$76+ 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 4/29. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — SEA
Apr 9 — Apr 161
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 March 10, 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 March 10, 2026.
This Alaska Airlines deal was found by Cheapflights users on 3/8. 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.
Thu 4/27:00 am
IAD
- SEA
Nonstop5h 53m
Alaska Airlines
Tue 4/149:40 pm
SEA
- IAD
Nonstop5h 00m
Alaska Airlines
Deal found 3/8![Alaska Airlines logo]()
$198
This Kiwi.com deal was found by Cheapflights users on 3/5. 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 4/136:00 pm
DCA
- SEA
1 stop18h 27m
Frontier
Tue 4/147:12 pm
SEA
- DCA
1 stop18h 47m
Frontier
Deal found 3/5![Frontier logo]()
$198
This Southwest deal was found by Cheapflights users on 3/9. 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.
Tue 4/286:00 pm
PIT
- SEA
1 stop7h 30m
Southwest
Sat 5/211:55 pm
SEA
- PIT
1 stop7h 05m
Southwest
Deal found 3/9![Southwest logo]()
$199
This United Airlines deal was found by Cheapflights users on 3/6. 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 4/225:55 pm
IAD
- SEA
Nonstop5h 58m
United Airlines
Wed 4/2911:35 pm
SEA
- IAD
1 stop8h 53m
United Airlines
Deal found 3/6![United Airlines logo]()
$199
This American Airlines deal was found by Cheapflights users on 3/6. 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.
Sat 4/255:00 pm
DCA
- SEA
1 stop8h 47m
American Airlines
Wed 4/291:19 pm
SEA
- DCA
1 stop7h 38m
American Airlines
Deal found 3/6![American Airlines logo]()
$199
This Orbitz deal was found by Cheapflights users on 3/6. 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.
Thu 4/168:00 am
DCA
- SEA
1 stop10h 05m
Frontier
Sat 4/187:12 pm
SEA
- DCA
1 stop14h 48m
Frontier
Deal found 3/6![Frontier logo]()
$200
This Frontier deal was found by Cheapflights users on 3/9. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/256:00 pm
DCA
- SEA
1 stop18h 27m
Frontier
Sat 5/27:12 pm
SEA
- DCA
1 stop14h 48m
Frontier
Deal found 3/9![Frontier logo]()
$201
This United Airlines deal was found by Cheapflights users on 3/9. 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.
Wed 4/85:55 pm
IAD
- SEA
Nonstop5h 58m
United Airlines
Wed 4/158:00 am
SEA
- IAD
Nonstop5h 11m
United Airlines
Deal found 3/9![United Airlines logo]()
$202
This Kiwi.com deal was found by Cheapflights users on 3/6. 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.
Sun 4/56:00 pm
DCA
- SEA
1 stop20h 37m
Frontier
Fri 4/177:12 pm
SEA
- DCA
1 stop14h 48m
Frontier
Deal found 3/6![Frontier logo]()
$202
This Kiwi.com deal was found by Cheapflights users on 3/6. 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 4/211:59 pm
DCA
- SEA
1 stop22h 28m
Frontier
Tue 4/287:12 pm
SEA
- DCA
1 stop18h 47m
Frontier
Deal found 3/6![Frontier logo]()
$203
This Alaska Airlines deal was found by Cheapflights users on 3/9. 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.
Sat 4/257:10 am
IAD
- SEA
Nonstop5h 48m
Alaska Airlines
Wed 4/299:41 pm
SEA
- IAD
Nonstop5h 09m
Alaska Airlines
Deal found 3/9![Alaska Airlines logo]()
$204
This Delta deal was found by Cheapflights users on 3/8. 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.
Fri 4/34:40 pm
DCA
- SEA
Nonstop5h 54m
Delta
Wed 4/156:00 am
SEA
- DCA
1 stop9h 00m
Delta
Deal found 3/8![Delta logo]()
$204
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 March 10, 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 March 10, 2026.
