€97 Cheap Flights Washington to St. Louis (DCA-STL)

View €97 flight on Sat, 17 Jan 2026Opens in a new window

Popular airlines from Ronald Reagan Washington National Airport (DCA) to St. Louis Lambert Intl. Airport (STL)

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Cheap flights from Washington to St. Louis (DCA-STL)

Prices were available within the past 7 days and start at €97 for one-way flights and €194 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Sat, 17 Jan - Sun, 18 Jan
DCA
Washington
STL
St. Louis
€194 Return, found 5 days ago
€194
Return
found 5 days ago
Select American Airlines flight, departing Sat, 17 Jan from Washington to St. Louis, returning Sun, 18 Jan, priced at €194 found 5 days ago
American Airlines
Sat, 24 Jan - Sat, 31 Jan
DCA
Washington
STL
St. Louis
€201 Return, found 2 days ago
€201
Return
found 2 days ago
Select American Airlines flight, departing Sat, 24 Jan from Washington to St. Louis, returning Sat, 31 Jan, priced at €201 found 2 days ago
American Airlines
Sat, 17 Jan - Sun, 18 Jan
DCA
Washington
STL
St. Louis
€203 Return, found 5 days ago
€203
Return
found 5 days ago
Select American Airlines flight, departing Sat, 17 Jan from Washington to St. Louis, returning Sun, 18 Jan, priced at €203 found 5 days ago
American Airlines
Sat, 17 Jan - Sun, 18 Jan
DCA
Washington
STL
St. Louis
€206 Return, found 5 days ago
€206
Return
found 5 days ago
Select American Airlines flight, departing Sat, 17 Jan from Washington to St. Louis, returning Sun, 18 Jan, priced at €206 found 5 days ago
American Airlines
Sat, 24 Jan - Sat, 31 Jan
DCA
Washington
STL
St. Louis
€209 Return, found 2 days ago
€209
Return
found 2 days ago
Select American Airlines flight, departing Sat, 24 Jan from Washington to St. Louis, returning Sat, 31 Jan, priced at €209 found 2 days ago
Delta
Sat, 17 Jan - Sun, 18 Jan
DCA
Washington
STL
St. Louis
€211 Return, found 5 days ago
€211
Return
found 5 days ago
Select Delta flight, departing Sat, 17 Jan from Washington to St. Louis, returning Sun, 18 Jan, priced at €211 found 5 days ago
American Airlines
Sat, 17 Jan - Sun, 18 Jan
DCA
Washington
STL
St. Louis
€214 Return, found 5 days ago
€214
Return
found 5 days ago
Select American Airlines flight, departing Sat, 17 Jan from Washington to St. Louis, returning Sun, 18 Jan, priced at €214 found 5 days ago
American Airlines
Sat, 24 Jan - Sat, 31 Jan
DCA
Washington
STL
St. Louis
€217 Return, found 2 days ago
€217
Return
found 2 days ago
Select American Airlines flight, departing Sat, 24 Jan from Washington to St. Louis, returning Sat, 31 Jan, priced at €217 found 2 days ago
American Airlines
Sat, 17 Jan - Sun, 18 Jan
DCA
Washington
STL
St. Louis
€224 Return, found 5 days ago
€224
Return
found 5 days ago
Select American Airlines flight, departing Sat, 17 Jan from Washington to St. Louis, returning Sun, 18 Jan, priced at €224 found 5 days ago
United
Sat, 24 Jan - Sat, 31 Jan
DCA
Washington
STL
St. Louis
€239 Return, found 2 days ago
€239
Return
found 2 days ago
Select United flight, departing Sat, 24 Jan from Washington to St. Louis, returning Sat, 31 Jan, priced at €239 found 2 days ago

Find the cheapest month to fly from Washington (DCA) to St. Louis (STL)

August is typically the cheapest month to fly

From €101 - €514 per traveller.
Washington to St. Louis route information
Origin airport
Ronald Reagan Washington National
Destination airport
Lambert-St. Louis Intl.
Airlines serving
American Airlines, Delta, United
Return price
€194
Distance
1147 km
Average flight time
1 hour 34 mins

Perfect flights from Washington to St. Louis

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Picture yourself strolling through the streets of , surrounded by breathtaking architecture and absorbing the vibrant atmosphere of this captivating city. Indulge in the mouth-watering local specialties, from tantalizing street food to exquisite fine dining. With Expedia, you can experience all of this and more, without sacrificing your budget.
 
Our flexible Ronald Reagan Washington National to Lambert-St. Louis Intl. ticket options cater to your travel preferences, with incredible one-way fares from €97 and roundtrip prices from €194. Whether you're planning a short city break or a longer adventure, our dynamic pricing ensures that you find the best deals for your journey.
 
But the magic doesn't stop there. Expedia offers a range of partner services to enhance your trip. Rent a car at Lambert-St. Louis Intl. and explore and its surrounding areas at your own pace. Discover hidden gems off the beaten path, and create unforgettable memories. We also provide a handpicked selection of accommodations, from charming bed and breakfasts to luxury hotels, ensuring that you have a comfortable and memorable stay.
 
Planning your next great adventure is a breeze with Expedia. Our user-friendly platform, unbeatable prices, and round-the-clock customer support are designed to make your travel experience seamless and stress-free. So, why wait? Book your to travel arrangements today and embark on the journey of a lifetime in St. Louis.

Frequently asked questions

How much is a flight from Ronald Reagan Washington National Airport (DCA) to STL?
Within the past 7 days on Expedia, for flights departing within the next year, the lowest price advertised for a round-trip journey between Ronald Reagan Washington National Airport (DCA) and Lambert-St. Louis Intl. Airport (STL) was €194. Fares this good don't last forever, so make sure you book yours ASAP. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from DCA to Lambert Field?
Each airline has its own terms and conditions. If you decide to cancel your trip, visit our Customer Service Portal.
How do I find cheap flights from National Airport to Lambert Field that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for Ronald Reagan Washington National Airport (DCA) to Lambert Field flights, you'll see a "no change fees" filter for you to select.
How far is the flight from National Airport to St. Louis Lambert International Airport?
It's just 1,150 kilometres between Arlington and St. Louis. Chances are you'll spend more time travelling to and from the airport than actually flying!
Which airlines fly direct from DCA to Lambert-St. Louis Intl. Airport (STL)?
Southwest Airlines (WN) is a popular option. It operates 117 flights between Ronald Reagan Washington National Airport (DCA) and St. Louis Lambert International Airport each month. After more options? Check out the fares with American Airlines (AA). This carrier offers 108 flights every month between these destinations.
Are DCA to Lambert Field flight tickets cheaper when they're purchased at the last minute?
It is possible to get amazing last-minute deals from DCA to Lambert Field, but it can also be hit-or-miss. As many airlines release prices up to a year in advance, it's worthwhile keeping an eye on fares early and being ready to pounce when you spot a good bargain. Expedia compares carrier prices and updates flight deals all the time, so you can feel confident knowing you're always getting the latest offers.

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