What airlines fly to State of Washington?

Alaska Airlines, United Airlines and American Airlines are the top three most popular airlines that fly to State of Washington from Philadelphia according to our data. Alaska Airlines is the first choice among our users, with 44% of people opting to fly with this airline when traveling to State of Washington. Keep in mind that there are 8 different airlines that fly to State of Washington on a routine basis, so you have a few additional options to choose from.

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

Delta, Southwest, and United Airlines are the most popular carriers operating from Philadelphia to Washington

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

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

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

The number of operators available for flights from Philadelphia Airport to Washington is 7 as of August 2026.

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

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Philadelphia Airport to Washington.

What documentation or ID do you need to fly to Washington?

The travel and health documents required for your trip to Washington can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Washington. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$145 Cheap Flights from Philadelphia to Washington in 2026

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

The number of flights available between Philadelphia and State of Washington is 4 per day as of August 2026. The most frequent departure time is 4:00PM, with 36% of daily flights leaving in the afternoon.

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Philadelphia to Washington

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

7:05 am - 12:20 pm-

8h 15m

10:50 pm - 9:27 am-

7h 37m

$289Delta

Wed, Sep 23 - Mon, Sep 28

7:05 am - 12:20 pm-

8h 15m

5:49 pm - 5:50 am-

9h 01m

$307Delta

Tue, Sep 8 - Fri, Sep 11

4:50 pm - 9:00 pm-

7h 10m

11:05 am - 10:55 pm-

8h 50m

$307Southwest

Sat, Sep 5 - Sat, Sep 12

4:05 pm - 10:05 pm-

9h 00m

6:00 am - 5:55 pm-

8h 55m

$307Southwest

Thu, Sep 10 - Fri, Sep 11

1:30 pm - 10:41 pm-

12h 11m

1:37 pm - 11:44 pm-

7h 07m

$312United Airlines

Thu, Sep 10 - Fri, Sep 11

12:55 pm - 8:21 pm-

10h 26m

6:30 am - 9:06 pm-

11h 36m

$325American Airlines

Sat, Sep 12 - Tue, Sep 22

8:37 pm - 1:22 pm-

19h 45m

9:29 pm - 6:30 am-

30h 01m

$329Frontier

Wed, Aug 19 - Thu, Aug 20

8:37 pm - 9:19 am-

15h 42m

7:45 pm - 6:14 pm-

19h 29m

$329Frontier

Mon, Sep 7 - Fri, Sep 11

1:30 pm - 7:14 pm-

8h 44m

11:00 pm - 10:02 am-

8h 02m

$329United Airlines

Fri, Sep 11 - Mon, Sep 14

12:57 pm - 8:42 pm-

10h 45m

12:44 pm - 12:19 am-

8h 35m

$337American Airlines

Thu, Aug 27 - Thu, Sep 3

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Frontier flights from Philadelphia to State of Washington