This Delta deal was found by Cheapflights users on 3/6. 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 6/27:25 pm
PIT
- SEA
1 stop7h 18m
Delta
Thu 6/119:58 pm
SEA
- PIT
1 stop8h 37m
Delta
Deal found 3/6![Delta logo]()
$211
This Alaska Airlines deal was found by Cheapflights users on 3/8. 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.
Sat 4/47:00 am
IAD
- SEA
Nonstop5h 53m
Alaska Airlines
Mon 4/139:40 pm
SEA
- IAD
Nonstop5h 00m
Alaska Airlines
Deal found 3/8![Alaska Airlines logo]()
$217
This United Airlines deal was found by Cheapflights users on 3/5. 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 5/78:49 pm
EWR
- SEA
Nonstop6h 10m
United Airlines
Mon 5/117:25 am
SEA
- EWR
Nonstop5h 24m
United Airlines
Deal found 3/5![United Airlines logo]()
$239
This Southwest deal was found by Cheapflights users on 3/8. 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.
Sat 4/252:10 pm
LGA
- SEA
2 stops11h 00m
Southwest
Sat 5/211:55 pm
SEA
- LGA
1 stop8h 25m
Southwest
Deal found 3/8![Southwest logo]()
$282
This JetBlue deal was found by Cheapflights users on 3/5. 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.
Sun 8/305:39 pm
JFK
- SEA
Nonstop6h 26m
JetBlue
Thu 9/310:20 pm
SEA
- JFK
Nonstop5h 20m
JetBlue
Deal found 3/5![JetBlue logo]()
$367
This Delta deal was found by Cheapflights users on 3/6. 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 6/35:10 pm
PIT
- SEA
1 stop9h 33m
Delta
Sat 6/1311:53 pm
SEA
- PIT
1 stop7h 11m
Delta
Deal found 3/6![Delta logo]()
$211
This United Airlines deal was found by Cheapflights users on 3/6. 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 4/241:00 pm
EWR
- SEA
1 stop9h 00m
United Airlines
Tue 4/2810:55 pm
SEA
- EWR
Nonstop5h 21m
United Airlines
Deal found 3/6![United Airlines logo]()
$248
This Alaska Airlines deal was found by Cheapflights users on 3/8. 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 4/249:00 am
EWR
- SEA
Nonstop6h 11m
Alaska Airlines
Tue 5/510:09 pm
SEA
- EWR
Nonstop5h 30m
Alaska Airlines
Deal found 3/8![Alaska Airlines logo]()
$267
This United Airlines deal was found by Cheapflights users on 3/5. 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 4/84:55 pm
EWR
- SEA
1 stop9h 01m
United Airlines
Mon 4/1310:55 pm
SEA
- EWR
Nonstop5h 21m
United Airlines
Deal found 3/5![United Airlines logo]()
$248
This Southwest deal was found by Cheapflights users on 3/6. 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 4/177:25 am
LGA
- SEA
1 stop8h 40m
Southwest
Wed 4/229:20 am
SEA
- LGA
2 stops10h 25m
Southwest
Deal found 3/6![Southwest logo]()
$282
This Delta deal was found by Cheapflights users on 3/5. 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 5/134:50 pm
JFK
- SEA
Nonstop6h 17m
Delta
Tue 5/194:00 pm
SEA
- JFK
Nonstop5h 28m
Delta
Deal found 3/5![Delta logo]()
$257
This Alaska Airlines deal was found by Cheapflights users on 3/5. 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 4/167:20 am
EWR
- SEA
Nonstop6h 09m
Alaska Airlines
Mon 4/202:50 pm
SEA
- EWR
Nonstop5h 21m
Alaska Airlines
Deal found 3/5![Alaska Airlines logo]()
$268
This Southwest deal was found by Cheapflights users on 3/7. 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 5/15:55 am
IAD
- SEA
2 stops17h 10m
Southwest
Tue 5/58:25 am
SEA
- IAD
2 stops12h 15m
Southwest
Deal found 3/7![Southwest logo]()
$289
This Delta deal was found by Cheapflights users on 3/5. 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 9/66:40 pm
JFK
- SEA
Nonstop6h 36m
Delta
Wed 9/93:30 pm
SEA
- JFK
Nonstop5h 39m
Delta
Deal found 3/5![Delta logo]()
$276
This Alaska Airlines deal was found by Cheapflights users on 3/8. 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.
