Cheap flights from Seattle to Philadelphia (SEA - PHL)

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The best prices from Seattle/Tacoma Intl to Philadelphia are usually found in August or March, booked 27 days in advance, depart on a Saturday or Wednesday and return on a Wednesday

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

All the information you need to plan the best SEA to PHL flight in 2021: compare Seattle to Philadelphia flight prices with the expected peak season, weather and rainfall in Philadelphia.
SEA - PHL
Price
$295 - $409
PHL
Temperature
33.8 - 78.8 °F
PHL
Precipitation
2.7 - 4.4 inches

Popular in

June

High demand for flights, 19% potential price rise

Cheapest in

August

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

Round-trip from

$295

From Seattle/Tacoma Intl to Philadelphia

One-way from

$99

One-way flight from Seattle/Tacoma Intl to Philadelphia

Flight route prices based on searches on Cheapflights within the last 3 days, monthly prices based on aggregated historical data.
What is the cheapest day to fly round-trip from Seattle to Philadelphia?

Leaving on a Friday is a viable option for saving on travel. Heavily demanded days of the week can typically drive up the prices you see. Booking your travel for a less competitive day can save up to 18% on the overall cost on flights from Seattle to Philadelphia.

What is the cheapest month to fly from Seattle to Philadelphia?

August is one of the best times of the year to fly to Philadelphia from Seattle. Prices for August average $332 per person but you can even find prices for as low as $174. The most expensive prices can be found in the month of June. Opting for a August flight can save you 23% on your journey compared to booking in August

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

To save on the cost of your flight from Seattle to Philadelphia, book at least 26 days before your planned departure. Booking around this time can save you about 29% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $337 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $416.

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

A simple way to save on the total cost of your ticket is to fly from Seattle to Philadelphia in the afternoon. If you’re flexible enough to do this you can expect to save up to 40% on your trip compared to booking a flight in the evening.

Cheap flights from Seattle to Philadelphia in December, January 2022

The best prices found for SEA to PHL flights for December, January
8 Jan - 12 Jan
$120pp
SEA
Seattle/Tacoma Intl
Frontier
 
1 STOP
PHL
Philadelphia
PHL
Philadelphia
Frontier
 
1 STOP
SEA
Seattle/Tacoma Intl
22 Jan - 28 Jan
$147pp
SEA
Seattle/Tacoma Intl
Frontier
 
1 STOP
PHL
Philadelphia
PHL
Philadelphia
Frontier
 
1 STOP
SEA
Seattle/Tacoma Intl
8 Jan - 12 Jan
$150pp
SEA
Seattle/Tacoma Intl
Multiple Airlines
   
2 STOPS
PHL
Philadelphia
PHL
Philadelphia
Frontier
 
1 STOP
SEA
Seattle/Tacoma Intl

Seattle/Tacoma Intl to Philadelphia 2022 flight deals

Cheap flights to Philadelphia from Seattle found for this year
11 Dec - 8 Jan
$248pp
SEA
Seattle/Tacoma Intl
Multiple Airlines
 
