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SEA (Seattle) to STL (St. Louis) Flights $294.64

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Cheap SEA to STL Flights

Prices found within past 7 days. Prices and availability subject to change. Additional terms may apply.

Interesting Facts About Flights from Seattle to St. Louis (SEA to STL)

Question : How many days should you spend in Saint Louis?
Answer : Travelers from SEA to STL stay six days on average.

Question : Do prices fluctuate more for this route than others?
Answer : Ranging from $218 to $1,119, prices for SEA to STL do change more than the majority of routes in the United States. However, the sooner you book, the more you'll be able to save.

Question : How many departure times from Seattle-Tacoma International Airport (SEA) to Lambert-St. Louis International Airport (STL) are there on a daily basis?
Answer : Each day is different, but on average, you can expect to see three available departure times. The average route departing the United States currently has five different flight times per day, so expect fewer options than you're used to.

Question : From Seattle to Saint Louis, which day is going to have the most flight times?
Answer : Sunday has the greatest variety of flight times for Seattle to Saint Louis with three. However, with only two flight times, Tuesday doesn't offer quite as many options when finding that perfect departure time.

Question : Which airline is least likely to get you to STL on time?
Answer : 13% of Horizon Air flights from Seattle-Tacoma International Airport (SEA) to Lambert-St. Louis International Airport (STL) are delayed. If you’re on Horizon Air, be sure to sign up for the delay notifications to stay up to date with your flight’s status.

Question : Which airline has been the most dependable in getting passengers to their destination on time?
Answer : Southwest Airlines will have you to STL on time 91% of the time. Don't spend more time waiting in an airport than you have to and stick with Southwest Airlines on this route. Note that if they do have a delay, it usually lasts less than 15 minutes.

Question : What are the chances this flight will be delayed?
Answer : This particular route gets passengers to Lambert-St. Louis International Airport on time 89% of the time, which puts it in the top 25% of the world. If a flight is late, though, expect an average of less than 15 minutes added to your flight time.