$105+ Cheap flights from Washington to Delaware
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 6/2. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — ILG
Jun 16 — Jun 231
Round-trip
1 adult, Economy
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Find cheap flights from Washington to Delaware with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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Cheapest flights from Washington to DelawareExplore the most affordable flight options available from Washington to Delaware. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 17, 2026.
Explore the most affordable flight options available from Washington to Delaware. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 17, 2026.
This Delta deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/1512:40 pm
GEG
- PHL
1 stop8h 41m
Delta
Mon 10/197:05 am
PHL
- GEG
1 stop10h 40m
Delta
Deal found 5/13![Delta logo]()
$279
This Alaska Airlines deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/285:09 am
GEG
- PHL
1 stop7h 35m
Alaska Airlines
Sat 8/294:44 pm
PHL
- GEG
1 stop9h 30m
Alaska Airlines
Deal found 5/12![Alaska Airlines logo]()
$312
This Delta deal was found by Cheapflights users on 5/15. Clicking the “Pick Dates” 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 6/107:00 am
GEG
- PHL
1 stop7h 35m
Delta
Sun 6/146:45 pm
PHL
- GEG
1 stop8h 10m
Delta
Deal found 5/15![Delta logo]()
$314
This American Airlines deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/102:01 pm
GEG
- PHL
1 stop7h 38m
American Airlines
Sun 6/147:36 am
PHL
- GEG
1 stop8h 35m
American Airlines
Deal found 5/13![American Airlines logo]()
$316
This Delta deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/910:48 pm
GEG
- PHL
1 stop7h 43m
Delta
Tue 8/46:15 am
PHL
- GEG
1 stop8h 13m
Delta
Deal found 5/12![Delta logo]()
$317
This Alaska Airlines deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/75:00 am
GEG
- PHL
1 stop7h 45m
Alaska Airlines
Tue 6/97:00 am
PHL
- GEG
1 stop9h 04m
Alaska Airlines
Deal found 5/12![Alaska Airlines logo]()
$328
This Delta deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/179:25 am
SEA
- PHL
Nonstop5h 10m
Delta
Sun 6/216:45 pm
PHL
- SEA
Nonstop6h 14m
Delta
Deal found 5/12![Delta logo]()
$329
This Expedia deal was found by Cheapflights users on 5/16. Clicking the “Pick Dates” 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.
Mon 6/87:50 pm
SEA
- PHL
1 stop12h 57m
Frontier
Tue 6/97:06 pm
PHL
- SEA
1 stop18h 29m
Frontier
Deal found 5/16![Frontier logo]()
$330
This Expedia deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/2811:03 am
SEA
- PHL
1 stop19h 13m
Multiple Airlines
Mon 9/74:44 pm
PHL
- SEA
1 stop16h 14m
Multiple Airlines
Deal found 5/12![Multiple Airlines logo]()
$331
This Alaska Airlines deal was found by Cheapflights users on 5/16. Clicking the “Pick Dates” 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 6/69:22 pm
SEA
- PHL
Nonstop5h 13m
Alaska Airlines
Sun 6/77:00 am
PHL
- SEA
Nonstop5h 59m
Alaska Airlines
Deal found 5/16![Alaska Airlines logo]()
$332
This Delta deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/99:25 am
SEA
- PHL
Nonstop5h 10m
Delta
Sun 6/216:45 pm
PHL
- SEA
Nonstop6h 14m
Delta
Deal found 5/13![Delta logo]()
$333
This Expedia deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/237:41 pm
SEA
- PHL
1 stop13h 08m
Multiple Airlines
Mon 7/275:46 pm
PHL
- SEA
1 stop7h 41m
Multiple Airlines
Deal found 5/12![Multiple Airlines logo]()
$335
Best flights from Washington to DelawareDiscover carefully curated flight deals from Washington to Delaware that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 17, 2026.
Discover carefully curated flight deals from Washington to Delaware that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 17, 2026.
