Are direct flights from San Antonio to St. Louis always the best option?

Direct flights offer convenience and save travel time, but they are not always the most economical choice. Flights with one or more layovers can sometimes be significantly cheaper. Weigh the trade-off between travel time and cost to decide what works best for your trip.

Can flexible travel dates help on San Antonio to St. Louis flights?

Yes, being flexible with your travel dates can often lead to finding more affordable flights. Prices can vary significantly depending on the day of the week or time of year. Adjusting your departure or return by a few days may unlock better deals.

What extra costs should I check before booking San Antonio to St. Louis flights?

Before booking, always check for potential extra costs such as baggage fees, seat selection charges, and in-flight services. Some airlines may also charge for printing boarding passes at the airport. Factor these into your total travel budget to avoid surprises.

Flights From San Antonio

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 7 days ago

483 airlines compared

80%+ AI score for best value

Fares are subject to change and may not be available for all dates. (Data last updated Oct 26, 2026.)

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

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

2026-11-17 – 2026-11-19
SAT - St. Louis
76% AI deal score
$349
$206
Round trip
2026-11-18 – 2026-12-02
SAT - St. Louis
73% AI deal score
$292
$206
Round trip
2026-11-18 – 2026-12-11
SAT - St. Louis
71% AI deal score
$280
$210
Round trip
2026-11-18 – 2026-12-04
SAT - St. Louis
71% AI deal score
$286
$220
Round trip
2026-11-18 – 2026-11-20
SAT - St. Louis
74% AI deal score
$347
$221
Round trip
2026-11-18 – 2026-12-14
SAT - St. Louis
66% AI deal score
$280
$221
Round trip
2026-11-18 – 2026-12-09
SAT - St. Louis
66% AI deal score
$280
$221
Round trip
2026-11-17 – 2026-12-11
SAT - St. Louis
66% AI deal score
$280
$221
Round trip
2026-12-08 – 2026-12-11
SAT - St. Louis
71% AI deal score
$303
$225
Round trip
2026-11-18 – 2026-12-07
SAT - St. Louis
65% AI deal score
$280
$228
Round trip

San Antonio to St. Louis: Overview

Insights for flights from San Antonio to St. Louis

A typical journey from San Antonio to St. Louis takes about 20h 45m, including connections. Given that most itineraries for this route involve at least one stop, this duration reflects the common travel experience for this short-haul distance.

For travelers seeking cheap flights from San Antonio to St. Louis, fares typically range from $387–$1091, with a median of $472. Right now, current fares are significantly above the typical level for this route. Only 5% of recent fares were classified as a good price, indicating that finding lower prices can be challenging. New deals for this route are infrequent, so setting a price alert could be beneficial.

The cheapest months to fly from San Antonio to St. Louis are February, with a median fare of $338, and both December and January, each with a median fare of $382. These months offer more favorable pricing compared to the overall median for the route.

Most itineraries for flights from San Antonio to St. Louis connect at least once, with only 0.3% of recent fares being non-stop. When connections are involved, the typical number of stopovers is 2, which contributes to the overall journey time.

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

Regular price: $230 - $349

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

The regular price range for this route is typically between $230 and $349. The current lowest deal is $193 with Frontier Airlines, for travel from November 18 to December 7.

now $193

Low $230

High $349

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

Flights from San Antonio to St. Louis are cheapest in February, with a median price of $338. The most expensive month to fly is October, with a median price of $993. Prices are generally lower from January to December.

