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176 € 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 207 €. Find the lowest prices on one-way and return tickets right here.
St Louis.176 € per passenger.Departing Sat, 10 Oct, returning Thu, 15 Oct.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Washington Ronald Reagan on Sat, 10 Oct, arriving in St Louis.Inbound direct flight with Southwest Airlines departs from St Louis on Thu, 15 Oct, arriving in Washington Ronald Reagan.Price includes taxes and charges.From 176 €, select.
St Louis.193 € per passenger.Departing Thu, 10 Dec, returning Wed, 16 Dec.Return flight with United.Outbound indirect flight with United, departs from Washington Ronald Reagan on Thu, 10 Dec, arriving in St Louis.Inbound indirect flight with United, departs from St Louis on Wed, 16 Dec, arriving in Washington Ronald Reagan.Price includes taxes and charges.From 193 €, select.
St Louis.207 € per passenger.Departing Mon, 9 Nov, returning Sat, 14 Nov.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Washington Ronald Reagan on Mon, 9 Nov, arriving in St Louis.Inbound direct flight with Southwest Airlines departs from St Louis on Sat, 14 Nov, arriving in Washington Ronald Reagan.Price includes taxes and charges.From 207 €, select.
St Louis.207 € per passenger.Departing Sat, 5 Sep, returning Sat, 5 Sep.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Washington Ronald Reagan on Sat, 5 Sep, arriving in St Louis.Inbound direct flight with Southwest Airlines departs from St Louis on Sat, 5 Sep, arriving in Washington Ronald Reagan.Price includes taxes and charges.From 207 €, select.
St Louis.207 € per passenger.Departing Thu, 6 Aug, returning Mon, 10 Aug.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Washington Ronald Reagan on Thu, 6 Aug, arriving in St Louis.Inbound direct flight with Southwest Airlines departs from St Louis on Mon, 10 Aug, arriving in Washington Ronald Reagan.Price includes taxes and charges.From 207 €, select.
St Louis.208 € per passenger.Departing Wed, 26 Aug, returning Wed, 2 Sep.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Washington Ronald Reagan on Wed, 26 Aug, arriving in St Louis.Inbound direct flight with Southwest Airlines departs from St Louis on Wed, 2 Sep, arriving in Washington Ronald Reagan.Price includes taxes and charges.From 208 €, select.
St Louis.226 € per passenger.Departing Wed, 16 Dec, returning Tue, 22 Dec.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Washington Ronald Reagan on Wed, 16 Dec, arriving in St Louis.Inbound direct flight with Southwest Airlines departs from St Louis on Tue, 22 Dec, arriving in Washington Ronald Reagan.Price includes taxes and charges.From 226 €, select.
St Louis.235 € per passenger.Departing Thu, 14 Jan, returning Thu, 21 Jan.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Washington Ronald Reagan on Thu, 14 Jan, arriving in St Louis.Inbound direct flight with Southwest Airlines departs from St Louis on Thu, 21 Jan, arriving in Washington Ronald Reagan.Price includes taxes and charges.From 235 €, select.
St Louis.244 € per passenger.Departing Tue, 28 Jul, returning Wed, 5 Aug.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Washington Ronald Reagan on Tue, 28 Jul, arriving in St Louis.Inbound indirect flight with Frontier Airlines, departs from St Louis on Wed, 5 Aug, arriving in Washington Ronald Reagan.Price includes taxes and charges.From 244 €, select.
St Louis.251 € per passenger.Departing Wed, 30 Sep, returning Fri, 9 Oct.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Washington Ronald Reagan on Wed, 30 Sep, arriving in St Louis.Inbound direct flight with Southwest Airlines departs from St Louis on Fri, 9 Oct, arriving in Washington Ronald Reagan.Price includes taxes and charges.From 251 €, select.
St Louis.276 € per passenger.Departing Wed, 22 Jul, returning Wed, 29 Jul.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Washington Ronald Reagan on Wed, 22 Jul, arriving in St Louis.Inbound indirect flight with Frontier Airlines, departs from St Louis on Wed, 29 Jul, arriving in Washington Ronald Reagan.Price includes taxes and charges.From 276 €, select.
St Louis.292 € per passenger.Departing Sat, 26 Dec, returning Sat, 2 Jan.Return flight with Delta.Outbound indirect flight with Delta, departs from Washington Ronald Reagan on Sat, 26 Dec, arriving in St Louis.Inbound indirect flight with Delta, departs from St Louis on Sat, 2 Jan, arriving in Washington Ronald Reagan.Price includes taxes and charges.From 292 €, select.
St Louis.293 € per passenger.Departing Sat, 26 Dec, returning Sat, 2 Jan.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Washington Ronald Reagan on Sat, 26 Dec, arriving in St Louis.Inbound direct flight with Southwest Airlines departs from St Louis on Sat, 2 Jan, arriving in Washington Ronald Reagan.Price includes taxes and charges.From 293 €, select.
St Louis.293 € per passenger.Departing Sat, 1 May, returning Sat, 1 May.Return flight with Delta.Outbound indirect flight with Delta, departs from Washington Ronald Reagan on Sat, 1 May, arriving in St Louis.Inbound indirect flight with Delta, departs from St Louis on Sat, 1 May, arriving in Washington Ronald Reagan.Price includes taxes and charges.From 293 €, select.
St Louis.303 € per passenger.Departing Tue, 28 Jul, returning Wed, 5 Aug.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Washington Ronald Reagan on Tue, 28 Jul, arriving in St Louis.Inbound direct flight with Southwest Airlines departs from St Louis on Wed, 5 Aug, arriving in Washington Ronald Reagan.Price includes taxes and charges.From 303 €, select.
St Louis.412 € per passenger.Departing Tue, 28 Jul, returning Fri, 31 Jul.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Washington Ronald Reagan on Tue, 28 Jul, arriving in St Louis.Inbound direct flight with Southwest Airlines departs from St Louis on Fri, 31 Jul, arriving in Washington Ronald Reagan.Price includes taxes and charges.From 412 €, 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 October.
Jul
from 276 €
Aug
from 207 €
Sep
from 207 €
Oct
from 176 €
Nov
from 207 €
Dec
from 193 €
Jan
from 235 €
Feb
Find prices
Mar
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Apr
Find prices
May
from 293 €
Jun
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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.

