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Delaware

$97+ 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 1/8. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — ILG
ene. 7 — ene. 141
mié. 1/7
mié. 1/14
1 adult, Economy
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Cheap flight deals from Washington to Delaware

Cheapest flights from Washington to Delaware
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 diciembre 8, 2025.

This Booking.com deal was found by Cheapflights users on 12/6. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 12/1412:08 pmGEG - PHL
1 stop14h 23mFrontier
vie. 1/28:36 pmPHL - GEG
1 stop17h 31mFrontier
Deal found 12/6$275
This Trip.com deal was found by Cheapflights users on 12/8. 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.
dom. 12/1412:48 pmSEA - PHL
1 stop13h 43mFrontier
sáb. 12/208:36 pmPHL - SEA
1 stop18h 54mFrontier
Deal found 12/8$284
This Travelocity deal was found by Cheapflights users on 12/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/159:45 amSEA - PHL
1 stop11h 49mMultiple Airlines
sáb. 2/146:20 pmPHL - SEA
Nonstop6h 13mMultiple Airlines
Deal found 12/5$291
This Frontier deal was found by Cheapflights users on 12/7. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 12/2112:47 pmPDX - PHL
1 stop13h 44mFrontier
jue. 1/17:10 amPHL - PDX
1 stop9h 14mFrontier
Deal found 12/7$318
This Booking.com deal was found by Cheapflights users on 12/6. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/251:25 pmSEA - PHL
1 stop13h 06mFrontier
dom. 1/48:36 pmPHL - SEA
1 stop18h 54mFrontier
Deal found 12/6$321
This Booking.com deal was found by Cheapflights users on 12/8. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/312:46 pmSEA - PHL
1 stop11h 54mFrontier
dom. 1/48:36 pmPHL - SEA
1 stop18h 54mFrontier
Deal found 12/8$347
This American Airlines deal was found by Cheapflights users on 12/8. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/3111:07 pmSEA - PHL
Nonstop5h 01mAmerican Airlines
lun. 1/57:15 amPHL - SEA
1 stop9h 56mAmerican Airlines
Deal found 12/8$357
This Booking.com deal was found by Cheapflights users on 12/6. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/292:54 pmSEA - PHL
1 stop11h 37mFrontier
dom. 1/48:36 pmPHL - SEA
1 stop18h 54mFrontier
Deal found 12/6$368
This Gotogate deal was found by Cheapflights users on 12/6. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 12/1412:48 pmSEA - PHL
1 stop13h 43mFrontier
dom. 1/48:36 pmPHL - SEA
1 stop18h 54mFrontier
Deal found 12/6$377
This United Airlines deal was found by Cheapflights users on 12/8. 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.
mié. 12/317:12 pmSEA - PHL
1 stop8h 57mUnited Airlines
lun. 1/56:35 amPHL - SEA
1 stop8h 28mUnited Airlines
Deal found 12/8$380
This Frontier deal was found by Cheapflights users on 12/7. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/302:29 pmPDX - PHL
1 stop12h 11mFrontier
jue. 1/17:10 amPHL - PDX
1 stop9h 14mFrontier
Deal found 12/7$383
This Travelocity deal was found by Cheapflights users on 12/7. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 12/129:45 amSEA - PHL
1 stop11h 49mMultiple Airlines
vie. 3/207:00 amPHL - SEA
Nonstop5h 57mMultiple Airlines
Deal found 12/7$385

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 diciembre 8, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$262
(United Airlines)

One-way from

$97
(Mytrip)

Popular in

December

Cheapest in

October

Average price

$636
Provider with most accurate pricing for Seattle/Tacoma Intl-Philadelphia flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Philadelphia flights.
Search Deals
From Washington to Delaware
Search Deals
One-way flight from Washington to Delaware
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($42 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($19 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

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 diciembre 8, 2025.
Use the filters below to find and compare flights from Washington to Delaware that are best for you.

Fly from

Washington

Fly to

Delaware

Route

Depart

Return

Price

SeattlePhiladelphia

SEA - PHL

SEAPHL

Seattle/Tacoma Intl

sáb. 1/10

7:00 am-5:34 pm

1 stop7h 34m

Philadelphia

sáb. 1/17

10:30 am-6:28 pm

2 stops10h 58m

$262

SeattlePhiladelphia

SEA - PHL

SEAPHL

Seattle/Tacoma Intl

dom. 1/18

11:10 pm-8:50 am

1 stop6h 40m

Philadelphia

mié. 1/21

4:59 pm-11:15 pm

1 stop9h 16m

$267

SeattlePhiladelphia

SEA - PHL

SEAPHL

Seattle/Tacoma Intl

sáb. 1/17

5:00 am-5:34 pm

2 stops9h 34m

Philadelphia

mar. 1/20

10:30 am-6:14 pm

2 stops10h 44m

$267

SpokanePhiladelphia

GEG - PHL

GEGPHL

Spokane

mié. 2/25

7:05 am-10:00 pm

2 stops11h 55m

Philadelphia

mié. 3/4

5:00 pm-9:45 pm

1 stop7h 45m

$306

SpokanePhiladelphia

GEG - PHL

GEGPHL

Spokane

mar. 2/24

9:20 am-11:46 pm

2 stops11h 26m

Philadelphia

mié. 3/4

5:31 am-11:35 am

1 stop9h 04m

$306

SpokanePhiladelphia

GEG - PHL

GEGPHL

Spokane

mar. 2/24

6:30 am-5:57 pm

1 stop8h 27m

Philadelphia

lun. 3/2

6:50 pm-8:37 am

2 stops16h 47m

$318

SpokanePhiladelphia

GEG - PHL

GEGPHL

Spokane

lun. 2/23

9:20 am-8:50 am

2 stops20h 30m

Philadelphia

mar. 3/3

6:50 pm-11:54 pm

1 stop8h 04m

$318

SpokanePhiladelphia

GEG - PHL

GEGPHL

Spokane

lun. 2/23

9:20 am-8:50 am

2 stops20h 30m

Philadelphia

mié. 3/4

6:50 pm-11:54 pm

1 stop8h 04m

$318

SpokanePhiladelphia

GEG - PHL

GEGPHL

Spokane

vie. 2/27

5:00 am-11:44 pm

2 stops15h 44m

Philadelphia

mié. 3/4

5:31 am-11:35 am

1 stop9h 04m

$318

SpokanePhiladelphia

GEG - PHL

GEGPHL

Spokane

mar. 2/24

7:05 am-5:20 pm

1 stop7h 15m

Philadelphia

lun. 3/2

6:20 pm-11:59 pm

1 stop8h 39m

$319

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/5

Showing 1-10 of 60 results
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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.
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
No data available for this route at this time. Please check back soon.

Related info for your journey

Find useful and relevant information for your journey from Washington to Delaware. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from State of Washington to Delaware?

    For as low as $267, United Airlines can have you in Delaware from State of Washington in 6h 40m. The distance between State of Washington and Delaware is about 2370 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • Can I find deals for flights from Washington to Delaware that include hotel bookings?

    Yes. In addition to deals on Washington to Delaware flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Washington to Delaware?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington to Delaware.

  • Can I find deals for business class flights from Washington to Delaware?

    Yes. Cheapflights offers flight deals from Washington to Delaware by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

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Alternative routes for Washington to Delaware

See prices for flight routes from nearby airports that may be better suited for you.
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