February

Cheapest

Flights from $338

October

Most Expensive

Flights from $993

Jan

Feb

Aug

Sep

Oct

Nov

Dec

Direct flights from San Antonio to St. Louis

Frontier Airlines

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

Sun, Nov 8

⌛ Last-Minute

SAT - St. Louis

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

Frontier Airlines

$400

$340

One-way

Tue, Nov 10

⌛ Last-Minute

SAT - St. Louis

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

Frontier Airlines

$374

$250

One-way

Tue, Nov 10

⌛ Last-Minute

SAT - St. Louis

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

WestJet, Air Canada

$319

$1,079

One-way

Tue, Nov 10

⌛ Last-Minute

SAT - St. Louis

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

WestJet, Air Canada

$287

$1,479

One-way

Tue, Nov 10

⌛ Last-Minute

SAT - St. Louis

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

WestJet, Air Canada

$287

$1,481

One-way

Wed, Nov 11

⌛ Last-Minute

SAT - St. Louis

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

WestJet, Air Canada

$317

$740

One-way

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

2 nights

Nov 17 - Nov 19

$351 → $193

45%

2 nights

Nov 18 - Nov 20

$349 → $220

37%

3 nights

Nov 17 - Nov 20

$349 → $220

37%

14 nights

Nov 18 - Dec 2

$292 → $193

34%

Popular Airports to fly from San Antonio to St. Louis

San Antonio - St. Louis route insights

💸 Price insights

Current fares are above the typical level.

Recent fares for San Antonio to St. Louis are above the typical level at $193.

📅 Best time to fly

February is historically the cheapest month to fly.

Historically, February is the cheapest month to fly, with a median price of $338.

⏱️ Flight duration

Connecting flights typically take 20h 45m.

Connecting flights from San Antonio to St. Louis typically take 20h 45m.

✈️ Airlines & availability

Connecting flights are dominant on this route.

Connecting flights are dominant, making up 70% of recent deals.

🏆 Airline highlight

Frontier Airlines has 47 direct deals.

Frontier Airlines offers 47 direct deals for flights from San Antonio to St. Louis.

🎯 Booking tip

Deals are rare on this route.

Deals on flights from San Antonio to St. Louis are rare.

San Antonio main airports to depart from

San Antonio International (SAT)

Cheapest

San Antonio International is a convenient option for flights from San Antonio to St. Louis.

📍 ~12 km from city center (reachable by car)

💸 Flights from ~$275

St. Louis main airports to arrive at

St. Louis Lambert International (STL)

Cheapest

St. Louis Lambert International is the primary airport for flights arriving in St. Louis.

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

💸 Flights from ~$226

Airports nearby St. Louis used as alternative

MidAmerica St. Louis (BLV)

MidAmerica St. Louis (BLV) is the closest alternative airport to the St. Louis metropolitan area.

📍 ~45 km from St. Louis (reachable by car)

💸 Flights from ~$415

Business & First Class Flight Deals to St. Louis

Discover luxury on the budget with premium cabin class on flights from San Antonio to St. Louis.

Elite

Best Elite deals to St. Louis

Exclusive daily First Class, Business Class, and Premium Economy flight deals, refreshed every 24 hours.

From SAT

Elite

Dec 07

St. Louis, United States

49% AI deal score

$2,985

$2,770

Save $215

Aeroméxico, +1

Business Class

From SAT

Elite

Dec 01

St. Louis, United States

48% AI deal score

$2,992

$2,848

Save $144

Aeroméxico, +1

Business Class

From SAT

Elite

Dec 02

St. Louis, United States

48% AI deal score

$2,913

$2,848

Save $65

Aeroméxico, +1

Business Class

From SAT

Elite

Dec 01

St. Louis, United States

47% AI deal score

$2,848

Aeroméxico, +1

Business Class

From SAT

Elite

Mar 18

St. Louis, United States

43% AI deal score

$3,339

Aeroméxico, +1

Business Class

From SAT

Elite

Apr 06

St. Louis, United States

43% AI deal score

$3,350

Aeroméxico, +1

Business Class

From SAT

Elite

Mar 26

St. Louis, United States

43% AI deal score

$3,350

Aeroméxico, +1

Business Class

From SAT

Elite

Mar 26

St. Louis, United States

43% AI deal score

$3,369

Aeroméxico, +1

Business Class

From SAT

Elite

Nov 26

St. Louis, United States

43% AI deal score

$3,379

Aeroméxico, +1

Business Class

From SAT

Elite

Apr 05

St. Louis, United States

43% AI deal score

$3,388

Aeroméxico, +1

Business Class

From SAT

Elite

Apr 06

St. Louis, United States

43% AI deal score

$3,429

Aeroméxico, +1

Business Class

From SAT

Elite

Mar 26

St. Louis, United States

43% AI deal score

$3,429

Aeroméxico, +1

Business Class

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 also help you identify better deals. Looking into flights with layovers may sometimes offer lower fares than direct routes.