St Louis

20km from central St Louis
ClosestCheapest
from 176 €
Search flights

Belleville

32km from central St Louis
from 392 €
Search flights

Washington D.C. to St Louis: Flight information

The things to know before you go.
Cheapest flight found176 €
Cheapest month to flyOctober
Average flight time2 hrs, 29 mins
Most popular airlineSouthwest Airlines
Average flights per week73

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

The best price we found for a return flight from Washington Ronald Reagan to St Louis is 176 €. 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.
2 hours and 29 minutes is the average flight time from Washington Ronald Reagan to St Louis.
Southwest Airlines, American Airlines and PSA Airlines fly direct from Washington Ronald Reagan to St Louis.
As of July 2026, there are 73 flights per week flying from Washington Ronald Reagan to St Louis.
The cheapest month to fly from Washington Ronald Reagan to St Louis is usually October.
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 Saturday, 10 October 2026.
Yes – the average flight time is 2 hours and 29 minutes.
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.

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.

Currently, Southwest Airlines offers the cheapest flight tickets to St Louis.

Travelling from Washington Ronald Reagan Airport (DCA) to St Louis Airport (STL): what you need to know

  • The average duration of a direct flight from Washington Ronald Reagan Airport to St Louis Airport is 2 hours 25 minutes.

  • St Louis's timezone is UTC-6, which makes St Louis one hour behind Washington DC.

  • You can choose from 37 weekly Washington Ronald Reagan Airport to St Louis Airport flights. The 06:30 departure with Southwest Airlines is the earliest available. American Airlines operates the latest service of the day at 22:00.

