Cheap flights from Baltimore to St. Louis

Flights overview

Useful information for finding cheap flights from Baltimore to St. Louis and booking your next trip
Cheapest round-trip flights $160
Frontier 1 stop 13 hr Sat, May 2 — Sun, May 3
The cheapest round-trip flight from Baltimore to St. Louis is currently $160
Cheapest one-way flight $80
Frontier 1 stop 7 hr Wed, May 13
The cheapest one-way flight from Baltimore to St. Louis is currently $80
Cheapest nonstop flights $240
Southwest Nonstop 3 hr Sat, Apr 25 — Mon, Apr 27
The cheapest nonstop round-trip flight from Baltimore to St. Louis is currently $240
Last-minute weekend getaway $360
Frontier 1 stop 23 hr Thu, Mar 12 — Mon, Mar 16
The cheapest last-minute weekend getaway from Baltimore to St. Louis is currently $360
Cheapest business class flights $404
Frontier 1 stop 13 hr Sat, May 2 — Sun, May 3
The cheapest business class round-trip flight from Baltimore to St. Louis is currently $404
Fastest flight 2 hr 10 min The fastest nonstop flight from Baltimore to St. Louis takes 2 hr 10 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 Baltimore to St. Louis is typically September. The most expensive month to fly is typically March.
September
Cheapest
Typical prices: $140–215
March
Most expensive
Typical prices: $225–340

Popular airlines from Baltimore to St. Louis

  • Southwest
    Nonstop
    from $240
    Typical price: $225–450
    52 weekly nonstop flights
    BWI, DCA - STL Every day
    2024 weekly connecting flights
    BWI, DCA, IAD - STL Every day
  • United
    Nonstop
    from $251
    Typical price: $240–475
    14 weekly nonstop flights
    IAD - STL Every day
    1078 weekly connecting flights
    BWI, DCA, IAD - STL Every day
  • American
    Nonstop
    from $240
    Typical price: $225–450
    18 weekly nonstop flights
    DCA - STL Every day
    806 weekly connecting flights
    BWI, DCA, IAD - STL Every day
  • Delta
    from $260
    Typical price: $245–540
    843 weekly connecting flights
    BWI, DCA, IAD - STL Every day
  • Frontier
    from $160
    Typical price: $180–400
    54 weekly connecting flights
    BWI, DCA, IAD - STL Every day
  • Alaska
    from $535
    Typical price: $610–1,400
    33 weekly connecting flights
    BWI, DCA, IAD - STL Every day

Popular airports near Baltimore

  • Baltimore/Washington International Thurgood Marshall Airport (BWI) (BWI)
    Baltimore United States 19 min 8 mi
  • Dulles International Airport (IAD)
    Washington United States 1 hr 23 min 51 mi
  • Ronald Reagan Washington National Airport (DCA)
    Washington United States 1 hr 38 mi
  • Philadelphia International Airport (PHL)
    Philadelphia United States 1 hr 34 min 83 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
  • Columbia Regional Airport (COU)
    Columbia United States 2 hr 7 min 109 mi
  • MidAmerica St. Louis Airport (BLV)
    Belleville United States 34 min 20 mi

Frequently asked questions about flying from Baltimore to St. Louis

The cheapest flights from Baltimore to St. Louis are usually in September. Typical ticket prices in September range from $140 to $215.
The cheapest round-trip flight from Baltimore to St. Louis recently found on Google Flights was with Frontier from $160. The cheapest one-way flight was with Frontier from $80.

Some of the cheapest round-trip deals we found with different airlines:
  • The cheapest Southwest flight from Baltimore to St. Louis is $240, flying from Apr 25 to Apr 27.
  • The cheapest United flight from Baltimore to St. Louis is $251, flying from Apr 25 to Apr 27.
  • The cheapest American flight from Baltimore to St. Louis is $240, flying from May 2 to May 4.
  • The cheapest Delta flight from Baltimore to St. Louis is $260, flying from Apr 18 to Apr 20.
  • The cheapest Frontier flight from Baltimore to St. Louis is $160, flying from May 2 to May 3.
  • The cheapest Alaska flight from Baltimore to St. Louis is $535, flying from Apr 25 to Apr 26.
The cheapest round-trip flight from Baltimore to St. Louis starts at $160 from Sat, May 2 to Sun, May 3. The cheapest one-way flight starts at $80 and departs on Wed, May 13.
2 hr 10 min is the shortest flight time from Baltimore 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 Baltimore 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 Baltimore 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 Baltimore to St. Louis.

In terms of nonstop flights, Southwest is the most popular. Southwest offers 52 nonstop flights and 2,024 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 Baltimore to St. Louis are:
  • United offers 14 nonstop flights and 1,078 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) .
  • American offers 18 nonstop flights and 806 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) .
  • Delta offers 843 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 54 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 33 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 Baltimore and St. Louis.
The cheapest round-trip flight from Baltimore to St. Louis recently found on Google Flights was with Frontier from $160. The cheapest one-way flight was with Frontier from $80.

Some of the cheapest round-trip deals we found with different airlines:
  • The cheapest Southwest flight from Baltimore to St. Louis is $240, flying from Apr 25 to Apr 27.
  • The cheapest United flight from Baltimore to St. Louis is $251, flying from Apr 25 to Apr 27.
  • The cheapest American flight from Baltimore to St. Louis is $240, flying from May 2 to May 4.
  • The cheapest Delta flight from Baltimore to St. Louis is $260, flying from Apr 18 to Apr 20.
  • The cheapest Frontier flight from Baltimore to St. Louis is $160, flying from May 2 to May 3.
  • The cheapest Alaska flight from Baltimore to St. Louis is $535, flying from Apr 25 to Apr 26.
Southwest, American and United fly direct from Baltimore to St. Louis.
  • There are 52 Southwest direct flights from Baltimore to St. Louis per week. Flights are available every day.
  • There are 14 United direct flights from Baltimore to St. Louis per week. Flights are available every day.
  • There are 18 American direct flights from Baltimore 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 Baltimore and St. Louis at price $360 is offered by Frontier from Thu, Mar 12 to Mon, Mar 16.
Southwest, American and United fly direct from Baltimore to St. Louis.
  • There are 52 Southwest direct flights from Baltimore to St. Louis per week. Flights are available every day.
  • There are 14 United direct flights from Baltimore to St. Louis per week. Flights are available every day.
  • There are 18 American direct flights from Baltimore 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 Baltimore to St. Louis on a daily basis.
The cheapest direct (nonstop) round-trip flights between Baltimore and St. Louis start at $240 from Sat, Apr 25 to Mon, Apr 27 with Southwest.
It's easy to find nonstop flights with Google Flights! Once you've searched for flights from Baltimore 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 Baltimore and St. Louis start at $404 from Sat, May 2 to Sun, May 3 with Frontier.
The cheapest economy class round-trip flights between Baltimore and St. Louis start at $160 from Sat, May 2 to Sun, May 3.
To book business class trips from Baltimore 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 Baltimore and St. Louis starts at $360 from Thu, Mar 12 to Mon, Mar 16 with Frontier.
The cheapest last-minute deal between Baltimore and St. Louis at price $360 is offered by Frontier from Thu, Mar 12 to Mon, Mar 16.
To find last-minute flight deals from Baltimore 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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