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The cheapest flights to Washington Dulles Intl. found within the past 7 days were $198 round trip and $99 one way. Prices and availability subject to change. Additional terms may apply.
|Traveling From||Lambert-St. Louis Intl.|
|Traveling To||Washington Dulles Intl.|
|Shortest Flight Time||2 hours 8 mins|
|Earliest Departure Time||8:30AM CDT|
|Latest Departure Time||8:30AM CDT|
|Lowest Flight Price||$198|
Flight path for flights from Lambert-St. Louis International Airport to Washington Dulles International Airport.
Airline carriers and aircraft used on flights from STL to IAD
With 20 airlines to choose from on Travelocity, you can easily find the best option for you. Use our filters to sort by price, compare airlines, and find the most convenient flight times.
Airfares to Washington IAD from St. Louis STL currently cost between $198 and $308. It’s usually cheaper to book a round trip than two separate one-way flights. Prices and availability subject to change. Additional terms may apply.
If you want to be flexible about when you return, or keep your travel options open ended, a one-way flight could be just the ticket! You’ll find one-way airfares from St. Louis STL to Washington IAD on Travelocity starting at $99. Prices and availability subject to change. Additional terms may apply.
Get to Washington faster, without the hassle of changing planes and moving baggage, by booking a direct flight. Expect your direct flight to IAD from STL to take around 2 hour(s) 8 min(s).
Find cheap flight deals by using our search filters to sort results starting with the lowest price airfares to IAD from STL. Our Price Match Promise means if you find a lower rate on Travelocity.com or on another US-based website within 24 hours of booking, we’ll credit or refund the difference.
If you’re flexible about when you travel, October is usually the cheapest month to fly from St. Louis STL to Washington IAD. If you need to be more specific, search by date and arrival and departure times.Then, compare prices across different airlines, and sort results by lowest price first.
Some airlines let you change your travel dates without charging a fee. Use our ‘no change fee’ filter to see which flights to IAD from STL have this option.
We’ve secured fantastic deals with all the main airline carriers and it’s easy to compare, choose, and book with Travelocity. With 24/7 customer service and our free 'App', we’ll always keep you moving.
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