$76+ Cheap flights from Philadelphia (PHL) to Washington
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 11 — Apr 181
Round-trip
1 adult, Economy
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Cheapest flights from Philadelphia to WashingtonExplore the most affordable flight options available from Philadelphia to Washington. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 12, 2026.
Explore the most affordable flight options available from Philadelphia to Washington. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 12, 2026.
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 4/188:41 pm
PHL
- GEG
1 stop17h 08m
Frontier
Sun 4/2611:44 am
GEG
- PHL
1 stop14h 50m
Frontier
Deal found 3/9![Frontier logo]()
$200
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.
Wed 4/158:41 pm
PHL
- SEA
1 stop15h 46m
Frontier
Wed 4/227:12 pm
SEA
- PHL
1 stop31h 22m
Frontier
Deal found 3/8![Frontier logo]()
$264
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/157:25 am
PHL
- SEA
Nonstop6h 05m
Multiple Airlines
Sun 4/197:12 pm
SEA
- PHL
1 stop7h 22m
Multiple Airlines
Deal found 3/7![Multiple Airlines logo]()
$265
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.
Wed 4/158:41 pm
PHL
- SEA
1 stop15h 46m
Frontier
Sun 4/197:12 pm
SEA
- PHL
2 stops26h 17m
Frontier
Deal found 3/8![Frontier logo]()
$266
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.
Wed 4/228:41 pm
PHL
- SEA
1 stop15h 46m
Frontier
Sat 4/257:12 pm
SEA
- PHL
1 stop31h 22m
Frontier
Deal found 3/8![Frontier logo]()
$267
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.
Sat 4/188:41 pm
PHL
- SEA
1 stop15h 46m
Frontier
Sat 4/257:12 pm
SEA
- PHL
1 stop31h 22m
Frontier
Deal found 3/8![Frontier logo]()
$269
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/288:36 pm
PHL
- SEA
1 stop16h 34m
Multiple Airlines
Mon 6/19:22 pm
SEA
- PHL
Nonstop5h 13m
Multiple Airlines
Deal found 3/8![Multiple Airlines logo]()
$270
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 4/78:25 pm
PHL
- SEA
2 stops23h 19m
Frontier
Fri 4/174:20 pm
SEA
- PHL
1 stop10h 14m
Frontier
Deal found 3/6![Frontier logo]()
$272
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.
Sun 4/58:25 pm
PHL
- SEA
1 stop18h 12m
Frontier
Thu 4/912:42 pm
SEA
- PHL
1 stop13h 49m
Frontier
Deal found 3/7![Frontier logo]()
$274
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/18:36 pm
PHL
- SEA
1 stop26h 23m
Frontier
Sun 6/79:14 pm
SEA
- PHL
1 stop29h 23m
Frontier
Deal found 3/9![Frontier logo]()
$276
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/138:25 pm
PHL
- SEA
1 stop21h 40m
Frontier
Sat 5/2311:25 am
SEA
- PHL
1 stop15h 12m
Frontier
Deal found 3/9![Frontier logo]()
$277
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.
Sat 4/118:25 pm
PHL
- SEA
1 stop18h 12m
Frontier
Tue 4/147:12 pm
SEA
- PHL
1 stop31h 22m
Frontier
Deal found 3/7![Frontier logo]()
$278
Best flights from Philadelphia to WashingtonDiscover carefully curated flight deals from Philadelphia to Washington that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 12, 2026.
Discover carefully curated flight deals from Philadelphia to Washington that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 12, 2026.
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.
Wed 5/137:10 am
PHL
- SEA
Nonstop5h 50m
Delta
Sat 5/239:20 pm
SEA
- PHL
Nonstop5h 17m
Delta
Deal found 3/7![Delta logo]()
$289
This Alaska Airlines 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/57:22 am
PHL
- SEA
Nonstop5h 58m
Alaska Airlines
Sat 5/99:44 pm
SEA
- PHL
Nonstop5h 18m
Alaska Airlines
Deal found 3/10![Alaska Airlines logo]()
$297
This Southwest deal was found by Cheapflights users on 3/11. 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.
