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$97+ 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 1/8. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — SEA
Jan 11 — Jan 181
Sun 1/11
Sun 1/18
1 adult, Economy
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Cheap 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 December 12, 2025.

This CheapOair deal was found by Cheapflights users on 12/10. 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.
Mon 12/227:10 amPHL - SEA
1 stop30h 01mFrontier
Wed 12/312:46 pmSEA - PHL
1 stop11h 54mFrontier
Deal found 12/10$299
This CheapOair deal was found by Cheapflights users on 12/11. 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 12/188:36 pmPHL - SEA
1 stop18h 54mFrontier
Thu 12/251:25 pmSEA - PHL
1 stop13h 06mFrontier
Deal found 12/11$305
This CheapOair deal was found by Cheapflights users on 12/11. 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 12/128:36 pmPHL - SEA
1 stop18h 17mFrontier
Mon 12/159:45 amSEA - PHL
1 stop11h 49mFrontier
Deal found 12/11$334
This CheapOair deal was found by Cheapflights users on 12/10. 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 12/197:10 amPHL - SEA
1 stop31h 21mFrontier
Mon 12/292:54 pmSEA - PHL
1 stop11h 37mFrontier
Deal found 12/10$354
This Frontier deal was found by Cheapflights users on 12/9. 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 12/217:10 amPHL - PDX
1 stop9h 14mFrontier
Thu 1/112:47 pmPDX - PHL
1 stop13h 44mFrontier
Deal found 12/9$367
This Kiwi.com deal was found by Cheapflights users on 12/10. 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 12/316:36 pmPHL - SEA
2 stops42h 35mFrontier
Mon 1/52:54 pmSEA - PHL
1 stop11h 37mFrontier
Deal found 12/10$381
This Booking.com deal was found by Cheapflights users on 12/10. 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.
Sat 12/207:10 amPHL - SEA
1 stop30h 01mFrontier
Sun 1/42:54 pmSEA - PHL
1 stop11h 37mFrontier
Deal found 12/10$382
This CheapOair deal was found by Cheapflights users on 12/10. 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 12/197:10 amPHL - SEA
1 stop31h 21mFrontier
Fri 1/22:54 pmSEA - PHL
1 stop11h 37mFrontier
Deal found 12/10$383
This CheapOair deal was found by Cheapflights users on 12/11. 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.
Sun 12/148:36 pmPHL - SEA
1 stop18h 17mFrontier
Thu 1/1512:19 pmSEA - PHL
1 stop25h 13mFrontier
Deal found 12/11$384
This Frontier deal was found by Cheapflights users on 12/11. 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.
Wed 12/247:10 amPHL - SEA
1 stop9h 41mFrontier
Thu 1/11:25 pmSEA - PHL
1 stop13h 06mFrontier
Deal found 12/11$387
This CheapOair deal was found by Cheapflights users on 12/11. 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 12/258:36 pmPHL - SEA
1 stop18h 54mFrontier
Thu 1/11:25 pmSEA - PHL
1 stop13h 06mFrontier
Deal found 12/11$388
This Southwest deal was found by Cheapflights users on 12/10. 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 12/1611:40 amPHL - PDX
1 stop10h 40mSouthwest
Tue 1/66:30 amPDX - PHL
1 stop7h 35mSouthwest
Deal found 12/10$393

Find flight deals from Philadelphia to Washington

Keep the following information in mind while searching for Philadelphia to Washington flight deals. Data was last updated December 12, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$257
(Delta)

One-way from

$97
(Kiwi.com)

Popular in

June

Cheapest in

October

Average price

$496

Good round-trip deal

$357 or less

Good one-way deal

$257 or less
Provider with most accurate pricing for Philadelphia-Seattle/Tacoma Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Philadelphia-Seattle/Tacoma Intl flights.
Search Deals
From Philadelphia to Washington
Search Deals
One-way flight from Philadelphia to Washington
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($61 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip flight from Philadelphia to Washington.
Search Deals
Price to beat on a one-way flight from Philadelphia to Washington.
Search Deals

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 December 12, 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

