Cheap Flights From Ronald Reagan Washington National (DCA) To Lambert-St. Louis Intl. (STL)

Wander Wisely with exceptional service, 24/7 supportOpens in a new window

Feel at ease with free flight cancellations within 24 hours of booking

Change your flight without a fee on select flights

Find The Best Dates To Fly

Cheapest Flights from Washington (DCA) to St. Louis (STL)

The cheapest flights to Lambert-St. Louis Intl. found within the past 7 days were CA $445 round trip and CA $505 one way. Prices and availability subject to change. Additional terms may apply.

Tue, Dec 23 - Thu, Dec 25
DCA
Washington
STL
St. Louis
CA $445 Roundtrip, found 4 days ago
CA $445
Roundtrip
found 4 days ago
Select American Airlines flight, departing Tue, Dec 23 from Washington to St. Louis, returning Thu, Dec 25, priced at CA $445 found 4 days ago
Tue, Dec 23 - Thu, Dec 25
DCA
Washington
STL
St. Louis
CA $459 Roundtrip, found 4 days ago
CA $459
Roundtrip
found 4 days ago
Select American Airlines flight, departing Tue, Dec 23 from Washington to St. Louis, returning Thu, Dec 25, priced at CA $459 found 4 days ago
Tue, Dec 23 - Thu, Dec 25
DCA
Washington
STL
St. Louis
CA $528 Roundtrip, found 4 days ago
CA $528
Roundtrip
found 4 days ago
Select American Airlines flight, departing Tue, Dec 23 from Washington to St. Louis, returning Thu, Dec 25, priced at CA $528 found 4 days ago
Tue, Dec 23 - Thu, Dec 25
DCA
Washington
STL
St. Louis
CA $542 Roundtrip, found 4 days ago
CA $542
Roundtrip
found 4 days ago
Select American Airlines flight, departing Tue, Dec 23 from Washington to St. Louis, returning Thu, Dec 25, priced at CA $542 found 4 days ago
Tue, Dec 23 - Thu, Dec 25
DCA
Washington
STL
St. Louis
CA $546 Roundtrip, found 4 days ago
CA $546
Roundtrip
found 4 days ago
Select American Airlines flight, departing Tue, Dec 23 from Washington to St. Louis, returning Thu, Dec 25, priced at CA $546 found 4 days ago
Tue, Dec 23 - Thu, Dec 25
DCA
Washington
STL
St. Louis
CA $560 Roundtrip, found 4 days ago
CA $560
Roundtrip
found 4 days ago
Select American Airlines flight, departing Tue, Dec 23 from Washington to St. Louis, returning Thu, Dec 25, priced at CA $560 found 4 days ago
Tue, Dec 23 - Thu, Dec 25
DCA
Washington
STL
St. Louis
CA $628 Roundtrip, found 4 days ago
CA $628
Roundtrip
found 4 days ago
Select American Airlines flight, departing Tue, Dec 23 from Washington to St. Louis, returning Thu, Dec 25, priced at CA $628 found 4 days ago
Tue, Dec 23 - Thu, Dec 25
DCA
Washington
STL
St. Louis
CA $642 Roundtrip, found 4 days ago
CA $642
Roundtrip
found 4 days ago
Select American Airlines flight, departing Tue, Dec 23 from Washington to St. Louis, returning Thu, Dec 25, priced at CA $642 found 4 days ago
Tue, Dec 23 - Thu, Dec 25
DCA
Washington
STL
St. Louis
CA $682 Roundtrip, found 4 days ago
CA $682
Roundtrip
found 4 days ago
Select American Airlines flight, departing Tue, Dec 23 from Washington to St. Louis, returning Thu, Dec 25, priced at CA $682 found 4 days ago
Tue, Dec 23 - Thu, Dec 25
DCA
Washington
STL
St. Louis
CA $696 Roundtrip, found 4 days ago
CA $696
Roundtrip
found 4 days ago
Select American Airlines flight, departing Tue, Dec 23 from Washington to St. Louis, returning Thu, Dec 25, priced at CA $696 found 4 days ago
Tue, Dec 23 - Thu, Dec 25
DCA
Washington
STL
St. Louis
CA $708 Roundtrip, found 4 days ago
CA $708
Roundtrip
found 4 days ago
Select American Airlines flight, departing Tue, Dec 23 from Washington to St. Louis, returning Thu, Dec 25, priced at CA $708 found 4 days ago
Tue, Dec 23 - Thu, Dec 25
DCA
Washington
STL
St. Louis
CA $709 Roundtrip, found 4 days ago
CA $709
Roundtrip
found 4 days ago
Select American Airlines flight, departing Tue, Dec 23 from Washington to St. Louis, returning Thu, Dec 25, priced at CA $709 found 4 days ago
Tue, Dec 23 - Thu, Dec 25
DCA
Washington
STL
St. Louis
CA $721 Roundtrip, found 4 days ago
CA $721
Roundtrip
found 4 days ago
Select American Airlines flight, departing Tue, Dec 23 from Washington to St. Louis, returning Thu, Dec 25, priced at CA $721 found 4 days ago
Tue, Dec 23 - Thu, Dec 25
DCA
Washington
STL
St. Louis
CA $789 Roundtrip, found 4 days ago
CA $789
Roundtrip
found 4 days ago
Select American Airlines flight, departing Tue, Dec 23 from Washington to St. Louis, returning Thu, Dec 25, priced at CA $789 found 4 days ago

Frequently asked questions

Are there direct flights from Ronald Reagan Washington National Airport (DCA) to Lambert Field?
Your next unforgettable adventure is on the other side of just one flight. You can travel direct from DCA to Lambert Field with multiple airlines, including American Airlines and Southwest Airlines.
What airlines fly from Ronald Reagan Washington National Airport (DCA) to Lambert-St. Louis Intl. Airport (STL)?
If you're flying to St. Louis from Arlington, you'll find several airlines that fly direct. One of the most popular is American Airlines (AA), which has 86 flights on this route every month. A popular alternative is Southwest Airlines (WN), which has 60 flights every month. The more airlines you weigh up, the more likely you are to pick up a wonderful deal.
What is the best day to buy a plane ticket?
Airfares offered on Friday tend to be the cheapest, according to flight demand on Travelocity.ca in 2021. Purchasing your airfares on a Thursday or Saturday can also provide better value, however our advice if you're looking to save money is to avoid booking on a Wednesday or Sunday. Our data shows that those two days have the highest ticket values on average, so keep this in mind if you're browsing flight deals.
What are the cheapest days to fly?
Frequent travellers may already know this, but earlier in the week is often the cheapest time to fly. Flights departing on a Monday are the cheapest of the week. Since flights towards the middle of the week tend to be more popular, this causes the prices to rise. This is why, on average, airfares booked on Travelocity.ca in 2021 were most expensive for Wednesday departures.
How far in advance can you book a flight?
Here's the deal: It is typically possible to start comparing international airfares on Travelocity.ca 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 2-4 weeks prior to their travel dates.*According to flight demand on Travelocity.ca from January to December 2021. Savings are subject to change and may vary depending on selections made.

Popular Flight Routes from Washington (DCA)

Travelers at DCA love to visit these top cities. Roam to the top destinations from Washington (DCA) today with the cheap prices from Travelocity!

Popular Flight Routes from St. Louis (STL)

Travelers at STL love to visit these top cities. Roam to the top destinations from St. Louis(STL) today with the cheap prices from Travelocity!

*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.