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$103+ 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 12/10. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — SEA
Dec 18 — Dec 251
Thu 12/18
Thu 12/25
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 18, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$257
(Alaska Airlines)

One-way from

$103
(Kiwi.com)

Popular in

June

Cheapest in

October

Average price

$418

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. 12% potential increase in price ($58 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% 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 18, 2025.

This Alaska Airlines deal was found by Cheapflights users on 11/16. 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.
Thu 12/117:06 amPHL - SEA
Nonstop6h 14mAlaska Airlines
Mon 12/159:35 pmSEA - PHL
Nonstop5h 11mAlaska Airlines
Deal found 11/16$257
This Kiwi.com deal was found by Cheapflights users on 11/17. 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 12/174:00 pmPHL - SEA
2 stops23h 30mFrontier
Mon 1/52:54 pmSEA - PHL
1 stop11h 37mFrontier
Deal found 11/17$258
This Kiwi.com deal was found by Cheapflights users on 11/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/118:00 amPHL - SEA
2 stops29h 06mMultiple Airlines
Mon 12/153:40 pmSEA - PHL
1 stop10h 51mMultiple Airlines
Deal found 11/16$260
This Kiwi.com deal was found by Cheapflights users on 11/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/410:00 pmPHL - SEA
2 stops40h 53mFrontier
Mon 12/83:40 pmSEA - PHL
1 stop10h 51mFrontier
Deal found 11/16$261
This Kiwi.com deal was found by Cheapflights users on 11/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/188:36 pmPHL - SEA
2 stops25h 17mFrontier
Sun 1/1112:26 pmSEA - PHL
1 stop20h 29mFrontier
Deal found 11/16$264
This Kiwi.com deal was found by Cheapflights users on 11/17. 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 12/188:36 pmPHL - SEA
2 stops41h 55mFrontier
Mon 1/52:54 pmSEA - PHL
1 stop11h 37mFrontier
Deal found 11/17$268
This Kiwi.com deal was found by Cheapflights users on 11/17. 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 12/114:12 pmPHL - SEA
1 stop19h 34mFrontier
Sun 12/1412:48 pmSEA - PHL
1 stop13h 43mFrontier
Deal found 11/17$270
This Kiwi.com deal was found by Cheapflights users on 11/17. 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
1 stop19h 34mFrontier
Sun 12/1412:48 pmSEA - PHL
1 stop13h 43mFrontier
Deal found 11/17$272
This Kiwi.com deal was found by Cheapflights users on 11/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/127:11 pmPHL - SEA
2 stops19h 42mFrontier
Mon 12/153:40 pmSEA - PHL
1 stop10h 51mFrontier
Deal found 11/16$273
This Delta deal was found by Cheapflights users on 11/16. 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 12/1311:46 amPHL - SEA
1 stop8h 14mDelta
Mon 1/1211:10 pmSEA - PHL
1 stop9h 43mDelta
Deal found 11/16$277
This Kiwi.com deal was found by Cheapflights users on 11/17. 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 12/58:36 pmPHL - SEA
1 stop18h 17mFrontier
Thu 12/181:25 pmSEA - PHL
2 stops18h 06mFrontier
Deal found 11/17$278
This Kiwi.com deal was found by Cheapflights users on 11/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/1812:37 pmPHL - SEA
1 stop7h 41mMultiple Airlines
Fri 1/912:26 pmSEA - PHL
2 stops17h 31mMultiple Airlines
Deal found 11/16$279

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 18, 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

