Cheap flights from Seattle to Saint Louis
from 208 US$
Compare hundreds of airlines Seattle–Saint Louis
The cheapest month is usually 2026-08 · 208 US$
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About this route
Compare flights from Seattle to Saint Louis, a about 2,768 km route (around 3h 58m nonstop). We gather live prices from hundreds of airlines and agencies so you can find the cheapest and book on the official site, with no hidden fees. Direct flights are available. Airlines such as Alaska Airlines, Southwest Airlines operate this route.
When to buy and when to fly
Prices by date
Fares found by date — cheapest days in green.
How to get the best price
Airlines on this route
FAQ
What's the cheapest month to fly Seattle to Saint Louis?
It's usually 2026-08, from 208 USD. Use the price calendar to compare other dates.
How long is the flight from Seattle to Saint Louis?
A nonstop flight takes about 3h 58m and covers around 2,768 km. Connecting itineraries take longer.
Are there direct flights from Seattle to Saint Louis?
Yes, this route has nonstop flights. Filter by "nonstop" to see them.
Which airlines fly from Seattle to Saint Louis?
Alaska Airlines, Southwest Airlines operate this route, among others. Compare them all in the results.
When should I book Seattle–Saint Louis flights?
As a rule of thumb, booking 3–8 weeks ahead and avoiding weekends and holidays tends to give the best prices. Use the calendar to spot the cheapest dates.
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Seattle → Saint Louis · Live fares from 100+ sites — free, with no hidden fees.