Compare airlines, prices, and flight durations for your trip
A non-stop flight is the most convenient and comfortable way to fly from Saint Louis 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 Saint Louis 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.
The route Saint Louis — Seattle is served by several airlines: Alaska Airlines, Frontier Airlines, and American Airlines. This gives passengers more freedom in choosing flights. You can consider not only the price but also schedules, baggage policies, and onboard service. Our service compares all offers so you can find tickets from $83 and choose the most convenient option. Thanks to airline competition, you may also find promotional fares or special offers, helping you save even more. Plan your trip in advance and choose the best flights without overpaying.
Saint Louis — Seattle
01/16/2026
Departure
Direct flight
AS618
starting at $234
Saint Louis — Seattle
12/31/2025
Departure
Direct flight
AS7126
starting at $142
Unable to find information about the schedule of direct flights from
The cheapest one-way flight from Saint Louis to Seattle departs on 01/17/2026, is operated by Frontier Airlines and costs $83
The cheapest roundtrip flight from Saint Louis to Seattle departs on 07/28/2026, is operated by Alaska Airlines and costs $325
Fastest flight from Saint Louis to Seattle takes 9h 37m
There are no direct flights on this route.
The distance between Saint Louis and Seattle is 2768km (1716 miles). There are 40 direct flights from Saint Louis to Seattle. The time difference between Saint Louis and Seattle is 2h. Flights from Saint Louis begin at 7:00 AM. The latest flight from Saint Louis departs at 5:26 PM
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 Saint Louis to Seattle. We have connected more than 40 airlines and airline ticketing agencies to help you find the most suitable and affordable flight option.
We couldn't find any special offers for flights from Saint Louis to Seattle
The cheapest flight ticket from Saint Louis to Seattle according to data for the last 48 hours costs $83
Often the best time to buy tickets from Saint Louis to Seattle is 2 months before departure.
The fastest flights from Saint Louis to Seattle start from 9 hours 37 minutes in the air.
The following airlines operate direct flights on the route Saint Louis — Seattle: 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 Saint Louis to Seattle
