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	$230	Frontier 1 stop 12 hr Mon, Jul 13 — Wed, Jul 22	The cheapest round-trip flight from Seattle to Philadelphia is currently $230
Cheapest one-way flight	$111	Frontier 1 stop 14 hr Wed, Jul 15	The cheapest one-way flight from Seattle to Philadelphia is currently $111
Cheapest nonstop flights	$329	American Nonstop 6 hr Thu, Jun 4 — Wed, Jun 10	The cheapest nonstop round-trip flight from Seattle to Philadelphia is currently $329
Last-minute weekend getaway	$321	Frontier 1 stop 8 hr Sat, May 9 — Mon, May 11	The cheapest last-minute weekend getaway from Seattle to Philadelphia is currently $321
Cheapest business class flights	$502	Frontier 1 stop 32 hr Fri, Jul 31 — Sat, Aug 8	The cheapest business class round-trip flight from Seattle to Philadelphia is currently $502

Fastest flight	5 hr 9 min	The fastest nonstop flight from Seattle to Philadelphia takes 5 hr 9 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 $329

Typical price: $275–670

14 weekly nonstop flights

SEA - PHL Every day

318 weekly connecting flights

SEA - PHL Every day
Alaska

Nonstop

from $329

Typical price: $315–730

14 weekly nonstop flights

SEA - PHL Every day
Delta

Nonstop

from $329

Typical price: $295–720

3 weekly nonstop flights

SEA - PHL Every Thu, Fri, Sat

258 weekly connecting flights

SEA - PHL Every day
United

from $349

Typical price: $290–670

181 weekly connecting flights

SEA - PHL Every day
Southwest

from $349

Typical price: $325–670

169 weekly connecting flights

SEA - PHL Every day
Frontier

from $230

Typical price: $230–550

24 weekly connecting flights

SEA - PHL Every day

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

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

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 $230. The cheapest one-way flight was with Frontier from $111.

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

The cheapest American flight from Seattle to Philadelphia is $329, flying from Jun 4 to Jun 10.
The cheapest Alaska flight from Seattle to Philadelphia is $329, flying from Jun 1 to Jun 9.
The cheapest Delta flight from Seattle to Philadelphia is $329, flying from Jun 4 to Jun 10.
The cheapest United flight from Seattle to Philadelphia is $349, flying from May 28 to Jun 3.
The cheapest Southwest flight from Seattle to Philadelphia is $349, flying from May 28 to Jun 5.
The cheapest Frontier flight from Seattle to Philadelphia is $230, flying from Jul 13 to Jul 22.

The cheapest round-trip flight from Seattle to Philadelphia starts at $230 from Mon, Jul 13 to Wed, Jul 22. The cheapest one-way flight starts at $111 and departs on Wed, Jul 15.

5 hr 9 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 14 nonstop flights and 318 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 14 nonstop flights per week. Alaska flies from Seattle-Tacoma International Airport (SEA) to Philadelphia International Airport (PHL) .
Delta offers 3 nonstop flights and 258 connecting flights per week. Delta flies from Seattle-Tacoma International Airport (SEA) to Philadelphia International Airport (PHL) .
United offers 181 connecting flights per week. United flies from Seattle-Tacoma International Airport (SEA) to Philadelphia International Airport (PHL) .
Southwest offers 169 connecting flights per week. Southwest flies from Seattle-Tacoma International Airport (SEA) to Philadelphia International Airport (PHL) .
Frontier offers 24 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 $230. The cheapest one-way flight was with Frontier from $111.

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

The cheapest American flight from Seattle to Philadelphia is $329, flying from Jun 4 to Jun 10.
The cheapest Alaska flight from Seattle to Philadelphia is $329, flying from Jun 1 to Jun 9.
The cheapest Delta flight from Seattle to Philadelphia is $329, flying from Jun 4 to Jun 10.
The cheapest United flight from Seattle to Philadelphia is $349, flying from May 28 to Jun 3.
The cheapest Southwest flight from Seattle to Philadelphia is $349, flying from May 28 to Jun 5.
The cheapest Frontier flight from Seattle to Philadelphia is $230, flying from Jul 13 to Jul 22.

American, Alaska and Delta fly direct from Seattle to Philadelphia.

There are 14 American direct flights from Seattle to Philadelphia per week. Flights are available every day.
There are 14 Alaska direct flights from Seattle to Philadelphia per week. Flights are available every day.
There are 3 Delta direct flights from Seattle to Philadelphia per week. Flights are available on Thursday, Friday and Saturday.

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 $321 is offered by Frontier from Sat, May 9 to Mon, May 11.

American, Alaska and Delta fly direct from Seattle to Philadelphia.

There are 14 American direct flights from Seattle to Philadelphia per week. Flights are available every day.
There are 14 Alaska direct flights from Seattle to Philadelphia per week. Flights are available every day.
There are 3 Delta direct flights from Seattle to Philadelphia per week. Flights are available on Thursday, Friday and Saturday.

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 $329 from Thu, Jun 4 to Wed, Jun 10 with American.

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 $502 from Fri, Jul 31 to Sat, Aug 8 with Frontier.

The cheapest economy class round-trip flights between Seattle and Philadelphia start at $230 from Mon, Jul 13 to Wed, Jul 22.

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 $321 from Sat, May 9 to Mon, May 11 with Frontier.

The cheapest last-minute deal between Seattle and Philadelphia at price $321 is offered by Frontier from Sat, May 9 to Mon, May 11.

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.