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

For as low as $297, Alaska Airlines can have you in Delaware from State of Washington in 5h 09m. 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.

In terms of precipitation, rainfall in Delaware ranges from 2.9 - 4.3 inches per month. July is typically the wettest month, when rainfall can reach 4.3 in. February is typically the driest time to visit Delaware when rainfall is around 2.9 in.

If weather is an important factor for your trip to Delaware, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 77.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

What is the cheapest time of day to fly from WA to DE?

When flying from State of Washington to Delaware, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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.

$90+ Flights from Washington to Delaware

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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 December 14, 2025.

Thu 12/2511:07 pmSEA - PHL

Nonstop5h 01mAmerican Airlines

Sat 1/106:50 pmPHL - SEA

Nonstop6h 17mAmerican Airlines

Deal found 12/13

$277

Thu 12/2512:47 pmPDX - PHL

1 stop13h 44mFrontier

Tue 12/307:10 amPHL - PDX

1 stop9h 14mFrontier

Deal found 12/13

$337

Thu 12/255:02 amSEA - PHL

2 stops9h 26mUnited Airlines

Sat 1/106:30 amPHL - SEA

2 stops10h 28mUnited Airlines

Deal found 12/13

$342

Tue 12/302:29 pmPDX - PHL

1 stop12h 11mFrontier

Sat 1/38:36 pmPHL - PDX

1 stop18h 07mFrontier

Deal found 12/12

$354

Fri 12/262:54 pmSEA - PHL

1 stop11h 37mFrontier

Sun 1/48:36 pmPHL - SEA

1 stop18h 54mFrontier

Deal found 12/12

$358

Tue 12/232:29 pmPDX - PHL

1 stop12h 11mFrontier

Tue 12/307:10 amPHL - PDX

1 stop9h 14mFrontier

Deal found 12/14

$363

Fri 12/262:54 pmSEA - PHL

1 stop11h 37mMultiple Airlines

Sat 1/107:06 pmPHL - SEA

Nonstop6h 23mMultiple Airlines

Deal found 12/13

$365

Wed 12/316:02 pmPDX - PHL

1 stop14h 19mMultiple Airlines

Sat 1/103:53 pmPHL - PDX

2 stops22h 22mMultiple Airlines

Deal found 12/13

$377

Thu 12/251:25 pmSEA - PHL

1 stop13h 06mFrontier

Thu 1/18:36 pmPHL - SEA

1 stop18h 54mFrontier

Deal found 12/12

$378

Thu 12/2512:47 pmPDX - PHL

1 stop13h 44mFrontier

Thu 1/17:10 amPHL - PDX

1 stop9h 14mFrontier

Deal found 12/14

$387

Wed 12/3110:50 amPDX - PHL

1 stop9h 00mSouthwest

Sat 1/102:05 pmPHL - PDX

1 stop9h 25mSouthwest

Deal found 12/13

$411

Tue 12/232:29 pmPDX - PHL

1 stop12h 11mFrontier

Thu 1/17:10 amPHL - PDX

1 stop9h 14mFrontier

Deal found 12/12

$413

Best flights from Washington to Delaware
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 December 14, 2025.

