Cheap Flights From Washington Dulles Intl. (IAD) To Lambert-St. Louis Intl. (STL)

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

The cheapest flights to Lambert-St. Louis Intl. found within the past 7 days were CA $908 round trip and CA $647 one way. Prices and availability subject to change. Additional terms may apply.

Fri, Oct 24 - Sun, Oct 26
IAD
Washington
STL
St. Louis
CA $908 Roundtrip, found 23 hours ago
CA $908
Roundtrip
found 23 hours ago
Select American Airlines flight, departing Fri, Oct 24 from Washington to St. Louis, returning Sun, Oct 26, priced at CA $908 found 23 hours ago
Fri, Oct 24 - Sun, Oct 26
IAD
Washington
STL
St. Louis
CA $1,087 Roundtrip, found 23 hours ago
CA $1,087
Roundtrip
found 23 hours ago
Select American Airlines flight, departing Fri, Oct 24 from Washington to St. Louis, returning Sun, Oct 26, priced at CA $1,087 found 23 hours ago
Fri, Oct 24 - Sun, Oct 26
IAD
Washington
STL
St. Louis
CA $1,099 Roundtrip, found 23 hours ago
CA $1,099
Roundtrip
found 23 hours ago
Select American Airlines flight, departing Fri, Oct 24 from Washington to St. Louis, returning Sun, Oct 26, priced at CA $1,099 found 23 hours ago
Fri, Oct 24 - Sun, Oct 26
IAD
Washington
STL
St. Louis
CA $1,125 Roundtrip, found 23 hours ago
CA $1,125
Roundtrip
found 23 hours ago
Select Delta flight, departing Fri, Oct 24 from Washington to St. Louis, returning Sun, Oct 26, priced at CA $1,125 found 23 hours ago
Fri, Oct 24 - Sun, Oct 26
IAD
Washington
STL
St. Louis
CA $1,126 Roundtrip, found 23 hours ago
CA $1,126
Roundtrip
found 23 hours ago
Select American Airlines flight, departing Fri, Oct 24 from Washington to St. Louis, returning Sun, Oct 26, priced at CA $1,126 found 23 hours ago
Fri, Oct 24 - Sun, Oct 26
IAD
Washington
STL
St. Louis
CA $1,138 Roundtrip, found 23 hours ago
CA $1,138
Roundtrip
found 23 hours ago
Select American Airlines flight, departing Fri, Oct 24 from Washington to St. Louis, returning Sun, Oct 26, priced at CA $1,138 found 23 hours ago
Fri, Oct 24 - Sun, Oct 26
IAD
Washington
STL
St. Louis
CA $1,165 Roundtrip, found 23 hours ago
CA $1,165
Roundtrip
found 23 hours ago
Select American Airlines flight, departing Fri, Oct 24 from Washington to St. Louis, returning Sun, Oct 26, priced at CA $1,165 found 23 hours ago
Fri, Oct 24 - Sun, Oct 26
IAD
Washington
STL
St. Louis
CA $1,166 Roundtrip, found 23 hours ago
CA $1,166
Roundtrip
found 23 hours ago
Select Delta flight, departing Fri, Oct 24 from Washington to St. Louis, returning Sun, Oct 26, priced at CA $1,166 found 23 hours ago
Fri, Oct 24 - Sun, Oct 26
IAD
Washington
STL
St. Louis
CA $1,186 Roundtrip, found 23 hours ago
CA $1,186
Roundtrip
found 23 hours ago
Select American Airlines flight, departing Fri, Oct 24 from Washington to St. Louis, returning Sun, Oct 26, priced at CA $1,186 found 23 hours ago
Fri, Oct 24 - Sun, Oct 26
IAD
Washington
STL
St. Louis
CA $1,200 Roundtrip, found 23 hours ago
CA $1,200
Roundtrip
found 23 hours ago
Select American Airlines flight, departing Fri, Oct 24 from Washington to St. Louis, returning Sun, Oct 26, priced at CA $1,200 found 23 hours ago
Fri, Oct 24 - Sun, Oct 26
IAD
Washington
STL
St. Louis
CA $1,223 Roundtrip, found 23 hours ago
CA $1,223
Roundtrip
found 23 hours ago
Select American Airlines flight, departing Fri, Oct 24 from Washington to St. Louis, returning Sun, Oct 26, priced at CA $1,223 found 23 hours ago
Fri, Oct 24 - Sun, Oct 26
IAD
Washington
STL
St. Louis
CA $1,224 Roundtrip, found 23 hours ago
CA $1,224
Roundtrip
found 23 hours ago
Select American Airlines flight, departing Fri, Oct 24 from Washington to St. Louis, returning Sun, Oct 26, priced at CA $1,224 found 23 hours ago
Fri, Oct 24 - Sun, Oct 26
IAD
Washington
STL
St. Louis
CA $1,242 Roundtrip, found 23 hours ago
CA $1,242
Roundtrip
found 23 hours ago
Select American Airlines flight, departing Fri, Oct 24 from Washington to St. Louis, returning Sun, Oct 26, priced at CA $1,242 found 23 hours ago

Frequently asked questions

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.
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 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 (IAD)

Travelers at IAD love to visit these top cities. Roam to the top destinations from Washington (IAD) 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.