This Delta deal was found by Cheapflights users on 5/14. Clicking the “Pick Dates” 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 8/137:15 pm
GEG
- PHL
1 stop7h 50m
Delta
Tue 8/187:00 am
PHL
- GEG
1 stop8h 16m
Delta
Deal found 5/14![Delta logo]()
$279
This Alaska Airlines deal was found by Cheapflights users on 5/16. Clicking the “Pick Dates” 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 8/285:12 am
GEG
- PHL
1 stop7h 33m
Alaska Airlines
Sat 8/294:48 pm
PHL
- GEG
1 stop9h 23m
Alaska Airlines
Deal found 5/16![Alaska Airlines logo]()
$312
This Southwest deal was found by Cheapflights users on 5/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/136:00 am
GEG
- PHL
1 stop8h 55m
Southwest
Tue 8/183:00 pm
PHL
- GEG
2 stops10h 25m
Southwest
Deal found 5/14![Southwest logo]()
$350
This United Airlines deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/2910:40 pm
SEA
- PHL
1 stop8h 35m
United Airlines
Tue 6/21:31 pm
PHL
- SEA
1 stop8h 34m
United Airlines
Deal found 5/13![United Airlines logo]()
$377
This American Airlines deal was found by Cheapflights users on 5/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/293:29 pm
PSC
- PHL
1 stop11h 05m
American Airlines
Tue 6/21:52 pm
PHL
- PSC
2 stops12h 33m
American Airlines
Deal found 5/14![American Airlines logo]()
$436
This Delta deal was found by Cheapflights users on 5/16. Clicking the “Pick Dates” 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 10/1012:40 pm
GEG
- PHL
1 stop8h 41m
Delta
Tue 10/133:10 pm
PHL
- GEG
1 stop7h 17m
Delta
Deal found 5/16![Delta logo]()
$279
This Delta deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/155:37 pm
GEG
- PHL
1 stop8h 52m
Delta
Tue 7/216:25 am
PHL
- GEG
1 stop8h 15m
Delta
Deal found 5/12![Delta logo]()
$279
This Southwest deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/79:30 am
SEA
- PHL
2 stops8h 50m
Southwest
Tue 7/146:40 pm
PHL
- SEA
1 stop8h 40m
Southwest
Deal found 5/12![Southwest logo]()
$354
This Delta deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/164:30 pm
GEG
- PHL
1 stop9h 59m
Delta
Tue 7/215:40 am
PHL
- GEG
1 stop8h 59m
Delta
Deal found 5/13![Delta logo]()
$317
This Alaska Airlines deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/255:20 am
PSC
- PHL
1 stop7h 24m
Alaska Airlines
Wed 8/267:00 am
PHL
- PSC
1 stop9h 14m
Alaska Airlines
Deal found 5/13![Alaska Airlines logo]()
$399
This Southwest deal was found by Cheapflights users on 5/16. Clicking the “Pick Dates” 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 10/212:15 am
SEA
- PHL
1 stop8h 20m
Southwest
Sat 10/35:00 pm
PHL
- SEA
1 stop7h 30m
Southwest
Deal found 5/16![Southwest logo]()
$374
This Delta deal was found by Cheapflights users on 5/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/239:20 pm
SEA
- PHL
Nonstop5h 09m
Delta
Mon 7/277:05 am
PHL
- SEA
Nonstop5h 56m
Delta
Deal found 5/15![Delta logo]()
$329
This Southwest deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/68:20 am
PDX
- PHL
2 stops9h 35m
Southwest
Tue 6/94:35 pm
PHL
- PDX
1 stop9h 55m
Southwest
Deal found 5/13![Southwest logo]()
$382
This Alaska Airlines deal was found by Cheapflights users on 5/14. Clicking the “Pick Dates” 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 8/214:00 pm
PSC
- PHL
1 stop20h 44m
Alaska Airlines
Mon 8/244:44 pm
PHL
- PSC
1 stop9h 04m
Alaska Airlines
Deal found 5/14![Alaska Airlines logo]()
$424
This Delta deal was found by Cheapflights users on 5/16. Clicking the “Pick Dates” 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 8/119:29 pm
SEA
- PHL
Nonstop5h 11m
Delta
Tue 8/187:00 am
PHL
- SEA
Nonstop5h 56m
Delta
Deal found 5/16![Delta logo]()
$329
This Alaska Airlines deal was found by Cheapflights users on 5/16. Clicking the “Pick Dates” 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 8/267:30 am
