$120+ 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 6/5. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — PHL
mai 29 — jun 51
Round-trip
1 adult, Economy
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Find cheap flights from Seattle to Pennsylvania with Cheapflights
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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 abril 29, 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 abril 29, 2026.
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.
sex 5/2911:20 pm
SEA
- PIT
1 stop7h 20m
United Airlines
ter 6/26:11 pm
PIT
- SEA
1 stop8h 48m
United Airlines
Deal found 4/25![United Airlines logo]()
$239
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
qui 6/44:05 pm
SEA
- IAD
Nonstop5h 08m
Delta
qua 6/107:00 am
IAD
- SEA
Nonstop5h 45m
Delta
Deal found 4/24![Delta logo]()
$245
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sex 5/87:50 pm
SEA
- DCA
1 stop23h 08m
Frontier
ter 5/126:00 pm
DCA
- SEA
1 stop18h 49m
Frontier
Deal found 4/25![Frontier logo]()
$246
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.
qui 6/48:20 pm
SEA
- IAD
1 stop8h 52m
Frontier
ter 6/99:55 am
IAD
- SEA
1 stop27h 40m
Frontier
Deal found 4/26![Frontier logo]()
$247
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
qua 6/107:41 pm
SEA
- DCA
1 stop23h 18m
Frontier
dom 6/147:00 am
DCA
- SEA
1 stop29h 48m
Frontier
Deal found 4/27![Frontier logo]()
$250
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb 5/238:20 pm
SEA
- IAD
1 stop8h 52m
Frontier
dom 5/319:12 am
IAD
- SEA
1 stop28h 24m
Frontier
Deal found 4/25![Frontier logo]()
$250
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
qui 6/47:50 pm
SEA
- DCA
1 stop14h 09m
Frontier
seg 6/87:00 am
DCA
- SEA
1 stop10h 01m
Frontier
Deal found 4/28![Frontier logo]()
$255
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sex 9/46:00 pm
SEA
- IAD
1 stop8h 25m
United Airlines
seg 9/712:35 pm
IAD
- SEA
Nonstop5h 45m
United Airlines
Deal found 4/27![United Airlines logo]()
$255
This Orbitz 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom 5/247:50 pm
SEA
- DCA
1 stop14h 09m
Frontier
seg 6/17:00 am
DCA
- SEA
1 stop10h 01m
Frontier
Deal found 4/26![Frontier logo]()
$256
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.
qua 6/108:12 pm
SEA
- IAD
1 stop9h 13m
Frontier
qua 6/179:55 am
IAD
- SEA
1 stop27h 40m
Frontier
Deal found 4/25![Frontier logo]()
$256
This Super.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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
qua 6/108:12 pm
SEA
- IAD
1 stop9h 13m
Frontier
qua 6/249:55 am
IAD
- SEA
1 stop27h 40m
Frontier
Deal found 4/24![Frontier logo]()
$257
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sex 6/58:22 am
SEA
- IAD
Nonstop5h 13m
Multiple Airlines
dom 6/79:12 am
IAD
- SEA
1 stop28h 24m
Multiple Airlines
Deal found 4/27![Multiple Airlines logo]()
$258
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 abril 29, 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 abril 29, 2026.
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.
sex 6/54:05 pm
SEA
- IAD
Nonstop5h 08m
Delta
ter 6/97:00 am
IAD
- SEA
Nonstop5h 45m
Delta
Deal found 4/25![Delta logo]()
$245
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.
sex 5/298:30 pm
SEA
- EWR
1 stop16h 38m
Alaska Airlines
qua 6/36:29 pm
EWR
- SEA
Nonstop6h 13m
Alaska Airlines
Deal found 4/28![Alaska Airlines logo]()
$277
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.
qua 5/137:25 am
SEA
- EWR
Nonstop5h 24m
United Airlines
sáb 5/168:49 pm
EWR
- SEA
Nonstop6h 10m
United Airlines
Deal found 4/24![United Airlines logo]()
$277
This JetBlue 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
qua 5/2711:52 pm
SEA
- JFK
Nonstop5h 21m
JetBlue
sáb 5/305:29 pm
JFK
- SEA
Nonstop6h 27m
JetBlue
Deal found 4/28![JetBlue logo]()
$297
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.
