$113 Cheap Flights from St. Louis to Washington

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Find The Best Dates To Fly from Lambert-St. Louis Intl. to Washington Dulles Intl.

Amazing STL to IAD Flight Deals

The cheapest flights to Washington Dulles Intl. found within the past 7 days were $226 round trip and $113 one way. Prices and availability subject to change. Additional terms may apply.

Wed, Nov 15 - Fri, Nov 24
STL
St. Louis
IAD
Washington
$226 Roundtrip, found 4 days ago
$226
Roundtrip
found 4 days ago
Select United flight, departing Wed, Nov 15 from St. Louis to Washington, returning Fri, Nov 24, priced at $226 found 4 days ago
Wed, Nov 15 - Fri, Nov 24
STL
St. Louis
IAD
Washington
$236 Roundtrip, found 4 days ago
$236
Roundtrip
found 4 days ago
Select United flight, departing Wed, Nov 15 from St. Louis to Washington, returning Fri, Nov 24, priced at $236 found 4 days ago
Wed, Nov 15 - Fri, Nov 24
STL
St. Louis
IAD
Washington
$238 Roundtrip, found 4 days ago
$238
Roundtrip
found 4 days ago
Select American Airlines flight, departing Wed, Nov 15 from St. Louis to Washington, returning Fri, Nov 24, priced at $238 found 4 days ago
Wed, Nov 15 - Fri, Nov 24
STL
St. Louis
IAD
Washington
$239 Roundtrip, found 4 days ago
$239
Roundtrip
found 4 days ago
Select Delta flight, departing Wed, Nov 15 from St. Louis to Washington, returning Fri, Nov 24, priced at $239 found 4 days ago
Wed, Nov 15 - Fri, Nov 24
STL
St. Louis
IAD
Washington
$242 Roundtrip, found 4 days ago
$242
Roundtrip
found 4 days ago
Select American Airlines flight, departing Wed, Nov 15 from St. Louis to Washington, returning Fri, Nov 24, priced at $242 found 4 days ago
Tue, Oct 17 - Tue, Oct 24
STL
St. Louis
IAD
Washington
$242 Roundtrip, found 13 hours ago
$242
Roundtrip
found 13 hours ago
Select United flight, departing Tue, Oct 17 from St. Louis to Washington, returning Tue, Oct 24, priced at $242 found 13 hours ago
Tue, Nov 7 - Wed, Nov 8
STL
St. Louis
IAD
Washington
$245 Roundtrip, found 6 days ago
$245
Roundtrip
found 6 days ago
Select Delta flight, departing Tue, Nov 7 from St. Louis to Washington, returning Wed, Nov 8, priced at $245 found 6 days ago
Tue, Oct 17 - Tue, Oct 24
STL
St. Louis
IAD
Washington
$252 Roundtrip, found 13 hours ago
$252
Roundtrip
found 13 hours ago
Select United flight, departing Tue, Oct 17 from St. Louis to Washington, returning Tue, Oct 24, priced at $252 found 13 hours ago
Tue, Nov 7 - Sat, Nov 11
STL
St. Louis
IAD
Washington
$253 Roundtrip, found 6 days ago
$253
Roundtrip
found 6 days ago
Select Delta flight, departing Tue, Nov 7 from St. Louis to Washington, returning Sat, Nov 11, priced at $253 found 6 days ago
Wed, Oct 18 - Wed, Oct 25
STL
St. Louis
IAD
Washington
$254 Roundtrip, found 13 hours ago
$254
Roundtrip
found 13 hours ago
Select American Airlines flight, departing Wed, Oct 18 from St. Louis to Washington, returning Wed, Oct 25, priced at $254 found 13 hours ago

Flight Schedule for STL to IAD

CarrierFlightDepart STLArrive IADSat
9/23		Sun
9/24		Mon
9/25		Tue
9/26		Wed
9/27		Thu
9/28		Fri
9/29		Stops
UA450608:25 am11:31 amCheck FareCheck FareCheck FareCheck FareCheck FareCheck FareCheck Fare
0 Stops
UA441001:12 pm04:18 pmCheck FareCheck FareCheck FareCheck FareCheck FareCheck Fare
-
0 Stops
UA438601:13 pm04:15 pm
-
-
-
-
-
-
Check Fare
0 Stops

Best Washington Dulles Intl. Flight and Hotel Packages

Washington Dulles Intl. flight + hotel packages - economy flights

Cambria Hotel Washington D.C. Capitol Riverfront

Cambria Hotel Washington D.C. Capitol Riverfront

3 out of 5
Price was $759, price is now $582 per person
per person
Nov 16 - Nov 20
Roundtrip flight included
St. Louis (STL) to Washington (DCA)
Sheraton Suites Old Town Alexandria

Sheraton Suites Old Town Alexandria

4 out of 5
Price was $646, price is now $549 per person
per person
Nov 16 - Nov 20
Roundtrip flight included
St. Louis (STL) to Washington (DCA)
Salamander Washington DC

Salamander Washington DC

5 out of 5
Price was $1,166, price is now $1,089 per person
per person
Nov 16 - Nov 20
Roundtrip flight included
St. Louis (STL) to Washington (DCA)
Riggs Washington DC

Riggs Washington DC

5 out of 5
Price was $880, price is now $730 per person
per person
Oct 27 - Oct 29
Roundtrip flight included
St. Louis (STL) to Washington (DCA)
Sofitel Washington DC Lafayette Square

Sofitel Washington DC Lafayette Square

5 out of 5
Price was $785, price is now $693 per person
per person
Oct 27 - Oct 29
Roundtrip flight included
St. Louis (STL) to Washington (DCA)
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See all available trips from Lambert-St. Louis Intl. to Washington Dulles Intl.
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Prices and availability subject to change. Additional terms may apply.

