Cheap flights from Washington, D.C. to St. Louis

Flights overview

Useful information for finding cheap flights from Washington, D.C. to St. Louis and booking your next trip
Cheapest round-trip flights $161
Frontier 1 stop 28 hr Thu, Feb 26 — Mon, Mar 2
The cheapest round-trip flight from Washington, D.C. to St. Louis is currently $161
Cheapest one-way flight $70
Frontier 1 stop 29 hr Wed, Feb 18
The cheapest one-way flight from Washington, D.C. to St. Louis is currently $70
Cheapest nonstop flights $261
Southwest Nonstop 3 hr Sat, Feb 28 — Mon, Mar 2
The cheapest nonstop round-trip flight from Washington, D.C. to St. Louis is currently $261
Last-minute weekend getaway $202
Frontier 1 stop 19 hr Thu, Jan 29 — Mon, Feb 2
The cheapest last-minute weekend getaway from Washington, D.C. to St. Louis is currently $202
Cheapest business class flights $463
American 1 stop 8 hr Thu, Feb 19 — Mon, Feb 23
The cheapest business class round-trip flight from Washington, D.C. to St. Louis is currently $463
Fastest flight 2 hr 20 min The fastest nonstop flight from Washington, D.C. to St. Louis takes 2 hr 20 min
Nonstop flights Every day There are direct flights on this route every day.

When is the cheapest time to fly?

The cheapest month to fly from Washington, D.C. to St. Louis is typically September. The most expensive month to fly is typically July.
September
Cheapest
Typical prices: $140–215
July
Most expensive
Typical prices: $215–295

Popular airlines from Washington, D.C. to St. Louis

  • Southwest
    Nonstop
    from $261
    Typical price: $220–450
    41 weekly nonstop flights
    BWI, DCA - STL Every day
    1737 weekly connecting flights
    BWI, DCA, IAD - STL Every day
  • American
    Nonstop
    from $261
    Typical price: $220–450
    20 weekly nonstop flights
    DCA - STL Every day
    875 weekly connecting flights
    BWI, DCA, IAD - STL Every day
  • United
    Nonstop
    from $261
    Typical price: $235–480
    14 weekly nonstop flights
    IAD - STL Every day
    1037 weekly connecting flights
    BWI, DCA, IAD - STL Every day
  • Delta
    from $281
    Typical price: $235–540
    834 weekly connecting flights
    BWI, DCA, IAD - STL Every day
  • Frontier
    from $161
    Typical price: $170–390
    52 weekly connecting flights
    BWI, DCA, IAD - STL Every day
  • Alaska
    from $474
    Typical price: $610–1,400
    21 weekly connecting flights
    BWI, DCA, IAD - STL Every day

Popular airports near Washington, D.C.

  • Ronald Reagan Washington National Airport (DCA)
    Washington United States 18 min 4 mi
  • Dulles International Airport (IAD)
    Washington United States 52 min 22 mi
  • Baltimore/Washington International Thurgood Marshall Airport (BWI) (BWI)
    Baltimore United States 49 min 27 mi
  • Philadelphia International Airport (PHL)
    Philadelphia United States 2 hr 20 min 116 mi

Popular airports near St. Louis

  • St. Louis Lambert International Airport (STL)
    St. Louis United States 21 min 12 mi
  • General Wayne A. Downing Peoria International Airport (PIA)
    Peoria United States 2 hr 35 min 143 mi
  • MidAmerica St. Louis Airport (BLV)
    Belleville United States 34 min 20 mi
  • Indianapolis International Airport (IND)
    Indianapolis United States 3 hr 29 min 222 mi

Frequently asked questions about flying from Washington, D.C. to St. Louis

The cheapest flights from Washington, D.C. to St. Louis are usually in September. Typical ticket prices in September range from $140 to $215.
The cheapest round-trip flight from Washington, D.C. to St. Louis recently found on Google Flights was with Frontier from $161. The cheapest one-way flight was with Frontier from $70.

