￥23,380 Cheap Flights from Washington (DCA) to St. Louis (STL)

View ￥23,380 flight on Fri, Jan 30, 2026Opens in a new window

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

  • notification illustration

    Be in the know

    Get alerts if flight prices drop or rise*
  • deals illustration

    Book smarter

    Save up to 40% on select hotels after you book a flight*
  • trophy illustration

    Earn twice

    Earn your airline miles on top of our rewards
    Sign in

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

Prices were available within the past 7 days and start at ￥23,380 for one-way flights and for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

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

August is typically the cheapest month to fly

From ￥18,180 - ￥92,862 per traveler.

Frequently asked questions

How much is a flight from DCA to Lambert-St. Louis Intl. Airport (STL)?
Within the past 7 days on Expedia, for flights departing within the next year, the lowest price advertised for a round-trip journey from Ronald Reagan Washington National Airport (DCA) to Lambert-St. Louis Intl. Airport (STL) was . Fares this cheap don't stick around for long, 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 St. Louis Lambert International Airport?
When it comes to cancellation fees, every airline has its own set of 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-St. Louis Intl. Airport (STL) 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 St. Louis Lambert International Airport flights, you'll see a "no change fees" filter for you to select.
How many hours is the flight from DCA to Lambert Field?
It only takes roughly 2 hours and 26 minutes to travel from Ronald Reagan Washington National Airport (DCA) to Lambert Field — just enough time for a nap. You'll be landing in St. Louis by the time you wake up.
How far is the flight from Ronald Reagan Washington National Airport (DCA) to Lambert-St. Louis Intl. Airport (STL)?
That new movie you've been desperate to see will have to wait — the flight distance between Ronald Reagan Washington National Airport (DCA) and Lambert-St. Louis Intl. Airport (STL) is only 1,150 kilometers. The captain will be instructing you to put your seat upright for touchdown before you know it.
Which airlines fly direct from DCA to St. Louis Lambert International Airport?
If you want to fly directly from National Airport to Lambert Field, American Airlines (AA) is a top option. It operates 78 flights every month between Arlington and St. Louis.
Are DCA to St. Louis Lambert International Airport flight tickets cheaper when they're purchased at the last minute?
Last-minute planners can sometimes score a bargain, with some super cheap airfares from National Airport to STL cropping up a few weeks before the date of departure. If you'd rather plan ahead of time, Expedia compares and updates all the best flight deals regularly — as early as a year in advance in some cases. It depends on the carrier though, as not every airline releases prices so far in advance.

Travel information

Origin airport
Ronald Reagan Washington National
Destination airport
Lambert-St. Louis Intl.
Distance
1147 km
Average flight time
1 hour 25 mins

Book with confidence

Washington to St. Louis Flights

Sometimes you just need to get out of town or maybe you’re looking for a change of scenery. Regardless of the reason, a flight from Washington to will do just the trick! Go on, plan to see all the famous landmarks and eat your weight in the local cuisine. Your trip is beckoning, so answer the call by packing your suitcase and filling your travel itinerary with exploring St. Louis.

Whether you’re flying for business or jet-setting on your personal time, you’ve come to the right place. Here at Expedia.com, we’ll pair you up with DCA to STL flights that won’t make your bank account wince. Ready to temporarily leave behind Washington for new horizons? Browse through our cheap airfare, and filter by flight times and dates until you find just what you had in mind. From flights without layovers to ones that arrive early in the morning, you’ll come across plane tickets that suit your travel preferences. You can even bundle your flight to STL with hotels and car rentals to score even bigger savings.

All set to hit the clouds? Book your travel arrangements with us today and have left-over money to put toward your travel outings and adventures.

Washington to St. Louis Flights

Explore a world of travel with Expedia

*Available to Expedia members.