Cheap Flights from Washington Ronald Reagan to St Louis

Compare Washington Ronald Reagan to St Louis flight deals

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Flight deals from Washington Ronald Reagan to St Louis

Looking for a cheap last-minute deal or the best return flight from Washington Ronald Reagan Airport to St Louis Airport? If you want to travel next month, return fares start from Rs39,019. Find the lowest prices on one-way and return tickets right here.

St Louis.Rs21,063 per passenger.Departing Sat, 9 May.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Washington Ronald Reagan on Sat, 9 May, arriving in St Louis.Price includes taxes and charges.From Rs21,063, select.

St Louis.Rs27,056 per passenger.Departing Fri, 5 Jun.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Washington Ronald Reagan on Fri, 5 Jun, arriving in St Louis.Price includes taxes and charges.From Rs27,056, select.

St Louis.Rs32,490 per passenger.Departing Sat, 25 Apr.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Washington Ronald Reagan on Sat, 25 Apr, arriving in St Louis.Price includes taxes and charges.From Rs32,490, select.

St Louis.Rs32,987 per passenger.Departing Tue, 25 Aug.One-way flight with American Airlines.Outbound direct flight with American Airlines departs from Washington Ronald Reagan on Tue, 25 Aug, arriving in St Louis.Price includes taxes and charges.From Rs32,987, select.

St Louis.Rs32,997 per passenger.Departing Wed, 24 Jun.One-way flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Washington Ronald Reagan on Wed, 24 Jun, arriving in St Louis.Price includes taxes and charges.From Rs32,997, select.

St Louis.Rs33,010 per passenger.Departing Tue, 12 May.One-way flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Washington Ronald Reagan on Tue, 12 May, arriving in St Louis.Price includes taxes and charges.From Rs33,010, select.

St Louis.Rs33,722 per passenger.Departing Thu, 9 Jul.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Washington Ronald Reagan on Thu, 9 Jul, arriving in St Louis.Price includes taxes and charges.From Rs33,722, select.

St Louis.Rs43,917 per passenger.Departing Sat, 17 Oct.One-way flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Washington Ronald Reagan on Sat, 17 Oct, arriving in St Louis.Price includes taxes and charges.From Rs43,917, select.

St Louis.Rs44,019 per passenger.Departing Thu, 9 Jul.One-way flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Washington Ronald Reagan on Thu, 9 Jul, arriving in St Louis.Price includes taxes and charges.From Rs44,019, select.

St Louis.Rs46,616 per passenger.Departing Wed, 16 Dec.One-way flight with Delta.Outbound indirect flight with Delta, departs from Washington Ronald Reagan on Wed, 16 Dec, arriving in St Louis.Price includes taxes and charges.From Rs46,616, select.

St Louis.Rs55,344 per passenger.Departing Sat, 25 Apr.One-way flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Washington Ronald Reagan on Sat, 25 Apr, arriving in St Louis.Price includes taxes and charges.From Rs55,344, select.

Find the cheapest month to fly from Washington Ronald Reagan to St Louis

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Washington Ronald Reagan to St Louis flights are currently cheapest in May.

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Direct flights from Washington Ronald Reagan to St Louis

Washington Ronald Reagan to St Louis: Alternative routes

Compare routes from Washington Ronald Reagan to St Louis below. You may find an airport to fly into that's cheaper, faster, or easier than St Louis.

Washington D.C. to St Louis: Flight information

The things to know before you go.

Cheapest flight found	Rs21,063
Cheapest month to fly	May
Average flight time	2 hrs, 27 mins
Most popular airline	American Airlines
Average flights per week	65

Finding cheap flights from Washington Ronald Reagan to St Louis: Frequently asked questions

How much are return flights from Washington Ronald Reagan to St Louis?

The best price we found for a return flight from Washington Ronald Reagan to St Louis is Rs39,019. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.

How long does it take to fly from Washington Ronald Reagan to St Louis?

2 hours and 27 minutes is the average flight time from Washington Ronald Reagan to St Louis.

Which airlines fly direct from Washington Ronald Reagan to St Louis?

American Airlines, Southwest Airlines and PSA Airlines fly direct from Washington Ronald Reagan to St Louis.

How many flights are there a week from Washington Ronald Reagan to St Louis?

As of April 2026, there are 65 flights per week flying from Washington Ronald Reagan to St Louis.

When is the cheapest time to fly from Washington Ronald Reagan to St Louis?

The cheapest month to fly from Washington Ronald Reagan to St Louis is usually May.

Which upcoming date is cheapest to fly from Washington Ronald Reagan Airport to St Louis Airport on?

After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Washington Ronald Reagan Airport to St Louis Airport on Thursday, 7 May 2026.

Can I get a direct flight from Washington Ronald Reagan Airport to St Louis Airport?

Yes – the average flight time is 2 hours and 27 minutes.

How can I find the best flight deal to St Louis?

We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to St Louis but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.

When is the best time to book flights to St Louis?

We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to St Louis is around 40 days in advance, so don’t leave your flight to the last minute.

Which is the cheapest airline to fly from Washington Ronald Reagan Airport to St Louis with?

Currently, Frontier Airlines and Southwest Airlines offer the cheapest flight tickets to St Louis.

