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Uncover the best deals on St Louis to Washington flights by comparing fares from hundreds of airlines and agencies.
Good to Know: Cheapest and Fastest STL - IAD Flights
Useful information for finding best airline tickets from Lambert St Louis International to Washington Dulles International on your next trip.
Cheapest Round Trip Flight
$582
Delta Airlines
• 1 stop
• 7h 23m
Jun 28 – Jul 05
The cheapest round trip flight from St Louis to Washington (STL-IAD-STL) is currently $582
Fastest Flight
6h 44m
The fastest nonstop flight from St Louis to Washington (STL-IAD) takes 6h 44m
Top Airlines Flying from St Louis to Washington
Latest Flight Deals from St Louis (STL) to Washington (IAD)
Compare and book low fare round-trip air tickets from St Louis to Washington. Ideal for travelers with confirmed return itineraries.
Jun 28 - Jul 05, Economy
St Louis → Washington
7h 23m
6:00 AM - 11:43 AM • 1 stop
St Louis → Washington
7h 18m
6:40 PM - 10:18 PM • 1 stop
Delta Airlines
Jun 28 - Jul 05, Economy
St Louis → Washington
8h 42m
10:20 AM - 4:42 PM • 1 stop
St Louis → Washington
6h 50m
5:29 PM - 8:39 PM • 1 stop
Delta Airlines
Jun 28 - Jul 05, Economy
St Louis → Washington
7h 36m
1:39 PM - 7:35 PM • 1 stop
St Louis → Washington
7h 17m
6:00 AM - 9:37 AM • 1 stop
Delta Airlines
Jun 28 - Jul 05, Economy
St Louis → Washington
7h 12m
7:12 PM - 12:44 AM • 1 stop
St Louis → Washington
7h 12m
6:00 AM - 9:32 AM • 1 stop
Delta Airlines
Flying to Washington soon? We've surfaced some of the most affordable last-minute flights from St Louis to Washington, ideal for urgent plans or spontaneous trips.
Jun 28 - Jul 05, Economy
St Louis → Washington
7h 23m
6:00 AM - 11:43 AM • 1 stop
St Louis → Washington
7h 18m
6:40 PM - 10:18 PM • 1 stop
Delta Airlines
Jun 28 - Jul 05, Economy
St Louis → Washington
8h 42m
10:20 AM - 4:42 PM • 1 stop
St Louis → Washington
6h 50m
5:29 PM - 8:39 PM • 1 stop
Delta Airlines
Jun 28 - Jul 05, Economy
St Louis → Washington
7h 36m
1:39 PM - 7:35 PM • 1 stop
St Louis → Washington
7h 17m
6:00 AM - 9:37 AM • 1 stop
Delta Airlines
Jun 28 - Jul 05, Economy
St Louis → Washington
7h 12m
7:12 PM - 12:44 AM • 1 stop
St Louis → Washington
7h 12m
6:00 AM - 9:32 AM • 1 stop
Delta Airlines
FAQs on St Louis to Washington Flights
What are the airports in St Louis?
STL
What’s the most popular airline flying from STL to IAD?
The most popular airline flying from St Louis to Washington are
Can I fly from STL to IAD non-stop?
NO
Which airlines fly nonstop between St Louis and Washington?
The non-stop flights between St Louis and Washington are .
What’s the earliest departure time from STL to IAD Airport?
The earliest flight leaves STL at 6:00 am and lands in IAD - Washington Dulles International
What are the airports in Washington?
IAD,BWI,DCA
Can I make changes to my St Louis to Washington flight tickets or cancel them on FareLeaders.com?
No. We are an airfare comparison site. All the tickets are booked by the travel agent offering the flight deal and any changes or cancellations to be made are directly done directly by them or the airlines.
Can I cancel my flight tickets from STL to IAD?
Read the fare rules of the St Louis to Washington air tickets booked. Some airlines allow you to cancel the tickets within a stipulated time period with a cancellation fee.
Which airline alliances offer flights from St Louis and Washington?
operate flights between St Louis and Washington
How long does a flight from St Louis to Washington take?
It takes approximately 2 hour to fly non-stop from STL to IAD, which is 696.18 miles by air.
Which airlines provide the cheapest flights from St Louis (STL) to Washington (IAD) ?
In the past couple of days, the cheapest tickets to IAD from STL were found on DL : USD 582
Do I need a passport to fly between STL and IAD?
No
What’s the latest departure time from STL to IAD ?
The last flight leaves STL at 7:12 pm
St Louis (STL) to Washington (IAD): Airport Information
| Origin Airport | Lambert St Louis International , St Louis, US |
| Destination Airport | Washington Dulles International , Washington, US |
| Distance | 696 miles |
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