There are most likely no direct flights on the Philadelphia — Seattle route
Flaut.Travel was designed and developed by a team dedicated to making the process of searching, comparing and booking airline tickets as easy and convenient as possible. Our service helps travelers to find and buy the cheapest flights from Philadelphia to Seattle. We have connected more than 40 airlines and airline ticketing agencies to help you find the most suitable and affordable flight option.
A non-stop 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.
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Answers to questions about the route that travelers are most interested in.
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There are most likely no direct flights on the Philadelphia — Seattle route
We couldn't find any special offers for flights from Philadelphia to Seattle
Philadelphia — Seattle
08/22/2026
Departure
Direct flight
AA1823
starting at $273
starting at $273
starting at $129
The Philadelphia — Seattle route is served by multiple airlines, including American Airlines and Frontier Airlines. This is convenient for those who want the best balance of price, schedule, and travel conditions. Tickets start from $129, and depending on season and promotions, even better deals may appear. With our service, you can easily compare available options and book tickets that match your plans. The variety of carriers allows flexible choices and comfortable travel without overpaying.
The cheapest flight ticket from Philadelphia to Seattle according to data for the last 48 hours costs $129
Often the best time to buy tickets from Philadelphia to Seattle is 2 months before departure.
Based on statistics over the past years, the lowest prices for flights from Philadelphia to Seattle can be found flying in these months: August.
The fastest flights from Philadelphia to Seattle start from 15 hours 42 minutes in the air.
The following airlines operate direct flights on the route Philadelphia — Seattle: American 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
The cheapest one-way flight from Philadelphia to Seattle departs on 08/23/2026, is operated by Frontier Airlines and costs $129
The cheapest roundtrip flight from Philadelphia to Seattle departs on 09/23/2026, is operated by Frontier Airlines and costs $277
Fastest flight from Philadelphia to Seattle takes 15h 42m
There are direct flights on this route 1 day a week: Sa
The distance between Philadelphia and Seattle is 3819km (2368 miles). There are 47 direct flights from Philadelphia to Seattle. The time difference between Philadelphia and Seattle is 3h. Flights from Philadelphia begin at 7:33 AM. The latest flight from Philadelphia departs at 7:35 PM