Price observed over the last 3 months for a round trip.
Compare all flight tickets and find cheap flights from Philadelphia to Seattle
The cheapest flights right now
Philadelphia – Seattle
Outbound – Nov 16, 2026
direct
6h 6m Return – Nov 23, 2026
direct
5h 6m $409
today
Philadelphia – Seattle
Outbound – Nov 16, 2026
direct
6h 10m Return – Nov 23, 2026
direct
5h 6m $408
today
Philadelphia – Seattle
Outbound – Nov 16, 2026
1 stop
8h 4m ORD
Return – Nov 22, 2026
direct
5h 5m $407
today
Philadelphia – Seattle
Outbound – Nov 15, 2026
direct
6h 24m Return – Nov 20, 2026
direct
5h 5m $398
2 days ago
* Prices are in USD per passenger, including taxes, for a round trip. Prices are based on searches carried out within the last 72 hours. Please note that availability and ticket prices are subject to change and should not be considered as the final price quoted.
Cheapest flight tickets
$272
Average price of a round trip
$364
Average flight ticket price recorded over the last 3 months for a round trip.
Flight duration
6h1
A flight from Philadelphia to Seattle takes on average 6h1.
Best time
June
According to user searches, the ideal month to go to Seattle is June.
Tips for finding a cheap flight from Philadelphia to Seattle
Check out our tips for booking your flight to Seattle (USA) from Philadelphia (USA) at the cheapest possible price.
Usually, the cheapest month to pick up a ticket on this route is January, with an average flight ticket price of $239 (calculation over the last two years). The most touristic season corresponds to the months of October, October and September.
For the cheapest flights, it is advisable to buy your ticket at least 36 days before the departure date.
The airline offering the cheapest flight tickets is Frontier Airlines. A ticket from the airline Frontier Airlines to Seattle costs on average $343.
The airlines that offer the most flights are American Airlines, Alaska Airlines and American Airlines.
Price of flight tickets from Philadelphia to Seattle
Here is some information and tips to know before booking your flight:
- Flight ticket prices range from $272 to $513
- The average price of a flight ticket is about $364
- Prices are lowest for stays in the month of January
- The month in which booking a ticket is cheaper is: October
info departure city :
Philadelphia, USA
airports :
Philadelphia International Airport (PHL)
Northeast Philadelphia Airport (PNE)
local time :
Philadelphia is a city in the country USA, the time zone is [[timezone]]. In Philadelphia, it is currently {fromLocalTime}, the temperature is on average 12°C, with a minimum of 8°C and a maximum of 17°C.
The city of Philadelphia (PHL) has 2 airport(s): Philadelphia International and Northeast Philadelphia
destination info :
Seattle, USA
airports :
Kenmore Air Harbor Spb. (LKE)
Seattle-Tacoma International Airport (SEA)
Renton Municipal Airport (RNT)
King County International Airport (BFI)
local time :
Seattle is in the country USA, the time zone is [[timezone]]. In Seattle, it is currently {toLocalTime}, the temperature is on average 14°C, with a minimum of 11°C and a maximum of 15°C.
The city of Seattle (SEA) has 4 airport(s): Kenmore Air Harbor Spb., Seattle-Tacoma, Renton and King County
Useful info about Seattle
What is the least touristic period to go to Seattle?
If you want to visit Seattle during the least touristic period, choose the month of June.
What is the most popular time to travel to Seattle?
In Seattle, the most popular month is October. It is during this period that the prices offered by airlines are also the highest.
When should I book my flight from Philadelphia to Seattle?
According to our data, it is recommended to book your flight 36 days before your departure. If you book your flight ticket 6 weeks before your departure, you may find a price below average. You can also choose morning flights that are 100% cheaper than afternoon and evening flights. The cheapest day to book a flight from Philadelphia to Seattle is Saturday.
What are the arrival and destination airports when traveling between Philadelphia and Seattle?
When you leave, you can leave from Philadelphia International, and you will arrive at Seattle-Tacoma.
How to reach Philadelphia airport from the city centre?
The airport Philadelphia International is located 12 km or Northeast Philadelphia is located 20 km from the city centre. You can access it by using public transportation, taking a taxi, or renting a car.
Are there other means of transportation to go from Philadelphia to Seattle?
Airplane is the only means of transportation listed on Liligo for this journey.
Are there big differences in weather between Philadelphia and Seattle?
In summer, the average temperature is 18°C in Seattle and 24°C in Philadelphia. The average rainfall in summer is 38 mm in Seattle and 129 mm in Philadelphia. In summer, it is warmer in Philadelphia and it rains less in Seattle. In winter, it is colder in Seattle and it rains more in Seattle.
