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140 € Cheap Flights from Philadelphia International to Seattle

Compare Philadelphia International to Seattle flight deals

Find the cheapest month or even day of the year to fly to Seattle

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Flight deals from Philadelphia International to Seattle

Looking for a cheap last-minute deal or the best return flight from Philadelphia International Airport to Seattle? If you want to travel next month, return fares start from 154 €. Find the lowest prices on one-way and return tickets right here.
Seattle.140 € per passenger.Departing Tue, 8 Sep, returning Wed, 23 Sep.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Philadelphia International on Tue, 8 Sep, arriving in Seattle / Tacoma International.Inbound indirect flight with Frontier Airlines, departs from Seattle / Tacoma International on Wed, 23 Sep, arriving in Philadelphia International.Price includes taxes and charges.From 140 €, select.
Seattle.140 € per passenger.Departing Tue, 25 Aug, returning Wed, 16 Sep.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Philadelphia International on Tue, 25 Aug, arriving in Seattle / Tacoma International.Inbound indirect flight with Frontier Airlines, departs from Seattle / Tacoma International on Wed, 16 Sep, arriving in Philadelphia International.Price includes taxes and charges.From 140 €, select.
Seattle.154 € per passenger.Departing Thu, 20 Aug, returning Wed, 26 Aug.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Philadelphia International on Thu, 20 Aug, arriving in Seattle / Tacoma International.Inbound indirect flight with Frontier Airlines, departs from Seattle / Tacoma International on Wed, 26 Aug, arriving in Philadelphia International.Price includes taxes and charges.From 154 €, select.
Seattle.155 € per passenger.Departing Tue, 22 Sep, returning Fri, 9 Oct.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Philadelphia International on Tue, 22 Sep, arriving in Seattle / Tacoma International.Inbound indirect flight with Frontier Airlines, departs from Seattle / Tacoma International on Fri, 9 Oct, arriving in Philadelphia International.Price includes taxes and charges.From 155 €, select.
Seattle.200 € per passenger.Departing Sat, 7 Nov, returning Mon, 9 Nov.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Philadelphia International on Sat, 7 Nov, arriving in Seattle / Tacoma International.Inbound indirect flight with Southwest Airlines, departs from Seattle / Tacoma International on Mon, 9 Nov, arriving in Philadelphia International.Price includes taxes and charges.From 200 €, select.
Seattle.200 € per passenger.Departing Thu, 1 Oct, returning Sat, 10 Oct.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Philadelphia International on Thu, 1 Oct, arriving in Seattle / Tacoma International.Inbound indirect flight with Southwest Airlines, departs from Seattle / Tacoma International on Sat, 10 Oct, arriving in Philadelphia International.Price includes taxes and charges.From 200 €, select.
Seattle.227 € per passenger.Departing Fri, 4 Dec, returning Mon, 7 Dec.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Philadelphia International on Fri, 4 Dec, arriving in Seattle / Tacoma International.Inbound indirect flight with Southwest Airlines, departs from Seattle / Tacoma International on Mon, 7 Dec, arriving in Philadelphia International.Price includes taxes and charges.From 227 €, select.