Sat 4/1812:25 pm
PHL
- GEG
2 stops12h 10m
Southwest
Mon 4/202:50 pm
GEG
- PHL
1 stop6h 45m
Southwest
Deal found 3/11![Southwest logo]()
$343
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 4/151:27 pm
PHL
- PDX
1 stop8h 07m
United Airlines
Sat 4/1811:59 pm
PDX
- PHL
1 stop9h 18m
United Airlines
Deal found 3/7![United Airlines logo]()
$357
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 5/87:10 am
PHL
- SEA
Nonstop5h 50m
Delta
Thu 5/149:20 pm
SEA
- PHL
Nonstop5h 17m
Delta
Deal found 3/7![Delta logo]()
$289
This Alaska Airlines deal was found by Cheapflights users on 3/11. 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.
Fri 4/177:25 am
PHL
- SEA
Nonstop6h 05m
Alaska Airlines
Sat 4/259:32 am
SEA
- PHL
Nonstop5h 26m
Alaska Airlines
Deal found 3/11![Alaska Airlines logo]()
$297
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/167:05 am
PHL
- SEA
Nonstop5h 59m
Delta
Mon 6/299:50 pm
SEA
- PHL
Nonstop5h 15m
Delta
Deal found 3/9![Delta logo]()
$289
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.
Thu 8/277:05 am
PHL
- SEA
Nonstop5h 59m
Delta
Sun 9/69:50 pm
SEA
- PHL
Nonstop5h 15m
Delta
Deal found 3/8![Delta logo]()
$289
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.
Tue 4/287:22 am
PHL
- GEG
1 stop9h 01m
Alaska Airlines
Wed 4/297:41 pm
GEG
- PHL
1 stop7h 21m
Alaska Airlines
Deal found 3/8![Alaska Airlines logo]()
$328
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.
Thu 6/256:23 pm
PHL
- PSC
1 stop9h 27m
United Airlines
Tue 6/301:35 pm
PSC
- PHL
2 stops12h 56m
United Airlines
Deal found 3/7![United Airlines logo]()
$379
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.
Wed 6/247:05 am
PHL
- SEA
Nonstop5h 59m
Delta
Tue 6/309:50 pm
SEA
- PHL
Nonstop5h 15m
Delta
Deal found 3/8![Delta logo]()
$289
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.
Tue 6/95:15 am
PHL
- GEG
1 stop7h 20m
Southwest
Sat 6/136:25 am
GEG
- PHL
2 stops14h 40m
Southwest
Deal found 3/7![Southwest logo]()
$413
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 8/257:05 am
PHL
- SEA
Nonstop5h 59m
Delta
Sun 8/309:50 pm
SEA
- PHL
Nonstop5h 15m
Delta
Deal found 3/8![Delta logo]()
$289
This Alaska 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/217:25 am
PHL
- YKM
1 stop10h 01m
Alaska Airlines
Sat 4/256:15 am
YKM
- PHL
1 stop8h 43m
Alaska Airlines
Deal found 3/6![Alaska Airlines logo]()
$357
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 4/56:04 am
PHL
- PDX
1 stop8h 42m
United Airlines
Sun 4/1211:59 pm
PDX
- PHL
1 stop7h 29m
United Airlines
Deal found 3/6![United Airlines logo]()
$397
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/17:10 am
PHL
- SEA
Nonstop5h 50m
Delta
Sun 6/75:45 pm
SEA
- PHL
1 stop8h 58m
Delta
Deal found 3/9![Delta logo]()
$299
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/281:27 pm
PHL
- GEG
2 stops10h 44m
United Airlines
Wed 4/291:46 pm
GEG
- PHL
1 stop6h 58m
United Airlines
Deal found 3/8![United Airlines logo]()
$402
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/54:45 pm
PHL
- PDX
1 stop9h 00m
Southwest
Sun 6/149:45 pm
PDX
- PHL
2 stops9h 50m
Southwest
Deal found 3/10![Southwest logo]()
$462
This Alaska 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/297:22 am
PHL
- BLI
1 stop7h 58m
Alaska Airlines
Sat 5/27:19 pm
BLI
- PHL
1 stop7h 43m
Alaska Airlines
Deal found 3/7![Alaska Airlines logo]()
$389
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.
Wed 9/27:05 am
PHL
- SEA
Nonstop5h 59m
Delta
Mon 9/77:35 pm
SEA
- PHL
1 stop7h 08m
Delta
Deal found 3/7![Delta logo]()
$299
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.
Sat 4/255:00 pm
PHL
- PDX
1 stop8h 34m
United Airlines
Sun 4/2611:59 pm
PDX
- PHL
2 stops11h 11m
United Airlines
Deal found 3/9![United Airlines logo]()
$402
This Alaska 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/287:22 am
PHL
- PSC
1 stop8h 22m
Alaska Airlines
Sat 5/27:30 pm
PSC
- PHL
1 stop7h 32m
Alaska Airlines
Deal found 3/7![Alaska Airlines logo]()
$396
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.