qua 6/39:20 am
SEA
- PIT
1 stop10h 35m
Southwest
seg 6/86:40 pm
PIT
- SEA
2 stops10h 00m
Southwest
Deal found 4/27![Southwest logo]()
$323
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.
qua 6/310:27 am
SEA
- AVP
1 stop10h 28m
American Airlines
sex 9/255:43 pm
AVP
- SEA
1 stop8h 13m
American Airlines
Deal found 4/24![American Airlines logo]()
$448
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
qui 5/2810:40 pm
SEA
- EWR
1 stop7h 32m
United Airlines
qua 6/38:30 pm
EWR
- SEA
Nonstop6h 14m
United Airlines
Deal found 4/27![United Airlines logo]()
$277
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.
qui 9/103:53 pm
SEA
- IAD
Nonstop5h 06m
Alaska Airlines
seg 9/145:54 pm
IAD
- SEA
Nonstop5h 50m
Alaska Airlines
Deal found 4/27![Alaska Airlines logo]()
$285
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.
sáb 7/47:15 am
SEA
- JFK
Nonstop5h 30m
Delta
ter 7/147:25 pm
JFK
- SEA
Nonstop6h 43m
Delta
Deal found 4/26![Delta logo]()
$297
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ter 8/186:00 pm
SEA
- IAD
1 stop8h 25m
United Airlines
dom 8/235:18 pm
IAD
- SEA
Nonstop5h 45m
United Airlines
Deal found 4/27![United Airlines logo]()
$287
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.
sex 5/2911:30 am
SEA
- EWR
1 stop8h 35m
Delta
qua 6/36:30 pm
EWR
- SEA
1 stop8h 40m
Delta
Deal found 4/27![Delta logo]()
$298
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.
qui 6/411:05 pm
SEA
- DCA
1 stop9h 05m
Southwest
qua 6/104:55 pm
DCA
- SEA
2 stops10h 45m
Southwest
Deal found 4/25![Southwest logo]()
$335
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.
sáb 6/610:30 pm
SEA
- EWR
Nonstop5h 22m
Alaska Airlines
ter 6/94:35 pm
EWR
- SEA
1 stop19h 44m
Alaska Airlines
Deal found 4/25![Alaska Airlines logo]()
$316
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.
sex 7/2411:20 pm
SEA
- IAD
Nonstop5h 02m
United Airlines
ter 7/285:55 pm
IAD
- SEA
Nonstop5h 51m
United Airlines
Deal found 4/28![United Airlines logo]()
$288
This JetBlue 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
qui 7/910:19 pm
SEA
- JFK
Nonstop5h 20m
JetBlue
dom 7/121:20 pm
JFK
- SEA
1 stop12h 29m
JetBlue
Deal found 4/28![JetBlue logo]()
$382
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.
sáb 5/305:30 am
SEA
- LGA
1 stop7h 28m
Delta
sáb 6/66:15 pm
LGA
- SEA
1 stop8h 44m
Delta
Deal found 4/26![Delta logo]()
$318
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.
qui 6/49:22 pm
SEA
- PHL
Nonstop5h 13m
Alaska Airlines
qua 6/107:33 am
PHL
- SEA
Nonstop5h 59m
Alaska Airlines
Deal found 4/25![Alaska Airlines logo]()
$329
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.
qui 9/106:00 pm
SEA
- EWR
1 stop8h 41m
United Airlines
seg 9/148:35 pm
EWR
- SEA
Nonstop6h 10m
United Airlines
Deal found 4/25![United Airlines logo]()
$316
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.
qui 6/49:20 am
SEA
- PHL
Nonstop5h 15m
Delta
seg 6/86:45 pm
PHL
- SEA
Nonstop6h 14m
Delta
Deal found 4/27![Delta logo]()
$329
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.
ter 6/2311:05 pm
SEA
- PIT
1 stop8h 15m
Southwest
qui 6/256:40 pm
PIT
- SEA
2 stops10h 00m
Southwest
Deal found 4/26![Southwest logo]()
$402
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.
