Cheap flights from San Antonio to St. Louis

Flights overview

Useful information for finding cheap flights from San Antonio to St. Louis and booking your next trip
Cheapest round-trip flights $180
Frontier 1 stop 24 hr Fri, May 29 — Sun, May 31
The cheapest round-trip flight from San Antonio to St. Louis is currently $180
Cheapest one-way flight $96
Frontier 1 stop 24 hr Wed, Jun 3
The cheapest one-way flight from San Antonio to St. Louis is currently $96
Cheapest nonstop flights $385
Southwest Nonstop 3 hr Thu, Jun 4 — Mon, Jun 8
The cheapest nonstop round-trip flight from San Antonio to St. Louis is currently $385
Last-minute weekend getaway $232
Frontier 1 stop 15 hr Sat, May 9 — Mon, May 11
The cheapest last-minute weekend getaway from San Antonio to St. Louis is currently $232
Cheapest business class flights $478
Frontier 1 stop 8 hr Fri, Jun 12 — Sun, Jun 14
The cheapest business class round-trip flight from San Antonio to St. Louis is currently $478
Fastest flight 2 hr 10 min The fastest nonstop flight from San Antonio 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 San Antonio to St. Louis is typically October. The most expensive month to fly is typically July.
October
Cheapest
Typical prices: $140–290
July
Most expensive
Typical prices: $230–345

Popular airlines from San Antonio to St. Louis

  • Southwest
    Nonstop
    from $385
    Typical price: $265–550
    13 weekly nonstop flights
    SAT - STL Every day
    967 weekly connecting flights
    SAT - STL Every day
  • American
    from $344
    Typical price: $245–540
    482 weekly connecting flights
    SAT - STL Every day
  • United
    from $311
    Typical price: $245–590
    231 weekly connecting flights
    SAT - STL Every day
  • Delta
    from $395
    Typical price: $255–660
    217 weekly connecting flights
    SAT - STL Every day
  • Frontier
    from $180
    Typical price: $180–400
    20 weekly connecting flights
    SAT - STL Every day
  • Alaska
    from $890
    Typical price: $530–1,250
    14 weekly connecting flights
    SAT - STL Every day

Popular airports near San Antonio

  • San Antonio International Airport (SAT)
    San Antonio United States 19 min 7 mi
  • Austin-Bergstrom International Airport (AUS)
    Austin United States 1 hr 21 min 72 mi
  • George Bush Intercontinental Airport (IAH)
    Houston United States 3 hr 9 min 193 mi
  • William P. Hobby Airport (HOU)
    Houston United States 3 hr 14 min 193 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 36 min 143 mi
  • Columbia Regional Airport (COU)
    Columbia United States 2 hr 8 min 109 mi
  • Indianapolis International Airport (IND)
    Indianapolis United States 3 hr 30 min 222 mi

Frequently asked questions about flying from San Antonio to St. Louis

The cheapest flights from San Antonio to St. Louis are usually in October. Typical ticket prices in October range from $140 to $290.
The cheapest round-trip flight from San Antonio to St. Louis recently found on Google Flights was with Frontier from $180. The cheapest one-way flight was with Frontier from $96.

Some of the cheapest round-trip deals we found with different airlines:
  • The cheapest Southwest flight from San Antonio to St. Louis is $385, flying from May 28 to Jun 1.
  • The cheapest American flight from San Antonio to St. Louis is $344, flying from Jun 4 to Jun 8.
  • The cheapest United flight from San Antonio to St. Louis is $311, flying from May 28 to Jun 1.
  • The cheapest Delta flight from San Antonio to St. Louis is $395, flying from Jun 4 to Jun 8.
  • The cheapest Frontier flight from San Antonio to St. Louis is $180, flying from May 29 to May 31.
  • The cheapest Alaska flight from San Antonio to St. Louis is $890, flying from Jun 4 to Jun 8.
The cheapest round-trip flight from San Antonio to St. Louis starts at $180 from Fri, May 29 to Sun, May 31. The cheapest one-way flight starts at $96 and departs on Wed, Jun 3.
2 hr 10 min is the shortest flight time from San Antonio 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 San Antonio 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 San Antonio 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 San Antonio to St. Louis.

In terms of nonstop flights, Southwest is the most popular. Southwest offers 13 nonstop flights and 967 connecting flights per week. Southwest flies from San Antonio International Airport (SAT) to St. Louis Lambert International Airport (STL) .

Other popular airlines flying from San Antonio to St. Louis are:
  • American offers 482 connecting flights per week. American flies from San Antonio International Airport (SAT) to St. Louis Lambert International Airport (STL) .
  • United offers 231 connecting flights per week. United flies from San Antonio International Airport (SAT) to St. Louis Lambert International Airport (STL) .
  • Delta offers 217 connecting flights per week. Delta flies from San Antonio International Airport (SAT) to St. Louis Lambert International Airport (STL) .
  • Frontier offers 20 connecting flights per week. Frontier flies from San Antonio International Airport (SAT) to St. Louis Lambert International Airport (STL) .
  • Alaska offers 14 connecting flights per week. Alaska flies from San Antonio International Airport (SAT) to St. Louis Lambert International Airport (STL) .
The number of connecting flights refers to distinct flights with at least one stop between San Antonio and St. Louis.
The cheapest round-trip flight from San Antonio to St. Louis recently found on Google Flights was with Frontier from $180. The cheapest one-way flight was with Frontier from $96.

Some of the cheapest round-trip deals we found with different airlines:
  • The cheapest Southwest flight from San Antonio to St. Louis is $385, flying from May 28 to Jun 1.
  • The cheapest American flight from San Antonio to St. Louis is $344, flying from Jun 4 to Jun 8.
  • The cheapest United flight from San Antonio to St. Louis is $311, flying from May 28 to Jun 1.
  • The cheapest Delta flight from San Antonio to St. Louis is $395, flying from Jun 4 to Jun 8.
  • The cheapest Frontier flight from San Antonio to St. Louis is $180, flying from May 29 to May 31.
  • The cheapest Alaska flight from San Antonio to St. Louis is $890, flying from Jun 4 to Jun 8.
Southwest flies direct from San Antonio to St. Louis.
  • There are 13 Southwest direct flights from San Antonio 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 San Antonio and St. Louis at price $232 is offered by Frontier from Sat, May 9 to Mon, May 11.
Southwest flies direct from San Antonio to St. Louis.
  • There are 13 Southwest direct flights from San Antonio 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 San Antonio to St. Louis on a daily basis.
The cheapest direct (nonstop) round-trip flights between San Antonio and St. Louis start at $385 from Thu, Jun 4 to Mon, Jun 8 with Southwest.
It's easy to find nonstop flights with Google Flights! Once you've searched for flights from San Antonio 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 San Antonio and St. Louis start at $478 from Fri, Jun 12 to Sun, Jun 14 with Frontier.
The cheapest economy class round-trip flights between San Antonio and St. Louis start at $180 from Fri, May 29 to Sun, May 31.
To book business class trips from San Antonio 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 San Antonio and St. Louis starts at $232 from Sat, May 9 to Mon, May 11 with Frontier.
The cheapest last-minute deal between San Antonio and St. Louis at price $232 is offered by Frontier from Sat, May 9 to Mon, May 11.
To find last-minute flight deals from San Antonio 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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