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$78+ 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 11/22. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — SEA
Dec 6 — Dec 131
Sat 12/6
Sat 12/13
1 adult, Economy
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Cheap flight deals from Philadelphia to Washington

Keep the following information in mind while searching for Philadelphia to Washington flight deals. Data was last updated November 6, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$257
(Kiwi.com)

One-way from

$78
(Frontier)

Popular in

June

Cheapest in

October

Average price

$427

Good round-trip deal

$365 or less

Good one-way deal

$216 or less
Provider with most accurate pricing for Philadelphia-Seattle/Tacoma Intl flight deals.
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Provider most trusted by Cheapflights users for Philadelphia-Seattle/Tacoma Intl flights.
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From Philadelphia to Washington
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One-way flight from Philadelphia to Washington
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Highest demand for flights based on searches. 11% potential increase in price ($54 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($9 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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Price to beat on a round-trip flight from Philadelphia to Washington.
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Price to beat on a one-way flight from Philadelphia to Washington.
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Find flight deals from Philadelphia to Washington

Cheapest flights from Philadelphia to Washington
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 November 6, 2025.

This Kiwi.com deal was found by Cheapflights users on 11/3. 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.
Thu 12/44:12 pmPHL - SEA
2 stops22h 41mFrontier
Mon 12/89:45 amSEA - PHL
1 stop11h 49mFrontier
Deal found 11/3$257
This Kiwi.com deal was found by Cheapflights users on 11/4. 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 11/219:48 amPHL - SEA
1 stop30h 34mMultiple Airlines
Mon 11/249:53 pmSEA - PHL
2 stops23h 46mMultiple Airlines
Deal found 11/4$259
This United Airlines deal was found by Cheapflights users on 11/3. 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 12/412:45 pmPHL - SEA
1 stop9h 37mUnited Airlines
Sat 12/137:00 amSEA - PHL
1 stop7h 39mUnited Airlines
Deal found 11/3$262
This Delta deal was found by Cheapflights users on 11/4. 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 12/46:07 pmPHL - SEA
1 stop8h 52mDelta
Wed 12/101:45 pmSEA - PHL
1 stop7h 12mDelta
Deal found 11/4$267
This Frontier deal was found by Cheapflights users on 11/4. 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.
Mon 11/246:00 amPHL - SEA
1 stop8h 56mFrontier
Mon 12/19:07 amSEA - PHL
1 stop11h 52mFrontier
Deal found 11/4$268
This CheapOair deal was found by Cheapflights users on 11/3. 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.
Thu 11/136:19 amPHL - SEA
1 stop8h 54mFrontier
Thu 11/201:01 pmSEA - PHL
1 stop12h 44mFrontier
Deal found 11/3$272
This Frontier deal was found by Cheapflights users on 11/4. 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.
Thu 11/206:00 amPHL - SEA
1 stop8h 56mFrontier
Mon 1/56:33 pmSEA - PHL
1 stop8h 07mFrontier
Deal found 11/4$276
This American Airlines deal was found by Cheapflights users on 11/5. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/96:35 pmPHL - SEA
Nonstop6h 15mAmerican Airlines
Fri 12/1210:58 pmSEA - PHL
Nonstop4h 55mAmerican Airlines
Deal found 11/5$287
This Frontier deal was found by Cheapflights users on 11/4. 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 11/226:00 amPHL - SEA
1 stop8h 56mFrontier
Mon 1/56:33 pmSEA - PHL
1 stop8h 07mFrontier
Deal found 11/4$296
This Southwest deal was found by Cheapflights users on 11/5. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/106:00 amPHL - SEA
2 stops13h 30mSouthwest
Wed 12/177:05 amSEA - PHL
2 stops10h 55mSouthwest
Deal found 11/5$297
This CheapOair deal was found by Cheapflights users on 11/4. 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 11/216:00 amPHL - SEA
1 stop8h 56mFrontier
Mon 11/241:01 pmSEA - PHL
1 stop12h 44mFrontier
Deal found 11/4$298
This American Airlines deal was found by Cheapflights users on 11/5. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/66:40 pmPHL - SEA
Nonstop6h 19mAmerican Airlines
Sat 12/612:38 amSEA - PHL
1 stop7h 52mAmerican Airlines
Deal found 11/5$301

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 November 6, 2025.
Use the filters below to find and compare flights from Philadelphia to Washington that are best for you.

