To St. Louis

Cheap Flights from San Antonio to St. Louis

Browse current best options from San Antonio. Become a member to unlock all deals and get alerts when new deals appear.

Deals from

San Antonio

RatePunk searches hundreds of travel sites at once for deals on flights to St. Louis

Prices updated 24 days ago

486,190 searches this week

171 airlines compared

80%+ AI score for best value

Fares are subject to change and may not be available for all dates. (Data last updated May 29, 2026.)

Today’s best flight deals from San Antonio to St. Louis

Explore current cheapest deals departing from San Antonio to St. Louis

Round trip

Sort by: Cheapest

August 6 - August 10

Cheapest

Best

SAT - St. Louis

$309

$244

Round trip

July 15 - July 18

SAT - St. Louis

$292

$251

Round trip

July 15 - July 22

SAT - St. Louis

$282

$254

Round trip

August 5 - August 10

SAT - St. Louis

$300

$259

Round trip

September 2 - September 10

SAT - St. Louis

$274

$259

Round trip

July 9 - July 11

SAT - St. Louis

$298

$263

Round trip

July 4 - July 6

Earliest

SAT - St. Louis

$305

$264

Round trip

August 1 - August 3

SAT - St. Louis

$310

$264

Round trip

July 15 - July 21

SAT - St. Louis

$282

$268

Round trip

August 11 - August 31

SAT - St. Louis

$256

$275

Round trip

Unlock all 500+ flight deals to St. Louis and get alerts when great deals appear

Route Intelligence — 486,190 Searches this Week

Insights for flights from San Antonio to St. Louis

A typical journey from San Antonio to St. Louis takes about 8h 44m, including connections. Since most itineraries on this route involve at least one stop, this duration reflects the overall travel time you can expect. This journey covers a distance of 1266 kilometers, classifying it as a short-haul route.

Right now, fares for cheap flights from San Antonio to St. Louis are above the typical level. Prices for this route typically range from $310–$414, with a median of $388. Only 6% of recent fares were classified as a good price, indicating that finding deals might require some flexibility. New deals appear almost daily, so monitoring prices can be beneficial.

When looking for the cheapest time to fly from San Antonio to St. Louis, March stands out with a median fare of just $164. Other more affordable months include January, with a median fare of $239, and December, where the median fare is $332. These months offer significantly lower prices compared to the overall median for the route.

For flights from San Antonio to St. Louis, most itineraries connect at least once, as 0% of recent fares were non-stop. When you do connect, the typical number of stopovers is 2. This means you should anticipate a journey that includes at least one intermediate stop between your origin and destination.

How much is a round trip from San Antonio to St. Louis

Regular price: $250 - $345

Prices from San Antonio to St. Louis are currently below the regular range.

The regular price range for flights from San Antonio to St. Louis is $250 to $345. The current lowest deal is $244 with Frontier Airlines for travel from August 6 to August 10.

now $244

Low $250

High $345

The cheapest time to fly from San Antonio to St. Louis

The cheapest month to fly from San Antonio to St. Louis is March, with a median price of $164. The most expensive month is October, with a median price of $414. Prices are generally lower from January to December.

March

Cheapest

Flights from $164

October

Most Expensive

Flights from $414

Jan

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Direct flights from San Antonio to St. Louis

Southwest Airlines

Last-minute flights going from San Antonio to St. Louis

Fri, Jun 19

⌛ Last-Minute

SAT - St. Louis

San Antonio (SAT) - St. Louis (STL)

Frontier Airlines

$588

$598

One-way

Sun, Jun 21

⌛ Last-Minute

SAT - St. Louis

San Antonio (SAT) - St. Louis (STL)

Frontier Airlines

$500

$539

One-way

Sat, Jun 27

⌛ Last-Minute

SAT - St. Louis

San Antonio (SAT) - St. Louis (STL)

$438

$595

One-way

Sun, Jun 28

⌛ Last-Minute

SAT - St. Louis

San Antonio (SAT) - St. Louis (STL)