Seattle.231 € per passenger.Departing Tue, 28 Jul, returning Thu, 20 Aug.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Philadelphia International on Tue, 28 Jul, arriving in Seattle / Tacoma International.Inbound indirect flight with Frontier Airlines, departs from Seattle / Tacoma International on Thu, 20 Aug, arriving in Philadelphia International.Price includes taxes and charges.From 231 €, select.
Seattle.240 € per passenger.Departing Wed, 22 Jul, returning Tue, 28 Jul.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Philadelphia International on Wed, 22 Jul, arriving in Seattle / Tacoma International.Inbound indirect flight with Frontier Airlines, departs from Seattle / Tacoma International on Tue, 28 Jul, arriving in Philadelphia International.Price includes taxes and charges.From 240 €, select.
Seattle.264 € per passenger.Departing Wed, 12 Aug, returning Tue, 13 Oct.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Philadelphia International on Wed, 12 Aug, arriving in Seattle / Tacoma International.Inbound indirect flight with Frontier Airlines, departs from Seattle / Tacoma International on Tue, 13 Oct, arriving in Philadelphia International.Price includes taxes and charges.From 264 €, select.
Seattle.271 € per passenger.Departing Mon, 26 Oct, returning Mon, 14 Dec.Return flight with United.Outbound indirect flight with United, departs from Philadelphia International on Mon, 26 Oct, arriving in Seattle / Tacoma International.Inbound indirect flight with United, departs from Seattle / Tacoma International on Mon, 14 Dec, arriving in Philadelphia International.Price includes taxes and charges.From 271 €, select.
Seattle.271 € per passenger.Departing Thu, 26 Nov, returning Thu, 3 Dec.Return flight with United.Outbound indirect flight with United, departs from Philadelphia International on Thu, 26 Nov, arriving in Seattle / Tacoma International.Inbound indirect flight with United, departs from Seattle / Tacoma International on Thu, 3 Dec, arriving in Philadelphia International.Price includes taxes and charges.From 271 €, select.
Seattle.272 € per passenger.Departing Thu, 29 Oct, returning Thu, 5 Nov.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Philadelphia International on Thu, 29 Oct, arriving in Seattle / Tacoma International.Inbound indirect flight with Southwest Airlines, departs from Seattle / Tacoma International on Thu, 5 Nov, arriving in Philadelphia International.Price includes taxes and charges.From 272 €, select.
Seattle.272 € per passenger.Departing Thu, 10 Sep, returning Sat, 5 Dec.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Philadelphia International on Thu, 10 Sep, arriving in Seattle / Tacoma International.Inbound indirect flight with Southwest Airlines, departs from Seattle / Tacoma International on Sat, 5 Dec, arriving in Philadelphia International.Price includes taxes and charges.From 272 €, select.
Seattle.279 € per passenger.Departing Thu, 17 Sep, returning Sat, 19 Sep.Return flight with Alaska Airlines.Outbound direct flight with Alaska Airlines departs from Philadelphia International on Thu, 17 Sep, arriving in Seattle / Tacoma International.Inbound direct flight with Alaska Airlines departs from Seattle / Tacoma International on Sat, 19 Sep, arriving in Philadelphia International.Price includes taxes and charges.From 279 €, select.
Seattle.282 € per passenger.Departing Tue, 13 Oct, returning Tue, 20 Oct.Return flight with Alaska Airlines.Outbound direct flight with Alaska Airlines departs from Philadelphia International on Tue, 13 Oct, arriving in Seattle / Tacoma International.Inbound direct flight with Alaska Airlines departs from Seattle / Tacoma International on Tue, 20 Oct, arriving in Philadelphia International.Price includes taxes and charges.From 282 €, select.

