Find Cheap Flights from Philadelphia to Seattle (PHL - SEA)

Flights overview

Useful information for finding cheap flights from Philadelphia to Seattle and booking your next trip

Cheapest round-trip flights	$229	Frontier 1 stop 26 hr Fri, Jun 5 — Sat, Jun 13	The cheapest round-trip flight from Philadelphia to Seattle is currently $229
Cheapest one-way flight	$105	Frontier 1 stop 11 hr Tue, Jun 9	The cheapest one-way flight from Philadelphia to Seattle is currently $105
Cheapest nonstop flights	$329	Delta Nonstop 6 hr Thu, May 28 — Wed, Jun 3	The cheapest nonstop round-trip flight from Philadelphia to Seattle is currently $329
Last-minute weekend getaway	$260	Frontier 1 stop 17 hr Thu, Apr 23 — Sun, Apr 26	The cheapest last-minute weekend getaway from Philadelphia to Seattle is currently $260
Cheapest business class flights	$488	Frontier 1 stop 26 hr Thu, Jun 4 — Wed, Jun 10	The cheapest business class round-trip flight from Philadelphia to Seattle is currently $488

Fastest flight	5 hr 50 min	The fastest nonstop flight from Philadelphia to Seattle takes 5 hr 50 min
Nonstop flights	Every day	There are direct flights on this route every day.

When is the cheapest time to fly?

The cheapest month to fly from Philadelphia to Seattle is typically October. The most expensive month to fly is typically July.

October Cheapest	Typical prices: $185–400
July Most expensive	Typical prices: $285–380

Popular airlines from Philadelphia to Seattle

American

Nonstop

from $329

Typical price: $275–670

14 weekly nonstop flights

PHL - SEA Every day

330 weekly connecting flights

PHL - SEA Every day
Alaska

Nonstop

from $329

Typical price: $305–740

14 weekly nonstop flights

PHL - SEA Every day
Delta

from $329

Typical price: $295–730

274 weekly connecting flights

PHL - SEA Every day
United

from $348

Typical price: $290–670

148 weekly connecting flights

PHL - SEA Every day
Southwest

from $312

Typical price: $330–670

113 weekly connecting flights

PHL - SEA Every day
Frontier

from $210

Typical price: $230–550

20 weekly connecting flights

PHL - SEA Every day

Popular airports near Philadelphia

Philadelphia International Airport (PHL)

Philadelphia United States 19 min 7 mi
John F. Kennedy International Airport (JFK)

New York United States 1 hr 54 min 87 mi
Newark Liberty International Airport (EWR)

Newark United States 1 hr 27 min 73 mi
LaGuardia Airport (LGA)

New York United States 1 hr 57 min 88 mi

Popular airports near Seattle

Seattle-Tacoma International Airport (SEA)

Seattle United States 18 min 11 mi
Portland International Airport (PDX)

Portland United States 2 hr 44 min 140 mi
Paine Field (PAE)

Everett United States 31 min 21 mi
King County International Airport - Boeing Field (BFI)

Seattle United States 11 min 5 mi

Frequently asked questions about flying from Philadelphia to Seattle

The cheapest flights from Philadelphia to Seattle are usually in October. Typical ticket prices in October range from $185 to $400.

The cheapest round-trip flight from Philadelphia to Seattle recently found on Google Flights was with Frontier from $229. The cheapest one-way flight was with Frontier from $105.

Some of the cheapest round-trip deals we found with different airlines:

The cheapest American flight from Philadelphia to Seattle is $329, flying from May 28 to Jun 3.
The cheapest Alaska flight from Philadelphia to Seattle is $329, flying from May 28 to Jun 3.
The cheapest Delta flight from Philadelphia to Seattle is $329, flying from May 28 to Jun 3.
The cheapest United flight from Philadelphia to Seattle is $348, flying from Jun 1 to Jun 10.
The cheapest Southwest flight from Philadelphia to Seattle is $312, flying from Jun 8 to Jun 15.
The cheapest Frontier flight from Philadelphia to Seattle is $210, flying from May 3 to May 9.

The cheapest round-trip flight from Philadelphia to Seattle starts at $229 from Fri, Jun 5 to Sat, Jun 13. The cheapest one-way flight starts at $105 and departs on Tue, Jun 9.

5 hr 50 min is the shortest flight time from Philadelphia to Seattle.

Most visitors come May–Sep, a period encompassing events such as the Seattle International Film Festival (May); Seafair (Jul), a summer festival including boat races, marathons and parades; and Bumbershoot (Sep), an international music and arts festival. Rainy season is Nov–May, though rain is possible year-round.

It's easy to use Google Flights to find the cheapest days to fly from Philadelphia to Seattle.
Just click the Departure label near the top of the page to open the calendar. Choose a start date and a return date to see how the round-trip fare changes on those specific days.
Adjust the trip type to see one-way fares. The cheapest available flights are highlighted and easy to spot. Once you settle on dates, click the Search button to see flight options and book the deal.

