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Cheap flights from Philadelphia to Seattle (PHL - SEA)

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How to find the cheapest flight from
Philadelphia (PHL) to Seattle (SEA)

What is the cheapest day to fly round-trip from Philadelphia to Seattle?

Saturday flights are generally found to be more expensive for flights from Philadelphia to Seattle. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to Seattle.

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

To save up to 58% on this flight, we recommend booking at least 27 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from Philadelphia to Seattle from $136 1-2 weeks out and tickets from $197 for flights departing within the next 72 hours.

When is the cheapest time to fly from Philadelphia to Seattle (PHL - 03A)?

Unlike in the afternoon, when flights are generally more expensive, you can save up to 24% on flights from Philadelphia to Seattle by exploring options for tickets in the evening.

Cheap flights from Philadelphia to Seattle in August, September 2020

The best prices found for PHL to SEA flights for August, September
31 Jul - 3 Aug
$84pp
PHL
Philadelphia
Spirit Airlines
   
2 STOPS
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Spirit Airlines
   
2 STOPS
PHL
Philadelphia
1 Aug - 3 Aug
$86pp
PHL
Philadelphia
Spirit Airlines
   
2 STOPS
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Spirit Airlines
   
2 STOPS
PHL
Philadelphia
25 Jul - 29 Jul
$87pp
PHL
Philadelphia
Spirit Airlines
   
2 STOPS
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Spirit Airlines
   
2 STOPS
PHL
Philadelphia

Philadelphia to Seattle 2020 flight deals

Cheap flights to Seattle from Philadelphia found for this year
31 Jul - 3 Aug
$84pp
PHL
Philadelphia
Spirit Airlines
   
2 STOPS
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Spirit Airlines
   
2 STOPS
PHL
Philadelphia
1 Aug - 3 Aug
$86pp
PHL
Philadelphia
Spirit Airlines
   
2 STOPS
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Spirit Airlines
   
2 STOPS
PHL
Philadelphia
25 Jul - 29 Jul
$87pp
PHL
Philadelphia
Spirit Airlines
   
2 STOPS
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Spirit Airlines
   
2 STOPS
PHL
Philadelphia

Non-stop flights to Seattle from Philadelphia

Save time with Philadelphia to Seattle direct flight deals
5 Oct - 18 Oct
$269pp
PHL
Philadelphia
Multiple Airlines
Non-Stop
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
American Airlines
Non-Stop
PHL
Philadelphia
5 Sep - 12 Sep
$299pp
PHL
Philadelphia
Multiple Airlines
Non-Stop
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
American Airlines
Non-Stop
PHL
Philadelphia
14 Aug - 16 Sep
$309pp
PHL
Philadelphia
Multiple Airlines
Non-Stop
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
American Airlines
Non-Stop
PHL
Philadelphia

Last minute flights from Philadelphia to Seattle

Late deals on round-trip flights to Seattle from Philadelphia, departing today and this week
25 Jul - 28 Jul
$87pp
PHL
Philadelphia
Spirit Airlines
   
2 STOPS
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Spirit Airlines
   
2 STOPS
PHL
Philadelphia
27 Jul - 2 Aug
$110pp
PHL
Philadelphia
Multiple Airlines
 
1 STOP
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Spirit Airlines
   
2 STOPS
PHL
Philadelphia
25 Jul - 2 Aug
$116pp
PHL
Philadelphia
Spirit Airlines
   
2 STOPS
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Spirit Airlines
   
2 STOPS
PHL
Philadelphia

One-way flights to Seattle from Philadelphia

The cheapest one-way flights from Philadelphia to Seattle
2:26 pm - 4:41 am
Multiple Airlines
1 Stop
17h 15m
PHL - SEA
Multiple Airlines
$67
Kiwi.com
3:00 am - 2:49 pm
Spirit Airlines
2 Stops
14h 49m
PHL - SEA
Spirit Airlines
$39
FlightNetwork
2:00 am - 2:59 pm
Spirit Airlines
2 Stops
15h 59m
PHL - SEA
Spirit Airlines
$44
FlightNetwork

Related info for your journey

Useful info, stats and facts about Philadelphia to Seattle flights.

Flight FAQs

From Philadelphia to Seattle

Are flight prices decreasing from Philadelphia to Seattle due to COVID-19 (coronavirus)?

At this time, Cheapflights has noticed price decreases for many domestic flights due to COVID-19. Travel is not necessarily recommended at this time, and flights may be prone to cancellation: please check with local authorities in both Philadelphia and Seattle for travel alerts, and be sure to review the airline's cancellation policy and travel advisories before booking. For more information, please view our post on what to know about COVID-19 (coronavirus) and travel.

Can I find flights from Philadelphia to Seattle for under $100 on Cheapflights?

Yes, there are multiple flights from Philadelphia to Seattle for under $100. The cheapest flight booked recently is on Spirit Airlines for just $84, but on average you can expect to pay $109.

Are there nonstop flights from Philadelphia to Seattle for under $300 on Cheapflights?

Cheapflights has at least 6 direct flights from Philadelphia to Seattle under $300. A good price for a nonstop flight from Philadelphia to Seattle is less than $406.

Are there last-minute flights available from Philadelphia to Seattle for under $100?

There are currently 20+ open flights from Philadelphia to Seattle within the next 7 days for less than $100.

How many flights depart from Philadelphia to Seattle on average per day?

3 flight departures from Philadelphia to Seattle per day on average.
Afternoon (Noon - 6pm) - 100% of flight departures

Is Philadelphia weather warmer or cooler than Seattle?

With an average temperature of 88 °F, peak weather can be found in July. As a traveler, expect to see changes in flight prices during that period. The temperatures in Seattle are colder than in Philadelphia.

How long is the flight from Philadelphia to Seattle?

Spirit Airlines can get you from Philadelphia to Seattle in just under 12h 15m. Your travel time can differ by up to . The distance from Philadelphia to Seattle is about 2385 mi.

What is the cheapest airline to fly from Philadelphia to Seattle round-trip?

Flying on Spirit Airlines is currently your cheapest option to Seattle, with prices starting at $84.

What are the cheapest airlines to fly from Philadelphia to Seattle one-way?

To fly one-way, consider booking your trip with Spirit Airlines, which is currently one of the cheapest options available, starting at $39.

Alternative routes for Philadelphia to Seattle

Destination information for Seattle

Things to know before you go. Useful info for your trip from Philadelphia to Seattle
Average temperature for August in Seattle
77.0 °F
Avg rainfall for August in Seattle
1.1 ″

Airports servicing Philadelphia

Airports servicing Seattle

Seattle King County/Boeing (BFI)
Seattle Lake Union Spb (LKE)

Hourly flight availability from Philadelphia to Seattle

Morning 6 AM to noon 63% of PHL to SEA departures
Afternoon Noon to 6 PM 36% of PHL to SEA departures
Early morning Midnight to 6 AM 1% of PHL to SEA departures
Evening 6 PM to midnight 0% of PHL to SEA departures
Midnight
6 AM
Noon
6 PM
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