Flying from Ronald Reagan National Airport (DCA) to Lambert-St. Louis International Airport (STL): what you need to know

Around 2 hours 25 minutes is how long you'll be travelling on a direct flight from Ronald Reagan National Airport to Lambert-St. Louis International Airport.
St Louis's timezone is UTC-5, making St Louis one hour behind Washington DC.
Each week, there are 48 Ronald Reagan National Airport to Lambert-St. Louis International Airport flights. If you want to take off early, pick the 06:45 American Airlines flight. If you're eager to make the most of your time before you fly, the latest flight is at 20:02 with American Airlines.
For a stress-free journey, arrive at the airport two hours ahead of international flights and one hour before domestic departures. This way, you'll have plenty of time to board your DCA to STL flight.
During popular months like February, it's a good idea to get to the airport earlier than normal. Arrive two hours before domestic departures and four hours ahead for international flights whenever you're travelling during a peak period in general.
Jetting into St Louis (and then seeing more of United States!) is a cinch with American Airlines. This popular airline offers direct flights from Ronald Reagan National Airport to Lambert-St. Louis International Airport.
Most passengers choose to travel with American Airlines on this route.
With an impressive 80.33% of services arriving as scheduled, American Airlines is the most punctual carrier for DCA to STL flights.
We make it simple to book a flight with a stopover. To see all your options for tickets from Ronald Reagan National Airport to Lambert-St. Louis International Airport, deselect 'Direct flights only.' Then, pick a flight offering a stop long enough to tour your chosen city. Worthwhile stopovers between DCA and STL include:
- Nashville International Airport
- Chicago Midway International Airport
- Detroit Metropolitan Wayne County Airport

How to find the cheapest flights from Ronald Reagan National Airport (DCA) to Lambert-St. Louis International Airport (STL)

Rs21,063 is the lowest price for a one-way Ronald Reagan National Airport to Lambert-St. Louis International Airport flight. A return flight starts at Rs39,019. These fares may change depending on availability.
Book six months before travelling. After looking at the numbers on our calendar, this is how far you should book ahead to find cheap tickets from DCA to STL.
Schedule your trip for May. That's the cheapest month for flights from Ronald Reagan National Airport to Lambert-St. Louis International Airport. If you're flexible with your dates, try out the 'Whole month' tool to see the cheapest price across each month.
Cut down on the time spent looking for cheap flights from DCA to STL by creating a Price Alert. You'll receive an email or notification on the app when a special offer becomes available.
Discover the right flight for you with the help of the filters. To see the 'Best,' 'Fastest' or 'Cheapest' flights from Ronald Reagan National Airport to Lambert-St. Louis International Airport, use the 'Sort by' function. You can also filter by departure and arrival times, airline, and number of stops.

Handy information about Ronald Reagan National Airport (DCA)

You'll find DCA at 1 Aviation Circle.
76.44% of flights that take off from Ronald Reagan National Airport reach their destination on time.
Central Washington DC to Ronald Reagan National Airport is around 8 kilometres. Depending on traffic, it'll take about 15 minutes to get there if you're driving, catching a cab or ride-sharing.
The journey on public transport will take about 45 minutes.
Have an early flight from Ronald Reagan National Airport to Lambert-St. Louis International Airport? Avoid the last-minute rush to the terminal (and enjoy a little extra shut-eye) by picking one of these hotels near DCA:

Arriving at Lambert-St. Louis International Airport (STL)

If you're arriving on a late Ronald Reagan National Airport to Lambert-St. Louis International Airport flight, few things beat the convenience of being near the terminal. Pick up your bags from the carousel and then be showered and sleeping not long after at one of these options near STL:
Grab a Lambert-St. Louis International Airport rental car and explore St Louis and beyond with your own set of wheels. Hertz, Budget and Alamo are popular outlets you can book with here.
For the lowest price, book your ride from Lambert-St. Louis International Airport about one week before you set off.

Getting from Lambert-St. Louis International Airport (STL) to central St Louis

The street address for STL is 10701 Lambert International Blvd..
From Lambert-St. Louis International Airport, St Louis is approximately 26 kilometres away. It takes around 20 minutes to get to the centre driving.
When travelling by public transport, expect a journey of around 35 minutes.

When to fly to Lambert-St. Louis International Airport (STL)

It's time to work out your trip dates for your flight from Ronald Reagan National Airport to Lambert-St. Louis International Airport. July is the most popular month to head to St Louis. If you want a quieter vibe, go in April.
The warmest month in St Louis is July, with the temperature ranging between 17ºC and 33ºC. Lock in your flights from Ronald Reagan National Airport to Lambert-St. Louis International Airport in this month if you enjoy this type of weather.
Search for cheap tickets from DCA to STL in January if you like travelling in cooler conditions. Temperatures are at their lowest around then, ranging between -8ºC and 7ºC on average.

Explore more of United States

St Louis has plenty to offer, but there are so many other parts of United States just waiting to be discovered. About 418 kilometres north-east of St Louis, a visit to Chicago will fill your itinerary to the brim. Don't miss top attractions like Millennium Park, Art Institute of Chicago and LandShark Beer Garden at Navy Pier.
Indianapolis is another well-known destination in United States and is around 370 kilometres east of St Louis. No trip is complete without experiencing The Children's Museum of Indianapolis, Indianapolis Museum of Art and Indianapolis Zoo.