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

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Cheap STL to IAD Flights

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

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

Question : If punctuality is required for you to book a flight, which airline is your best bet?
Answer : United Airlines will have you to IAD on schedule 100% of the time. Spend as little time in an airport as necessary by flying with United Airlines. Hopefully they keep that perfect record alive.

Question : From Saint Louis to Dulles, which day of the week is going to have the most flight times?
Answer : With three total flight time options, Monday provides the most flexibility from STL to IAD. However, with two flight times, Sunday doesn't offer quite as many options when finding that perfect departure time.

Question : What are the chances this flight will be delayed?
Answer : This particular route gets passengers to Washington Dulles International Airport on time 73% of the time, which puts it in the top 50% of the world. When there is a delay, it averages about half an hour.

Question : Is price more important than specific travel days for you?
Answer : The lowest-cost day to fly in October is Tuesday. Being flexible with your travel days garners even more savings during booking.

Question : In the next four weeks, what day should you book your trip?
Answer : As of Sep 18th, the best day for booking to Dulles (IAD) is Sep 20th. It costs $202, which is 39% below this route's average price.

Question : How does Saint Louis to Dulles stack up against the rest of the world in overall promptness?
Answer : STL to IAD currently scores 3 out of a possible 5 stars in promptness. This score combines both the number of delayed flights and total delay minutes. With 3 stars, you should feel slightly worried about getting to Dulles on time.

Question : Which airline is offering the cheapest flight from STL to IAD?
Answer : Prices are hitting as high as $884 over the next three months when flying to IAD from STL. Check out United Airlines, as they have been booking customers at just $202.