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

Flights overview

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

Cheapest round-trip flights	$200	Frontier 1 stop 11 hr Sun, Apr 19 — Sun, Apr 26	The cheapest round-trip flight from Seattle to Philadelphia is currently $200
Cheapest one-way flight	$100	Frontier 1 stop 8 hr Sun, Apr 19	The cheapest one-way flight from Seattle to Philadelphia is currently $100
Cheapest nonstop flights	$297	Alaska Nonstop 6 hr Fri, Apr 17 — Fri, Apr 24	The cheapest nonstop round-trip flight from Seattle to Philadelphia is currently $297
Last-minute weekend getaway	$418	American Nonstop 6 hr Sat, Mar 14 — Mon, Mar 16	The cheapest last-minute weekend getaway from Seattle to Philadelphia is currently $418
Cheapest business class flights	$448	Frontier 1 stop 8 hr Mon, Apr 20 — Mon, Apr 27	The cheapest business class round-trip flight from Seattle to Philadelphia is currently $448

Fastest flight	5 hr 4 min	The fastest nonstop flight from Seattle to Philadelphia takes 5 hr 4 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 Seattle to Philadelphia is typically October. The most expensive month to fly is typically July.

October Cheapest	Typical prices: $195–390
July Most expensive	Typical prices: $295–395

Popular airlines from Seattle to Philadelphia

American

Nonstop

from $309

Typical price: $275–670

7 weekly nonstop flights

SEA - PHL Every day

297 weekly connecting flights

SEA - PHL Every day
Alaska

Nonstop

from $297

Typical price: $325–740

7 weekly nonstop flights

SEA - PHL Every day
Delta

from $309

Typical price: $295–730

218 weekly connecting flights

SEA - PHL Every day
United

from $319

Typical price: $290–670

116 weekly connecting flights

SEA - PHL Every day
Southwest

from $313

Typical price: $330–680

55 weekly connecting flights

SEA - PHL Every day
Frontier

from $200

Typical price: $240–530

11 weekly connecting flights

SEA - PHL Every Mon, Thu, Fri, Sun

Popular airports near Seattle

Seattle-Tacoma International Airport (SEA)

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

Portland United States 2 hr 44 min 140 mi

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 58 min 88 mi

Frequently asked questions about flying from Seattle to Philadelphia

The cheapest flights from Seattle to Philadelphia are usually in October. Typical ticket prices in October range from $195 to $390.

The cheapest round-trip flight from Seattle to Philadelphia recently found on Google Flights was with Frontier from $200. The cheapest one-way flight was with Frontier from $100.

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

The cheapest American flight from Seattle to Philadelphia is $309, flying from Apr 16 to Apr 22.
The cheapest Alaska flight from Seattle to Philadelphia is $297, flying from Apr 17 to Apr 24.
The cheapest Delta flight from Seattle to Philadelphia is $309, flying from May 21 to May 27.
The cheapest United flight from Seattle to Philadelphia is $319, flying from Apr 16 to Apr 22.
The cheapest Southwest flight from Seattle to Philadelphia is $313, flying from Apr 23 to Apr 29.
The cheapest Frontier flight from Seattle to Philadelphia is $200, flying from Apr 19 to Apr 26.

The cheapest round-trip flight from Seattle to Philadelphia starts at $200 from Sun, Apr 19 to Sun, Apr 26. The cheapest one-way flight starts at $100 and departs on Sun, Apr 19.

5 hr 4 min is the shortest flight time from Seattle to Philadelphia.

Philadelphia's peak travel season is May–Aug. Big events include the New Year's Day Mummers Parade, with costumes and bands; the Philadelphia Flower Show (Mar), a renowned horticultural event founded in 1829; the Welcome America festival, which features concerts and fireworks (Jun–Jul); the multi-week Fringe Festival (Sep), with dance, theater and music performances throughout the city; and the Philadelphia Marathon (Nov).

It's easy to use Google Flights to find the cheapest days to fly from Seattle to Philadelphia.
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 Seattle to Philadelphia 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 Seattle to Philadelphia.

In terms of nonstop flights, American is the most popular. American offers 7 nonstop flights and 297 connecting flights per week. American flies from Seattle-Tacoma International Airport (SEA) to Philadelphia International Airport (PHL) .

Other popular airlines flying from Seattle to Philadelphia are:

Alaska offers 7 nonstop flights per week. Alaska flies from Seattle-Tacoma International Airport (SEA) to Philadelphia International Airport (PHL) .
Delta offers 218 connecting flights per week. Delta flies from Seattle-Tacoma International Airport (SEA) to Philadelphia International Airport (PHL) .
United offers 116 connecting flights per week. United flies from Seattle-Tacoma International Airport (SEA) to Philadelphia International Airport (PHL) .
Southwest offers 55 connecting flights per week. Southwest flies from Seattle-Tacoma International Airport (SEA) to Philadelphia International Airport (PHL) .
Frontier offers 11 connecting flights per week. Frontier flies from Seattle-Tacoma International Airport (SEA) to Philadelphia International Airport (PHL) .

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

The cheapest round-trip flight from Seattle to Philadelphia recently found on Google Flights was with Frontier from $200. The cheapest one-way flight was with Frontier from $100.

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

The cheapest American flight from Seattle to Philadelphia is $309, flying from Apr 16 to Apr 22.
The cheapest Alaska flight from Seattle to Philadelphia is $297, flying from Apr 17 to Apr 24.
The cheapest Delta flight from Seattle to Philadelphia is $309, flying from May 21 to May 27.
The cheapest United flight from Seattle to Philadelphia is $319, flying from Apr 16 to Apr 22.
The cheapest Southwest flight from Seattle to Philadelphia is $313, flying from Apr 23 to Apr 29.
The cheapest Frontier flight from Seattle to Philadelphia is $200, flying from Apr 19 to Apr 26.

Alaska and American fly direct from Seattle to Philadelphia.

There are 7 American direct flights from Seattle to Philadelphia per week. Flights are available every day.
There are 7 Alaska direct flights from Seattle to Philadelphia 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 Seattle and Philadelphia at price $418 is offered by American from Sat, Mar 14 to Mon, Mar 16.

Alaska and American fly direct from Seattle to Philadelphia.

There are 7 American direct flights from Seattle to Philadelphia per week. Flights are available every day.
There are 7 Alaska direct flights from Seattle to Philadelphia 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 Seattle to Philadelphia on a daily basis.

The cheapest direct (nonstop) round-trip flights between Seattle and Philadelphia start at $297 from Fri, Apr 17 to Fri, Apr 24 with Alaska.

It's easy to find nonstop flights with Google Flights! Once you've searched for flights from Seattle to Philadelphia, 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 Seattle and Philadelphia start at $448 from Mon, Apr 20 to Mon, Apr 27 with Frontier.

The cheapest economy class round-trip flights between Seattle and Philadelphia start at $200 from Sun, Apr 19 to Sun, Apr 26.

To book business class trips from Seattle to Philadelphia, 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 Seattle and Philadelphia starts at $418 from Sat, Mar 14 to Mon, Mar 16 with American.

The cheapest last-minute deal between Seattle and Philadelphia at price $418 is offered by American from Sat, Mar 14 to Mon, Mar 16.

To find last-minute flight deals from Seattle to Philadelphia, 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.