PDX
- PHL
Nonstop5h 15m
Alaska Airlines
Thu 9/36:08 pm
PHL
- PDX
1 stop7h 50m
Alaska Airlines
Deal found 5/16![Alaska Airlines logo]()
$427
This Southwest deal was found by Cheapflights users on 5/16. Clicking the “Pick Dates” 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 6/68:20 am
PDX
- PHL
2 stops9h 35m
Southwest
Fri 6/1212:50 pm
PHL
- PDX
2 stops10h 10m
Southwest
Deal found 5/16![Southwest logo]()
$393
This Delta deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/19:50 pm
SEA
- PHL
Nonstop5h 15m
Delta
Mon 10/57:05 am
PHL
- SEA
Nonstop5h 59m
Delta
Deal found 5/13![Delta logo]()
$329
This Alaska Airlines deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/114:07 pm
PDX
- PHL
1 stop10h 26m
Alaska Airlines
Sat 11/215:15 pm
PHL
- PDX
Nonstop5h 51m
Alaska Airlines
Deal found 5/13![Alaska Airlines logo]()
$427
This Southwest deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/711:30 pm
PDX
- PHL
1 stop8h 05m
Southwest
Mon 6/84:45 pm
PHL
- PDX
1 stop9h 00m
Southwest
Deal found 5/13![Southwest logo]()
$397
This Delta deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/277:30 am
SEA
- PHL
1 stop10h 19m
Delta
Fri 5/297:10 am
PHL
- SEA
Nonstop5h 50m
Delta
Deal found 5/12![Delta logo]()
$339
This Alaska Airlines deal was found by Cheapflights users on 5/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/255:35 pm
PDX
- PHL
1 stop9h 05m
Alaska Airlines
Wed 9/26:04 pm
PHL
- PDX
1 stop7h 54m
Alaska Airlines
Deal found 5/15![Alaska Airlines logo]()
$437
This Southwest deal was found by Cheapflights users on 5/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/136:00 am
GEG
- PHL
1 stop8h 55m
Southwest
Sun 8/167:20 am
PHL
- GEG
2 stops11h 40m
Southwest
Deal found 5/14![Southwest logo]()
$402
This Delta deal was found by Cheapflights users on 5/16. Clicking the “Pick Dates” 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 7/319:20 pm
SEA
- PHL
Nonstop5h 09m
Delta
Thu 8/67:00 pm
PHL
- SEA
1 stop7h 59m
Delta
Deal found 5/16![Delta logo]()
$339
This Alaska Airlines deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/155:15 am
EAT
- PHL
1 stop8h 53m
Alaska Airlines
Sat 9/196:06 pm
PHL
- EAT
1 stop8h 53m
Alaska Airlines
Deal found 5/12![Alaska Airlines logo]()
$448
This Southwest deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/75:10 am
PDX
- PHL
2 stops10h 30m
Southwest
Mon 7/135:00 am
PHL
- PDX
1 stop9h 10m
Southwest
Deal found 5/13![Southwest logo]()
$410
This Delta deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/85:45 pm
SEA
- PHL
1 stop8h 56m
Delta
Mon 10/127:15 pm
PHL
- SEA
1 stop7h 44m
Delta
Deal found 5/13![Delta logo]()
$349
This American Airlines deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/68:10 am
SEA
- SBY
1 stop12h 00m
American Airlines
Wed 6/106:40 am
SBY
- SEA
1 stop17h 55m
American Airlines
Deal found 5/13![American Airlines logo]()
$768
This Alaska Airlines deal was found by Cheapflights users on 5/15. Clicking the “Pick Dates” 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 10/155:04 am
GEG
- PHL
1 stop7h 02m
Alaska Airlines
Mon 10/197:00 am
PHL
- GEG
2 stops16h 54m
Alaska Airlines
Deal found 5/15![Alaska Airlines logo]()
$450
This Southwest deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/117:00 am
GEG
- PHL
2 stops8h 00m
Southwest
Tue 8/183:00 pm
PHL
- GEG
2 stops10h 25m
Southwest
Deal found 5/12![Southwest logo]()
$410
Last-minute flights from Washington to DelawareDiscover last-minute flight deals from Washington to Delaware. Data last updated May 17, 2026 and is based on user searches.
Discover last-minute flight deals from Washington to Delaware. Data last updated May 17, 2026 and is based on user searches.
