What is the cheapest airline that flies from Washington to Philadelphia?

Frontier, Alaska Airlines, and Sun Country Air are the most popular carriers operating from Washington to Philadelphia

What airlines fly to Philadelphia?

Alaska Airlines, Delta and American Airlines are the top three most popular airlines that fly to Philadelphia from State of Washington according to our data. Alaska Airlines is the first choice among our users, with 48% of people opting to fly with this airline when traveling to Philadelphia. Keep in mind that there are 10 different airlines that fly to Philadelphia on a routine basis, so you have a few additional options to choose from.

How long does it take to fly to Philadelphia?

If you’re flying from a popular airport in State of Washington, such as Seattle or Spokane, and flying into Philadelphia, then you can expect flight times to average 5h 14m and 7h 40m, respectively.

When did momondo last update prices for flights from Washington to Philadelphia Airport?

Prices for flights from Washington to Philadelphia Airport are updated daily.

How many operators does momondo search for flights from Washington to Philadelphia Airport?

As of November 2025, there are 9 operators available to choose from for flights from Washington to Philadelphia Airport.

How old do you have to be to fly from Washington to Philadelphia Airport?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Washington to Philadelphia Airport.

What documentation or ID do you need to fly to Philadelphia Airport?

The travel and health documents you'll need for your trip to Philadelphia Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Philadelphia Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$121 Cheap Flights from Washington to Philadelphia in 2025/26

Q: How many flights depart from State of Washington to Philadelphia on average per day?

7 flights are operational daily from State of Washington to Philadelphia as of November 2025. The most popular departure time for this route is 9:00AM, with 50% of flights per day taking off in the evening.

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Cheap round-trip flights

Enter your travel dates to find the best prices.