Tue 12/9

6:54 pm-10:12 pm

Nonstop6h 18m

Seattle/Tacoma Intl

Sun 12/14

9:35 pm-5:46 am

Nonstop5h 11m

$257

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Thu 12/11

7:06 am-10:20 am

Nonstop6h 14m

Seattle/Tacoma Intl

Sat 12/13

9:35 pm-5:46 am

Nonstop5h 11m

$257

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Tue 12/9

6:54 pm-10:12 pm

Nonstop6h 18m

Seattle/Tacoma Intl

Tue 12/16

9:35 pm-5:46 am

Nonstop5h 11m

$257

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Wed 12/10

7:06 am-10:20 am

Nonstop6h 14m

Seattle/Tacoma Intl

Mon 12/15

9:35 pm-5:46 am

Nonstop5h 11m

$257

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Thu 12/11

7:06 am-10:20 am

Nonstop6h 14m

Seattle/Tacoma Intl

Sun 12/14

9:35 pm-5:46 am

Nonstop5h 11m

$257

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Thu 1/15

5:00 pm-10:43 pm

1 stop8h 43m

Seattle/Tacoma Intl

Sun 1/18

9:25 am-9:52 pm

1 stop9h 27m

$272

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Wed 12/10

6:00 am-10:40 am

1 stop7h 40m

Seattle/Tacoma Intl

Sat 12/13

11:55 pm-10:51 am

1 stop7h 56m

$277

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Tue 12/9

6:55 am-2:35 pm

1 stop10h 40m

Seattle/Tacoma Intl

Tue 12/16

6:00 am-5:02 pm

1 stop8h 02m

$277

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Mon 1/12

8:35 am-3:44 pm

1 stop10h 09m

Seattle/Tacoma Intl

Thu 1/22

8:10 am-6:54 pm

1 stop7h 44m

$277

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Tue 2/3

5:40 am-12:20 pm

1 stop9h 40m

Seattle/Tacoma Intl

Tue 2/10

10:59 pm-11:11 am

1 stop9h 12m

$277

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/18

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 $148). 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 18, 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.

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 18, 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
11,316 reviews

Food

7.1

Overall

8.0

Comfort

7.8

Boarding

8.1

Crew

8.5

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Marcie,Nov 2025

PIT - SEA

It was not a full flight, so I was able to enjoy a row to myself. Luck of the draw, I guess.
Alaska Airlines
8.0
Very good
11,316 reviews
Alaska Airlines
8.0
Very good
11,316 reviews

Food

7.1

Overall

8.0

Comfort

7.8

Boarding

8.1

Crew

8.5

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Marcie,Nov 2025

PIT - SEA

It was not a full flight, so I was able to enjoy a row to myself. Luck of the draw, I guess.
Delta
7.9
Good
8,007 reviews
Alaska Airlines
8.0
Very good
11,316 reviews

Food

7.1

Overall

8.0

Comfort

7.8

Boarding

8.1

Crew

8.5

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Marcie,Nov 2025

PIT - SEA

It was not a full flight, so I was able to enjoy a row to myself. Luck of the draw, I guess.
Hawaiian Airlines
7.8
Good
2,809 reviews
Alaska Airlines
8.0
Very good
11,316 reviews

Food

7.1

Overall

8.0

Comfort

7.8

Boarding

8.1

Crew

8.5

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Marcie,Nov 2025

PIT - SEA

It was not a full flight, so I was able to enjoy a row to myself. Luck of the draw, I guess.
American Airlines
7.2
Good
11,047 reviews
Alaska Airlines
8.0
Very good
11,316 reviews

Food

7.1

Overall

8.0

Comfort

7.8

Boarding

8.1

Crew

8.5

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Marcie,Nov 2025

PIT - SEA

It was not a full flight, so I was able to enjoy a row to myself. Luck of the draw, I guess.
Frontier
5.8
Fair
3,103 reviews
Alaska Airlines
8.0
Very good
11,316 reviews

Food

7.1

Overall

8.0

Comfort

7.8

Boarding

8.1

Crew

8.5

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Marcie,Nov 2025

PIT - SEA

It was not a full flight, so I was able to enjoy a row to myself. Luck of the draw, I guess.

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 Alaska Airlines, Delta, and United Airlines fly from Philadelphia to State of Washington in about 6h 18m. The time it takes to get you to your destination can typically vary by up to 7h 25m. 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 $103 on Frontier. Other airlines that offer cheap prices include Alaska Airlines from $144 and United 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 American Airlines (80%), Air Tahiti Nui (78%) or Alaska Airlines (70%) 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 $148). 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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See prices for flight routes from nearby airports that may be better suited for you.
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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 18, 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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