Sat 8/225:15 pm
PHL
- SEA
1 stop7h 50m
Delta
Sun 8/309:50 pm
SEA
- PHL
Nonstop5h 15m
Delta
Deal found 3/7![Delta logo]()
$299
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.
Thu 4/26:21 pm
PHL
- PDX
1 stop9h 23m
United Airlines
Tue 4/711:59 pm
PDX
- PHL
1 stop9h 18m
United Airlines
Deal found 3/7![United Airlines logo]()
$407
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/171:27 pm
PHL
- PDX
2 stops14h 17m
United Airlines
Mon 4/2011:59 pm
PDX
- PHL
1 stop9h 18m
United Airlines
Deal found 3/10![United Airlines logo]()
$422
This Alaska Airlines 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/177:25 am
PHL
- YKM
1 stop19h 44m
Alaska Airlines
Mon 4/203:03 pm
YKM
- PHL
1 stop12h 02m
Alaska Airlines
Deal found 3/10![Alaska Airlines logo]()
$423
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/248:00 am
PHL
- SEA
1 stop11h 22m
Delta
Mon 8/319:50 pm
SEA
- PHL
Nonstop5h 15m
Delta
Deal found 3/9![Delta logo]()
$319
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.
Fri 4/246:58 pm
PHL
- BLI
1 stop20h 22m
Alaska Airlines
Mon 4/277:19 pm
BLI
- PHL
1 stop7h 43m
Alaska Airlines
Deal found 3/9![Alaska Airlines logo]()
$427
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/3010:00 am
PHL
- GEG
1 stop8h 12m
United Airlines
Mon 6/17:25 pm
GEG
- PHL
2 stops11h 20m
United Airlines
Deal found 3/10![United Airlines logo]()
$431
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.
Thu 5/77:01 pm
PHL
- GEG
1 stop7h 05m
Delta
Sat 5/165:37 pm
GEG
- PHL
1 stop9h 00m
Delta
Deal found 3/7![Delta logo]()
$338
Last-minute flights from Philadelphia to WashingtonDiscover last-minute flight deals from Philadelphia to Washington. Data last updated March 12, 2026 and is based on user searches.
Discover last-minute flight deals from Philadelphia to Washington. Data last updated March 12, 2026 and is based on user searches.
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/38:25 pm
PHL
- SEA
1 stop18h 12m
Frontier
Thu 4/912:42 pm
SEA
- PHL
1 stop13h 49m
Frontier
Deal found 3/10![Frontier logo]()
$277
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.
Sun 4/58:25 pm
PHL
- SEA
1 stop18h 12m
Frontier
Thu 4/912:42 pm
SEA
- PHL
1 stop13h 49m
Frontier
Deal found 3/7![Frontier logo]()
$274
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.
Mon 4/68:36 pm
PHL
- SEA
2 stops23h 08m
Frontier
Mon 4/1312:42 pm
SEA
- PHL
1 stop13h 49m
Frontier
Deal found 3/7![Frontier logo]()
$270
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 4/78:25 pm
PHL
- SEA
2 stops23h 19m
Frontier
Fri 4/174:20 pm
SEA
- PHL
1 stop10h 14m
Frontier
Deal found 3/6![Frontier logo]()
$272
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/77:10 pm
PHL
- SEA
2 stops24h 34m
Frontier
Tue 4/147:12 pm
SEA
- PHL
1 stop31h 22m
Frontier
Deal found 3/9![Frontier logo]()
$276
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.
Sat 4/118:25 pm
PHL
- SEA
1 stop18h 12m
Frontier
Tue 4/147:12 pm
SEA
- PHL
1 stop31h 22m
Frontier
Deal found 3/7![Frontier logo]()
$278
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.
Wed 4/158:41 pm
PHL
- SEA
1 stop15h 46m
Frontier
Wed 4/227:12 pm
SEA
- PHL
1 stop31h 22m
Frontier
Deal found 3/8![Frontier logo]()
$264
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/157:25 am
PHL
- SEA
Nonstop6h 05m
Multiple Airlines
Sun 4/197:12 pm
SEA
- PHL
1 stop7h 22m
Multiple Airlines
Deal found 3/7![Multiple Airlines logo]()
$265
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.