1 STOP
PHL
Philadelphia
PHL
Philadelphia
Multiple Airlines
   
2 STOPS
SEA
Seattle/Tacoma Intl
7 Dec - 10 Dec
$249pp
SEA
Seattle/Tacoma Intl
Multiple Airlines
 
1 STOP
PHL
Philadelphia
PHL
Philadelphia
Frontier
 
1 STOP
SEA
Seattle/Tacoma Intl
14 Dec - 8 Jan
$250pp
SEA
Seattle/Tacoma Intl
Multiple Airlines
 
1 STOP
PHL
Philadelphia
PHL
Philadelphia
American Airlines
Non-Stop
SEA
Seattle/Tacoma Intl

Non-stop flights to Philadelphia from Seattle

Save time with Seattle to Philadelphia direct flight deals
11 Jan - 19 Jan
$197pp
SEA
Seattle/Tacoma Intl
Alaska Airlines
Non-Stop
PHL
Philadelphia
PHL
Philadelphia
Alaska Airlines
Non-Stop
SEA
Seattle/Tacoma Intl
12 Jan - 16 Jan
$227pp
SEA
Seattle/Tacoma Intl
Alaska Airlines
Non-Stop
PHL
Philadelphia
PHL
Philadelphia
Alaska Airlines
Non-Stop
SEA
Seattle/Tacoma Intl
8 Jan - 12 Jan
$247pp
SEA
Seattle/Tacoma Intl
American Airlines
Non-Stop
PHL
Philadelphia
PHL
Philadelphia
American Airlines
Non-Stop
SEA
Seattle/Tacoma Intl

Last minute flights from Seattle to Philadelphia

Late deals on round-trip flights to Philadelphia from Seattle, departing today and this week
11 Dec - 8 Jan
$248pp
SEA
Seattle/Tacoma Intl
Multiple Airlines
 
1 STOP
PHL
Philadelphia
PHL
Philadelphia
Multiple Airlines
   
2 STOPS
SEA
Seattle/Tacoma Intl
7 Dec - 10 Dec
$249pp
SEA
Seattle/Tacoma Intl
Multiple Airlines
 
1 STOP
PHL
Philadelphia
PHL
Philadelphia
Frontier
 
1 STOP
SEA
Seattle/Tacoma Intl
7 Dec - 10 Dec
$261pp
SEA
Seattle/Tacoma Intl
Multiple Airlines
     
3 STOPS
PHL
Philadelphia
PHL
Philadelphia
Frontier
 
1 STOP
SEA
Seattle/Tacoma Intl

One-way flights to Philadelphia from Seattle

The cheapest one-way flights from Seattle to Philadelphia
2:25 am - 10:34 am
Alaska Airlines
Nonstop
5h 09m
SEA - PHL
Alaska Airlines
10:10 am - 7:42 pm
Delta
1 Stop
6h 32m
SEA - PHL
Delta
$108
Delta
4:56 am - 1:36 am
Frontier
1 Stop
17h 40m
SEA - PHL
Frontier
$111
Kiwi.com

Related info for your journey

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

Flight FAQs

From Seattle to Philadelphia

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

To fly from Seattle to Philadelphia, you need to book a flight from Seattle/Tacoma Intl (SEA) to Philadelphia (PHL). Nonstop flights to Philadelphia from Seattle/Tacoma Intl take 4h 55m on average. When it comes time to book airfare, you have a few options: there are 2 outbound flights from Seattle/Tacoma Intl to Philadelphia offered by 9 different airlines.

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

Some of our airline partners flying from Seattle/Tacoma Intl to Philadelphia have new flexible policies in place due to COVID-19. American Airlines, Alaska Airlines, and Spirit Airlines are some of the carriers where you may find flexible cancellation policies. You can use our site to filter for airlines like American Airlines with this kind of flexibility.

Can I find flights from Seattle to Philadelphia for under $200 on Cheapflights?

Yes, there are multiple flights from Seattle to Philadelphia for under $200. The cheapest flight booked recently is on Frontier for just $120, but on average you can expect to pay $161.

Are there nonstop flights from Seattle to Philadelphia for under $200 on Cheapflights?

Cheapflights has at least 20 direct flights from Seattle to Philadelphia under $200. A good price for a nonstop flight from Seattle to Philadelphia is less than $330.

Are there last-minute flights available from Seattle to Philadelphia for under $300?

There are currently 20+ open flights from Seattle to Philadelphia within the next 7 days for less than $300.

What days are nonstop flights available from Seattle to Philadelphia?

Nonstop flights can be found on the following days: Monday, Tuesday, Friday.

How popular is this Seattle to Philadelphia flight route?

Flights from Seattle/Tacoma Intl to Philadelphia have been viewed 67 times in the past calendar month.

