- Cheapest roundtrip flight
- from€444
- Fastest outbound flight
- Fastest inbound flight
- 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 · 5 of 5
fromto
dep.arr.
durationstopovers
- October 11 – 17, 2026
- October 18 – 24, 2026
- October 25 – 31, 2026
- STLSEAnonstop
- STLSEAnonstop
- STLSEAnonstop
- STLSEAnonstop
- STLSEAnonstop
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 30 minutes. If you choose a connecting flight, allow more travel time. Typical one-stop itineraries take around 9 hours 53 minutes. For the quickest trip, a nonstop flight is usually the most comfortable choice.
Are there nonstop flights from St. Louis to Seattle-Tacoma?
Yes, there are nonstop flights from St. Louis to Seattle-Tacoma, although not necessarily every day. On average, less than one flight per week are available. If you have flexibility with your travel dates, you will have an easier time finding a suitable nonstop connection.
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 is less than one flight per day on average. The exact number can vary by day of the week and season. If you have flexibility with your travel 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 only a few flights per week. It is therefore especially worthwhile to be flexible with your travel dates so you can more easily find a suitable departure day.
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 4:40 PM. 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 4:40 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.