- Fastest outbound flight
- Fastest inbound flight
- non-stop flights
- 16x / week
- Flight distance
- 2,748 km
- Time difference
- Most popular airlines
- Alaska Airlines
- Alaska Airlines
Flight schedule from St. Louis (STL) to Seattle-Tacoma (SEA)
Select a travel date in the flight schedule for the route from St. Louis (STL) to Seattle-Tacoma (SEA) and compare affordable flight deals.
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Matching outbound flightsSTL–SEA · 8 of 8
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- September 13 – 19, 2026
- September 20 – 26, 2026
- Sep 27 – Oct 3, 2026
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Tips and tricks to help you find cheap flights from St. Louis to Seattle Tacoma
Favorite airline: Alaska Airlines
Alaska Airlines is the most popular airline for flights from St. Louis to Seattle-Tacoma.
Alaska Airlines
33 %
Delta
22 %
Spirit Airlines
14 %
Important flight information
Frequently Asked Questions (FAQ)
How long is the flight from St. Louis to Seattle-Tacoma?
A nonstop flight from St. Louis to Seattle-Tacoma typically takes around 4 hours 28 minutes. This makes the nonstop service the fastest and most convenient way to travel between St. Louis and Seattle-Tacoma. It is worth checking flight times when searching, as they can vary by airline and travel date.
Are there nonstop flights from St. Louis to Seattle-Tacoma?
Yes, there are nonstop flights from St. Louis to Seattle-Tacoma, averaging around 2 to 3 flights per day, operated by, among others, Alaska Airlines. If you want to fly without a layover, it is worth filtering specifically for nonstop flights when searching.
Which airlines fly from St. Louis to Seattle-Tacoma?
Direct flights from St. Louis to Seattle-Tacoma are operated by, among others, Alaska Airlines. These flights take you to Seattle-Tacoma nonstop, making them especially practical for short trips or weekend getaways. It is still worth comparing departure times and airline policies, as baggage rules and fees can vary.
On which days are there nonstop flights from St. Louis to Seattle-Tacoma?
Nonstop flights from St. Louis to Seattle-Tacoma operate daily. The schedule may vary by season, so it is worth comparing several travel dates. If your preferred day does not have a nonstop flight, nearby departure days or short connecting flights may be a good alternative.
How many flights are there per day from St. Louis to Seattle-Tacoma?
On the route from St. Louis to Seattle-Tacoma, there are on average around 2 to 3 flights per day. The number of flights can vary by day of the week and season. If you are flexible with your dates, it is worth comparing several departure days.
How many flights per week are there from St. Louis to Seattle-Tacoma?
On the route from St. Louis to Seattle-Tacoma, there are around 16 to 17 flights per week. The number of flights can vary depending on the season and day of the week. If you have flexibility, it is worth looking at several departure days.
When does the first flight from St. Louis to Seattle-Tacoma depart?
The earliest nonstop flight from St. Louis to Seattle-Tacoma usually departs at 6:00 AM. The exact departure time may vary by day of the week and airline. Early flights are especially useful if you want to make the most of your arrival day in Seattle-Tacoma.
When does the last flight from St. Louis to Seattle-Tacoma depart?
The last nonstop flight from St. Louis to Seattle-Tacoma usually departs at 7:36 PM. Late flights can be convenient if you want to travel after work or in the evening. Do check whether it is a nonstop flight, as a connecting itinerary could push the arrival time significantly later.