This Alaska Airlines deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/49:22 pm
SEA
- PHL
Nonstop5h 13m
Alaska Airlines
Mon 6/87:16 pm
PHL
- SEA
Nonstop6h 12m
Alaska Airlines
Deal found 5/13![Alaska Airlines logo]()
$337
This Alaska Airlines deal was found by Cheapflights users on 5/16. Clicking the “Pick Dates” 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 6/69:22 pm
SEA
- PHL
Nonstop5h 13m
Alaska Airlines
Sun 6/77:00 am
PHL
- SEA
Nonstop5h 59m
Alaska Airlines
Deal found 5/16![Alaska Airlines logo]()
$332
This American Airlines deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/610:40 pm
PDX
- PHL
Nonstop5h 10m
American Airlines
Tue 6/98:25 am
PHL
- PDX
Nonstop6h 09m
American Airlines
Deal found 5/13![American Airlines logo]()
$337
This Alaska Airlines deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/75:00 am
GEG
- PHL
1 stop7h 45m
Alaska Airlines
Tue 6/97:00 am
PHL
- GEG
1 stop9h 04m
Alaska Airlines
Deal found 5/12![Alaska Airlines logo]()
$328
This Delta deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/810:48 pm
GEG
- PHL
1 stop7h 46m
Delta
Tue 6/96:45 pm
PHL
- GEG
1 stop8h 10m
Delta
Deal found 5/12![Delta logo]()
$279
This Expedia deal was found by Cheapflights users on 5/16. Clicking the “Pick Dates” 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.
Mon 6/87:50 pm
SEA
- PHL
1 stop12h 57m
Frontier
Tue 6/97:06 pm
PHL
- SEA
1 stop18h 29m
Frontier
Deal found 5/16![Frontier logo]()
$330
This Delta deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/99:25 am
SEA
- PHL
Nonstop5h 10m
Delta
Sun 6/216:45 pm
PHL
- SEA
Nonstop6h 14m
Delta
Deal found 5/13![Delta logo]()
$333
This Delta deal was found by Cheapflights users on 5/15. Clicking the “Pick Dates” 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 6/107:00 am
GEG
- PHL
1 stop7h 35m
Delta
Sun 6/146:45 pm
PHL
- GEG
1 stop8h 10m
Delta
Deal found 5/15![Delta logo]()
$314
This American Airlines deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/102:01 pm
GEG
- PHL
1 stop7h 38m
American Airlines
Sun 6/147:36 am
PHL
- GEG
1 stop8h 35m
American Airlines
Deal found 5/13![American Airlines logo]()
$316
This Delta deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/127:08 pm
GEG
- PHL
1 stop8h 00m
Delta
Mon 6/154:10 pm
PHL
- GEG
1 stop8h 27m
Delta
Deal found 5/13![Delta logo]()
$312
This Delta deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/179:25 am
SEA
- PHL
Nonstop5h 10m
Delta
Mon 6/226:45 pm
PHL
- SEA
Nonstop6h 14m
Delta
Deal found 5/12![Delta logo]()
$329
This Delta deal was found by Cheapflights users on 5/16. Clicking the “Pick Dates” 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 6/2312:47 pm
GEG
- PHL
1 stop9h 12m
Delta
Fri 7/36:45 pm
PHL
- GEG
1 stop8h 10m
Delta
Deal found 5/16![Delta logo]()
$317
One-way flights from Washington to DelawareSearch for one-way flight options from Washington to Delaware. Find affordable one-way fares based on user searches. Data last updated May 17, 2026.
Search for one-way flight options from Washington to Delaware. Find affordable one-way fares based on user searches. Data last updated May 17, 2026.
This Frontier deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/25:46 pm
PDX
- PHL
1 stop8h 51m
Frontier
Deal found 5/12![Frontier logo]()
$105
This Frontier deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/56:59 pm
PDX
- PHL
1 stop8h 23m
Frontier
Deal found 5/12![Frontier logo]()
$125
This Frontier deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/612:35 pm
PDX
- PHL
1 stop14h 02m
Frontier
Deal found 5/12![Frontier logo]()
$131
This Trip.com deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/115:42 pm
PDX
- PHL
1 stop12h 39m
Frontier
Deal found 5/13![Frontier logo]()
$133
This Kiwi.com deal was found by Cheapflights users on 5/14. Clicking the “Pick Dates” 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 7/312:26 pm
PDX
- PHL
1 stop14h 12m
Frontier
Deal found 5/14![Frontier logo]()
$140
This Delta deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/157:08 pm
GEG
- PHL
1 stop8h 00m
Delta
Deal found 5/13![Delta logo]()
$140
This Expedia deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/118:42 pm
PDX
- PHL
1 stop30h 45m
Frontier
Deal found 5/12![Frontier logo]()
$151
This Trip.com deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/812:35 pm
PDX
- PHL
1 stop14h 02m
Frontier
Deal found 5/13![Frontier logo]()
$153
This Booking.com deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/295:16 pm
PDX
- PHL
1 stop15h 33m
Frontier
Deal found 5/12![Frontier logo]()
$157
This Frontier deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/3112:35 pm
PDX
- PHL
1 stop14h 02m
Frontier
Deal found 5/12![Frontier logo]()
$161
This Kiwi.com deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/95:20 pm
PDX
- PHL
2 stops34h 07m
Frontier
Deal found 5/12![Frontier logo]()
$163
This Delta deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/99:50 pm
SEA
- PHL
Nonstop5h 13m
Delta
Deal found 5/13![Delta logo]()
$165
Find flight deals from Washington to Delaware
Keep the following information in mind while searching for Washington to Delaware flight deals. Data was last updated May 17, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $279 (Delta) |
One-way from | $105 (Frontier) |
Popular in | December |
Cheapest in | October |
Average price | $430 |
Cheapflights Fare Finder
Customize your flight search to find flights from Washington to Delaware 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 May 17, 2026.
