$85 Cheap flights from Washington Dulles Intl. to Lambert-St. Louis Intl. (IAD to STL)

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

Amazing IAD to STL Flight Deals

The cheapest flights to Lambert-St. Louis Intl. found within the past 7 days were $188 round trip and $85 one way. Prices and availability subject to change. Additional terms may apply.

Tue, Oct 1 - Tue, Oct 8
IAD
Washington
STL
St. Louis
$188 Roundtrip, found 10 hours ago
$188
Roundtrip
found 10 hours ago
Select Delta flight, departing Tue, Oct 1 from Washington to St. Louis, returning Tue, Oct 8, priced at $188 found 10 hours ago
Fri, Oct 4 - Tue, Oct 8
IAD
Washington
STL
St. Louis
$194 Roundtrip, found 10 hours ago
$194
Roundtrip
found 10 hours ago
Select United flight, departing Fri, Oct 4 from Washington to St. Louis, returning Tue, Oct 8, priced at $194 found 10 hours ago
Tue, Aug 6 - Sat, Aug 24
IAD
Washington
STL
St. Louis
$198 Roundtrip, found 1 day ago
$198
Roundtrip
found 1 day ago
Select Delta flight, departing Tue, Aug 6 from Washington to St. Louis, returning Sat, Aug 24, priced at $198 found 1 day ago
Tue, Oct 1 - Sat, Oct 5
IAD
Washington
STL
St. Louis
$203 Roundtrip, found 10 hours ago
$203
Roundtrip
found 10 hours ago
Select Delta flight, departing Tue, Oct 1 from Washington to St. Louis, returning Sat, Oct 5, priced at $203 found 10 hours ago
Fri, Oct 4 - Tue, Oct 8
IAD
Washington
STL
St. Louis
$206 Roundtrip, found 10 hours ago
$206
Roundtrip
found 10 hours ago
Select United flight, departing Fri, Oct 4 from Washington to St. Louis, returning Tue, Oct 8, priced at $206 found 10 hours ago
Sat, Jun 22 - Tue, Jun 25
IAD
Washington
STL
St. Louis
$208 Roundtrip, found 14 hours ago
$208
Roundtrip
found 14 hours ago
Select Delta flight, departing Sat, Jun 22 from Washington to St. Louis, returning Tue, Jun 25, priced at $208 found 14 hours ago
Mon, Aug 19 - Thu, Aug 22
IAD
Washington
STL
St. Louis
$212 Roundtrip, found 2 days ago
$212
Roundtrip
found 2 days ago
Select United flight, departing Mon, Aug 19 from Washington to St. Louis, returning Thu, Aug 22, priced at $212 found 2 days ago
Sat, Aug 24 - Mon, Sep 9
IAD
Washington
STL
St. Louis
$213 Roundtrip, found 1 day ago
$213
Roundtrip
found 1 day ago
Select Delta flight, departing Sat, Aug 24 from Washington to St. Louis, returning Mon, Sep 9, priced at $213 found 1 day ago
Sat, Oct 5 - Sat, Oct 5
IAD
Washington
STL
St. Louis
$218 Roundtrip, found 10 hours ago
$218
Roundtrip
found 10 hours ago
Select Delta flight, departing Sat, Oct 5 from Washington to St. Louis, returning Sat, Oct 5, priced at $218 found 10 hours ago
Mon, Aug 19 - Thu, Aug 22
IAD
Washington
STL
St. Louis
$222 Roundtrip, found 2 days ago
$222
Roundtrip
found 2 days ago
Select United flight, departing Mon, Aug 19 from Washington to St. Louis, returning Thu, Aug 22, priced at $222 found 2 days ago

Best Lambert-St. Louis Intl. Flight and Hotel Packages

Lambert-St. Louis Intl. flight + hotel packages - economy flights

Price found within the past 48 hours. Click for updated prices.
Hilton St. Louis Airport

Hilton St. Louis Airport

3.5 out of 5
per person
Jun 29 - Jul 3
found 10 hours ago
Roundtrip non-stop flight included
Washington (DCA) to St. Louis (STL)
The Wildwood Hotel