  • Your DCA to STL flight won't wait if you're late, so get to the airport with time to spare. Arrive up to one hour in advance for domestic flights and two hours ahead for international travel.

  • You'll likely experience longer lines in popular months such as August. Arriving up to four hours ahead of an international flight and two hours for a domestic departure is a good idea.

  • Getting to St Louis (and then seeing more of the United States!) is a breeze with American Airlines. This popular airline has direct flights from Washington Ronald Reagan Airport to St Louis Airport.

  • The airline that passengers book most often on this route is American Airlines.

  • The most punctual carrier that offers DCA to STL flights is Southwest Airlines. Its services land without delay 73.1% of the time.

  • We make it a piece of cake to book a flight with a stopover. To see all your options for tickets from Washington Ronald Reagan Airport to St Louis Airport, deselect 'Direct flights only.' Then, pick a flight that has a stop long enough to visit your chosen city. Stopovers between DCA and STL include:

    • Detroit Wayne County Airport

    • Nashville Airport

    • Chicago Midway Airport

How to find the cheapest flights from Washington Ronald Reagan Airport (DCA) to St Louis Airport (STL)

  • At the moment, 88 € is the cheapest price we've seen for a one-way Washington Ronald Reagan Airport to St Louis Airport flight. The best price for a return ticket is 176 €. Keep in mind that fares may change due to availability when booking.

  • Don't leave everything to the last minute. You're more likely to find cheap tickets from DCA to STL if you book ahead. Airlines often have some terrific early bird discounts.

  • The cheapest month for flights from Washington Ronald Reagan Airport to St Louis Airport is May. Use the 'Whole month' tool to see the lowest prices if you have flexible travel dates.

  • Never miss a deal on cheap flights from DCA to STL by creating a Price Alert. We'll send you an email or notification on the app when a lower fare pops up.

  • Find the ideal flight for you with the help of the filters. To see the 'Cheapest,' 'Fastest' or 'Best' flights from Washington Ronald Reagan Airport to St Louis Airport, use the 'Sort by' tool. You can also filter by arrival and departure times, airline, and number of stops.

Handy information about Washington Ronald Reagan Airport (DCA)

  • You'll find DCA at 1 Aviation Circle.

  • When it comes to the on-time performance of Washington Ronald Reagan Airport, data shows 71% of flights meet their scheduled arrival time.

  • Central Washington DC to Washington Ronald Reagan Airport is around 6 kilometres. Depending on traffic, it'll take about 10 minutes to get there if you're driving, catching a taxi or ride-sharing.

  • Expect a trip time of roughly 25 minutes when using public transport.

  • Get your break off to a hassle-free start by staying near DCA. Whether you're taking an early flight from Washington Ronald Reagan Airport to St Louis Airport or want to avoid feeling rushed, these hotels are the answer:

Arriving at St Louis Airport (STL)

When to fly to St Louis Airport (STL)

  • July is the busiest month for flights from Washington Ronald Reagan Airport to St Louis Airport. For a quieter experience, go to St Louis in March.

  • The warmest month in St Louis is July, with temperatures ranging between 17ºC (63ºF) and 33ºC (91ºF). Book your flights from Washington Ronald Reagan Airport to St Louis Airport in this month if this is the type of weather you like.

  • Look for cheap tickets from DCA to STL in January if you'd rather travel during cooler conditions. Temperatures are at their lowest then, ranging between -7ºC (19ºF) and 8ºC (46ºF) on average.

Explore more of the United States

  • St Louis is easy to fall in love with, but there are so many other parts of the United States you should also see. Around 418 kilometres north-east of St Louis, a visit to Chicago will keep you on the move. Start with leading sights like Millennium Park, Art Institute of Chicago and Willis Tower.

  • Around 370 kilometres east of St Louis, Indianapolis is another essential stop in the United States. Get a taste of what this destination has to offer at Lucas Oil Stadium, Eiteljorg Museum and The Children's Museum of Indianapolis.

Plan the rest of your trip from Washington D.C. to St Louis

Prices shown on this page are estimated lowest prices only. Found in the last 12 days.