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Cheap flights from Philadelphia to Seattle

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Cheap return flights

KAYAK's recommended return flight deals from the most popular airlines that fly from Philadelphia to Seattle.
American Airlines Logo
PHL-SEA
6h 02mdirect
American Airlines Logo
SEA-PHL
5h 11mdirect
American Airlines
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Qatar Airways Logo
PHL-SEA
5h 57mdirect
Qatar Airways Logo
SEA-PHL
5h 11mdirect
Qatar Airways
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Alaska Airlines Logo
PHL-SEA
5h 57mdirect
Alaska Airlines Logo
SEA-PHL
5h 11mdirect
Alaska Airlines
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Finnair Logo
PHL-SEA
5h 57mdirect
Finnair Logo
SEA-PHL
5h 10mdirect
Finnair
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Hawaiian Airlines Logo
PHL-SEA
5h 57mdirect
Hawaiian Airlines Logo
SEA-PHL
5h 11mdirect
Hawaiian Airlines
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Air Tahiti Nui Logo
PHL-SEA
5h 57mdirect
Air Tahiti Nui Logo
SEA-PHL
5h 11mdirect
Air Tahiti Nui
Find Deal

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How to get the cheapest flight ticket from Philadelphia to Seattle

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Seattle?

The cheapest month to fly to Seattle from Philadelphia is in February. Flight prices, which tend to average around R7 207, are often lower during this time because this is during the off-season. If you aren’t able to travel to Seattle during the month of February, then flying in March is also cheap. Prices for this month can be found on momondo for an average of R7 225.

What is the cheapest Philadelphia to Seattle/Tacoma Intl flight route?

Fly from Philadelphia to Seattle/Tacoma Intl for the best Philadelphia - Seattle/Tacoma Intl flight prices

How far in advance should I book a flight to Seattle?

You are more likely to see cheaper flights to Seattle from Philadelphia when booking 5 weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around R8 094 when searching 5 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from Philadelphia for as low as R7 281 on momondo.

What cabin class options are available on Philadelphia to Seattle/Tacoma Intl flights?

There are 1 cabin classes available to choose from on Philadelphia to Seattle/Tacoma Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

How have Philadelphia to Seattle flight prices changed over time?

As of April 2025, prices for Philadelphia to Seattle flights are approximately 21% cheaper when compared to flights at the same time last year.

When to book flights from Philadelphia to Seattle

Are you open to changing your travel dates? Check out the ideal times to fly from Philadelphia to Seattle according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap Philadelphia to Seattle (PHL to SEA) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Philadelphia to Seattle

Direct flights

None
There are no direct flights from Philadelphia to Seattle. There are no popular flight routes from Philadelphia to Seattle.

  • How far is Philadelphia to Seattle/Tacoma Intl by plane?

    The straight-line distance from Philadelphia to Seattle/Tacoma Intl is 3817,8 km.

  • When did momondo last update prices for flights from Philadelphia Airport to Seattle/Tacoma Intl Airport?

    Prices for flights from Philadelphia Airport to Seattle/Tacoma Intl Airport are refreshed on a daily basis.

  • How old do you have to be to fly from Philadelphia Airport to Seattle/Tacoma Intl Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and stopovers. It is recommended that you verify with the airline you are booking with for travel from Philadelphia Airport to Seattle/Tacoma Intl Airport.

  • What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

    The travel and health documents required for your trip to Seattle/Tacoma Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s licence, and a passport valid for six-months after you plan to arrive at Seattle/Tacoma Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular plane model from Philadelphia to Seattle?


Travelling to a place near Seattle?

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Tacoma

Why use momondo?

Why should I use momondo to find a flight deal from Philadelphia to Seattle?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Seattle from Philadelphia.

Can I find flights from Philadelphia to Seattle with flexible booking policies on momondo?

Flights from Philadelphia to Seattle with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Philadelphia to Seattle?

momondo helps you find the best flight between Philadelphia and Seattle by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Philadelphia to Seattle right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Philadelphia to Seattle now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Seattle and let you know when they change.


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