Some of the cheapest round-trip deals we found with different airlines:
  • The cheapest Southwest flight from Washington, D.C. to St. Louis is $261, flying from Feb 28 to Mar 2.
  • The cheapest American flight from Washington, D.C. to St. Louis is $261, flying from Feb 21 to Feb 23.
  • The cheapest United flight from Washington, D.C. to St. Louis is $261, flying from Feb 21 to Feb 23.
  • The cheapest Delta flight from Washington, D.C. to St. Louis is $281, flying from Feb 28 to Mar 2.
  • The cheapest Frontier flight from Washington, D.C. to St. Louis is $161, flying from Feb 19 to Feb 23.
  • The cheapest Alaska flight from Washington, D.C. to St. Louis is $474, flying from Feb 20 to Feb 23.
The cheapest round-trip flight from Washington, D.C. to St. Louis starts at $161 from Thu, Feb 26 to Mon, Mar 2. The cheapest one-way flight starts at $70 and departs on Wed, Feb 18.
2 hr 20 min is the shortest flight time from Washington, D.C. to St. Louis.
Apr–Sep is the most popular time to visit, coinciding with hot, humid summer and events like Fair St. Louis, a huge Fourth of July festival at Forest Park, and the Taste of St. Louis food festival (Sep). Weather in winter is cold, with occasional snow.
It's easy to use Google Flights to find the cheapest days to fly from Washington, D.C. to St. Louis.
Just click the Departure label near the top of the page to open the calendar. Choose a start date and a return date to see how the round-trip fare changes on those specific days.
Adjust the trip type to see one-way fares. The cheapest available flights are highlighted and easy to spot. Once you settle on dates, click the Search button to see flight options and book the deal.

You can also turn on price tracking to get alerts if the price changes for a route or flight.
What counts as the best airline for your flights from Washington, D.C. to St. Louis really depends on your individual needs. You may have a favorite carrier or a loyalty program you like, but price, convenience, and airports served also come into play. Flexibility and booking terms – Can you change flights if you want to stay longer or get a refund if you have to postpone your trip? – are also factors that help determine which airline is best to fly from Washington, D.C. to St. Louis.

In terms of nonstop flights, Southwest is the most popular. Southwest offers 41 nonstop flights and 1,737 connecting flights per week. Southwest flies from Baltimore/Washington International Thurgood Marshall Airport (BWI) (BWI) , Ronald Reagan Washington National Airport (DCA) , Dulles International Airport (IAD) to St. Louis Lambert International Airport (STL) .

Other popular airlines flying from Washington, D.C. to St. Louis are:
  • American offers 20 nonstop flights and 875 connecting flights per week. American flies from Baltimore/Washington International Thurgood Marshall Airport (BWI) (BWI) , Ronald Reagan Washington National Airport (DCA) , Dulles International Airport (IAD) to St. Louis Lambert International Airport (STL) .
  • United offers 14 nonstop flights and 1,037 connecting flights per week. United flies from Baltimore/Washington International Thurgood Marshall Airport (BWI) (BWI) , Ronald Reagan Washington National Airport (DCA) , Dulles International Airport (IAD) to St. Louis Lambert International Airport (STL) .
  • Delta offers 834 connecting flights per week. Delta flies from Baltimore/Washington International Thurgood Marshall Airport (BWI) (BWI) , Ronald Reagan Washington National Airport (DCA) , Dulles International Airport (IAD) to St. Louis Lambert International Airport (STL) .
  • Frontier offers 52 connecting flights per week. Frontier flies from Baltimore/Washington International Thurgood Marshall Airport (BWI) (BWI) , Ronald Reagan Washington National Airport (DCA) , Dulles International Airport (IAD) to St. Louis Lambert International Airport (STL) .
  • Alaska offers 21 connecting flights per week. Alaska flies from Baltimore/Washington International Thurgood Marshall Airport (BWI) (BWI) , Ronald Reagan Washington National Airport (DCA) , Dulles International Airport (IAD) to St. Louis Lambert International Airport (STL) .
The number of connecting flights refers to distinct flights with at least one stop between Washington, D.C. and St. Louis.
The cheapest round-trip flight from Washington, D.C. to St. Louis recently found on Google Flights was with Frontier from $161. The cheapest one-way flight was with Frontier from $70.