2:54 pm - 3:34 pmSEA-PHL

21h 40m1 stop

12:32 pm - 12:26 pmPHL-SEA

26h 54m2 stops

$257Frontier

Find Deal

Sun, Jan 11 - Wed, Jan 14

5:21 pm - 5:31 amSEA-PHL

33h 10m2 stops

8:36 pm - 12:30 pmPHL-SEA

18h 54m1 stop

$258Frontier

Find Deal

Sat, Dec 13 - Sun, Jan 4

7:00 am - 5:39 pmSEA-PHL

7h 39m1 stop

12:45 pm - 7:22 pmPHL-SEA

9h 37m1 stop

$262United Airlines

Find Deal

Fri, Dec 5 - Tue, Dec 9

9:29 pm - 5:37 amSEA-PHL

5h 08mnonstop

7:06 pm - 10:29 pmPHL-SEA

6h 23mnonstop

$267Alaska Airlines

Find Deal

Mon, Jan 5 - Sun, Jan 11

11:55 pm - 10:51 amSEA-PHL

7h 56m1 stop

5:01 pm - 11:59 pmPHL-SEA

9h 58m1 stop

$272Delta

Find Deal

Mon, Nov 24 - Fri, Dec 5

11:55 pm - 10:51 amSEA-PHL

7h 56m1 stop

12:22 pm - 6:40 pmPHL-SEA

9h 18m1 stop

$277Delta

Find Deal

Mon, Nov 24 - Thu, Nov 27

9:35 pm - 5:46 amSEA-PHL

5h 11mnonstop

7:00 am - 10:04 amPHL-SEA

6h 04mnonstop

$282Alaska Airlines

Find Deal

Sat, Dec 13 - Tue, Jan 6

6:35 am - 8:50 pmSEA-PHL

11h 15m1 stop

1:25 pm - 9:05 pmPHL-SEA

10h 40m2 stops

$290Southwest

Find Deal

Sun, Jan 11 - Sat, Jan 24

7:00 am - 5:39 pmSEA-PHL

7h 39m1 stop

6:30 am - 11:47 amPHL-SEA

8h 17m1 stop

$294United Airlines

Find Deal

Thu, Dec 4 - Sun, Dec 7

5:40 am - 9:15 pmSEA-PHL

12h 35m2 stops

1:50 pm - 10:55 pmPHL-SEA

12h 05m2 stops

$303Southwest

Find Deal

Tue, Dec 9 - Tue, Dec 16

Frontier flights from State of Washington to Philadelphia

Our best Frontier deals on State of Washington to Philadelphia flight tickets

Frontier

Jan 11

SEA2:54 pmSeattle/Tacoma Intl

21h 40m

1 stop

PHL3:34 pmPhiladelphia

Jan 14

PHL12:32 pmPhiladelphia

26h 54m

2 stops

SEA12:26 pmSeattle/Tacoma Intl

$257

Find similar

Frontier

Dec 13

SEA5:21 pmSeattle/Tacoma Intl

33h 10m

2 stops

PHL5:31 amPhiladelphia

Jan 4

PHL8:36 pmPhiladelphia

18h 54m

1 stop

SEA12:30 pmSeattle/Tacoma Intl

$258

Find similar

Frontier

Dec 14

SEA12:48 pmSeattle/Tacoma Intl

13h 43m

1 stop

PHL5:31 amPhiladelphia

Jan 9

PHL3:48 pmPhiladelphia

24h 19m

2 stops

SEA1:07 pmSeattle/Tacoma Intl

$259

Find similar

United Airlines flights from State of Washington to Philadelphia

Our best United Airlines deals on State of Washington to Philadelphia flight tickets

United Airlines

Dec 5

SEA7:00 amSeattle/Tacoma Intl

7h 39m

1 stop

PHL5:39 pmPhiladelphia

Dec 9

PHL12:45 pmPhiladelphia

9h 37m

1 stop

SEA7:22 pmSeattle/Tacoma Intl

$262

Find similar

United Airlines

Dec 4

SEA7:00 amSeattle/Tacoma Intl

7h 39m

1 stop

PHL5:39 pmPhiladelphia

Dec 7

PHL6:30 amPhiladelphia

8h 17m

1 stop

SEA11:47 amSeattle/Tacoma Intl

$294

Find similar

United Airlines

Dec 6

SEA9:25 amSeattle/Tacoma Intl

10h 57m

2 stops

PHL11:22 pmPhiladelphia

Dec 13

PHL3:35 pmPhiladelphia

8h 46m

1 stop

SEA9:21 pmSeattle/Tacoma Intl

$299

Find similar

momondo Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

SeattlePhiladelphia

SEA - PHL

SEAPHL

Seattle/Tacoma Intl

Sun 1/11

2:54 pm-3:34 pm

1 stop21h 40m

Philadelphia

Wed 1/14

12:32 pm-12:26 pm

2 stops26h 54m

$257

SeattlePhiladelphia

SEA - PHL

SEAPHL

Seattle/Tacoma Intl

Sat 12/13

5:21 pm-5:31 am

2 stops33h 10m

Philadelphia

Sun 1/4

8:36 pm-12:30 pm

1 stop18h 54m

$258

SeattlePhiladelphia

SEA - PHL

SEAPHL

Seattle/Tacoma Intl

Fri 12/5

7:00 am-5:39 pm

1 stop7h 39m

Philadelphia

Tue 12/9

12:45 pm-7:22 pm

1 stop9h 37m

$262

SeattlePhiladelphia

SEA - PHL

SEAPHL

Seattle/Tacoma Intl

Mon 1/5

9:29 pm-5:37 am

Nonstop5h 08m

Philadelphia

Sun 1/11

7:06 pm-10:29 pm

Nonstop6h 23m

$267

SeattlePhiladelphia

SEA - PHL

SEAPHL

Seattle/Tacoma Intl

Mon 11/24

11:55 pm-10:51 am

1 stop7h 56m

Philadelphia

Fri 12/5

5:01 pm-11:59 pm

1 stop9h 58m

$272

SeattlePhiladelphia

SEA - PHL

SEAPHL

Seattle/Tacoma Intl

Mon 11/24

11:55 pm-10:51 am

1 stop7h 56m

Philadelphia

Thu 11/27

12:22 pm-6:40 pm

1 stop9h 18m

$277

SeattlePhiladelphia

SEA - PHL

SEAPHL

Seattle/Tacoma Intl

Sat 12/13

9:35 pm-5:46 am

Nonstop5h 11m

Philadelphia

Tue 1/6

7:00 am-10:04 am

Nonstop6h 04m

$282

SeattlePhiladelphia

SEA - PHL

SEAPHL

Seattle/Tacoma Intl

Sun 1/11

6:35 am-8:50 pm

1 stop11h 15m

Philadelphia

Sat 1/24

1:25 pm-9:05 pm

2 stops10h 40m

$290

SeattlePhiladelphia

SEA - PHL

SEAPHL

Seattle/Tacoma Intl

Thu 12/4

7:00 am-5:39 pm

1 stop7h 39m

Philadelphia

Sun 12/7

6:30 am-11:47 am

1 stop8h 17m

$294

SeattlePhiladelphia

SEA - PHL

SEAPHL

Seattle/Tacoma Intl

Tue 12/9

5:40 am-9:15 pm

2 stops12h 35m

Philadelphia

Tue 12/16

1:50 pm-10:55 pm

2 stops12h 05m

$303

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How to get the cheapest flight ticket from State of Washington to Philadelphia