Wed 5/65:56 pm
EWR
- SEA
Nonstop6h 14m
Alaska Airlines
Mon 5/119:06 pm
SEA
- EWR
1 stop15h 25m
Alaska Airlines
Deal found 3/8![Alaska Airlines logo]()
$277
This United Airlines deal was found by Cheapflights users on 3/5. 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 4/67:05 pm
DCA
- SEA
1 stop8h 29m
United Airlines
Thu 4/910:35 pm
SEA
- DCA
1 stop7h 21m
United Airlines
Deal found 3/5![United Airlines logo]()
$277
This Delta deal was found by Cheapflights users on 3/8. 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.
Fri 5/297:00 am
IAD
- SEA
Nonstop5h 44m
Delta
Fri 6/54:05 pm
SEA
- IAD
Nonstop5h 08m
Delta
Deal found 3/8![Delta logo]()
$277
This United Airlines deal was found by Cheapflights users on 3/6. 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 4/51:10 pm
IAD
- SEA
1 stop8h 50m
United Airlines
Sun 4/127:05 pm
SEA
- IAD
1 stop7h 23m
United Airlines
Deal found 3/6![United Airlines logo]()
$279
This Southwest deal was found by Cheapflights users on 3/9. 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.
Tue 4/74:00 pm
PHL
- SEA
1 stop9h 30m
Southwest
Tue 4/1411:45 pm
SEA
- PHL
1 stop8h 05m
Southwest
Deal found 3/9![Southwest logo]()
$309
This Alaska Airlines deal was found by Cheapflights users on 3/9. 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 4/236:47 pm
IAD
- SEA
1 stop32h 03m
Alaska Airlines
Sat 5/23:55 pm
SEA
- IAD
Nonstop5h 14m
Alaska Airlines
Deal found 3/9![Alaska Airlines logo]()
$282
This United Airlines deal was found by Cheapflights users on 3/7. 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 3/242:30 pm
EWR
- SEA
1 stop11h 15m
United Airlines
Thu 3/2612:25 pm
SEA
- EWR
Nonstop5h 19m
United Airlines
Deal found 3/7![United Airlines logo]()
$282
This Delta deal was found by Cheapflights users on 3/7. 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 9/17:05 am
PHL
- SEA
Nonstop5h 59m
Delta
Tue 9/89:50 pm
SEA
- PHL
Nonstop5h 15m
Delta
Deal found 3/7![Delta logo]()
$289
This Southwest deal was found by Cheapflights users on 3/8. 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.
Thu 5/284:30 pm
PHL
- SEA
2 stops11h 25m
Southwest
Mon 6/19:00 pm
SEA
- PHL
2 stops10h 50m
Southwest
Deal found 3/8![Southwest logo]()
$319
This JetBlue deal was found by Cheapflights users on 3/6. 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.
Sun 5/175:20 pm
JFK
- SEA
Nonstop6h 33m
JetBlue
Tue 5/1911:59 pm
SEA
- JFK
Nonstop5h 18m
JetBlue
Deal found 3/6![JetBlue logo]()
$432
This United Airlines deal was found by Cheapflights users on 3/7. 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 5/133:08 pm
EWR
- SEA
1 stop8h 45m
United Airlines
Thu 8/136:00 pm
SEA
- EWR
1 stop8h 41m
United Airlines
Deal found 3/7![United Airlines logo]()
$285
This Alaska Airlines deal was found by Cheapflights users on 3/8. 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.
Mon 8/176:07 pm
PIT
- SEA
Nonstop5h 22m
Alaska Airlines
Wed 8/269:40 am
SEA
- PIT
Nonstop4h 37m
Alaska Airlines
Deal found 3/8![Alaska Airlines logo]()
$317
This Southwest deal was found by Cheapflights users on 3/8. 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.