Wed 1/289:54 amSEA - PHL

Nonstop5h 09mAlaska Airlines

Thu 1/297:06 pmPHL - SEA

Nonstop6h 23mAlaska Airlines

Deal found 12/13

$297

Thu 1/811:12 pmSEA - PHL

1 stop9h 01mAmerican Airlines

Wed 1/146:50 pmPHL - SEA

Nonstop6h 17mAmerican Airlines

Deal found 12/13

$297

Wed 2/251:38 pmSEA - PHL

1 stop7h 08mDelta

Sun 3/16:50 pmPHL - SEA

1 stop8h 19mDelta

Deal found 12/11

$297

Wed 2/256:05 amSEA - PHL

2 stops11h 15mSouthwest

Mon 3/21:15 pmPHL - SEA

2 stops13h 00mSouthwest

Deal found 12/12

$307

Thu 1/81:19 pmGEG - PHL

1 stop19h 27mMultiple Airlines

Wed 1/141:40 pmPHL - GEG

2 stops33h 28mMultiple Airlines

Deal found 12/14

$315

Fri 1/98:10 amSEA - PHL

1 stop7h 44mUnited Airlines

Mon 1/125:00 pmPHL - SEA

1 stop8h 43mUnited Airlines

Deal found 12/11

$357

Thu 2/2611:20 amSEA - PHL

1 stop9h 26mDelta

Sun 3/16:50 pmPHL - SEA

1 stop8h 19mDelta

Deal found 12/12

$297

Wed 2/117:10 amPDX - PHL

1 stop7h 53mAlaska Airlines

Tue 2/176:20 pmPHL - PDX

1 stop19h 26mAlaska Airlines

Deal found 12/11

$325

Wed 1/286:05 amSEA - PHL

2 stops11h 15mSouthwest

Fri 1/305:40 amPHL - SEA

2 stops13h 20mSouthwest

Deal found 12/13

$327

Wed 2/117:10 amPDX - PHL

1 stop7h 53mAlaska Airlines

Wed 2/186:20 pmPHL - PDX

1 stop8h 24mAlaska Airlines

Deal found 12/11

$325

Sat 1/1712:25 pmSEA - PHL

1 stop8h 05mUnited Airlines

Tue 1/2010:30 amPHL - SEA

2 stops10h 44mUnited Airlines

Deal found 12/14

$360

Wed 1/147:37 pmPDX - PHL

2 stops10h 13mDelta

Wed 1/2112:16 pmPHL - PDX

2 stops11h 43mDelta

Deal found 12/14

$336

Sat 2/75:15 amSEA - PHL

2 stops11h 40mSouthwest

Sat 2/142:00 pmPHL - SEA

2 stops11h 50mSouthwest

Deal found 12/13

$341

Wed 2/257:06 pmGEG - PHL

1 stop19h 14mAlaska Airlines

Wed 3/46:20 pmPHL - GEG

1 stop8h 39mAlaska Airlines

Deal found 12/13

$325

Tue 2/105:10 pmSEA - PHL

2 stops15h 57mUnited Airlines

Sat 2/146:20 pmPHL - SEA

1 stop9h 39mUnited Airlines

Deal found 12/13

$361

Fri 1/911:10 amPDX - PHL

2 stops9h 03mDelta

Wed 1/1411:27 amPHL - PDX

2 stops12h 32mDelta

Deal found 12/13

$336

Wed 2/257:06 pmGEG - PHL

1 stop19h 14mAlaska Airlines

Tue 3/36:20 pmPHL - GEG

1 stop8h 39mAlaska Airlines

Deal found 12/14

$325

Wed 1/147:10 amPDX - PHL

2 stops13h 46mDelta

Tue 1/207:00 amPHL - PDX

2 stops14h 50mDelta

Deal found 12/12

$336

Wed 2/1812:44 pmPSC - PHL

1 stop7h 46mUnited Airlines

Wed 2/253:37 pmPHL - PSC

1 stop8h 13mUnited Airlines

Deal found 12/11

$373

Fri 2/271:23 pmGEG - PHL

1 stop24h 57mAlaska Airlines

Wed 3/46:20 pmPHL - GEG

1 stop21h 09mAlaska Airlines

Deal found 12/12

$325

Fri 2/275:00 amGEG - PHL

2 stops11h 25mDelta

Wed 3/412:29 pmPHL - GEG

2 stops11h 27mDelta

Deal found 12/12

$336

Wed 2/259:20 amGEG - PHL

2 stops11h 26mDelta

Tue 3/312:29 pmPHL - GEG

2 stops14h 35mDelta

Deal found 12/14

$336

Fri 3/67:05 amPDX - PHL

1 stop7h 15mAlaska Airlines

Wed 3/116:22 pmPHL - PDX

1 stop17h 27mAlaska Airlines