$430

$461

One-way

Sun, Jun 28

⌛ Last-Minute

SAT - St. Louis

San Antonio (SAT) - St. Louis (STL)

$416

$461

One-way

Sun, Jun 28

⌛ Last-Minute

SAT - St. Louis

San Antonio (SAT) - St. Louis (STL)

$457

$483

One-way

Biggest price drops on these dates for flights from San Antonio to St. Louis

4 nights

Aug 6 - Aug 10

$309 → $244

21%

3 nights

Jun 30 - Jul 3

$472 → $417

12%

4 nights

Jun 30 - Jul 4

$471 → $417

12%

2 nights

Aug 1 - Aug 3

$310 → $264

15%

Popular Airports to fly from San Antonio to St. Louis

San Antonio - St. Louis route insights

💸 Price insights

Recent fares are above the typical level

Recent fares for San Antonio to St. Louis are above the typical level, with a median of $388.

📅 Best time to fly

March is historically cheapest at $164

Historically, March is the cheapest month to fly from San Antonio to St. Louis, with a median price of $164.

⏱️ Flight duration

Connecting flights average 8h 44m

The typical flight duration from San Antonio to St. Louis is 8 hours and 44 minutes with connecting flights.

✈️ Airlines & availability

Connecting flights are dominant

Connecting flights are dominant for this route, with a median of 2 stopovers.

🏆 Airline highlight

Frontier Airlines offers a deal at $244

A recent deal from Frontier Airlines for San Antonio to St. Louis was found at $244.

🎯 Booking tip

Deals are frequent for this route

Deals for flights from San Antonio to St. Louis are frequent, appearing over once per day.

San Antonio main airports to depart from

San Antonio International (SAT)

Cheapest

San Antonio International Airport is a convenient departure point for flights to St. Louis.

📍 ~15 km from city center (reachable by car)

💸 Flights from ~$244

St. Louis main airports to arrive at

St. Louis Lambert International (STL)

Cheapest

St. Louis Lambert International Airport is the primary airport for arrivals into St. Louis.

📍 ~20 km from St. Louis (reachable by car)

💸 Flights from ~$244

Airports nearby St. Louis used as alternative

MidAmerica St. Louis (BLV)

MidAmerica St. Louis (BLV) can be a useful alternative, especially for budget routes on the Illinois side.

📍 ~50 km from St. Louis (reachable by car)

💸 Flights from ~$364

Columbia Regional (COU)

Cheapest

Columbia Regional (COU) offers a full range of cabin classes and serves as a reliable regional hub.

📍 ~180 km from St. Louis (reachable by car)

💸 Flights from ~$298

Abraham Lincoln Capital (SPI)

Abraham Lincoln Capital (SPI) provides consistent regional service with Business class availability.

📍 ~150 km from St. Louis (reachable by car)

💸 Flights from ~$320

General Wayne A. Downing Peoria International (PIA)

General Wayne A. Downing Peoria International (PIA) is a larger regional airport with multiple cabin classes.

📍 ~230 km from St. Louis (reachable by car)

💸 Flights from ~$318

Central Illinois Regional (BMI)

Central Illinois Regional (BMI) is an alternative for travelers willing to drive into Central Illinois.

📍 ~210 km from St. Louis (reachable by car)

💸 Flights from ~$309

Business & First Class Flight Deals to St. Louis

St. Louis, United States

38% AI deal score

$2,092

Frequently Asked Questions About Flights to St. Louis

To find more affordable flights, consider being flexible with your travel dates and times. Comparing prices across different airlines and booking sites can often reveal better deals. Looking into flights with layovers might also present lower-cost options.

Booking flights in advance, often several weeks or months before your intended travel date, can sometimes lead to better prices. However, prices can fluctuate, so monitoring fares is usually a good strategy. There isn't a single best time for all bookings.

Comparing nearby airports can sometimes offer more flight options or different price points. While it may add to your ground travel, the potential savings on airfare could make it worthwhile. Always consider the total cost and convenience.

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