Cheap Flights from Washington (IAD) to St. Louis (STL)

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Popular airlines from Washington Dulles Intl. Airport (IAD) to St. Louis Lambert Intl. Airport (STL)

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Frequently asked questions

How long does it take to fly from IAD to Lambert-St. Louis Intl. Airport (STL)?
A direct flight with United Airlines takes approximately 2 hours and 27 minutes. Step on board the 8:32AM flight from Dulles Intl. Airport and touch down at Lambert Field at 9:59AM. Pick up a superb deal on this route when you use Expedia to book your journey.
Is it cheaper to buy a plane ticket from Dulles Intl. Airport to Lambert Field last minute?
Being the spontaneous type is an awesome way to travel the globe, but it isn't always the best way to nab a bargain plane ticket. Consider booking your IAD to STL trip in advance rather than leaving it until the last minute. Based on flight pricing and demand studies in 2022, we have found that the best time to book domestic flights is between 28 – 35 days ahead of the departure date, and international flights three to four months in advance. Leave your spontaneity for when you reach STL!
What airline has the least delays from Dulles Intl. Airport to Lambert Field?
Journey with United Airlines from Dulles Intl. Airport to STL and you're more likely to touch down at the time listed on your boarding pass. This airline takes first place on this route, with an 86% on-time score. If your flight is delayed for whatever reason, the Expedia App will help you stay in the loop. It'll give you trip alerts right when you need them, from flight delays to gate changes.
What airports do you fly into for St. Louis from Washington?
With Lambert-St. Louis Intl. Airport (STL), Spirit of St. Louis Airport (SUS) and St. Louis Downtown Airport (CPS) to pick from, flying from Washington to St. Louis is no sweat. The city's major gateway, Lambert-St. Louis Intl. Airport (STL), is approximately 19 kilometers northwest of the center. Along with ticket prices, consider factors like bus or train options from the airport and the distance to your hotel when choosing where to fly into. Get your St. Louis adventure off to a terrific start by visiting Busch Stadium and Gateway Arch.
What are the most popular departure times for flights from IAD to Lambert Field?
The most popular departure times for flights from IAD to STL fall between 8:00 AM - 9:00 AM on United Airlines. Our tip is to jet off in the morning. The earlier you travel, the better your chances of arriving on time with lighter air traffic around.
Can I change the date of my flight from Washington Dulles Intl. Airport (IAD) to STL?
You can easily make changes to your Dulles Intl. Airport to Lambert-St. Louis Intl. Airport (STL) trip by logging in to the Expedia Trips portal. But before doing so, check out the rules in your itinerary to learn what you're allowed to do and what charges may apply. Some carriers charge a change fee per person, on top of any difference in ticket prices. But if you booked in the last 24 hours, you may be able to cancel for free and book new flights. You can also browse our Customer Service portal for further details and to connect with our Virtual Agent.

Travel information

Origin airport
Washington Dulles Intl.
Destination airport
Lambert-St. Louis Intl.
Distance
1111 km
Average flight time
1 hour 26 mins

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