logo]()
$119
This Southwest deal was found by Cheapflights users on 6/10. 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 9/55:00 am
SEA
- PIT
1 stop7h 30m
Southwest
Deal found 6/10![Southwest logo]()
$126
This Southwest deal was found by Cheapflights users on 6/12. 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 7/46:45 am
SEA
- PIT
2 stops13h 00m
Southwest
Deal found 6/12![Southwest logo]()
$130
This Southwest deal was found by Cheapflights users on 6/10. 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 8/1311:00 pm
SEA
- PIT
1 stop10h 35m
Southwest
Deal found 6/10![Southwest logo]()
$132
This JetBlue deal was found by Cheapflights users on 6/13. 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 7/811:44 pm
SEA
- PIT
1 stop8h 19m
JetBlue
Deal found 6/13![JetBlue logo]()
$138
This American Airlines deal was found by Cheapflights users on 6/11. 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 9/910:45 pm
SEA
- PIT
1 stop8h 43m
American Airlines
Deal found 6/11![American Airlines logo]()
$140
This Southwest deal was found by Cheapflights users on 6/10. 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 9/811:05 pm
SEA
- PIT
1 stop9h 15m
Southwest
Deal found 6/10![Southwest logo]()
$142
This Southwest deal was found by Cheapflights users on 6/10. 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 9/411:05 pm
SEA
- PIT
1 stop8h 00m
Southwest
Deal found 6/10![Southwest logo]()
$146
This Alaska Airlines deal was found by Cheapflights users on 6/9. 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 7/31:46 pm
SEA
- DCA
Nonstop5h 13m
Alaska Airlines
Deal found 6/9![Alaska Airlines logo]()
$148
This Alaska Airlines deal was found by Cheapflights users on 6/10. 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 9/93:56 pm
SEA
- IAD
Nonstop5h 03m
Alaska Airlines
Deal found 6/10![Alaska Airlines logo]()
$148
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 June 14, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $295 (American Airlines) |
One-way from | $85 (Southwest) |
Popular in | December |
Cheapest in | October |
Average price | $462 |
Good round-trip deal | $373 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 June 14, 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
SeattleWashington, D.C.
SEA - DCA
SEADCA
Seattle/Tacoma Intl
Thu 8/27
7:40 am-9:00 pm
1 stop10h 20m
Washington, D.C. Reagan-National
Mon 8/31
5:00 pm-7:51 pm
Nonstop5h 51m
$310
SeattlePittsburgh
SEA - PIT
SEAPIT
Seattle/Tacoma Intl
Wed 7/22
10:45 pm-12:30 pm
1 stop10h 45m
Pittsburgh
Sat 8/8
3:20 pm-9:30 pm
1 stop9h 10m
$311
SeattleHarrisburg
SEA - MDT
SEAMDT
Seattle/Tacoma Intl
Fri 9/25
11:13 pm-9:51 am
1 stop7h 38m
Harrisburg
Tue 9/29
2:55 pm-10:56 pm
2 stops11h 01m
$312
SeattlePittsburgh
SEA - PIT
SEAPIT
Seattle/Tacoma Intl
Thu 7/23
11:20 pm-9:40 am
1 stop7h 20m
Pittsburgh
Wed 7/29
6:16 pm-11:16 pm
1 stop8h 00m
$312
SeattleWashington, D.C.
SEA - DCA
SEADCA
Seattle/Tacoma Intl
Sat 8/22
7:55 am-8:55 pm
1 stop10h 00m
Washington, D.C. Reagan-National
Tue 8/25
6:40 pm-11:35 pm
1 stop7h 55m
$315
SeattleWashington, D.C.
SEA - DCA
SEADCA
Seattle/Tacoma Intl
Wed 8/19
6:40 am-7:10 pm
2 stops9h 30m
Washington, D.C. Reagan-National
Wed 8/26
4:40 pm-11:25 pm
1 stop9h 45m
$320
SeattleWashington, D.C.
SEA - DCA
SEADCA
Seattle/Tacoma Intl
Tue 7/14
10:45 pm-8:25 am
1 stop6h 40m
Washington, D.C. Reagan-National
Wed 7/22
4:55 pm-12:45 am
2 stops10h 50m
$320
SeattleWashington, D.C.
SEA - DCA
SEADCA
Seattle/Tacoma Intl
Mon 8/17
11:00 pm-12:05 pm
1 stop10h 05m
Washington, D.C. Reagan-National
Wed 8/19
3:50 pm-11:35 pm
2 stops10h 45m
$320
SeattleWashington, D.C.
SEA - IAD
SEAIAD
Seattle/Tacoma Intl
Tue 8/4
6:21 am-6:45 pm
1 stop9h 24m
Washington, D.C. Dulles Intl
Tue 8/18
6:03 am-8:48 am
Nonstop5h 45m
$325
SeattleNewark
SEA - EWR
SEAEWR
Seattle/Tacoma Intl
Tue 9/29
7:00 am-3:22 pm
Nonstop5h 22m
Newark
Sat 10/3
7:25 pm-10:36 pm
Nonstop6h 11m
$325
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-EWR
SEA-AVP
SEA-DCA
SEA-IAD
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-EWR
SEA-AVP
SEA-DCA
What is the cheapest month to book a flight from Seattle to Pennsylvania?
Currently, September is the cheapest month in which you can book a flight from Seattle to Pennsylvania (average of $42). Flying from Seattle to Pennsylvania in May is currently the most expensive (average of $184). 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 June 14, 2026.
It’s typically best to fly out from Seattle to Pennsylvania in the evening. Doing so could potentially save you 42% 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 June 14, 2026.
The most flights from SEA to USPA are scheduled on a Friday (8 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (6 on average).
How much does it cost to fly round-trip from Seattle to Pennsylvania?
How far ahead should I book a flight from Seattle to Pennsylvania?
Booking 89 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 June 14, 2026.
Read reviews from past customers who have flown Alaska Airlines,Southwest, andDelta from Seattle to Pennsylvania. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Crew
8.5
Overall
7.9
Boarding
8.1
Entertainment
7.0
Comfort
7.8
Food
7.0
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Crew
8.5
Overall
7.9
Boarding
8.1
Entertainment
7.0
Comfort
7.8
Food
7.0
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Crew
8.5
Overall
7.9
Boarding
8.1
Entertainment
7.0
Comfort
7.8
Food
7.0
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Crew
8.5
Overall
7.9
Boarding
8.1
Entertainment
7.0
Comfort
7.8
Food
7.0
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Crew
8.5
Overall
7.9
Boarding
8.1
Entertainment
7.0
Comfort
7.8
Food
7.0
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Crew
8.5
Overall
7.9
Boarding
8.1
Entertainment
7.0
Comfort
7.8
Food
7.0
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
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.
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Alternative routes for Seattle to Pennsylvania
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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 June 14, 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 June 14, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$149 | Average$294 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$153 | Average$316 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$178 | Average$433 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$178 | Average$455 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$190 | Average$573 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$206 | Average$507 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$222 | Average$432 | FlexibilityNo cancel fee | On-time85% |