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the cheapest month to fly to Philadelphia?

The cheapest month to fly to Philadelphia from State of Washington is in October. Flight prices, which tend to average around $331, are often lower during this time because this is during the off-season. The month of March is another great option to travel to Philadelphia, with average flight prices from State of Washington averaging around $397.

What is the cheapest day to depart on your flight to Philadelphia?

The cheapest day to depart from State of Washington to Philadelphia is on a Wednesday. Travelers who choose to depart for Philadelphia on a Wednesday will often find tickets for as low as $462. On the other hand, Sunday is the most expensive day to depart from State of Washington because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $584.

What is the cheapest time of day to depart on your flight to Philadelphia?

According to our data, the cheapest time of day to fly to Philadelphia is at noon. momondo users have found flights departing from State of Washington to Philadelphia at noon for as low as $344. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In contrast, the most expensive time of day to depart to Philadelphia is in the afternoon when prices are around $726.

What is the cheapest Washington to Philadelphia flight route?

Fly from Seattle/Tacoma Intl to Philadelphia for the best Washington - Philadelphia flight prices

How far in advance should I book a flight to Philadelphia?

You are more likely to see cheaper flights to Philadelphia from State of Washington when booking weeks ahead of your departure date. In general, you can expect to find flights to Philadelphia for around $438 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Philadelphia from State of Washington for as low as $378 on momondo.

What cabin class options are available on Washington to Philadelphia flights?

There are 4 cabin classes available to choose from on Washington to Philadelphia flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Cheap State of Washington to Philadelphia flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from State of Washington to Philadelphia

Best Price Found	$191
Fastest flight time	4h 55m
Direct flights	Every day
Airports in Philadelphia	1 airport

The best one-way flight to Philadelphia from State of Washington in the past 72 hours is $191. The best round-trip flight deal from State of Washington to Philadelphia found on momondo in the last 72 hours is $329.

The fastest flight from State of Washington to Philadelphia takes 4h 55m

Direct flights go from State of Washington to Philadelphia every day.

There is 1 airport near Philadelphia: Philadelphia (PHL)

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When did momondo last update prices for flights from Washington to Philadelphia Airport?
Prices for flights from Washington to Philadelphia Airport are updated daily.
How many operators does momondo search for flights from Washington to Philadelphia Airport?
As of November 2025, there are 9 operators available to choose from for flights from Washington to Philadelphia Airport.
How old do you have to be to fly from Washington to Philadelphia Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Washington to Philadelphia Airport.
What documentation or ID do you need to fly to Philadelphia Airport?
The travel and health documents you'll need for your trip to Philadelphia Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Philadelphia Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from State of Washington to Philadelphia?
Based on momondo bookings for flights between State of Washington and Philadelphia, the leading plane model is Boeing 737 MAX 9, making up 35.25% of the total bookings. Other popular models include Airbus A321-100/200 with 23.09%, Boeing 737-900 Passenger/BBJ3 (winglets) with 14.70%, and Boeing 737 with 8.18%.

Best airlines flying from State of Washington to Philadelphia

Compare and see reviews for airlines that fly from State of Washington to Philadelphia with momondo

