Cheap flights from Philadelphia to Seattle (PHL - SEA)

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The best prices from Philadelphia to Seattle/Tacoma Intl are usually found in January or October, booked 59 days in advance, depart on a Tuesday or Wednesday and return on a Tuesday

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

All the information you need to plan the best PHL to SEA flight in 2022: compare Philadelphia to Seattle flight prices with the expected peak season, weather and rainfall in Seattle.
PHL - SEA
Price
$297 - $405
SEA
Temperature
41 - 66.2 °F
SEA
Rainfall
0.7 - 6.6 inches

Popular in

June

High demand for flights, 17% potential price rise

Cheapest in

January

Best time to find cheap flights, 11% potential price drop

Round-trip from

$297

From Philadelphia to Seattle/Tacoma Intl

One-way from

$168

One-way flight from Philadelphia to Seattle/Tacoma Intl

Flight route prices based on searches on Cheapflights within the last 3 days, monthly prices based on aggregated historical data.
How far in advance should I book a flight from Philadelphia to Seattle?

Users have found that booking a flight from Philadelphia to Seattle at least 49 days early can save you up to 17% on average compared to booking a flight this week. If booking 49 days before your flight isn’t an option for you, users have found flights from Philadelphia to Seattle for as little as $329 when booking for a departure date within the next two weeks. You can also check prices now. Some users have found airline tickets as low as $363 for flights departing within the next 3 days.

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

One of the essential ways to save on airfare from Philadelphia to Seattle is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the evening could potentially save you up to 32% on airfare.

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

Users have found that flying from Philadelphia to Seattle on a Saturday typically leans towards higher prices. However, this doesn’t mean you still can’t find a deal. Flexibility with other aspects of your flight can still land a great price for your trip.

Cheap flights from Philadelphia to Seattle in May, June 2022

The best prices found for PHL to SEA flights for May, June
27 May - 30 May
$449pp
PHL
Philadelphia
Multiple Airlines
 
1 STOP
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Frontier
 
1 STOP
PHL
Philadelphia
3 Jun - 7 Jun
$450pp
PHL
Philadelphia
Spirit Airlines
   
2 STOPS
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Spirit Airlines
   
2 STOPS
PHL
Philadelphia
3 Jun - 7 Jun
$458pp
PHL
Philadelphia
Spirit Airlines
   
2 STOPS
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Spirit Airlines
     
3 STOPS
PHL
Philadelphia

Philadelphia to Seattle 2022 flight deals

Cheap flights to Seattle from Philadelphia found for this year
13 Sep - 20 Sep
$276pp
PHL
Philadelphia
Delta
 
1 STOP
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Delta
 
1 STOP
PHL
Philadelphia
27 Sep - 31 Oct
$295pp
PHL
Philadelphia
Multiple Airlines
 
1 STOP
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
JetBlue
 
1 STOP
PHL
Philadelphia
16 Sep - 23 Sep
$296pp
PHL
Philadelphia
Delta
 
1 STOP
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Delta
 
1 STOP
PHL
Philadelphia

Non-stop flights to Seattle from Philadelphia

Save time with Philadelphia to Seattle direct flight deals
6 Oct - 12 Oct
$357pp
PHL
Philadelphia
Multiple Airlines
Non-Stop
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
American Airlines
Non-Stop
PHL
Philadelphia
28 Sep - 3 Oct
$358pp
PHL
Philadelphia
Alaska Airlines
Non-Stop
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Alaska Airlines
Non-Stop
PHL
Philadelphia
13 Sep - 17 Sep
$364pp
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
27 May - 30 May
$449pp
PHL
Philadelphia
Multiple Airlines
 
1 STOP
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Frontier
 
1 STOP
PHL
Philadelphia
27 May - 30 May
$471pp
PHL
Philadelphia
Frontier
   
2 STOPS
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Frontier
 
1 STOP
PHL
Philadelphia
25 May - 30 May
$485pp
PHL
Philadelphia
Frontier
 
1 STOP
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Frontier
   
2 STOPS
PHL
Philadelphia

One-way flights to Seattle/Tacoma Intl from Philadelphia

The cheapest one-way flights from Philadelphia to Seattle
4:42 am - 11:05 am
United Airlines
Nonstop
9h 23m
PHL - SEA
United Airlines
$168
United
3:15 am - 6:14 am
Alaska Airlines
Nonstop
5h 59m
PHL - SEA
Alaska Airlines
6:30 am - 5:05 pm
American Airlines
2 Stops
13h 35m
PHL - SEA
American Airlines

Related info for your journey

Useful info, stats and facts about <span class="emphasized">Philadelphia</span> to <span class="emphasized">Seattle</span> flights.

Flight FAQs

From Philadelphia to Seattle

What airports do I use to fly from Philadelphia to Seattle?

Booking a flight from Philadelphia (PHL) to Seattle/Tacoma Intl (SEA) is your only option if you wish to fly from Philadelphia to Seattle. On a typical day, there are 2 flights from Philadelphia to Seattle/Tacoma Intl, all of which are around 5h 59m for a nonstop flight. You can also purchase a plane ticket from 11 airlines when you book a flight from Philadelphia to Seattle.

Which airlines flying from Philadelphia to Seattle/Tacoma Intl have flexible cancellations due to COVID-19?

American Airlines, Alaska Airlines, and Delta are some of the carriers that may have flexible cancellation policies. You can use our site to filter for other airlines that may also have this kind of flexibility.