Deal found 12/12

$344

Thu 1/86:05 amGEG - PHL

2 stops14h 09mDelta

Wed 1/1411:27 amPHL - GEG

2 stops12h 31mDelta

Deal found 12/14

$336

Sat 3/77:05 amPDX - PHL

1 stop7h 15mAlaska Airlines

Tue 3/106:22 pmPHL - PDX

1 stop19h 24mAlaska Airlines

Deal found 12/13

$344

Wed 2/2511:20 amGEG - PHL

2 stops9h 26mDelta

Wed 3/412:29 pmPHL - GEG

2 stops13h 21mDelta

Deal found 12/13

$336

Mon 1/1212:45 pmPSC - PHL

1 stop7h 45mUnited Airlines

Thu 1/1510:10 amPHL - PSC

2 stops14h 00mUnited Airlines

Deal found 12/11

$503

Mon 1/55:10 amPDX - PHL

1 stop21h 27mAlaska Airlines

Mon 1/127:06 pmPHL - PDX

1 stop20h 32mAlaska Airlines

Deal found 12/14

$345

Mon 1/127:20 amGEG - PHL

2 stops13h 36mDelta

Mon 1/195:17 pmPHL - GEG

2 stops9h 42mDelta

Deal found 12/13

$336

Tue 1/209:10 amPDX - PHL

1 stop29h 53mAlaska Airlines

Sun 1/257:06 pmPHL - PDX

1 stop17h 23mAlaska Airlines

Deal found 12/14

$345

Last-minute flights from Washington to Delaware
Discover last-minute flight deals from Washington to Delaware. Data last updated December 14, 2025 and is based on user searches.

Thu 1/16:00 amSEA - PHL

1 stop9h 08mAmerican Airlines

Wed 1/76:50 pmPHL - SEA

Nonstop6h 17mAmerican Airlines

Deal found 12/12

$296

Mon 1/52:54 pmSEA - PHL

1 stop11h 37mMultiple Airlines

Thu 1/87:06 pmPHL - SEA

Nonstop6h 23mMultiple Airlines

Deal found 12/13

$276

Mon 1/511:07 pmSEA - PHL

Nonstop5h 01mAmerican Airlines

Sun 1/114:50 pmPHL - SEA

1 stop8h 30mAmerican Airlines

Deal found 12/12

$299

Mon 1/52:54 pmSEA - PHL

1 stop11h 37mFrontier

Sun 1/116:01 pmPHL - SEA

2 stops28h 46mFrontier

Deal found 12/12

$316

Mon 1/511:15 pmSEA - PHL

1 stop7h 22mUnited Airlines

Sun 1/115:00 pmPHL - SEA

1 stop8h 43mUnited Airlines

Deal found 12/13

$317

Thu 1/81:19 pmGEG - PHL

1 stop19h 27mMultiple Airlines

Wed 1/141:40 pmPHL - GEG

2 stops33h 28mMultiple Airlines

Deal found 12/14

$315

Fri 1/96:05 amSEA - PHL

1 stop7h 23mDelta

Fri 1/162:31 pmPHL - SEA

1 stop11h 19mDelta

Deal found 12/14

$297

Sat 1/106:12 amSEA - PHL

Nonstop5h 05mAmerican Airlines

Sat 1/1712:28 pmPHL - SEA

1 stop12h 22mAmerican Airlines

Deal found 12/14

$271

Sat 1/1012:25 pmSEA - PHL

1 stop8h 05mUnited Airlines

Sat 1/1710:10 amPHL - SEA

1 stop11h 04mUnited Airlines

Deal found 12/13

$282

Sat 1/176:12 amSEA - PHL

Nonstop5h 05mAmerican Airlines

Tue 1/205:00 amPHL - SEA

1 stop11h 04mAmerican Airlines

Deal found 12/14

$295

Mon 1/196:12 amSEA - PHL

Nonstop5h 05mAmerican Airlines

Thu 1/226:50 pmPHL - SEA

Nonstop6h 17mAmerican Airlines

Deal found 12/14

$277

Fri 1/307:00 amSEA - PHL

1 stop7h 34mUnited Airlines

Mon 2/21:10 pmPHL - SEA

2 stops11h 05mUnited Airlines

Deal found 12/13

$288

One-way flights from Washington to Delaware
Search for one-way flight options from Washington to Delaware. Find affordable one-way fares based on user searches. Data last updated December 14, 2025.