ter 5/268:22 am
SEA
- IAD
Nonstop5h 13m
Alaska Airlines
sáb 5/309:00 am
IAD
- SEA
Nonstop5h 45m
Alaska Airlines
Deal found 4/24![Alaska Airlines logo]()
$337
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
qui 10/229:50 pm
SEA
- PHL
Nonstop5h 13m
Delta
dom 10/257:05 am
PHL
- SEA
Nonstop6h 19m
Delta
Deal found 4/24![Delta logo]()
$329
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ter 8/1811:56 pm
SEA
- DCA
1 stop8h 29m
United Airlines
dom 8/236:00 pm
DCA
- SEA
1 stop7h 42m
United Airlines
Deal found 4/27![United Airlines logo]()
$330
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.
qui 5/285:30 am
SEA
- LGA
2 stops10h 25m
Southwest
qua 6/35:45 pm
LGA
- SEA
1 stop9h 25m
Southwest
Deal found 4/27![Southwest logo]()
$402
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.
sex 6/56:26 am
SEA
- DCA
1 stop11h 34m
Alaska Airlines
ter 6/95:00 pm
DCA
- SEA
Nonstop6h 01m
Alaska Airlines
Deal found 4/27![Alaska Airlines logo]()
$340
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.
qui 8/136:00 pm
SEA
- EWR
1 stop8h 41m
United Airlines
qua 8/197:59 am
EWR
- SEA
Nonstop6h 04m
United Airlines
Deal found 4/25![United Airlines logo]()
$333
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.
sex 5/295:30 am
SEA
- LGA
1 stop7h 28m
Delta
qua 6/39:29 am
LGA
- SEA
1 stop8h 21m
Delta
Deal found 4/26![Delta logo]()
$336
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.
seg 6/811:05 pm
SEA
- PIT
2 stops10h 00m
Southwest
seg 6/156:40 pm
PIT
- SEA
2 stops10h 00m
Southwest
Deal found 4/28![Southwest logo]()
$407
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.
sáb 5/2310:35 pm
SEA
- SCE
1 stop10h 05m
American Airlines
sáb 5/306:05 am
SCE
- SEA
1 stop8h 36m
American Airlines
Deal found 4/28![American Airlines logo]()
$546
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.
qua 9/28:45 am
SEA
- JFK
1 stop11h 14m
Alaska Airlines
sex 9/47:25 am
JFK
- SEA
Nonstop6h 09m
Alaska Airlines
Deal found 4/25![Alaska Airlines logo]()
$345
Last-minute flights from Seattle to PennsylvaniaDiscover last-minute flight deals from Seattle to Pennsylvania. Data last updated abril 29, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to Pennsylvania. Data last updated abril 29, 2026 and is based on user searches.
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sex 5/87:50 pm
SEA
- DCA
1 stop23h 08m
Frontier
ter 5/126:00 pm
DCA
- SEA
1 stop18h 49m
Frontier
Deal found 4/25![Frontier logo]()
$246
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ter 5/197:50 pm
SEA
- DCA
1 stop14h 09m
Frontier
dom 5/247:00 am
DCA
- SEA
1 stop10h 01m
Frontier
Deal found 4/24![Frontier logo]()
$250
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.
qua 5/207:50 pm
SEA
- DCA
1 stop14h 09m
Frontier
dom 5/247:00 am
DCA
- SEA
1 stop10h 01m
Frontier
Deal found 4/27![Frontier logo]()
$255
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb 5/238:20 pm
SEA
- IAD
1 stop8h 52m
Frontier
dom 5/319:12 am
IAD
- SEA
1 stop28h 24m
Frontier
Deal found 4/25![Frontier logo]()
$250
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb 5/237:50 pm
SEA
- DCA
1 stop14h 09m
Frontier
sex 5/291:59 pm
DCA
- SEA
1 stop23h 07m
Frontier
Deal found 4/29![Frontier logo]()
$261
This Orbitz 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom 5/247:50 pm
SEA
- DCA
1 stop14h 09m
Frontier
seg 6/17:00 am
DCA
- SEA
1 stop10h 01m
Frontier
Deal found 4/26![Frontier logo]()
$256
This Travelocity 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom 5/248:20 pm
SEA
- IAD
1 stop8h 52m
Frontier
dom 5/319:12 am
IAD
- SEA
1 stop28h 24m
Frontier
Deal found 4/26![Frontier logo]()
$256
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.