Wed 4/158:41 pm
PHL
- SEA
1 stop15h 46m
Frontier
Sun 4/197:12 pm
SEA
- PHL
2 stops26h 17m
Frontier
Deal found 3/8![Frontier logo]()
$266
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 4/188:41 pm
PHL
- GEG
1 stop17h 08m
Frontier
Sun 4/2611:44 am
GEG
- PHL
1 stop14h 50m
Frontier
Deal found 3/9![Frontier logo]()
$200
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.
Sat 4/188:41 pm
PHL
- SEA
1 stop15h 46m
Frontier
Sat 4/257:12 pm
SEA
- PHL
1 stop31h 22m
Frontier
Deal found 3/8![Frontier logo]()
$269
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.
Wed 4/228:41 pm
PHL
- SEA
1 stop15h 46m
Frontier
Sat 4/257:12 pm
SEA
- PHL
1 stop31h 22m
Frontier
Deal found 3/8![Frontier logo]()
$267
One-way flights from Philadelphia to WashingtonSearch for one-way flight options from Philadelphia to Washington. Find affordable one-way fares based on user searches. Data last updated March 12, 2026.
Search for one-way flight options from Philadelphia to Washington. Find affordable one-way fares based on user searches. Data last updated March 12, 2026.
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 4/298:31 pm
PHL
- SEA
1 stop15h 56m
Frontier
Deal found 3/9![Frontier logo]()
$76
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.
Sat 5/98:25 pm
PHL
- PDX
1 stop17h 38m
Frontier
Deal found 3/8![Frontier logo]()
$77
This Kiwi.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 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 3/9![Frontier logo]()
$82
This Trip.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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/158:25 pm
PHL
- PDX
1 stop18h 17m
Frontier
Deal found 3/8![Frontier logo]()
$92
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.
Tue 5/58:25 pm
PHL
- PDX
1 stop19h 37m
Frontier
Deal found 3/8![Frontier logo]()
$93
This Kiwi.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 Kiwi.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 3/9![Frontier logo]()
$93
This Trip.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 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 3/10![Frontier logo]()
$94
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.
Sun 4/58:25 pm
PHL
- PDX
1 stop17h 38m
Frontier
Deal found 3/6![Frontier logo]()
$97
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 3/7. 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 5/88:25 pm
PHL
- PDX
1 stop18h 17m
Frontier
Deal found 3/7![Frontier logo]()
$99
This Kiwi.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 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 3/9![Frontier logo]()
$99
This Kiwi.com deal was found by Cheapflights users on 3/11. 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.
Tue 4/148:41 pm
PHL
- PDX
1 stop17h 57m
Frontier
Deal found 3/11![Frontier logo]()
$100
Find flight deals from Philadelphia to Washington
Keep the following information in mind while searching for Philadelphia to Washington flight deals. Data was last updated March 12, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $200 (Frontier) |
One-way from | $76 (Trip.com) |
Popular in | June |
Cheapest in | October |
Average price | $357 |
Good round-trip deal | $361 or less |
Good one-way deal | $195 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Philadelphia to Washington 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 12, 2026.
Use the filters below to find and compare flights from Philadelphia to Washington that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Quickest round-trip
PhiladelphiaSeattle
PHL - SEA
PHLSEA
Philadelphia
Wed 5/13
7:10 am-10:00 am
Nonstop5h 50m
Seattle/Tacoma Intl
Sat 5/23
9:20 pm-5:37 am
Nonstop5h 17m
$289
PhiladelphiaSeattle
PHL - SEA
PHLSEA
Philadelphia
Fri 5/8
7:10 am-10:00 am
Nonstop5h 50m
Seattle/Tacoma Intl
Thu 5/14
9:20 pm-5:37 am
Nonstop5h 17m
$289
PhiladelphiaSeattle
PHL - SEA
PHLSEA
Philadelphia
Tue 6/16
7:05 am-10:04 am
Nonstop5h 59m
Seattle/Tacoma Intl
Mon 6/29
9:50 pm-6:05 am
Nonstop5h 15m
$289
PhiladelphiaSeattle
PHL - SEA
PHLSEA
Philadelphia
Thu 8/27
7:05 am-10:04 am
Nonstop5h 59m
Seattle/Tacoma Intl
Sun 9/6
9:50 pm-6:05 am
Nonstop5h 15m
$289
PhiladelphiaSeattle
PHL - SEA
PHLSEA
Philadelphia
Wed 6/24
7:05 am-10:04 am
Nonstop5h 59m
Seattle/Tacoma Intl
Tue 6/30
9:50 pm-6:05 am
Nonstop5h 15m
$289
PhiladelphiaSeattle
PHL - SEA
PHLSEA
Philadelphia
Tue 8/25
7:05 am-10:04 am
Nonstop5h 59m
Seattle/Tacoma Intl
Sun 8/30
9:50 pm-6:05 am
Nonstop5h 15m
$289
PhiladelphiaSeattle
PHL - SEA
PHLSEA
Philadelphia
Tue 5/5
7:22 am-10:20 am
Nonstop5h 58m