Find the cheapest month to fly from Philadelphia International to Seattle

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Philadelphia International to Seattle flights are currently cheapest in September.
Jul
from 240 €
Aug
from 154 €
Sep
from 140 €
Oct
from 200 €
Nov
from 200 €
Dec
from 227 €
Jan
from 294 €
Feb
from 302 €
Mar
from 305 €
Apr
from 304 €
May
from 288 €
Jun
Find prices

Direct flights from Philadelphia International to Seattle

Alternative Philadelphia International to Seattle routes

Looking for the cheapest, fastest or easiest route from Philadelphia International to Seattle? You could fly into the following airports instead.

Seattle Lake Union SPB

2km from central Seattle
Closest
from 761 €
Search flights

Seattle Boeing Fld

11km from central Seattle
from 545 €
Search flights

Seattle / Tacoma International

20km from central Seattle
Cheapest
from 140 €
Search flights

Paine Field

33km from central Seattle
from 407 €
Search flights

Philadelphia to Seattle: Flight information

The things to know before you go.
Cheapest flight found140 €
Cheapest month to flyAugust
Average flight time5 hrs, 58 mins
Most popular airlineQatar Airways
Average flights per week146

Finding cheap flights from Philadelphia International to Seattle: Frequently asked questions

There are 4 airports in Seattle: Seattle Lake Union SPB, Seattle Boeing Fld, Seattle / Tacoma International, and Paine Field.
The best price we found for a return flight from Philadelphia International to Seattle is 140 €. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
5 hours and 58 minutes is the average flight time from Philadelphia International to Seattle.
Qatar Airways, American Airlines and Alaska Airlines fly direct from Philadelphia International to Seattle.
As of July 2026, there are 73 flights per week flying from Philadelphia International to Seattle.
The cheapest month to fly from Philadelphia International to Seattle is usually August.
If you're flying from Philadelphia International Airport, the cheapest airport near Seattle is Seattle / Tacoma International – which is 19.5 km away from the centre of Seattle. We've found flights into this airport from 140 €.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Philadelphia International Airport to Seattle on Tuesday, 25 August 2026.
Yes – the average flight time is 5 hours and 58 minutes.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Seattle but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.

We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Seattle is around 40 days in advance, so don’t leave your flight to the last minute.

In July, the average temperature is usually around 17°C. August is typically the warmest month in Seattle, when it usually averages around 23°C. You can expect the least rain in July. The coldest month is December, with temperatures averaging 0°C. The rainiest month is November.
Currently, Frontier Airlines and Alaska Airlines offer the cheapest flight tickets to Seattle.

Flying from Philadelphia International Airport (PHL) to Seattle: what you need to know

  • Expect to be in the air for 5 hours 10 minutes. That's the average duration of a direct flight from Philadelphia International Airport to Seattle.

  • Seattle is three hours behind Philadelphia, where Philadelphia International Airport is located. Seattle observes the UTC-8 timezone.

  • Philadelphia International Airport (PHL) to Seattle-Tacoma International Airport (SEA) is the most traveled route. When booking your flight, you can pick from 29 services a week between PHL and SEA.

  • To avoid rushing for your PHL to Seattle flight, allow plenty of time for things like check-in and baggage drop. Arriving two hours before international departures and one hour before domestic flights is the general rule.

  • During popular months such as July, it's a good idea to get to the airport earlier than usual. Arrive two hours before domestic departures and four hours ahead of an international flight whenever you're flying during peak periods in general.

  • You can book a direct Philadelphia International Airport to Seattle ticket. Begin your journey at PHL and end it at Seattle-Tacoma International Airport (SEA).

  • There's a good selection of carriers that operate direct flights from Philadelphia International Airport to Seattle, such as:

  • Travelling from central Philadelphia to PHL takes around 30 minutes on public transport. If you ride-share, drive or grab a taxi, you'll cover the 11 kilometres in 20 minutes or so, depending on traffic.

  • Want a relaxed start to your journey? Stay near PHL. Whether you have an early flight from Philadelphia International Airport to Seattle or want to avoid feeling rushed, these hotels are all about convenience:

  • When it comes to Philadelphia International Airport's on-time performance, 77% of flights stick to their scheduled arrival time.

  • You'll find PHL at 8500 Essington Ave.

How to find the cheapest flights from Philadelphia International Airport (PHL) to Seattle

  • 80 € is the lowest price we've seen for a one-way Philadelphia International Airport to Seattle flight. A round-trip plane ticket right now is 140 €. Depending on when you want to go and the availability, these fares can change.

  • Booking early is often the key to locking in a cheap flight from PHL to Seattle. Prices tend to rise as demand increases, so the nearer your departure date, the more you'll likely spend on your ticket.

  • Finding cheap tickets from Philadelphia International Airport to Seattle is easier if you're flexible with your travel dates. Try using the 'Whole month' search tool to get the lowest prices across every month and score an epic deal.