Use the filters below to find and compare flights from Washington to Delaware that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
SpokanePhiladelphia
GEG - PHL
GEGPHL
Spokane
Thu 8/13
7:15 pm-6:05 am
1 stop7h 50m
Philadelphia
Tue 8/18
7:00 am-12:16 pm
1 stop8h 16m
$279
SpokanePhiladelphia
GEG - PHL
GEGPHL
Spokane
Sat 10/10
12:40 pm-12:21 am
1 stop8h 41m
Philadelphia
Tue 10/13
3:10 pm-7:27 pm
1 stop7h 17m
$279
SpokanePhiladelphia
GEG - PHL
GEGPHL
Spokane
Wed 7/15
5:37 pm-5:29 am
1 stop8h 52m
Philadelphia
Tue 7/21
6:25 am-11:40 am
1 stop8h 15m
$279
SpokanePhiladelphia
GEG - PHL
GEGPHL
Spokane
Fri 8/28
5:12 am-3:45 pm
1 stop7h 33m
Philadelphia
Sat 8/29
4:48 pm-11:11 pm
1 stop9h 23m
$312
SpokanePhiladelphia
GEG - PHL
GEGPHL
Spokane
Thu 7/16
4:30 pm-5:29 am
1 stop9h 59m
Philadelphia
Tue 7/21
5:40 am-11:39 am
1 stop8h 59m
$317
Quickest round-trip
SeattlePhiladelphia
SEA - PHL
SEAPHL
Seattle/Tacoma Intl
Thu 7/23
9:20 pm-5:29 am
Nonstop5h 09m
Philadelphia
Mon 7/27
7:05 am-10:01 am
Nonstop5h 56m
$329
SeattlePhiladelphia
SEA - PHL
SEAPHL
Seattle/Tacoma Intl
Tue 8/11
9:29 pm-5:40 am
Nonstop5h 11m
Philadelphia
Tue 8/18
7:00 am-9:56 am
Nonstop5h 56m
$329
SeattlePhiladelphia
SEA - PHL
SEAPHL
Seattle/Tacoma Intl
Thu 10/1
9:50 pm-6:05 am
Nonstop5h 15m
Philadelphia
Mon 10/5
7:05 am-10:04 am
Nonstop5h 59m
$329
SeattlePhiladelphia
SEA - PHL
SEAPHL
Seattle/Tacoma Intl
Wed 5/27
7:30 am-8:49 pm
1 stop10h 19m
Philadelphia
Fri 5/29
7:10 am-10:00 am
Nonstop5h 50m
$339
SeattlePhiladelphia
SEA - PHL
SEAPHL
Seattle/Tacoma Intl
Fri 7/31
9:20 pm-5:29 am
Nonstop5h 09m
Philadelphia
Thu 8/6
7:00 pm-11:59 pm
1 stop7h 59m
$339
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Washington to Delaware
Have a flexible travel schedule? Discover the best time to fly to Delaware from Washington with our price prediction graph.
GEG-PHL
PDX-PHL
SEA-PHL
PSC-PHL
SEA-SBY
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 Washington to Delaware
USWA-USDE
GEG-PHL
PDX-PHL
SEA-PHL
PSC-PHL
No data available for this route at this time. Please check back soon.
Related info for your journey
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