Booking flights in advance, often several weeks or months before your intended departure, can sometimes result in better prices. However, prices can fluctuate, so monitoring fares over time may help you find a suitable booking window. Mid-week travel might also offer more competitive rates.

Comparing nearby airports can sometimes uncover additional flight options or potentially lower fares. While it may require extra travel time to and from these alternative airports, the savings could be worthwhile. Always factor in ground transportation costs and convenience when considering this option.

Related routes

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Flights to St. Louis from other cities

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San Antonio to St. Louis: Overview

Insights for flights from San Antonio to St. Louis

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

Regular price: $230 - $349

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

The regular price range for this route is typically between $230 and $349. The current lowest deal is $193 with Frontier Airlines, for travel from November 18 to December 7.

now $193

Low $230

High $349

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

February

Cheapest

Flights from $338

October

Most Expensive

Flights from $993

Jan

Feb

Aug

Sep

Oct

Nov

Dec

Direct flights from San Antonio to St. Louis

Frontier Airlines

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

Sun, Nov 8

⌛ Last-Minute

SAT - St. Louis

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

Frontier Airlines

$400

$340

One-way

Tue, Nov 10

⌛ Last-Minute

SAT - St. Louis

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

Frontier Airlines

$374

$250

One-way

Tue, Nov 10

⌛ Last-Minute

SAT - St. Louis

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

WestJet, Air Canada

$319

$1,079

One-way

Tue, Nov 10

⌛ Last-Minute

SAT - St. Louis

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

WestJet, Air Canada

$287

$1,479

One-way

Tue, Nov 10

⌛ Last-Minute

SAT - St. Louis

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

WestJet, Air Canada

$287

$1,481

One-way

Wed, Nov 11

⌛ Last-Minute

SAT - St. Louis

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

WestJet, Air Canada

$317

$740

One-way

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

2 nights

Nov 17 - Nov 19

$351 → $193

45%

2 nights

Nov 18 - Nov 20

$349 → $220

37%

3 nights

Nov 17 - Nov 20

$349 → $220

37%

14 nights

Nov 18 - Dec 2

$292 → $193

34%

Popular Airports to fly from San Antonio to St. Louis

San Antonio - St. Louis route insights

💸 Price insights

Current fares are above the typical level.

Recent fares for San Antonio to St. Louis are above the typical level at $193.

📅 Best time to fly

February is historically the cheapest month to fly.

Historically, February is the cheapest month to fly, with a median price of $338.

⏱️ Flight duration

Connecting flights typically take 20h 45m.

Connecting flights from San Antonio to St. Louis typically take 20h 45m.

✈️ Airlines & availability

Connecting flights are dominant on this route.

Connecting flights are dominant, making up 70% of recent deals.

🏆 Airline highlight

Frontier Airlines has 47 direct deals.

Frontier Airlines offers 47 direct deals for flights from San Antonio to St. Louis.

🎯 Booking tip

Deals are rare on this route.

Deals on flights from San Antonio to St. Louis are rare.

San Antonio main airports to depart from

San Antonio International (SAT)

Cheapest

San Antonio International is a convenient option for flights from San Antonio to St. Louis.

📍 ~12 km from city center (reachable by car)

💸 Flights from ~$275

St. Louis main airports to arrive at

St. Louis Lambert International (STL)

Cheapest

St. Louis Lambert International is the primary airport for flights arriving in St. Louis.

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

💸 Flights from ~$226

Airports nearby St. Louis used as alternative

MidAmerica St. Louis (BLV)

MidAmerica St. Louis (BLV) is the closest alternative airport to the St. Louis metropolitan area.

📍 ~45 km from St. Louis (reachable by car)

💸 Flights from ~$415

Business & First Class Flight Deals to St. Louis

Discover luxury on the budget with premium cabin class on flights from San Antonio to St. Louis.

Elite

Best Elite deals to St. Louis

Exclusive daily First Class, Business Class, and Premium Economy flight deals, refreshed every 24 hours.