Seattle/Tacoma Intl
Sat 5/9
9:44 pm-6:02 am
Nonstop5h 18m
$297
PhiladelphiaSeattle
PHL - SEA
PHLSEA
Philadelphia
Fri 4/17
7:25 am-10:30 am
Nonstop6h 05m
Seattle/Tacoma Intl
Sat 4/25
9:32 am-5:58 pm
Nonstop5h 26m
$297
PhiladelphiaSeattle
PHL - SEA
PHLSEA
Philadelphia
Mon 6/1
7:10 am-10:00 am
Nonstop5h 50m
Seattle/Tacoma Intl
Sun 6/7
5:45 pm-5:43 am
1 stop8h 58m
$299
PhiladelphiaSeattle
PHL - SEA
PHLSEA
Philadelphia
Wed 9/2
7:05 am-10:04 am
Nonstop5h 59m
Seattle/Tacoma Intl
Mon 9/7
7:35 pm-5:43 am
1 stop7h 08m
$299
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Philadelphia to Washington
Have a flexible travel schedule? Discover the best time to fly to Washington from Philadelphia with our price prediction graph.
PHL-GEG
PHL-SEA
PHL-PDX
PHL-PSC
PHL-YKM
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 Philadelphia to Washington
PHL-USWA
PHL-GEG
PHL-SEA
PHL-PDX
PHL-PSC
What is the cheapest month to book a flight from Philadelphia to State of Washington?
Currently, October is the cheapest month in which you can book a flight from Philadelphia to State of Washington (average of $148). Flying from Philadelphia to State of Washington in April is currently the most expensive (average of $219). 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 PHL to WA?
Find hourly flight availability from Philadelphia to Washington. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated March 12, 2026.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Philadelphia to State of Washington as you normally would.
Weekly flight availability from Philadelphia to State of Washington
Explore weekly flight availability from Philadelphia to Washington. 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 12, 2026.
The most flights from PHL to USWA 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).
Reviews of airlines servicing Washington
Get insights into the airlines that provide service to Washington. 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 Washington. Reviews last updated March 12, 2026.
Read through reviews of airlines operating flights from Philadelphia to Washington, such as Alaska Airlines,Delta, andHawaiian Airlines. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.0
Comfort
7.8
Food
7.1
Overall
8.0
Boarding
8.1
Crew
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,Dec 2025
SJC - SEA
Entertainment
7.0
Comfort
7.8
Food
7.1
Overall
8.0
Boarding
8.1
Crew
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,Dec 2025
SJC - SEA
Entertainment
7.0
Comfort
7.8
Food
7.1
Overall
8.0
Boarding
8.1
Crew
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,Dec 2025
SJC - SEA
Entertainment
7.0
Comfort
7.8
Food
7.1
Overall
8.0
Boarding
8.1
Crew
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,Dec 2025
SJC - SEA
Entertainment
7.0
Comfort
7.8
Food
7.1
Overall
8.0
Boarding
8.1
Crew
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,Dec 2025
SJC - SEA
Entertainment
7.0
Comfort
7.8
Food
7.1
Overall
8.0
Boarding
8.1
Crew
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,Dec 2025
SJC - SEA
Related info for your journey
Find useful and relevant information for your journey from Philadelphia to Washington. 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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Complete your trip
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Find flights from Philadelphia to Washington, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Philadelphia and Washington flights
Browse other Philadelphia and Washington flight options. Last updated on March 12, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Philadelphia to Washington flights
Consider these flights traveling from Philadelphia to Washington.
Top 8 airlines flying from Philadelphia to Washington
Discover the top 8 airlines that operate flights from Philadelphia to Washington. 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 12, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$115 | Average$237 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$130 | Average$291 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$183 | Average$426 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$188 | Average$461 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$224 | Average$459 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$250 | Average$520 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$258 | Average$471 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$276 | Average$433 | FlexibilityNo cancel fee | On-time71% |