The Wildwood Hotel

3.5 out of 5
Save 100% on your flight
per person
Jun 29 - Jul 3
found 10 hours ago
Roundtrip non-stop flight included
Washington (DCA) to St. Louis (STL)
The Pennywell St.Louis Downtown, a Hilton Hotel

The Pennywell St.Louis Downtown, a Hilton Hotel

4 out of 5
per person
Jun 29 - Jul 3
found 10 hours ago
Roundtrip non-stop flight included
Washington (DCA) to St. Louis (STL)
The Charles F. Knight Center

The Charles F. Knight Center

2.5 out of 5
per person
Jun 29 - Jul 3
found 10 hours ago
Roundtrip non-stop flight included
Washington (DCA) to St. Louis (STL)
River City Casino & Hotel

River City Casino & Hotel

4 out of 5
per person
Jun 29 - Jul 3
found 10 hours ago
Roundtrip non-stop flight included
Washington (DCA) to St. Louis (STL)
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Frequently asked questions

Can I catch a flight from Dulles Intl. Airport to St. Louis Lambert International Airport right now?
Make sure you check out our Covid-19 Travel Advisor to see if there are any current quarantine requirements and travel advice reports in effect in Lambert-St. Louis Intl. Airport (STL) when jet-setting from IAD.
Are there direct flights from IAD to Lambert-St. Louis Intl. Airport (STL)?
For a no-fuss trip between Sterling and St. Louis, take a look at United Airlines. They offer direct flights from Dulles Intl. Airport to STL.
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 Lambert-St. Louis Intl. Airport (STL), please visit our Customer Service Portal.
How long is the flight from Washington Dulles Intl. Airport (IAD) to STL?
Begin your travels feeling rested and relaxed by having a snooze and a snack during your flight to STL. With a general travel time of 5 hours and 8 minutes from Dulles Intl. Airport, you’ll have ample time to enjoy both.
What is the flight distance from Dulles Intl. Airport to STL?
Don’t worry about settling in for a movie. You’ll be lucky to even manage a couple of episodes of your favorite show on the short journey between Dulles Intl. Airport and St. Louis Lambert International Airport. You’ll only be traveling 700 mi.
What airlines fly from IAD to STL?
Ready to book the ticket for your next incredible adventure? Eager to travel from IAD to Lambert Field as fast as possible? Step aboard one of the 91 nonstop flights offered by United Airlines each month, and you’ll be landing before you can ask ‘Are we there yet?’
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 Southwest Airlines, American Airlines or Delta 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
Washington Dulles Intl.
Traveling To
Lambert-St. Louis Intl.
Shortest Flight Time
0 hours 12 mins
Earliest Departure Time
8:20AM CDT
Latest Departure Time
5:55PM CDT
Lowest Flight Price
$188

Route Info

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


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


Airlines & Aircraft Used on IAD to STL Flight Routes


Airline Carrier
Aircraft
American Airlines
Embraer RJ145 Amazon
Jet Airways (India)
Boeing 737-900 pax
United Airlines
Airbus A321-100/200
United Airlines
Boeing 737-500 pax
United Airlines
Boeing 737-600 pax

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

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 Washington IAD to St. Louis STL at the right price  

Airfares to St. Louis STL from Washington IAD currently cost between $188 and $222. 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 Washington IAD to St. Louis STL 

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 Washington IAD to St. Louis STL on Travelocity starting at $85. Prices and availability subject to change. Additional terms may apply. 

 

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

Get to St. Louis faster, without the hassle of changing planes and moving baggage, by booking a direct flight. Expect your direct flight to STL from IAD to take around 0 hour(s) 12 min(s).  

 

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

Find cheap flight deals by using our search filters to sort results starting with the lowest price airfares to STL from IAD. 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 Washington IAD to St. Louis STL today 

If you’re flexible about when you travel, October is usually the cheapest month to fly from Washington IAD to St. Louis STL. 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 St. Louis STL from Washington IAD 

Some airlines let you change your travel dates without charging a fee. Use our ‘no change fee’ filter to see which flights to STL from IAD have this option.  

 

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