Cheap flights from Seattle to Philadelphia

Round-trip
Economy
Seattle (SEA)
Philadelphia (PHL)
Depart
Return
Any month
Compare vs. Cheapflights |

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

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
C$ 373 - C$ 517
PHL
Temperature
1 - 26 °C
PHL
Precipitation
69 - 112 mm

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

$373

From Seattle/Tacoma Intl to Philadelphia

One-way from

C$ 193

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?

Users have found that leaving on a Wednesday can be a cost-effective option. It’s possible to save up to 59% on your flight compared to booking on days when demand is much higher.

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

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 26 days in advance, which can save you up to 29% on flights from Seattle to Philadelphia compared to booking the week you need them. Waiting 26 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at C$ 426. For sooner than that we have options available in the next 3 days from C$ 526.

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

Flights from Seattle to Philadelphia lean towards being more expensive in June. Prices are generally better when you fly from Seattle to Philadelphia in August, with the cheapest ticket starting at C$ 220.

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

One of the essential ways to save on airfare from Seattle to Philadelphia is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight at noon could potentially save you up to 52% on airfare.

Cheap flights from Seattle to Philadelphia in September, October 2021

The best prices found for SEA to PHL flights for September, October
26 Oct - 2 Nov
C$ 161pp
SEA
Seattle/Tacoma Intl
Spirit Airlines
   
2 STOPS
PHL
Philadelphia
PHL
Philadelphia
Spirit Airlines
     
3 STOPS
SEA
Seattle/Tacoma Intl
13 Oct - 20 Oct
C$ 176pp
SEA
Seattle/Tacoma Intl
Spirit Airlines
   
2 STOPS
PHL
Philadelphia
PHL
Philadelphia
Spirit Airlines
     
3 STOPS
SEA
Seattle/Tacoma Intl
12 Oct - 20 Oct
C$ 177pp
SEA
Seattle/Tacoma Intl
Spirit Airlines
   
2 STOPS
PHL
Philadelphia
PHL
Philadelphia
Spirit Airlines
     
3 STOPS
SEA
Seattle/Tacoma Intl

Seattle/Tacoma Intl to Philadelphia 2021 flight deals

Cheap flights to Philadelphia from Seattle found for this year
26 Oct - 2 Nov
C$ 161pp
SEA
Seattle/Tacoma Intl
Spirit Airlines
   
2 STOPS
PHL
Philadelphia
PHL
Philadelphia
Spirit Airlines
     
3 STOPS
SEA
Seattle/Tacoma Intl
13 Oct - 20 Oct
C$ 176pp
SEA
Seattle/Tacoma Intl
Spirit Airlines
   
2 STOPS
PHL
Philadelphia
PHL
Philadelphia
Spirit Airlines
     
3 STOPS
SEA
Seattle/Tacoma Intl
12 Oct - 20 Oct
C$ 177pp
SEA
Seattle/Tacoma Intl
Spirit Airlines
   
2 STOPS
PHL
Philadelphia
PHL
Philadelphia
Spirit Airlines
     
3 STOPS
SEA
Seattle/Tacoma Intl

Direct flights to Philadelphia from Seattle

Save time with Seattle to Philadelphia direct flight deals
26 Oct - 17 Nov
C$ 350pp
SEA
Seattle/Tacoma Intl
Alaska Airlines
Direct
PHL
Philadelphia
PHL
Philadelphia
Alaska Airlines
Direct
SEA
Seattle/Tacoma Intl
25 Dec - 4 Jan
C$ 363pp
SEA
Seattle/Tacoma Intl
Alaska Airlines
Direct
PHL
Philadelphia
PHL
Philadelphia
Alaska Airlines
Direct
SEA
Seattle/Tacoma Intl
24 Oct - 20 Nov
C$ 376pp
SEA
Seattle/Tacoma Intl
Alaska Airlines
Direct
PHL
Philadelphia
PHL
Philadelphia
Alaska Airlines
Direct
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
2 Oct - 7 Oct
C$ 212pp
SEA
Seattle/Tacoma Intl
Spirit Airlines
 