Wed 5/274:00 pm
PHL
- SEA
2 stops10h 35m
Southwest
Mon 6/19:00 pm
SEA
- PHL
2 stops10h 50m
Southwest
Deal found 3/8![Southwest logo]()
$319
This Delta deal was found by Cheapflights users on 3/7. 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 5/16:59 pm
DCA
- SEA
1 stop7h 55m
Delta
Tue 5/510:40 pm
SEA
- DCA
1 stop8h 39m
Delta
Deal found 3/7![Delta logo]()
$298
This Delta deal was found by Cheapflights users on 3/8. 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.
Tue 8/256:45 am
PHL
- SEA
1 stop10h 54m
Delta
Sun 8/309:50 pm
SEA
- PHL
Nonstop5h 15m
Delta
Deal found 3/8![Delta logo]()
$299
This Southwest deal was found by Cheapflights users on 3/9. 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 4/36:25 pm
PIT
- SEA
2 stops10h 15m
Southwest
Mon 4/611:55 pm
SEA
- PIT
1 stop12h 15m
Southwest
Deal found 3/9![Southwest logo]()
$330
Last-minute flights from Pennsylvania to SeattleDiscover last-minute flight deals from Pennsylvania to Seattle. Data last updated March 10, 2026 and is based on user searches.
Discover last-minute flight deals from Pennsylvania to Seattle. Data last updated March 10, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 3/8. 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.
Fri 4/34:40 pm
DCA
- SEA
Nonstop5h 54m
Delta
Wed 4/156:00 am
SEA
- DCA
1 stop9h 00m
Delta
Deal found 3/8![Delta logo]()
$204
This Kiwi.com deal was found by Cheapflights users on 3/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/36:00 pm
DCA
- SEA
1 stop20h 37m
Frontier
Mon 4/1310:09 pm
SEA
- DCA
2 stops20h 50m
Frontier
Deal found 3/10![Frontier logo]()
$206
This Kiwi.com deal was found by Cheapflights users on 3/6. 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.
Sun 4/56:00 pm
DCA
- SEA
1 stop20h 37m
Frontier
Fri 4/177:12 pm
SEA
- DCA
1 stop14h 48m
Frontier
Deal found 3/6![Frontier logo]()
$202
This Kiwi.com deal was found by Cheapflights users on 3/6. 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.
Sun 4/56:00 pm
DCA
- SEA
1 stop20h 37m
Frontier
Thu 4/167:12 pm
SEA
- DCA
1 stop14h 48m
Frontier
Deal found 3/6![Frontier logo]()
$207
This Kiwi.com deal was found by Cheapflights users on 3/5. 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 4/136:00 pm
DCA
- SEA
1 stop18h 27m
Frontier
Tue 4/147:12 pm
SEA
- DCA
1 stop18h 47m
Frontier
Deal found 3/5![Frontier logo]()
$198
This Orbitz deal was found by Cheapflights users on 3/6. 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.
Thu 4/168:00 am
DCA
- SEA
1 stop10h 05m
Frontier
Sat 4/187:12 pm
SEA
- DCA
1 stop14h 48m
Frontier
Deal found 3/6![Frontier logo]()
$200
This Super.com deal was found by Cheapflights users on 3/9. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/168:00 am
DCA
- SEA
1 stop10h 05m
Frontier
Fri 4/177:12 pm
SEA
- DCA
1 stop14h 48m
Frontier
Deal found 3/9![Frontier logo]()
$205
This Kiwi.com deal was found by Cheapflights users on 3/7. 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 4/176:00 pm
DCA
- SEA
1 stop18h 27m
Frontier
Mon 4/204:20 pm
SEA
- DCA
1 stop17h 40m
Frontier
Deal found 3/7![Frontier logo]()
$208
This Kiwi.com deal was found by Cheapflights users on 3/6. 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 4/211:59 pm
DCA
- SEA
1 stop22h 28m
Frontier
Tue 4/287:12 pm
SEA
- DCA
1 stop18h 47m
Frontier
Deal found 3/6![Frontier logo]()
$203
This American Airlines deal was found by Cheapflights users on 3/6. 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.