Thu 1/8

9:40 am-2:21 pm

1 stop7h 41m

Seattle/Tacoma Intl

Tue 1/13

1:38 pm-11:14 pm

1 stop6h 36m

$257

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Wed 2/4

5:40 am-2:18 pm

1 stop11h 38m

Seattle/Tacoma Intl

Mon 2/9

11:10 pm-8:50 am

1 stop6h 40m

$257

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Tue 2/17

6:50 pm-12:09 am

1 stop8h 19m

Seattle/Tacoma Intl

Sat 2/21

6:00 am-4:37 pm

1 stop7h 37m

$257

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Wed 2/18

5:17 pm-10:05 pm

1 stop7h 48m

Seattle/Tacoma Intl

Sat 2/21

6:00 am-4:37 pm

1 stop7h 37m

$257

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Fri 2/6

2:30 pm-11:15 pm

1 stop11h 45m

Seattle/Tacoma Intl

Tue 2/10

1:38 pm-11:53 pm

1 stop7h 15m

$257

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Sat 1/10

5:17 pm-9:49 pm

1 stop7h 32m

Seattle/Tacoma Intl

Sun 1/11

11:10 pm-8:50 am

1 stop6h 40m

$257

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Sat 2/7

5:19 pm-9:49 pm

1 stop7h 30m

Seattle/Tacoma Intl

Thu 2/12

12:00 pm-11:44 pm

1 stop8h 44m

$257

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Thu 3/5

7:00 am-2:44 pm

1 stop10h 44m

Seattle/Tacoma Intl

Fri 3/13

4:57 pm-5:41 am

1 stop9h 44m

$257

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Mon 1/12

5:17 pm-9:49 pm

1 stop7h 32m

Seattle/Tacoma Intl

Tue 1/20

1:38 pm-11:53 pm

1 stop7h 15m

$257

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Sat 1/10

10:30 am-6:14 pm

2 stops10h 44m

Seattle/Tacoma Intl

Sat 1/17

5:00 am-5:34 pm

2 stops9h 34m

$267

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/11

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 December 12, 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 December 12, 2025.

The most flights from PHL to USWA are scheduled on a Thursday (10 on average). You will have fewer flight options on Sunday, 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 December 12, 2025.
Read through reviews of airlines operating flights from Philadelphia to Washington, such as Alaska Airlines, Delta, and United 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
11,432 reviews

Entertainment

7.0

Overall

8.0

Comfort

7.8

Boarding

8.1

Crew

8.5

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.
Alaska Airlines
8.0
Very good
11,432 reviews
Alaska Airlines
8.0
Very good
11,432 reviews

Entertainment

7.0

Overall

8.0

Comfort

7.8

Boarding

8.1

Crew

8.5

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.
Delta
7.9
Good
8,007 reviews
Alaska Airlines
8.0
Very good
11,432 reviews

Entertainment

7.0

Overall

8.0

Comfort

7.8

Boarding

8.1

Crew

8.5

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.
United Airlines
7.4
Good
9,095 reviews
Alaska Airlines
8.0
Very good
11,432 reviews

Entertainment

7.0

Overall

8.0

Comfort

7.8

Boarding

8.1

Crew

8.5

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.
American Airlines
7.2
Good
11,050 reviews
Alaska Airlines
8.0
Very good
11,432 reviews

Entertainment

7.0

Overall

8.0

Comfort

7.8

Boarding

8.1

Crew

8.5

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.
Frontier
5.8
Fair
3,084 reviews
Alaska Airlines
8.0
Very good
11,432 reviews

Entertainment

7.0

Overall

8.0

Comfort

7.8

Boarding

8.1

Crew

8.5

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.

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 35 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 and Alaska Airlines fly from Philadelphia to State of Washington in about 7h 41m. The time it takes to get you to your destination can typically vary by up to 36m. 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 $85 on Frontier. Other airlines that offer cheap prices include Spirit Airlines from $107 and Delta from $114 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 (88%), British Airways (86%) or Alaska Airlines (81%) 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 $1,215, our data indicates the cheapest price to be $148. The most popular route (Philadelphia - Seattle/Tacoma Intl), is priced around $225.

  • 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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Alternative routes for Philadelphia to Washington

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 December 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$115Average$253FlexibilityNo cancel feeOn-time65%
FrontierCheapest$134Average$295FlexibilityNo cancel feeOn-time62%
DeltaCheapest$228Average$443FlexibilityNo cancel feeOn-timeN/A
Sun Country AirCheapest$238Average$369FlexibilityNo cancel feeOn-time83%
Hawaiian AirlinesCheapest$257Average$474FlexibilityNo cancel feeOn-time85%
United AirlinesCheapest$276Average$486FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$276Average$541FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$277Average$467FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$296Average$465FlexibilityNo cancel feeOn-time63%

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