From SAT

Elite

Dec 07

St. Louis, United States

49% AI deal score

$2,985

$2,770

Save $215

Aeroméxico, +1

Business Class

From SAT

Elite

Dec 01

St. Louis, United States

48% AI deal score

$2,992

$2,848

Save $144

Aeroméxico, +1

Business Class

From SAT

Elite

Dec 02

St. Louis, United States

48% AI deal score

$2,913

$2,848

Save $65

Aeroméxico, +1

Business Class

From SAT

Elite

Dec 01

St. Louis, United States

47% AI deal score

$2,848

Aeroméxico, +1

Business Class

From SAT

Elite

Mar 18

St. Louis, United States

43% AI deal score

$3,339

Aeroméxico, +1

Business Class

From SAT

Elite

Apr 06

St. Louis, United States

43% AI deal score

$3,350

Aeroméxico, +1

Business Class

From SAT

Elite

Mar 26

St. Louis, United States

43% AI deal score

$3,350

Aeroméxico, +1

Business Class

From SAT

Elite

Mar 26

St. Louis, United States

43% AI deal score

$3,369

Aeroméxico, +1

Business Class

From SAT

Elite

Nov 26

St. Louis, United States

43% AI deal score

$3,379

Aeroméxico, +1

Business Class

From SAT

Elite

Apr 05

St. Louis, United States

43% AI deal score

$3,388

Aeroméxico, +1

Business Class

From SAT

Elite

Apr 06

St. Louis, United States

43% AI deal score

$3,429

Aeroméxico, +1

Business Class

From SAT

Elite

Mar 26

St. Louis, United States

43% AI deal score

$3,429

Aeroméxico, +1

Business Class

Frequently Asked Questions About Flights to St. Louis

Cheap Flights from San Antonio to St. Louis

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

San Antonio to St. Louis: Overview

Insights for flights from San Antonio to St. Louis

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

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

Direct flights from San Antonio to St. Louis

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

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

Popular Airports to fly from San Antonio to St. Louis

San Antonio - St. Louis route insights

Current fares are above the typical level.

February is historically the cheapest month to fly.

Connecting flights typically take 20h 45m.

Connecting flights are dominant on this route.

Frontier Airlines has 47 direct deals.

Deals are rare on this route.

San Antonio main airports to depart from

St. Louis main airports to arrive at

Airports nearby St. Louis used as alternative

Business & First Class Flight Deals to St. Louis

Best Elite deals to St. Louis

Dec 07

Dec 01

Dec 02

Dec 01

Mar 18

Apr 06

Mar 26

Mar 26

Nov 26

Apr 05

Apr 06

Mar 26

Frequently Asked Questions About Flights to St. Louis

How can I find cheap flights from San Antonio to St. Louis?

When should I book flights from San Antonio to St. Louis?

Should I compare nearby airports for flights from San Antonio to St. Louis?

Are direct flights from San Antonio to St. Louis always the best option?

Can flexible travel dates help on San Antonio to St. Louis flights?

What extra costs should I check before booking San Antonio to St. Louis flights?

Related routes

More routes from San Antonio

Flights to St. Louis from other cities

San Antonio to St. Louis: Overview

Insights for flights from San Antonio to St. Louis

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

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

Direct flights from San Antonio to St. Louis

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

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

Popular Airports to fly from San Antonio to St. Louis

San Antonio - St. Louis route insights

Current fares are above the typical level.

February is historically the cheapest month to fly.

Connecting flights typically take 20h 45m.

Connecting flights are dominant on this route.

Frontier Airlines has 47 direct deals.

Deals are rare on this route.

San Antonio main airports to depart from

St. Louis main airports to arrive at

Airports nearby St. Louis used as alternative

Business & First Class Flight Deals to St. Louis

Best Elite deals to St. Louis

Dec 07

Dec 01

Dec 02

Dec 01

Mar 18

Apr 06

Mar 26

Mar 26

Nov 26

Apr 05

Apr 06

Mar 26

Frequently Asked Questions About Flights to St. Louis

How can I find cheap flights from San Antonio to St. Louis?

When should I book flights from San Antonio to St. Louis?

Should I compare nearby airports for flights from San Antonio to St. Louis?