  • Stay on top of deals for cheap flights from PHL to Seattle by setting up a Price Alert. You'll get an email or notification on the app when a new low fare is offered.

  • Tailor your flights with filters. Choose your departure and arrival times, airlines and total journey duration. You can also sort your results by 'Cheapest,' 'Fastest' or 'Best' flights from Philadelphia International Airport to Seattle.

Airports in Seattle

Seattle-Tacoma International Airport (SEA)

  • The distance from Seattle-Tacoma International Airport (SEA) to central Seattle is roughly 23 kilometres. It'll take you about 25 minutes to get to the centre driving.

  • If you're travelling on public transport, expect a journey time of about 35 minutes.

  • Consider staying in a hotel near SEA if you're coming in on a late flight from Philadelphia International Airport to Seattle. Pick one of these accommodation options and make your arrival easier:

  • Get the best deal by booking your ride from Seattle-Tacoma International Airport about one week before your flight from PHL to Seattle.

Seattle Paine Field International Airport (PAE)

  • Seattle Paine Field International Airport (PAE) is around 40 kilometres from central Seattle. Once you've disembarked your flight from Philadelphia International Airport to Seattle, it'll take you around 40 minutes to reach the heart of the city in a ride-share or taxi.

  • Public transport will get you there in around 1 hour 30 minutes.

  • Hang up the 'Do not disturb' sign and relax at a hotel near PAE. Here are a few options where you can settle in after your PHL to Seattle flight:

  • Generally speaking, the sooner you book, the better the deals and choice of vehicles. Secure your ride from PAE once your travel dates are set.

King County International Airport (BFI)

  • Hop off your flight from Philadelphia International Airport to Seattle and head straight for your hotel or jump right into sightseeing. The centre of Seattle is around 11 kilometres from King County International Airport (BFI) and usually takes 20 minutes to reach driving.

  • The journey will take you roughly 35 minutes when travelling on public transport.

  • Find a hotel near BFI and go from the plane to your bed in a flash. Whether you're coming in on a late PHL to Seattle flight or just want a stress-free arrival, these stays offer a quick route to a good night's sleep:

  • Booking at least a few weeks in advance of your flight from Philadelphia International Airport to Seattle is a smart move. Along with more affordable prices, you'll likely have a better variety of makes and models to choose from at BFI.

Best time to go to Seattle

  • It's time to plan your travel dates for your flight from Philadelphia International Airport to Seattle. July is the most popular month to visit Seattle. If you prefer a more relaxed vibe, go in December.

  • Before booking a Philadelphia International Airport to Seattle plane ticket, think about the kind of weather you prefer. August is the warmest month in Seattle, with temperatures ranging from 12ºC (54ºF) to 28ºC (82ºF).

  • February has average temperatures of between -1ºC (30ºF) and 11ºC (52ºF). Look for a cheap ticket from PHL to Seattle around that time if you'd rather travel in cooler conditions.

More about Seattle

  • After booking your flight from Philadelphia International Airport to Seattle, find a hotel that offers both comfort and a great location. Make one of these options your base for exploring Seattle:

  • Pike Place Market and Space Needle are just two of the major attractions to add to your Seattle itinerary. Keep the adventure rolling by checking out Seattle Skyline.

Explore more of the United States

  • Portland is just one of the many places in the United States waiting to be explored once you've seen the sights of Seattle. Around 241 kilometres away to the south, its top attractions include Portland Japanese Garden, Peninsula Park Rose Garden and Beyond Van Gogh Portland.

  • If you're looking to explore another great destination in the United States, head for Spokane, about 370 kilometres east of Seattle. Riverside State Park, Spokane Falls (Upper Falls) and Cathedral of Our Lady of Lourdes are highlights.

Plan the rest of your trip from Philadelphia to Seattle

Prices shown on this page are estimated lowest prices only. Found in the last 12 days.