1 STOP
PHL
Philadelphia
PHL
Philadelphia
Spirit Airlines
     
3 STOPS
SEA
Seattle/Tacoma Intl
7 Oct - 12 Oct
C$ 467pp
SEA
Seattle/Tacoma Intl
Delta
 
1 STOP
PHL
Philadelphia
PHL
Philadelphia
Delta
 
1 STOP
SEA
Seattle/Tacoma Intl
7 Oct - 11 Oct
C$ 492pp
SEA
Seattle/Tacoma Intl
Delta
 
1 STOP
PHL
Philadelphia
PHL
Philadelphia
Delta
 
1 STOP
SEA
Seattle/Tacoma Intl

One-way flights to Philadelphia from Seattle

The cheapest one-way flights from Seattle to Philadelphia
6:35 p.m. - 8:40 a.m.
JetBlue
1 stop
11h 05m
SEA - PHL
JetBlue
C$ 193
9:22 a.m. - 7:55 p.m.
Delta
1 stop
7h 33m
SEA - PHL
Delta
C$ 654
Delta
4:07 a.m. - 12:15 p.m.
Alaska Airlines
Direct
5h 08m
SEA - PHL
Alaska Airlines
C$ 1,516
Alaska Airlines

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?

If you book a flight from Seattle to Philadelphia, you will be flying from Seattle/Tacoma Intl to Philadelphia. Flights to Philadelphia (PHL) from Seattle/Tacoma Intl (SEA) take 7h 32m for a nonstop flight. There are 4 flights from Seattle/Tacoma Intl to Philadelphia per day from 4 airlines.

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

American Airlines, Alaska Airlines, and Spirit Airlines 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 Seattle to Philadelphia for under C$ 200 on Cheapflights?

Yes, there are multiple flights from Seattle to Philadelphia for under C$ 200. The cheapest flight booked recently is on Spirit Airlines for just C$ 161, but on average you can expect to pay C$ 272.

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

Cheapflights has 19 direct flights from Seattle to Philadelphia under C$ 400. A good price for a direct flight from Seattle to Philadelphia is less than C$ 593.

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

There are currently 19+ open flights from Seattle to Philadelphia within the next 7 days for less than C$ 300.

What days are direct flights available from Seattle to Philadelphia?

Direct flights are available for this route on the following days: Monday, Friday.

How popular is this Seattle to Philadelphia flight route?

This flight path from Seattle/Tacoma Intl to Philadelphia was viewed by 14 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

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

On average, you can expect to see 3 flights from Seattle to Philadelphia a day.
Morning (6am - Midday) - 100% of flight departures

How long is the flight from Seattle to Philadelphia?

For as low as C$ 161, Spirit Airlines can have you in Philadelphia from Seattle in 5h 07m. Seattle and Philadelphia are separated by a distance of 3838 km. This flight may include one or multiple stops.

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

Our cheapest airline available from Seattle to Philadelphia is Spirit Airlines. Our recent data shows that you can find tickets from as low as C$ 161 on this airline. Additional options worth looking into are Alaska Airlines and Delta, starting at C$ 350 and C$ 358 round-trip. Spirit Airlines is currently priced 61% 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 C$ 176 on Alaska Airlines. Other airlines that offer cheap prices include JetBlue from C$ 187 and Delta from C$ 212 one-way.

What are the most reliable airlines from Seattle to Philadelphia?

Before booking your flight to Philadelphia from Seattle, check out the most reliable airlines to get you to your destination on time: Alaska Airlines (94%), Qatar Airways (90%), American Airlines( 83%).

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

Consider American Airlines, Alaska Airlines or Frontier when booking your flight. These represent the most popular airlines when flying from Seattle to Philadelphia.

What are the cheapest flights from Seattle to Philadelphia?

Looking for the cheapest flight from Seattle to Philadelphia? While on average our users pay C$ 253, our data indicates the cheapest price to be C$ 20. The most popular route (Seattle/Tacoma Intl - Philadelphia), is priced around C$ 446.

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) 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

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 38m
Average temperature for September in Philadelphia
27.0 °C
Avg rainfall for September in Philadelphia
109.0 mm

Airports servicing Seattle

Airports servicing Philadelphia

Top 3 airlines flying from Seattle/Tacoma Intl to Philadelphia

The chart below displays the airlines Cheapflights users travelling 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
C$ 140 C$ 329 No cancel fee 65%
Search Spirit Airlines flights
Alaska Airlines
C$ 197 C$ 445 No cancel fee 75%
Search Alaska Airlines flights
American Airlines
C$ 248 C$ 443 No cancel fee 71%
Search American Airlines flights

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 93% of flight departures
Evening 6 PM to midnight 6% of flight departures
Early morning Midnight to 6 AM 1% of flight departures
Afternoon Noon to 6 PM 0% of flight 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
6 daily flights
Monday
5 daily flights
Tuesday
2 daily flights
Wednesday
4 daily flights
Thursday
5 daily flights
Friday
6 daily flights
Saturday
5 daily flights
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