Sat 4/255:00 pm
DCA
- SEA
1 stop8h 47m
American Airlines
Wed 4/291:19 pm
SEA
- DCA
1 stop7h 38m
American Airlines
Deal found 3/6![American Airlines logo]()
$199
This Frontier deal was found by Cheapflights users on 3/9. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/256:00 pm
DCA
- SEA
1 stop18h 27m
Frontier
Sat 5/27:12 pm
SEA
- DCA
1 stop14h 48m
Frontier
Deal found 3/9![Frontier logo]()
$201
This Southwest deal was found by Cheapflights users on 3/9. 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.
Tue 4/286:00 pm
PIT
- SEA
1 stop7h 30m
Southwest
Sat 5/211:55 pm
SEA
- PIT
1 stop7h 05m
Southwest
Deal found 3/9![Southwest logo]()
$199
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 March 10, 2026.
Search for one-way flight options from Pennsylvania to Seattle. Find affordable one-way fares based on user searches. Data last updated March 10, 2026.
This Trip.com deal was found by Cheapflights users on 3/6. 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 4/298:31 pm
PHL
- SEA
1 stop15h 56m
Frontier
Deal found 3/6![Frontier logo]()
$76
This Kiwi.com deal was found by Cheapflights users on 3/6. 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 4/218:36 pm
PHL
- SEA
1 stop15h 51m
Frontier
Deal found 3/6![Frontier logo]()
$81
This Kiwi.com deal was found by Cheapflights users on 3/6. 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.
Sat 5/28:41 pm
PHL
- SEA
1 stop15h 46m
Frontier
Deal found 3/6![Frontier logo]()
$82
This Trip.com deal was found by Cheapflights users on 3/6. 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.
Tue 5/58:25 pm
PHL
- SEA
1 stop16h 02m
Frontier
Deal found 3/6![Frontier logo]()
$87
This Trip.com deal was found by Cheapflights users on 3/6. 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 4/208:41 pm
PHL
- SEA
1 stop15h 46m
Frontier
Deal found 3/6![Frontier logo]()
$92
This Kiwi.com deal was found by Cheapflights users on 3/6. 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 5/68:25 pm
PHL
- SEA
1 stop21h 40m
Frontier
Deal found 3/6![Frontier logo]()
$93
This Kiwi.com deal was found by Cheapflights users on 3/8. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/18:41 pm
PHL
- SEA
1 stop15h 46m
Frontier
Deal found 3/8![Frontier logo]()
$97
This Kiwi.com deal was found by Cheapflights users on 3/6. 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.
Sun 4/58:25 pm
PHL
- SEA
1 stop18h 12m
Frontier
Deal found 3/6![Frontier logo]()
$99
This American Airlines deal was found by Cheapflights users on 3/6. 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.
