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Cheap Flights from Philadelphia 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 to Seattle? Find the lowest prices on one-way and return tickets right here.
Seattle.$223 per passenger.Departing Fri, 21 Feb, returning Mon, 24 Feb.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Philadelphia International on Fri, 21 Feb, arriving in Seattle / Tacoma International.Inbound indirect flight with Frontier Airlines, departs from Seattle / Tacoma International on Mon, 24 Feb, arriving in Philadelphia International.Price includes taxes and charges.From $223, select.
Seattle.$257 per passenger.Departing Thu, 12 Dec, returning Mon, 16 Dec.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Philadelphia International on Thu, 12 Dec, arriving in Seattle / Tacoma International.Inbound indirect flight with Frontier Airlines, departs from Seattle / Tacoma International on Mon, 16 Dec, arriving in Philadelphia International.Price includes taxes and charges.From $257, select.
Seattle.$262 per passenger.Departing Tue, 19 Nov, returning Sat, 23 Nov.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Philadelphia International on Tue, 19 Nov, arriving in Seattle / Tacoma International.Inbound indirect flight with Frontier Airlines, departs from Seattle / Tacoma International on Sat, 23 Nov, arriving in Philadelphia International.Price includes taxes and charges.From $262, select.
Seattle.$262 per passenger.Departing Sat, 22 Feb, returning Sat, 1 Mar.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Philadelphia International on Sat, 22 Feb, arriving in Seattle / Tacoma International.Inbound indirect flight with Frontier Airlines, departs from Seattle / Tacoma International on Sat, 1 Mar, arriving in Philadelphia International.Price includes taxes and charges.From $262, select.
Seattle.$346 per passenger.Departing Sun, 15 Dec, returning Thu, 2 Jan.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Philadelphia International on Sun, 15 Dec, arriving in Seattle / Tacoma International.Inbound indirect flight with Frontier Airlines, departs from Seattle / Tacoma International on Thu, 2 Jan, arriving in Philadelphia International.Price includes taxes and charges.From $346, select.
Seattle.$347 per passenger.Departing Sat, 16 Nov, returning Mon, 16 Dec.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Philadelphia International on Sat, 16 Nov, arriving in Seattle / Tacoma International.Inbound indirect flight with Frontier Airlines, departs from Seattle / Tacoma International on Mon, 16 Dec, arriving in Philadelphia International.Price includes taxes and charges.From $347, select.
Seattle.$415 per passenger.Departing Sun, 12 Jan, returning Tue, 14 Jan.Return flight with Spirit Airlines.Outbound indirect flight with Spirit Airlines, departs from Philadelphia International on Sun, 12 Jan, arriving in Seattle / Tacoma International.Inbound indirect flight with Spirit Airlines, departs from Seattle / Tacoma International on Tue, 14 Jan, arriving in Philadelphia International.Price includes taxes and charges.From $415, select.
Seattle.$490 per passenger.Departing Thu, 14 Nov, returning Tue, 7 Jan.Return flight with Frontier Airlines and Alaska Airlines.Outbound indirect flight with Frontier Airlines, departs from Philadelphia International on Thu, 14 Nov, arriving in Seattle / Tacoma International.Inbound indirect flight with Alaska Airlines, departs from Seattle / Tacoma International on Tue, 7 Jan, arriving in Philadelphia International.Price includes taxes and charges.From $490, 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 February.
Nov
from $262
Dec
from $256
Jan
from $414
Feb
from $223
Mar
from $564
Apr
from $569
May
from $566
Jun
from $571
Jul
from $622
Aug
from $569
Sep
from $571
Oct
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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.

Philadelphia to Seattle: Flight information

The things to know before you go.
Cheapest flight found$223
Cheapest month to flyFebruary
Average flight time6 hrs, 14 mins
Most popular airlineAir Tahiti Nui
Average flights per week50

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 Everett.
The best price we found for a return flight from Philadelphia International to Seattle is $223. 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.
6 hours and 14 minutes is the average flight time from Philadelphia International to Seattle.
Air Tahiti Nui, Hawaiian Airlines and American Airlines fly direct from Philadelphia International to Seattle.
As of November 2024, there are 50 flights per week flying from Philadelphia International to Seattle.
The cheapest month to fly from Philadelphia International to Seattle is usually November 2024.
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 $223.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Philadelphia International Airport to Seattle on Friday, 21 February 2025.
Yes – the average flight time is 6 hours and 14 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 November, the average temperature is usually around 6°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.

How to find cheap flights to Seattle from Philadelphia International

Looking for cheap tickets from Philadelphia International to Seattle? Here are a few tips on how to secure the best flight price and make your journey as smooth as possible.

  • Simply hit 'search'. From British Airways to international carriers like Emirates, we compare all major airlines along with the most popular online travel agents to find the cheapest plane tickets from Philadelphia International to Seattle. And with us there are no hidden fees - what you see is what you pay.
  • Compare flight deals to Seattle from Philadelphia International from over 1,000 providers. Then choose the cheapest or fastest plane tickets.
  • Flex your dates to find the best Philadelphia International-Seattle ticket prices. If you are flexible when it comes to your travel dates, use Skyscanner's 'Whole month' tool to find the cheapest month, and even day to fly to Seattle from Philadelphia International.
  • Set up a Price Alert. You can easily track the fare of your cheap Philadelphia International-Seattle flights by creating an alert. Whenever prices go down or up, you'll get an email or push notification to help make sure you get the best possible flight deal.
  • Fly without stops. Only interested in direct flights between Philadelphia International and Seattle? Make sure to tick 'Direct flights only' when performing a search. If there are direct flights available on the route, these will appear in the results.
  • Find the cheapest Business class flights from Philadelphia International and Seattle. We scour the internet for the best Business, Premium Economy and First Class flight fares to Seattle, too. Check the difference in price as you search – you might just chance upon a last-minute low fare. Note that not all cabin classes are available for every destination or airline.
  • Include nearby airports in your search. Widen your search for Philadelphia International to Seattle flight deals by selecting the "add nearby airports" option. This will allow you to see flight prices for all the nearest airports at your departure point and your destination and could help you save next time you travel.

    • Combine your flight to Seattle from Philadelphia International with hotels and car hire

    Once you've secured your cheap flight ticket from Philadelphia International to Seattle, discover the best prices and exclusive rates for hotels in Seattle or nearby. You can also compare hundreds of car hire companies in one go so that you get the best car hire price for your trip.


Plan the rest of your trip from Philadelphia to Seattle

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.