dom 5/247:50 pm
SEA
- DCA
1 stop14h 09m
Frontier
sex 6/57:00 am
DCA
- SEA
1 stop30h 06m
Frontier
Deal found 4/27![Frontier logo]()
$263
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.
qui 5/287:50 pm
SEA
- DCA
1 stop23h 08m
Frontier
seg 6/17:00 am
DCA
- SEA
1 stop10h 01m
Frontier
Deal found 4/28![Frontier logo]()
$262
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.
sex 5/2911:20 pm
SEA
- PIT
1 stop7h 20m
United Airlines
qua 6/36:11 pm
PIT
- SEA
1 stop8h 48m
United Airlines
Deal found 4/25![United Airlines logo]()
$239
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.
sex 5/298:20 pm
SEA
- IAD
1 stop8h 52m
Frontier
qui 6/49:12 am
IAD
- SEA
1 stop28h 24m
Frontier
Deal found 4/25![Frontier logo]()
$264
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.
sex 5/2911:58 pm
SEA
- DCA
1 stop7h 09m
American Airlines
ter 6/25:22 pm
DCA
- SEA
1 stop9h 54m
American Airlines
Deal found 4/27![American Airlines logo]()
$265
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 abril 29, 2026.
Search for one-way flight options from Seattle to Pennsylvania. Find affordable one-way fares based on user searches. Data last updated abril 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.
sex 6/51:58 pm
SEA
- PIT
1 stop7h 01m
American Airlines
Deal found 4/29![American Airlines logo]()
$120
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.
sáb 5/96:52 pm
SEA
- DCA
1 stop15h 07m
Frontier
Deal found 4/28![Frontier logo]()
$136
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
qua 5/277:50 pm
SEA
- IAD
2 stops17h 31m
Frontier
Deal found 4/28![Frontier logo]()
$136
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
qua 7/87:41 pm
SEA
- DCA
1 stop23h 18m
Frontier
Deal found 4/27![Frontier logo]()
$137
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
qui 5/147:50 pm
SEA
- DCA
1 stop23h 08m
Frontier
Deal found 4/28![Frontier logo]()
$138
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.
ter 5/127:55 am
SEA
- EWR
Nonstop5h 38m
Alaska Airlines
Deal found 4/28![Alaska Airlines logo]()
$139
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.
sex 5/293:30 pm
SEA
- EWR
Nonstop5h 29m
Alaska Airlines
Deal found 4/24![Alaska Airlines logo]()
$140
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.
seg 5/117:50 pm
SEA
- PHL
2 stops48h 55m
Multiple Airlines
Deal found 4/25![Multiple Airlines logo]()
$142
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sex 5/297:50 pm
SEA
- IAD
2 stops17h 31m
Frontier
Deal found 4/26![Frontier logo]()
$142
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
seg 5/187:50 pm
SEA
- DCA
1 stop23h 08m
Frontier
Deal found 4/28![Frontier logo]()
$143
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.
sex 6/54:05 pm
SEA
- IAD
Nonstop5h 08m
Delta
Deal found 4/28![Delta logo]()
$143
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
qua 5/277:00 am
SEA
- EWR
1 stop7h 56m
United Airlines
Deal found 4/29![United Airlines logo]()
$144
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 abril 29, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $239 (United Airlines) |
One-way from | $120 (American Airlines) |
Popular in | December |
Cheapest in | October |
Average price | $447 |
Good round-trip deal | $405 or less |
Good one-way deal | $200 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 abril 29, 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
Quickest round-trip
SeattleWashington, D.C.
SEA - IAD
SEAIAD
Seattle/Tacoma Intl
sex 6/5
4:05 pm-12:13 am
Nonstop5h 08m
Washington, D.C. Dulles Intl
ter 6/9
7:00 am-9:45 am
Nonstop5h 45m
$245
SeattleNewark
SEA - EWR
SEAEWR
Seattle/Tacoma Intl
sex 5/29
8:30 pm-4:08 pm
1 stop16h 38m
Newark
qua 6/3
6:29 pm-9:42 pm
Nonstop6h 13m
$277
SeattleNewark
SEA - EWR
SEAEWR
Seattle/Tacoma Intl
qua 5/13
7:25 am-3:49 pm
Nonstop5h 24m
Newark
sáb 5/16
8:49 pm-11:59 pm
Nonstop6h 10m
$277
SeattleNewark
SEA - EWR
SEAEWR
Seattle/Tacoma Intl
qui 5/28
10:40 pm-9:12 am
1 stop7h 32m
Newark
qua 6/3
8:30 pm-11:44 pm
Nonstop6h 14m
$277
SeattleWashington, D.C.
