Helping travelers to find the best flight offers
A direct flight is the most convenient and comfortable way to fly from Philadelphia to Seattle, despite the fact that sometimes flights with transfers can cost significantly less.
A direct flight is the easiest way to get to your destination. The following airlines operate non-stop flights from Philadelphia to Seattle:
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We keep tight track on airlines' pre-holidays sales and other special offers occurences all the time to let you save maximum amount of funds while traveling to your family or just going out on vacation.
Looking for cheap flights from Philadelphia to Seattle? Look no further! Our air ticket search website offers the best rates on flights from Philadelphia to Seattle, ensuring you save big on your travel expenses. With our user-friendly interface, you can easily compare different airlines and book the most affordable tickets available. Whether you're planning a business trip or a vacation, our website provides the most up-to-date information on flight schedules and prices. Don't miss out on the chance to visit the stunning Emerald City without breaking the bank. Start your search now and discover the cheapest flights from Philadelphia to Seattle with just a few clicks.
The cheapest one-way flight from Philadelphia to Seattle departs on 05/05/2026, is operated by Southwest Airlines and costs $174
The cheapest roundtrip flight from Philadelphia to Seattle departs on 01/05/2026, is operated by Southwest Airlines and costs $186
Fastest flight from Philadelphia to Seattle takes 6h 1m
There are direct flights on this route 1 day a week: Su
The distance between Philadelphia and Seattle is 3819km (2368 miles). The average flight duration is 6h 23m. There are 40 direct flights from Philadelphia to Seattle. The time difference between Philadelphia and Seattle is 3h. Flights from Philadelphia begin at 7:02 AM. The latest flight from Philadelphia departs at 7:12 PM
The route Philadelphia — Seattle is served by many carriers — 4 in total, including United Airlines, Alaska Airlines, Southwest Airlines, and Frontier Airlines. This gives passengers wide opportunities: from finding the lowest fare (from $174) to selecting flights by schedule or service class. Our service aggregates data from multiple booking systems so you can compare offers in one place. This saves time and money: no need to check dozens of sites — just pick the right option and book online.
Starting at $536
Starting at $187
Starting at $174
Starting at $197
Philadelphia — Seattle
12/13/2025
Departure
Direct flight
UA2131
Starting at $536
Philadelphia — Seattle
05/05/2026
Departure
Direct flight
AS442
Starting at $258
Philadelphia — Seattle
05/11/2026
Departure
Direct flight
AS370
Starting at $393
Philadelphia — Seattle
12/31/2025
Departure
Direct flight
AS6275
Starting at $282
Philadelphia — Seattle
01/01/2026
Departure
Direct flight
AS6275
Starting at $436
Philadelphia — Seattle
09/20/2026
Departure
Direct flight
AS442
Starting at $187
Alaska Airlines
Every day
Starting at $414
We couldn't find any special offers for flights from Philadelphia to Seattle
The cheapest flight ticket from Philadelphia to Seattle according to data for the last 48 hours costs $174
Often the best time to buy tickets from Philadelphia to Seattle is 2 months before departure.
The fastest flights from Philadelphia to Seattle start from 6 hours 1 minute in the air.
The following airlines operate direct flights on the route Philadelphia — Seattle: United Airlines, Alaska Airlines
We carefully collect statistics on the search and pricing of airlines and, based on these data, we make an assumption about future prices. Thus, you can better understand which season is the cheapest to fly from Philadelphia to Seattle