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

On average 4 flights depart from Seattle to Philadelphia per day.
Morning (6am - Noon) - 100% of flight departures

How long is the flight from Seattle to Philadelphia?

Airlines like Frontier and Spirit Airlines fly from Seattle to Philadelphia in about 17h 32m. The time it takes to get you to your destination can typically vary by up to 2h 04m. Seattle and Philadelphia are separated by a distance of 2385 mi. This flight may include one or multiple stops.

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

Currently priced at $120, Frontier will fly you from Seattle to Philadelphia and back. In addition to Frontier, many other airlines offer competitively priced options for your trip. Check Cheapflights for deals on Spirit Airlines for as low as $182. Frontier is currently priced 63% below the average price you’ll pay for this route.

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

One-way options have recently been found by users for as low as $53 on Frontier. Other airlines that offer cheap prices include Spirit Airlines from $92 and Alaska Airlines from $99 one-way.

What are the cheapest flights from Seattle to Philadelphia?

Looking at all options, your cheapest flight can be booked for $64. While the most popular route (Seattle/Tacoma Intl - Philadelphia) can be booked for $150 on average our data indicates $707 when flying from Seattle to Philadelphia.

What are the most reliable airlines from Seattle to Philadelphia?

No one likes to see their flight delayed. When booking a flight from Seattle to Philadelphia consider choosing Alaska Airlines (87%), American Airlines (84%) or Qatar Airways (80%) as they are the most reliable in getting you off to your destination on time.

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

Major Airline, American Airlines and Alaska Airlines are the most popular airlines when flying from Seattle to Philadelphia.

COVID Restrictions

View COVID Travel Restrictions for Philadelphia, PA

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

Information is based on travel restrictions for travel to Philadelphia within the United States

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

COVID-19 testing requirements
Visitors from Seattle/Tacoma Intl must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 72 hours before departing to Philadelphia.

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

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

Returning to Seattle/Tacoma Intl from Philadelphia

COVID-19 testing requirements
Visitors from Philadelphia must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 72 hours before departing to Seattle/Tacoma Intl.

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

Hide COVID Travel Restrictions for Philadelphia, PA

Alternative routes for Seattle to Philadelphia

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

Destination information for Philadelphia

Things to know before you go - useful duration and weather info for your trip from Seattle to Philadelphia.
Flight duration from SEA to PHL
5h 39m
Average temperature for December in Philadelphia
48.2 °F
Avg rainfall for December in Philadelphia
3.5 ″

Airports servicing Seattle

Airports servicing Philadelphia

Top 8 airlines flying from Seattle/Tacoma Intl to Philadelphia

The chart below displays the airlines Cheapflights users traveling from Seattle to Philadelphia 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
Spirit Airlines
$96 $205 No cancel fee 65%
Frontier
$117 $240 No cancel fee 62%
Sun Country Air
$118 $260 No cancel fee 83%
Delta
$137 $328 No cancel fee N/A
United Airlines
$139 $326 No cancel fee 69%
JetBlue
$157 $290 No cancel fee 62%
Alaska Airlines
$158 $375 No cancel fee 75%
American Airlines
$170 $402 No cancel fee 71%

Hourly flight availability from Seattle to Philadelphia

See what time of day planes typically take off from Seattle towards Philadelphia.
Morning 6 AM to noon 100% of SEA to PHL departures
Early morning Midnight to 6 AM 0% of SEA to PHL departures
Afternoon Noon to 6 PM 0% of SEA to PHL departures
Evening 6 PM to midnight 0% of SEA to PHL departures
Midnight
6 AM
Noon
6 PM
Weekly flight availability
from Seattle to Philadelphia
See how many times per day planes take to the skies headed from Seattle to Philadelphia.
Sunday
2 daily flights
Monday
3 daily flights
Tuesday
1 daily flight
Wednesday
3 daily flights
Thursday
3 daily flights
Friday
3 daily flights
Saturday
0 flights
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