Sat 9/54:55 pm
PIT
- SEA
1 stop9h 00m
American Airlines
Deal found 3/6![American Airlines logo]()
$100
This Trip.com deal was found by Cheapflights users on 3/9. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/158:41 pm
PHL
- SEA
1 stop21h 24m
Frontier
Deal found 3/9![Frontier logo]()
$103
This Southwest deal was found by Cheapflights users on 3/8. 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 4/275:00 pm
PIT
- SEA
2 stops10h 05m
Southwest
Deal found 3/8![Southwest logo]()
$105
This Southwest deal was found by Cheapflights users on 3/7. 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 5/38:15 pm
PIT
- SEA
1 stop6h 55m
Southwest
Deal found 3/7![Southwest logo]()
$106
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 March 10, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $198 (Alaska Airlines) |
One-way from | $76 (Trip.com) |
Popular in | June |
Cheapest in | October |
Average price | $357 |
Good round-trip deal | $300 or less |
Good one-way deal | $195 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 March 10, 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
Tue 6/2
7:25 pm-11:43 pm
1 stop7h 18m
Seattle/Tacoma Intl
Thu 6/11
9:58 pm-9:35 am
1 stop8h 37m
$211
PittsburghSeattle
PIT - SEA
PITSEA
Pittsburgh
Wed 6/3
5:10 pm-11:43 pm
1 stop9h 33m
Seattle/Tacoma Intl
Sat 6/13
11:53 pm-10:04 am
1 stop7h 11m
$211
Washington, D.C.Seattle
IAD - SEA
IADSEA
Washington, D.C. Dulles Intl
Sat 4/4
7:00 am-9:53 am
Nonstop5h 53m
Seattle/Tacoma Intl
Mon 4/13
9:40 pm-5:40 am
Nonstop5h 00m
$217
NewarkSeattle
EWR - SEA
EWRSEA
Newark
Thu 5/7
8:49 pm-11:59 pm
Nonstop6h 10m
Seattle/Tacoma Intl
Mon 5/11
7:25 am-3:49 pm
Nonstop5h 24m
$239
NewarkSeattle
EWR - SEA
EWRSEA
Newark
Fri 4/24
1:00 pm-7:00 pm
1 stop9h 00m
Seattle/Tacoma Intl
Tue 4/28
10:55 pm-7:16 am
Nonstop5h 21m
$248
NewarkSeattle
EWR - SEA
EWRSEA
Newark
Wed 4/8
4:55 pm-10:56 pm
1 stop9h 01m
Seattle/Tacoma Intl
Mon 4/13
10:55 pm-7:16 am
Nonstop5h 21m
$248
New YorkSeattle
JFK - SEA
JFKSEA
New York John F Kennedy Intl
Wed 5/13
4:50 pm-8:07 pm
Nonstop6h 17m
Seattle/Tacoma Intl
Tue 5/19
4:00 pm-12:28 am
Nonstop5h 28m
$257
NewarkSeattle
EWR - SEA
EWRSEA
Newark
Fri 4/24
9:00 am-12:11 pm
Nonstop6h 11m
Seattle/Tacoma Intl
Tue 5/5
10:09 pm-6:39 am
Nonstop5h 30m
$267
NewarkSeattle
EWR - SEA
EWRSEA
Newark
Thu 4/16
7:20 am-10:29 am
Nonstop6h 09m
Seattle/Tacoma Intl
Mon 4/20
2:50 pm-11:11 pm
Nonstop5h 21m
$268
New YorkSeattle
JFK - SEA
JFKSEA
New York John F Kennedy Intl
Sun 9/6
6:40 pm-10:16 pm
Nonstop6h 36m
Seattle/Tacoma Intl
Wed 9/9
3:30 pm-12:09 am
Nonstop5h 39m
$276
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
IAD-SEA
EWR-SEA
LGA-SEA
JFK-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
IAD-SEA
EWR-SEA
LGA-SEA
What is the cheapest month to book a flight from Pennsylvania to Seattle?
Currently, February is the cheapest month in which you can book a flight from Pennsylvania to Seattle (average of $167). Flying from Pennsylvania to Seattle in September is currently the most expensive (average of $216). 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 March 10, 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 March 10, 2026.
The most flights from USPA to SEA are scheduled on a Monday (6 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (3 on average).
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 locationsTacoma
SeaTac
Lakewood
Ocean Shores
Olympia
Kent
Lynnwood
Edmonds
Lacey
Renton
Puyallup
Kirkland
Tukwila
Fife
Aberdeen
Shoreline
Marysville
Centralia
Federal Way
Chehalis
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.
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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 March 10, 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 March 10, 2026.
Pennsylvania to Seattle flights
Consider these flights traveling from Pennsylvania to Seattle.
Top 8 airlines flying from Pennsylvania to Seattle
Discover the top 8 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 March 10, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$99 | Average$226 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$115 | Average$237 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$123 | Average$351 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$157 | Average$405 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$176 | Average$436 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$178 | Average$496 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$202 | Average$480 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$221 | Average$458 | FlexibilityNo cancel fee | On-time69% |