Fly from

Philadelphia

Fly to

Washington

Route

Depart

Return

Price

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Fri 1/23

6:37 pm-12:09 am

1 stop8h 32m

Seattle/Tacoma Intl

Thu 1/29

1:38 pm-11:14 pm

1 stop6h 36m

$267

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Sat 12/6

12:37 pm-8:50 pm

1 stop11h 13m

Seattle/Tacoma Intl

Sun 12/7

2:03 pm-12:51 am

1 stop7h 48m

$267

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Fri 1/23

6:00 am-10:47 am

1 stop7h 47m

Seattle/Tacoma Intl

Mon 1/26

10:59 pm-9:50 am

1 stop7h 51m

$267

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Mon 12/8

6:07 pm-11:58 pm

1 stop8h 51m

Seattle/Tacoma Intl

Mon 12/15

11:15 pm-11:37 am

1 stop9h 22m

$267

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Mon 1/12

10:30 am-6:26 pm

2 stops10h 56m

Seattle/Tacoma Intl

Thu 1/22

10:58 am-9:51 pm

1 stop7h 53m

$272

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Wed 12/3

5:07 pm-10:28 pm

1 stop8h 21m

Seattle/Tacoma Intl

Wed 12/10

7:34 pm-9:35 am

2 stops11h 01m

$272

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Wed 1/28

12:15 pm-10:35 pm

2 stops13h 20m

Seattle/Tacoma Intl

Tue 2/3

6:25 am-10:00 pm

2 stops12h 35m

$277

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Mon 1/12

5:40 am-4:00 pm

2 stops13h 20m

Seattle/Tacoma Intl

Thu 1/22

6:05 am-8:20 pm

2 stops11h 15m

$301

PhiladelphiaPortland

PHL - PDX

PHLPDX

Philadelphia

Tue 12/16

7:06 am-1:50 pm

1 stop9h 44m

Portland

Sat 1/17

7:10 am-6:03 pm

1 stop7h 53m

$325

PhiladelphiaPortland

PHL - PDX

PHLPDX

Philadelphia

Mon 12/15

6:54 pm-9:32 am

1 stop17h 38m

Portland

Sat 1/17

7:10 am-6:03 pm

1 stop7h 53m

$325

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/4

Showing 1-10 of 60 results
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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.
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

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 $140). Flying from Philadelphia to State of Washington in April is currently the most expensive (average of $237). 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 November 6, 2025.

Unlike in the evening, when flights are generally more expensive, you can save up to 18% on flights from Philadelphia to State of Washington by exploring options for tickets in the afternoon.

What is the cheapest day to fly from Philadelphia to State of Washington?

Use this chart to determine the cheapest time to fly round-trip from Philadelphia to Washington. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Philadelphia to State of Washington flight should consider departing on Monday evenings when fares are most often at their lowest. Sunday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

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 November 6, 2025.

The most flights from PHL to USWA are scheduled on a Wednesday (9 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (5 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 November 6, 2025.
Read through reviews of airlines operating flights from Philadelphia to Washington, such as Alaska Airlines, Delta, and Hawaiian Airlines. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
11,246 reviews

Entertainment

7.0

Food

7.1

Comfort

7.8

Crew

8.5

Boarding

8.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
Alaska Airlines
8.0
Very good
11,246 reviews
Alaska Airlines
8.0
Very good
11,246 reviews

Entertainment

7.0

Food

7.1

Comfort

7.8

Crew

8.5

Boarding

8.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
Delta
7.9
Good
8,001 reviews
Alaska Airlines
8.0
Very good
11,246 reviews

Entertainment

7.0

Food

7.1

Comfort

7.8

Crew

8.5

Boarding

8.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
Hawaiian Airlines
7.8
Good
2,804 reviews
Alaska Airlines
8.0
Very good
11,246 reviews

Entertainment

7.0

Food

7.1

Comfort

7.8

Crew

8.5

Boarding

8.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
American Airlines
7.2
Good
11,040 reviews
Alaska Airlines
8.0
Very good
11,246 reviews

Entertainment

7.0

Food

7.1

Comfort

7.8

Crew

8.5

Boarding

8.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
Frontier
5.8
Fair
3,116 reviews
Alaska Airlines
8.0
Very good
11,246 reviews

Entertainment

7.0

Food

7.1

Comfort

7.8

Crew

8.5

Boarding

8.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why

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.

  • What airport do you fly from for flights from Philadelphia to Washington?

    If you book a flight to Washington from Philadelphia, you will be flying from Philadelphia, which is the city’s only airport. Philadelphia (PHL) is located 7.0 mi from the center of Philadelphia.

  • How popular is this Philadelphia to State of Washington flight route?

    This flight path from Philadelphia to Washington was viewed by 37 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

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

    Airlines like Delta, United Airlines, and Alaska Airlines fly from Philadelphia to State of Washington in about 8h 32m. The time it takes to get you to your destination can typically vary by up to 2h 24m. The distance from Philadelphia to State of Washington is about 2370 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines to fly from Philadelphia to State of Washington one-way?

    One-way options have recently been found by users for as low as $114 on Frontier. Other airlines that offer cheap prices include Alaska Airlines from $144 and American Airlines from $144 one-way.

  • What are the most popular routes from Philadelphia to State of Washington?

    Most travelers choose Philadelphia - Seattle/Tacoma Intl, Philadelphia - Portland or Philadelphia - Spokane when deciding on the best route from Philadelphia to State of Washington.

  • What are the most reliable airlines from Philadelphia to State of Washington?

    Consider Air Tahiti Nui (80%), Alaska Airlines (72%) or Hawaiian Airlines (72%) when booking your flight. These represent the most reliable airlines when flying from Philadelphia to State of Washington.

  • What are the cheapest flights from Philadelphia to State of Washington?

    Looking for the cheapest flight from Philadelphia to State of Washington? While on average our users pay $1,057, our data indicates the cheapest price to be $147. The most popular route (Philadelphia - Seattle/Tacoma Intl), is priced around $214.

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

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

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

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

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

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

  • 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 $140). Flying from Philadelphia to State of Washington in April is currently the most expensive (average of $237). 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.

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Top 9 airlines flying from Philadelphia to Washington

Discover the top 9 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 November 6, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$127Average$252FlexibilityNo cancel feeOn-time65%
FrontierCheapest$130Average$295FlexibilityNo cancel feeOn-time62%
DeltaCheapest$233Average$436FlexibilityNo cancel feeOn-timeN/A
Sun Country AirCheapest$238Average$361FlexibilityNo cancel feeOn-time83%
Hawaiian AirlinesCheapest$257Average$474FlexibilityNo cancel feeOn-time85%
Alaska AirlinesCheapest$277Average$540FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$277Average$446FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$286Average$498FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$294Average$464FlexibilityNo cancel feeOn-time63%

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