Can I find flights from Philadelphia to Seattle for under $300 on Cheapflights?

Yes, there are multiple flights from Philadelphia to Seattle for under $300. The cheapest flight booked recently is on Delta for just $276, but on average you can expect to pay $321.

Are there nonstop flights from Philadelphia to Seattle for under $400 on Cheapflights?

Cheapflights has at least 20 direct flights from Philadelphia to Seattle under $400. A good price for a nonstop flight from Philadelphia to Seattle is less than $409.

Are there last-minute flights available from Philadelphia to Seattle for under $500?

There are currently 20+ open flights from Philadelphia to Seattle within the next 7 days for less than $500.

What days are nonstop flights available from Philadelphia to Seattle?

Nonstop flights are available for this route on the following days: Monday, Tuesday, Thursday, Friday, Saturday.

How popular is this Philadelphia to Seattle flight route?

Flights from Philadelphia to Seattle/Tacoma Intl have been viewed 32 times in the past calendar month.

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

On average, you can expect to see 6 flights from Philadelphia to Seattle a day.
Morning (6am - Noon) - 17% of flight departures
Evening (6pm - Midnight) - 83% of flight departures

How long is the flight from Philadelphia to Seattle?

A quick flight from Philadelphia to Seattle can take about 5h 59m. Delta provides one of the quickest options available for as low as $276. The distance between Philadelphia and Seattle is about 2385 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

What are the cheapest airlines flying from Philadelphia to Seattle round-trip?

According to our current data, Delta ($276), United Airlines ($301), and Alaska Airlines ($358) offers the cheapest pricing from Philadelphia to Seattle. These flights start at 17% lower than the current average price 3 months from now.

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

One-way options have recently been found by users for as low as $138 on Delta. Other airlines that offer cheap prices include JetBlue from $157 and United Airlines from $168 one-way.

What are the most popular airlines that fly from Philadelphia to Seattle?

The most popular airlines flying from Philadelphia to Seattle are Major Airline, American Airlines and Alaska Airlines. Something to consider prior to booking your flight.

What are the cheapest flights from Philadelphia to Seattle?

While on average a flight from Philadelphia to Seattle is generally $1,063, our data shows the cheapest flight currently is $227. When looking at the most popular route, (Philadelphia - Seattle/Tacoma Intl), you can expect to pay $276 for that flight.

What are the most reliable airlines from Philadelphia to Seattle?

Consider American Airlines (92%), British Airways (89%) or Qatar Airways (83%) when booking your flight. These represent the most reliable airlines when flying from Philadelphia to Seattle.

COVID Restrictions

View COVID Travel Restrictions for Seattle, WA

Do I need a COVID test to fly to Seattle from Philadelphia?

Information is based on travel restrictions for travel to Seattle/Tacoma Intl within the United States

Most visitors from Philadelphia need to provide a negative COVID-19 test result and/or quarantine to enter Seattle/Tacoma Intl.

COVID-19 testing requirements
Visitors from Philadelphia must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 1 day for RT-PCR (NAAT) and 1 day for Antigen (quick-test) before departing to Seattle/Tacoma Intl.

Quarantine requirements
Visitors from Philadelphia are not required to quarantine after entering Seattle/Tacoma Intl.

Do I need a test to fly back to Philadelphia from Seattle?

Returning to Philadelphia from Seattle/Tacoma Intl

COVID-19 testing requirements
Visitors from Seattle/Tacoma Intl must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 1 day for RT-PCR (NAAT) and 1 day for Antigen (quick-test) before departing to Philadelphia.

Quarantine requirements
Visitors from Seattle/Tacoma Intl are not required to quarantine after entering Philadelphia.

Hide COVID Travel Restrictions for Seattle, WA

Alternative routes for Philadelphia to Seattle

See prices for flight routes from nearby airports that may be better suited for you.

Destination information for Seattle

Things to know before you go - useful duration and weather info for your trip from Philadelphia to Seattle.
Flight duration from PHL to SEA
5h 30m
Average temperature for May in Seattle
66.2 °F
Avg rainfall for May in Seattle
1.8 ″

Airports servicing Philadelphia

Airports servicing Seattle

Top 8 airlines flying from Philadelphia to Seattle/Tacoma Intl

The chart below displays the airlines Cheapflights users traveling from Philadelphia to Seattle choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
Airline Cheapest Average Flexibility On-time COVID-19 safety
Juneyao Airlines
$13 $20 No cancel fee 66%

We couldn't confirm the COVID-19 safety measures taken by Juneyao Airlines. Please check directly on their website for additional information.

Spirit Airlines
$82 $223 No cancel fee 65%
Frontier
$88 $184 No cancel fee 62%
Alaska Airlines
$147 $317 No cancel fee 75%
United Airlines
$154 $398 No cancel fee 69%
Delta
$164 $379 No cancel fee N/A
American Airlines
$168 $430 No cancel fee 71%
Sun Country Air
$185 $391 No cancel fee 83%

Hourly flight availability from Philadelphia to Seattle

See what time of day planes typically take off from Philadelphia towards Seattle.
Morning 6 AM to noon 72% of PHL to SEA departures
Afternoon Noon to 6 PM 27% 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
Weekly flight availability
from Philadelphia to Seattle
See how many times per day planes take to the skies headed from Philadelphia to Seattle.
Sunday
2 daily flights
Monday
2 daily flights
Tuesday
3 daily flights
Wednesday
4 daily flights
Thursday
1 daily flight
Friday
2 daily flights
Saturday
3 daily flights
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