Frequently asked questions

Can I catch a flight from Lambert Field to Dulles Intl. Airport right now?
It’s prudent to know about any travel advice reports and quarantine requirements in place in your destination city. Be sure to check out our Covid-19 Travel Advisor for up-to-date information on flying to Washington Dulles Intl. Airport (IAD) from STL.
Are there direct flights from Lambert Field to Washington Dulles Intl. Airport (IAD)?
The only thing standing between you and your next amazing adventure is a single flight. United Airlines is the only airline that operates nonstop services between Lambert-St. Louis Intl. Airport (STL) and IAD, so it’s wise to book ahead.
If I am not able to travel due to COVID-19, can I change my booking to a later date?
For more info about changing your flight to Washington Dulles Intl. Airport (IAD), please visit our Customer Service Portal.
How long is the flight from St. Louis Lambert International Airport to Dulles Intl. Airport?
If you were hoping to squeeze in a decent snooze during your St. Louis to Sterling flight, you may have to make other plans. The usual flight time between Lambert-St. Louis Intl. Airport (STL) and Dulles Intl. Airport is a short 1 hour and 59 minutes — just enough to relax your body and close your eyes for a little while.
What is the flight distance from Lambert Field to IAD?
With a flight distance of only 700 mi, a magazine or a podcast is all you’ll need to keep yourself amused on the journey between St. Louis Lambert International Airport and IAD. You’ll be filing off the aircraft and diving into exciting adventures in no time.
What airlines fly from STL to Dulles Intl. Airport?
If you’re on the lookout for an airline that flies direct from St. Louis to Sterling and rates highly with travelers, try United Airlines. They offer up to 95 flights each month.
What airlines have practices regarding COVID-19 in place and use social distancing?
From the moment you enter the departure terminal to when you leave the arrivals terminal, if you’re flying with United Airlines, Delta or American Airlines you can be sure that COVID-19 measures and social distancing rules have been adhered to. Many airlines have introduced capped capacity flights and keeping the middle seat empty.
What is the best day to buy a plane ticket?
This just in! Airfares offered on Thursdays tend to be the cheapest, according to flight demand on Travelocity in 2021. Tuesday and Wednesday prices are also good, but you may want to prepare your budget if booking during the weekend, as data shows that is when prices are generally at their highest.
What are the cheapest days to fly?
Frequent travelers may already know this, but earlier in the week can be the cheapest time to fly. In 2021, flights departing on a Monday were generally the cheapest of the week, whereas you may pay a premium for weekend flights when demand is usually high. On average, tickets were most expensive for Saturday departures, so if you need to fly out on a weekend, you might look for deals ahead of time.
How far in advance can you book a flight?
Trying to figure out how early you should book your flight? It’s possible to start comparing international airfares on Travelocity up to 12 months in advance. However, it does depend on the carrier as not all airlines release their prices that far out. According to our 2021 flight demand trends, last minute planners can still bag a bargain with some of the cheapest fares appearing 0-2 weeks prior to their travel dates.*According to flight demand on Travelocity.com from January to December 2021. Savings are subject to change based on departure location, date and destination.

 

Traveling From
Lambert-St. Louis Intl.
Traveling To
Washington Dulles Intl.
Shortest Flight Time
2 hours 2 mins
Earliest Departure Time
8:23AM CDT
Latest Departure Time
1:13PM CDT
Lowest Flight Price
$226

Route Info

Flight path for flights from Lambert-St. Louis International Airport to Washington Dulles International Airport.


Origin:
STL - Lambert-St. Louis International Airport
Destination:
IAD - Washington Dulles International Airport
Distance:
698.00 miles

Airline carriers and aircraft used on flights from STL to IAD


Airline Carrier
Aircraft
United Airlines
Fokker 100

Discover our best flights from St. Louis STL to Washington 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. 

 

Find our best return flights from St. Louis STL to Washington IAD at the right price  

Airfares to Washington IAD from St. Louis STL currently cost between $226 and $254. 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. 

 

Book one-way flights from St. Louis STL to Washington IAD 

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 $113. Prices and availability subject to change. Additional terms may apply. 

 

Get to Washington IAD from St. Louis STL quicker with direct flights. 

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) 2 min(s).  

 

Find our cheapest airfares for flights from St. Louis STL to Washington IAD

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.  

 

Get our best airfare deals for your flight from St. Louis STL to Washington IAD today 

If you’re flexible about when you travel, November 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. 

 

Book flexible airline tickets for flights to Washington IAD from St. Louis STL 

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.  

 

Travel with confidence when you book flights to Washington IAD from St. Louis STL with Travelocity 

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. 

*Price based on the lowest price found within past 24 hours and based upon one night stay for two adults over the next thirty days. Prices and availability subject to change. Additional terms may apply.