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

Frontier

Aug 6

PHL8:37 pmPhiladelphia

15h 27m

1 stop

SEA9:04 amSeattle/Tacoma Intl

Aug 11

SEA8:13 pmSeattle/Tacoma Intl

30h 47m

1 stop

PHL6:00 amPhiladelphia

$329

Frontier

Aug 13

PHL11:06 amPhiladelphia

26h 58m

1 stop

SEA11:04 amSeattle/Tacoma Intl

Aug 18

SEA8:53 pmSeattle/Tacoma Intl

30h 37m

1 stop

PHL6:30 amPhiladelphia

$330

Frontier

Aug 16

PHL8:37 pmPhiladelphia

15h 27m

1 stop

SEA9:04 amSeattle/Tacoma Intl

Aug 24

SEA9:29 pmSeattle/Tacoma Intl

30h 01m

1 stop

PHL6:30 amPhiladelphia

$331

Alaska Airlines flights from Philadelphia to State of Washington

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

Alaska Airlines

Sep 2

PHL6:59 pmPhiladelphia

8h 00m

1 stop

GEG11:59 pmSpokane

Sep 8

GEG8:31 amSpokane

18h 09m

1 stop

PHL5:40 amPhiladelphia

$341

Alaska Airlines

Sep 2

PHL4:48 pmPhiladelphia

5h 46m

PDX7:34 pmPortland

Sep 12

PDX7:30 amPortland

5h 15m

PHL3:45 pmPhiladelphia

$357

Alaska Airlines

Sep 2

PHL6:59 pmPhiladelphia

5h 52m

SEA9:51 pmSeattle/Tacoma Intl

Sep 11

SEA9:27 pmSeattle/Tacoma Intl

5h 13m

PHL5:40 amPhiladelphia

$359

momondo Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Wed 9/23

7:05 am-12:20 pm

1 stop8h 15m

Spokane

Mon 9/28

10:50 pm-9:27 am

1 stop7h 37m

$289

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Tue 9/8

7:05 am-12:20 pm

1 stop8h 15m

Spokane

Fri 9/11

5:49 pm-5:50 am

1 stop9h 01m

$307

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Sat 9/5

4:50 pm-9:00 pm

1 stop7h 10m

Spokane

Sat 9/12

11:05 am-10:55 pm

1 stop8h 50m

$307

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Thu 9/10

4:05 pm-10:05 pm

1 stop9h 00m

Spokane

Fri 9/11

6:00 am-5:55 pm

1 stop8h 55m

$307

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Thu 9/10

1:30 pm-10:41 pm

2 stops12h 11m

Spokane

Fri 9/11

1:37 pm-11:44 pm

1 stop7h 07m

$312

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Sat 9/12

12:55 pm-8:21 pm

1 stop10h 26m

Spokane

Tue 9/22

6:30 am-9:06 pm

1 stop11h 36m

$325

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Wed 8/19

8:37 pm-1:22 pm

1 stop19h 45m

Seattle/Tacoma Intl

Thu 8/20

9:29 pm-6:30 am

1 stop30h 01m

$329

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Mon 9/7

8:37 pm-9:19 am

1 stop15h 42m

Seattle/Tacoma Intl

Fri 9/11

7:45 pm-6:14 pm

2 stops19h 29m

$329

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Fri 9/11

1:30 pm-7:14 pm

1 stop8h 44m

Seattle/Tacoma Intl

Mon 9/14

11:00 pm-10:02 am

1 stop8h 02m

$329

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Thu 8/27

12:57 pm-8:42 pm

1 stop10h 45m

Spokane

Thu 9/3

12:44 pm-12:19 am

1 stop8h 35m

$337

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

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 State of Washington?

The month of October is, on average, the cheapest month to fly to State of Washington from Philadelphia, with most prices found around $336. If you aren’t able to travel to State of Washington during the month of October, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $336.

What is the cheapest day to depart on your flight to State of Washington?

The cheapest day to depart from Philadelphia to State of Washington is on a Wednesday. Travelers who choose to depart for State of Washington on a Wednesday will often find tickets for as low as $425. When flying out on a Monday, the most expensive travel day of the week, you can expect to see flight prices from Philadelphia to State of Washington for around $537.

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

The cheapest time of day to fly to State of Washington is in the evening when flights can be purchased for as low as $460. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $465 on average. Flights to State of Washington from Philadelphia in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.

What is the cheapest Philadelphia to Washington flight route?

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

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

You are more likely to see cheaper flights to State of Washington from Philadelphia when booking weeks ahead of your departure date. In general, you can expect to find flights to State of Washington for around $391 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to State of Washington from Philadelphia for as low as $353 on momondo.

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

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

Can stopping save me money on Philadelphia to State of Washington flights?

You could potentially save up to 12% on your flight if you consider stops on a Philadelphia to State of Washington flight.

Cheap Philadelphia to State of Washington flight deals and tips

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

Best Price Found	$222
Fastest flight time	5h 46m
Direct flights	Every day
Airports in State of Washington	96 airports

The best one-way flight to State of Washington from Philadelphia in the past 72 hours is $222. The best round-trip flight deal from Philadelphia to State of Washington found on momondo in the last 72 hours is $372.

The fastest flight from Philadelphia to State of Washington takes 5h 46m

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

There are 96 airports in State of Washington. From Philadelphia there are direct flights to Portland (PDX), Seattle/Tacoma Intl (SEA).