Airline	Rating	Free Cancellation	Price
Frontier	PriceFrom $131	Free Cancellation	Rating 5.8 3,111 reviews	Search Frontier flights
Spirit Airlines	PriceFrom $138	Free Cancellation	Rating 6.3 8,133 reviews	Search Spirit Airlines flights
United Airlines	PriceFrom $206	Free Cancellation	Rating 7.4 9,010 reviews	Search United Airlines flights
Delta	PriceFrom $221	Free Cancellation	Rating 7.9 8,003 reviews	Search Delta flights
Sun Country Air	PriceFrom $233	Free Cancellation	Rating 6.9 336 reviews	Search Sun Country Air flights
Hawaiian Airlines	PriceFrom $277	Free Cancellation	Rating 7.8 2,804 reviews	Search Hawaiian Airlines flights
Alaska Airlines	PriceFrom $277	Free Cancellation	Rating 8.0 11,258 reviews	Search Alaska Airlines flights
American Airlines	PriceFrom $277	Free Cancellation	Rating 7.2 11,047 reviews	Search American Airlines flights
Southwest	PriceFrom $351	Free Cancellation	Rating 8.0 4,236 reviews	Search Southwest flights

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Wildwood Crest

King of Prussia

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Dewey Beach

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North Wildwood

Dover

Avalon

Lewes

Stone Harbor

Essington

Vineland

Pottstown

New Castle

Somers Point

Why use momondo?

Why should I use momondo to find a flight deal from Washington to Philadelphia?

Finding the right flight to Philadelphia from Washington is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Philadelphia quick and easy, saving you time and money.

Can I find flights from Washington to Philadelphia with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Philadelphia from Washington with this policy.

How can momondo help me find flights from Washington to Philadelphia?

Once you have performed a search for Washington to Philadelphia flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Washington to Philadelphia right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Philadelphia from Washington. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your Philadelphia trip

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Cheap flights from Washington to Philadelphia from $121

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington to Philadelphia departing on 1/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Filter for what you want

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Find the cheapest flights from Washington to Philadelphia

Cheap round-trip flights

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Cheap last minute flights

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Frontier flights from State of Washington to Philadelphia

Our best Frontier deals on State of Washington to Philadelphia flight tickets

United Airlines flights from State of Washington to Philadelphia

Our best United Airlines deals on State of Washington to Philadelphia flight tickets

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

See travel insights to Philadelphia from

How to get the cheapest flight ticket from State of Washington to Philadelphia

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Philadelphia?

What is the cheapest day to depart on your flight to Philadelphia?

What is the cheapest time of day to depart on your flight to Philadelphia?

What is the cheapest Washington to Philadelphia flight route?

Fly from Seattle/Tacoma Intl to Philadelphia for the best Washington - Philadelphia flight prices

How far in advance should I book a flight to Philadelphia?

What cabin class options are available on Washington to Philadelphia flights?

There are 4 cabin classes available to choose from on Washington to Philadelphia flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

What is the cheapest airline that flies from Washington to Philadelphia?

Frontier, Alaska Airlines, and Sun Country Air are the most popular carriers operating from Washington to Philadelphia

What airlines fly to Philadelphia?

How many flights depart from State of Washington to Philadelphia on average per day?

7 flights are operational daily from State of Washington to Philadelphia as of November 2025. The most popular departure time for this route is 9:00AM, with 50% of flights per day taking off in the evening.

How many flights depart from State of Washington to Philadelphia on average per week?

As of November 2025, there are 51 flights per week flying from State of Washington to Philadelphia. The most common day of the week flights depart is Fri, with 24% of flights taking off on this day.

How long does it take to fly to Philadelphia?

If you’re flying from a popular airport in State of Washington, such as Seattle or Spokane, and flying into Philadelphia, then you can expect flight times to average 5h 14m and 7h 40m, respectively.

Cheap State of Washington to Philadelphia flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from State of Washington to Philadelphia

Best Price Found

Fastest flight time

Direct flights

Airports in Philadelphia

When did momondo last update prices for flights from Washington to Philadelphia Airport?

How many operators does momondo search for flights from Washington to Philadelphia Airport?

How old do you have to be to fly from Washington to Philadelphia Airport?

What documentation or ID do you need to fly to Philadelphia Airport?

What is the most popular plane model from State of Washington to Philadelphia?

Best airlines flying from State of Washington to Philadelphia

Compare and see reviews for airlines that fly from State of Washington to Philadelphia with momondo

Traveling to a place near Philadelphia?

Why use momondo?

Why should I use momondo to find a flight deal from Washington to Philadelphia?

Can I find flights from Washington to Philadelphia with flexible booking policies on momondo?

How can momondo help me find flights from Washington to Philadelphia?

I’m not ready to book a flight from Washington to Philadelphia right now. Can momondo alert me if prices change?

An easier way to manage your Philadelphia trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to the United States

Airports servicing Pennsylvania