SEA - IAD
SEAIAD
Seattle/Tacoma Intl
qui 9/10
3:53 pm-11:59 pm
Nonstop5h 06m
Washington, D.C. Dulles Intl
seg 9/14
5:54 pm-8:44 pm
Nonstop5h 50m
$285
SeattleWashington, D.C.
SEA - IAD
SEAIAD
Seattle/Tacoma Intl
ter 8/18
6:00 pm-5:25 am
1 stop8h 25m
Washington, D.C. Dulles Intl
dom 8/23
5:18 pm-8:03 pm
Nonstop5h 45m
$287
SeattleWashington, D.C.
SEA - IAD
SEAIAD
Seattle/Tacoma Intl
sex 7/24
11:20 pm-7:22 am
Nonstop5h 02m
Washington, D.C. Dulles Intl
ter 7/28
5:55 pm-8:46 pm
Nonstop5h 51m
$288
SeattleNew York
SEA - JFK
SEAJFK
Seattle/Tacoma Intl
qua 5/27
11:52 pm-8:13 am
Nonstop5h 21m
New York John F Kennedy Intl
sáb 5/30
5:29 pm-8:56 pm
Nonstop6h 27m
$297
SeattleNew York
SEA - JFK
SEAJFK
Seattle/Tacoma Intl
sáb 7/4
7:15 am-3:45 pm
Nonstop5h 30m
New York John F Kennedy Intl
ter 7/14
7:25 pm-11:08 pm
Nonstop6h 43m
$297
SeattleNewark
SEA - EWR
SEAEWR
Seattle/Tacoma Intl
sex 5/29
11:30 am-11:05 pm
1 stop8h 35m
Newark
qua 6/3
6:30 pm-12:10 am
1 stop8h 40m
$298
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Seattle to Pennsylvania
Have a flexible travel schedule? Discover the best time to fly to Pennsylvania from Seattle with our price prediction graph.
SEA-PIT
SEA-DCA
SEA-IAD
SEA-EWR
SEA-PHL
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Seattle to Pennsylvania
SEA-USPA
SEA-PIT
SEA-DCA
SEA-IAD
SEA-EWR
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.
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 April is currently the most expensive (average of $177). 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 abril 29, 2026.
It’s typically best to fly out from Seattle to Pennsylvania in the evening. Doing so could potentially save you 44% 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 abril 29, 2026.
The most flights from SEA to USPA are scheduled on a Monday (8 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (2 on average).
How much does it cost to fly round-trip from Seattle to Pennsylvania?
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 abril 29, 2026.
Read reviews from past customers who have flown Southwest,Alaska Airlines, andDelta from Seattle to Pennsylvania. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.5
Overall
8.0
Comfort
8.0
Crew
8.6
Boarding
8.1
Food
7.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Entertainment
7.5
Overall
8.0
Comfort
8.0
Crew
8.6
Boarding
8.1
Food
7.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Entertainment
7.5
Overall
8.0
Comfort
8.0
Crew
8.6
Boarding
8.1
Food
7.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Entertainment
7.5
Overall
8.0
Comfort
8.0
Crew
8.6
Boarding
8.1
Food
7.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Entertainment
7.5
Overall
8.0
Comfort
8.0
Crew
8.6
Boarding
8.1
Food
7.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Entertainment
7.5
Overall
8.0
Comfort
8.0
Crew
8.6
Boarding
8.1
Food
7.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
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 abril 29, 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 abril 29, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$139 | Average$286 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$148 | Average$346 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$178 | Average$426 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$178 | Average$447 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$193 | Average$487 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$194 | Average$519 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$222 | Average$442 | FlexibilityNo cancel fee | On-time85% |