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IAD (Washington) to STL (St. Louis) Flights $202.4

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Cheap IAD to STL Flights

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

Interesting Facts About Flights from Washington to St. Louis (IAD to STL)

Question : When traveling to Saint Louis from Dulles, how long will you be in the air?
Answer : When flying from IAD to STL, it will take two hours and 28 minutes on average.

Question : Do some days of the week have more flight times than others?
Answer : When you’re flying from IAD to STL, the day with the most flight times is Sunday, with three different options. The day with the fewest number of options is Saturday with only two different times.

Question : Which airline has been the most dependable in getting passengers to their destination on time?
Answer : UPS leads the way with a 100% on-time rate. Spend as little time in an airport as necessary by flying with UPS. Perfection is hard to come by, so hopefully it continues.

Question : If you’re booking IAD to STL, how many different choices of departure times do you have?
Answer : Depending on the day, the number of flight times will change, but on average there are three. You won't have as many options on this route as most others departing the United States.

Question : Which airline is struggling to get to Saint Louis on time?
Answer : 100% of PSA Airlines flights from Washington Dulles International Airport (IAD) to Lambert-St. Louis International Airport (STL) are late. If you should choose this airline, be sure to track the flight status to stay on top of the departure time.

Question : Looking for the shortest flight from IAD to STL?
Answer : United Airlines can get you there in two hours and 20 minutes. So, if you were to leave Dulles at 8:35 AM EDT, you would arrive in Saint Louis at 9:55 AM CDT (remember, there is a one-hour time change).

Question : Over the coming months, which airline is getting their passengers to Lambert-St. Louis International Airport (STL) round-trip the cheapest?
Answer : Flight prices are hitting highs of $847 over the next three months when flying to STL from IAD. Check out United Airlines, as they have been booking customers at just $202.