Search flight deals

Frequently asked questions about flying from Philadelphia to Washington

When did momondo last update prices for flights from Philadelphia Airport to Washington?
Prices for flights from Philadelphia Airport to Washington are updated daily.
How many operators does momondo search for flights from Philadelphia Airport to Washington?
The number of operators available for flights from Philadelphia Airport to Washington is 7 as of August 2026.
How old do you have to be to fly from Philadelphia Airport to Washington?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Philadelphia Airport to Washington.
What documentation or ID do you need to fly to Washington?
The travel and health documents required for your trip to Washington can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Washington. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular plane model from Philadelphia to State of Washington?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Philadelphia to State of Washington is Airbus A321-100/200 (44.72% of total bookings). The next most popular plane models are Airbus A321neo (33.80%), Boeing 737 MAX 8 (10.84%), and Boeing 737-800 Passenger/BBJ2 (winglets) (2.97%).

Best airlines flying from Philadelphia to State of Washington

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

Airline	Rating	Free Cancellation	Price
Frontier	PriceFrom $134	Free Cancellation	Rating 5.6 2,738 reviews	Search Frontier flights
Hawaiian Airlines	PriceFrom $138	Free Cancellation	Rating 7.8 2,819 reviews	Search Hawaiian Airlines flights
Southwest	PriceFrom $163	Free Cancellation	Rating 8.0 4,222 reviews	Search Southwest flights
Delta	PriceFrom $232	Free Cancellation	Rating 7.8 8,481 reviews	Search Delta flights
Alaska Airlines	PriceFrom $239	Free Cancellation	Rating 7.9 12,762 reviews	Search Alaska Airlines flights
United Airlines	PriceFrom $260	Free Cancellation	Rating 7.4 10,059 reviews	Search United Airlines flights
American Airlines	PriceFrom $273	Free Cancellation	Rating 7.1 11,848 reviews	Search American Airlines flights

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Washington from Philadelphia.

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

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

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Philadelphia to Washington.

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

If you are not ready to book a flight from Philadelphia to Washington now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Washington and let you know when they change.

An easier way to manage your State of Washington 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.

Start using Trips

Find my bookings

Get notified when prices go down

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

1 adult

Thu 9/3

Thu 9/10

Email me momondo's favorite deals

By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Washington

Popular cities

Other flights from Philadelphia

Other flights to Washington

Airlines

Complete your trip

Feeling lucky

Popular cities in Washington

Flights to New Yorkfrom $71

Flights to Los Angelesfrom $60

Flights to Orlandofrom $55

Flights to Miamifrom $74

Flights to Chicagofrom $65

Flights to San Franciscofrom $53

Flights to Las Vegasfrom $53

Flights to Washington, D.C.from $59

Flights to Bostonfrom $51

Flights to Atlantafrom $56

Flights to Fort Lauderdalefrom $51

Flights to Dallasfrom $73

Cheap flights from Philadelphia to Washington from $145

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Philadelphia to Washington departing on 9/26. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Find the cheapest flights from Philadelphia to Washington

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

Cheap direct flights

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

Frontier flights from Philadelphia to State of Washington

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

Alaska Airlines flights from Philadelphia to State of Washington

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

momondo Fare Finder

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

See travel insights to Washington from

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

What is the cheapest month to fly to State of Washington?

What is the cheapest day to depart on your flight to State of Washington?

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

What is the cheapest Philadelphia to Washington flight route?

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

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

Can stopping save me money on Philadelphia to State of Washington flights?

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

What airlines fly to State of Washington?

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

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

Cheap Philadelphia to State of Washington flight deals and tips

Best Price Found

Fastest flight time

Direct flights

Airports in State of Washington

Frequently asked questions about flying from Philadelphia to Washington

Best airlines flying from Philadelphia to State of Washington

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

Why use momondo?

An easier way to manage your State of Washington 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 Washington

Popular cities in Washington

Popular flights according to clicks in the last 7 days on momondo

Philadelphia flight routes

According to popular flight searches on momondo this year

State of Washington flight routes

According to popular flight searches on momondo this year

Fly your favorite airline to Washington

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Complete your trip to Washington

Explore popular destinations other users love

According to popular flight searches on momondo this year