You can also turn on price tracking to get alerts if the price changes for a route or flight.

What counts as the best airline for your flights from Philadelphia to Seattle really depends on your individual needs. You may have a favorite carrier or a loyalty program you like, but price, convenience, and airports served also come into play. Flexibility and booking terms – Can you change flights if you want to stay longer or get a refund if you have to postpone your trip? – are also factors that help determine which airline is best to fly from Philadelphia to Seattle.

In terms of nonstop flights, American is the most popular. American offers 14 nonstop flights and 330 connecting flights per week. American flies from Philadelphia International Airport (PHL) to Seattle-Tacoma International Airport (SEA) .

Other popular airlines flying from Philadelphia to Seattle are:

Alaska offers 14 nonstop flights per week. Alaska flies from Philadelphia International Airport (PHL) to Seattle-Tacoma International Airport (SEA) .
Delta offers 274 connecting flights per week. Delta flies from Philadelphia International Airport (PHL) to Seattle-Tacoma International Airport (SEA) .
United offers 148 connecting flights per week. United flies from Philadelphia International Airport (PHL) to Seattle-Tacoma International Airport (SEA) .
Southwest offers 113 connecting flights per week. Southwest flies from Philadelphia International Airport (PHL) to Seattle-Tacoma International Airport (SEA) .
Frontier offers 20 connecting flights per week. Frontier flies from Philadelphia International Airport (PHL) to Seattle-Tacoma International Airport (SEA) .

The number of connecting flights refers to distinct flights with at least one stop between Philadelphia and Seattle.

The cheapest round-trip flight from Philadelphia to Seattle recently found on Google Flights was with Frontier from $229. The cheapest one-way flight was with Frontier from $105.

Some of the cheapest round-trip deals we found with different airlines:

The cheapest American flight from Philadelphia to Seattle is $329, flying from May 28 to Jun 3.
The cheapest Alaska flight from Philadelphia to Seattle is $329, flying from May 28 to Jun 3.
The cheapest Delta flight from Philadelphia to Seattle is $329, flying from May 28 to Jun 3.
The cheapest United flight from Philadelphia to Seattle is $348, flying from Jun 1 to Jun 10.
The cheapest Southwest flight from Philadelphia to Seattle is $312, flying from Jun 8 to Jun 15.
The cheapest Frontier flight from Philadelphia to Seattle is $210, flying from May 3 to May 9.

American and Alaska fly direct from Philadelphia to Seattle.

There are 14 American direct flights from Philadelphia to Seattle per week. Flights are available every day.
There are 14 Alaska direct flights from Philadelphia to Seattle per week. Flights are available every day.

Use the Stops filter while searching for flights, to see only nonstop options in your results.

The cheapest last-minute deal between Philadelphia and Seattle at price $260 is offered by Frontier from Thu, Apr 23 to Sun, Apr 26.

American and Alaska fly direct from Philadelphia to Seattle.

There are 14 American direct flights from Philadelphia to Seattle per week. Flights are available every day.
There are 14 Alaska direct flights from Philadelphia to Seattle per week. Flights are available every day.

Use the Stops filter while searching for flights, to see only nonstop options in your results.

There are direct flights from Philadelphia to Seattle on a daily basis.

The cheapest direct (nonstop) round-trip flights between Philadelphia and Seattle start at $329 from Thu, May 28 to Wed, Jun 3 with Delta.

It's easy to find nonstop flights with Google Flights! Once you've searched for flights from Philadelphia to Seattle, just select the nonstop flights only option in the 'Stops’ filter in the search form and view all available direct flights and their prices.

The cheapest business class round-trip flights between Philadelphia and Seattle start at $488 from Thu, Jun 4 to Wed, Jun 10 with Frontier.

The cheapest economy class round-trip flights between Philadelphia and Seattle start at $229 from Fri, Jun 5 to Sat, Jun 13.

To book business class trips from Philadelphia to Seattle, look for the default Economy selection at the top, and change it to your desired cabin class such as Premium Economy, Business Class, or First Class. You can then select your departure and arrival dates, consider available options, and book your business travel.

You can also adjust the trip type to view one-way fares.

The best last-minute getaway deal for the next weekend between Philadelphia and Seattle starts at $260 from Thu, Apr 23 to Sun, Apr 26 with Frontier.

The cheapest last-minute deal between Philadelphia and Seattle at price $260 is offered by Frontier from Thu, Apr 23 to Sun, Apr 26.

To find last-minute flight deals from Philadelphia to Seattle, start by entering the city names, select the desired departure and return dates, and hit the Search button to view flight options.

You can check for last-minute flights for the same day or adjust the trip type to see one-way fares.