Mon 2/99:22 pmPDX - PHL

2 stops34h 02mFrontier

Deal found 12/12

$90

Thu 1/812:05 pmPDX - PHL

1 stop20h 41mFrontier

Deal found 12/11

$97

Mon 3/912:04 pmPDX - PHL

1 stop14h 27mFrontier

Deal found 12/12

$98

Fri 1/1611:59 amPDX - PHL

2 stops19h 47mFrontier

Deal found 12/12

$99

Sun 2/226:58 pmPDX - PHL

2 stops16h 37mMultiple Airlines

Deal found 12/13

$108

Sun 3/16:56 pmPDX - PHL

2 stops20h 15mMultiple Airlines

Deal found 12/13

$112

Mon 1/1911:29 amPDX - PHL

2 stops34h 13mFrontier

Deal found 12/13

$116

Thu 1/1511:59 amPDX - PHL

1 stop25h 33mFrontier

Deal found 12/12

$118

Thu 3/1212:04 pmPDX - PHL

1 stop14h 27mFrontier

Deal found 12/12

$119

Thu 12/2512:47 pmPDX - PHL

1 stop13h 44mFrontier

Deal found 12/12

$122

Thu 1/11:25 pmSEA - PHL

1 stop13h 06mFrontier

Deal found 12/14

$123

Mon 1/52:54 pmSEA - PHL

2 stops41h 19mFrontier

Deal found 12/12

$125

Find flight deals from Washington to Delaware

Most accurate provider	eDreams 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$270 (Kiwi.com)
One-way from	$90 (Kiwi.com)
Popular in	December
Cheapest in	October
Average price	$646

Provider with most accurate pricing for Seattle/Tacoma Intl-Philadelphia flight deals.

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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 ($38 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 4% potential price decrease ($20 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in December 2025

Search Deals

Cheapflights Fare Finder

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

Price

SeattlePhiladelphia

SEA - PHL

SEAPHL

Seattle/Tacoma Intl

Wed 1/28

9:54 am-6:03 pm

Nonstop5h 09m

Philadelphia

Thu 1/29

7:06 pm-10:29 pm

Nonstop6h 23m

$297

SeattlePhiladelphia

SEA - PHL

SEAPHL

Seattle/Tacoma Intl

Thu 1/8

11:12 pm-11:13 am

1 stop9h 01m

Philadelphia

Wed 1/14

6:50 pm-10:07 pm

Nonstop6h 17m

$297

SeattlePhiladelphia

SEA - PHL

SEAPHL

Seattle/Tacoma Intl

Wed 2/25

1:38 pm-11:46 pm

1 stop7h 08m

Philadelphia

Sun 3/1

6:50 pm-12:09 am

1 stop8h 19m

$297

SeattlePhiladelphia

SEA - PHL

SEAPHL

Seattle/Tacoma Intl

Thu 2/26

11:20 am-11:46 pm

1 stop9h 26m

Philadelphia

Sun 3/1

6:50 pm-12:09 am

1 stop8h 19m

$297

SeattlePhiladelphia

SEA - PHL

SEAPHL

Seattle/Tacoma Intl

Wed 2/25

6:05 am-8:20 pm

2 stops11h 15m

Philadelphia

Mon 3/2

1:15 pm-11:15 pm

2 stops13h 00m

$307

SpokanePhiladelphia

GEG - PHL

GEGPHL

Spokane

Thu 1/8

1:19 pm-11:46 am

1 stop19h 27m

Philadelphia

Wed 1/14

1:40 pm-8:08 pm

2 stops33h 28m

$315

PortlandPhiladelphia

PDX - PHL

PDXPHL

Portland

Wed 2/11

7:10 am-6:03 pm

1 stop7h 53m

Philadelphia

Tue 2/17

6:20 pm-10:46 am

1 stop19h 26m

$325

PortlandPhiladelphia

PDX - PHL

PDXPHL

Portland

Wed 2/11

7:10 am-6:03 pm

1 stop7h 53m

Philadelphia

Wed 2/18

6:20 pm-11:44 pm

1 stop8h 24m

$325

SpokanePhiladelphia

GEG - PHL

GEGPHL

Spokane

Wed 2/25

7:06 pm-5:20 pm

1 stop19h 14m

Philadelphia

Wed 3/4

6:20 pm-11:59 pm

1 stop8h 39m

$325

SpokanePhiladelphia

GEG - PHL

GEGPHL

Spokane

Wed 2/25

7:06 pm-5:20 pm

1 stop19h 14m

Philadelphia

Tue 3/3

6:20 pm-11:59 pm

1 stop8h 39m

$325

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/13

Showing 1-10 of 60 results

...

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

How long is the flight from State of Washington to Delaware?
For as low as $297, Alaska Airlines can have you in Delaware from State of Washington in 5h 09m. 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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$90+ 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 2/9. Fares are subject to change and may not be available on all flights or dates of travel.

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Cheap flight deals from Washington to Delaware

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 December 14, 2025.

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 December 14, 2025.

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 December 14, 2025.

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

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

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.

Cheapflights Insights

Everything you need to know about your flight from Washington to Delaware

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?

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

How can I find direct flights from Washington to Delaware?

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

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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 December 14, 2025.