Some of the cheapest round-trip deals we found with different airlines:
  • The cheapest Southwest flight from Washington, D.C. to St. Louis is $261, flying from Feb 28 to Mar 2.
  • The cheapest American flight from Washington, D.C. to St. Louis is $261, flying from Feb 21 to Feb 23.
  • The cheapest United flight from Washington, D.C. to St. Louis is $261, flying from Feb 21 to Feb 23.
  • The cheapest Delta flight from Washington, D.C. to St. Louis is $281, flying from Feb 28 to Mar 2.
  • The cheapest Frontier flight from Washington, D.C. to St. Louis is $161, flying from Feb 19 to Feb 23.
  • The cheapest Alaska flight from Washington, D.C. to St. Louis is $474, flying from Feb 20 to Feb 23.
Southwest, American and United fly direct from Washington, D.C. to St. Louis.
  • There are 41 Southwest direct flights from Washington, D.C. to St. Louis per week. Flights are available every day.
  • There are 20 American direct flights from Washington, D.C. to St. Louis per week. Flights are available every day.
  • There are 14 United direct flights from Washington, D.C. to St. Louis per week. Flights are available every day.
Use the Stops filter while searching for flights, to see only nonstop options in your results.
The cheapest last-minute deal between Washington, D.C. and St. Louis at price $202 is offered by Frontier from Thu, Jan 29 to Mon, Feb 2.
Southwest, American and United fly direct from Washington, D.C. to St. Louis.
  • There are 41 Southwest direct flights from Washington, D.C. to St. Louis per week. Flights are available every day.
  • There are 20 American direct flights from Washington, D.C. to St. Louis per week. Flights are available every day.
  • There are 14 United direct flights from Washington, D.C. to St. Louis per week. Flights are available every day.
Use the Stops filter while searching for flights, to see only nonstop options in your results.
There are direct flights from Washington, D.C. to St. Louis on a daily basis.
The cheapest direct (nonstop) round-trip flights between Washington, D.C. and St. Louis start at $261 from Sat, Feb 28 to Mon, Mar 2 with Southwest.
It's easy to find nonstop flights with Google Flights! Once you've searched for flights from Washington, D.C. to St. Louis, just select the nonstop flights only option in the 'Stops’ filter in the search form and view all available direct flights and their prices.
The cheapest business class round-trip flights between Washington, D.C. and St. Louis start at $463 from Thu, Feb 19 to Mon, Feb 23 with American.
The cheapest economy class round-trip flights between Washington, D.C. and St. Louis start at $161 from Thu, Feb 26 to Mon, Mar 2.
To book business class trips from Washington, D.C. to St. Louis, look for the default Economy selection at the top, and change it to your desired cabin class such as Premium Economy, Business Class, or First Class. You can then select your departure and arrival dates, consider available options, and book your business travel.

You can also adjust the trip type to view one-way fares.
The best last-minute getaway deal for the next weekend between Washington, D.C. and St. Louis starts at $202 from Thu, Jan 29 to Mon, Feb 2 with Frontier.
The cheapest last-minute deal between Washington, D.C. and St. Louis at price $202 is offered by Frontier from Thu, Jan 29 to Mon, Feb 2.
To find last-minute flight deals from Washington, D.C. to St. Louis, start by entering the city names, select the desired departure and return dates, and hit the Search button to view flight options.

You can check for last-minute flights for the same day or adjust the trip type to see one-way fares.

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