To St. Louis

Cheap Flights from Austin to St. Louis

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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 Austin to St. Louis

Explore current cheapest deals departing from Austin to St. Louis

Round trip

Sort by: Cheapest

August 4 - August 9

Cheapest

Best

AUS - St. Louis

$292

$194

Round trip

July 14 - August 9

Cheapest

Earliest

AUS - St. Louis

$232

$194

Round trip

August 4 - August 30

Cheapest

AUS - St. Louis

$240

$194

Round trip

August 4 - August 24

Cheapest

AUS - St. Louis

$242

$194

Round trip

August 4 - August 23

Cheapest

AUS - St. Louis

$243

$194

Round trip

August 4 - August 31

Cheapest

AUS - St. Louis

$240

$194

Round trip

July 14 - August 11

Earliest

AUS - St. Louis

$232

$199

Round trip

July 21 - August 9

AUS - St. Louis

$231

$199

Round trip

August 4 - August 11

AUS - St. Louis

$282

$199

Round trip

August 7 - August 10

Best

AUS - St. Louis

$303

$200

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 Austin to St. Louis

Most itineraries for flights from Austin to St. Louis connect at least once. Right now, 0% of recent fares are non-stop, meaning you should expect to make connections. When connecting, the typical number of stopovers is 2.

A typical journey from Austin to St. Louis takes about 9h 14m including connections. This duration reflects the overall travel time, accounting for the connections common on this route. The total distance covered on this route is 1162 kilometers, classifying it as a short-haul flight.

When is the cheapest time to fly from Austin to St. Louis? The data indicates that December is the cheapest month to fly, with a median fare of $135. Following closely are February, with a median fare of $139, and January, with a median fare of $140. These months offer the most competitive pricing for this route.

Fares for cheap flights from Austin to St. Louis typically range from $283–$349, with a median of $311. Right now, fares are below the typical level, and 8% of recent fares were classified as a good price. New deals appear almost daily, suggesting frequent opportunities to find competitive prices.

How much is a round trip from Austin to St. Louis

Regular price: $198 - $342

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

The regular price range for flights from Austin to St. Louis is typically between $198 and $342. The current lowest deal is $194 with Frontier Airlines, for travel from July 14 to August 9.

now $194

Low $198

High $342

The cheapest time to fly from Austin to St. Louis

The cheapest month to fly from Austin to St. Louis is December, with a median price of $135. The most expensive month is June, with a median price of $693. Prices are generally lower from January to December.

December

Cheapest

Flights from $135

June

Most Expensive

Flights from $693

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Direct flights from Austin to St. Louis

Southwest Airlines

Last-minute flights going from Austin to St. Louis

Thu, Jul 2

⌛ Last-Minute

AUS - St. Louis

Austin (AUS) - St. Louis (STL)

Southwest Airlines

$277

$278

One-way

Thu, Jul 2

⌛ Last-Minute

AUS - St. Louis

Austin (AUS) - St. Louis (STL)

United Airlines

$273

$289

One-way

Fri, Jul 3

⌛ Last-Minute

AUS - St. Louis

Austin (AUS) - St. Louis (STL)

Frontier Airlines

$282

$258

One-way

Sat, Jul 4

⌛ Last-Minute

AUS - St. Louis

Austin (AUS) - St. Louis (STL)

Frontier Airlines

$281

$261

One-way

Mon, Jul 6

⌛ Last-Minute

AUS - St. Louis

Austin (AUS) - St. Louis (STL)

American Airlines

$275

$259

One-way

Mon, Jul 6

⌛ Last-Minute

AUS - St. Louis

Austin (AUS) - St. Louis (STL)

Southwest Airlines

$275

$259

One-way

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

3 nights

Aug 7 - Aug 10

$303 → $200

34%

4 nights

Aug 23 - Aug 27

$300 → $201

33%

5 nights

Aug 4 - Aug 9

$292 → $194

34%

7 nights

Aug 23 - Aug 30

$289 → $201

31%

Popular Airports to fly from Austin to St. Louis

Austin - St. Louis route insights

💸 Price insights

Recent fares are below the typical level.

Recent fares from Austin to St. Louis are below the typical level at $194.

📅 Best time to fly

December is historically the cheapest month to fly.

Historically, December is the cheapest month to fly from Austin to St. Louis, with a median price of $135.

⏱️ Flight duration

Connecting flights take 9h 14m on average.

Flights from Austin to St. Louis typically involve connections, with an average total travel time of 9h 14m.

✈️ Airlines & availability

Connecting flights are dominant on this route.

This route primarily features connecting flights, with 0% direct options available for travelers.

🏆 Airline highlight

Southwest Airlines offers direct flights.

Southwest Airlines is an option for direct flights from Austin to St. Louis.

🎯 Booking tip

Deals appear frequently for this route.

Deals for flights from Austin to St. Louis are frequent, appearing 0.67 times per day.

Austin main airports to depart from

Austin–Bergstrom International (AUS)

Cheapest

Austin–Bergstrom International Airport is a great choice for flights from Austin to St. Louis.

📍 ~10 km from city center (reachable by car)

💸 Flights from ~$194

St. Louis main airports to arrive at

St. Louis Lambert International (STL)

Cheapest

St. Louis Lambert International Airport is a key arrival point for flights to St. Louis.

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

💸 Flights from ~$194

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 of the metro area.

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

💸 Flights from ~$289

Columbia Regional (COU)

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

📍 ~170 km from St. Louis (reachable by car)

💸 Flights from ~$298

Abraham Lincoln Capital (SPI)

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

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

💸 Flights from ~$329

General Wayne A. Downing Peoria International (PIA)

Cheapest

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 ~$257

Central Illinois Regional (BMI)

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

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

💸 Flights from ~$308

Business & First Class Flight Deals to St. Louis

St. Louis, United States

37% AI deal score

$11,571

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 various airlines and booking sites can often reveal better deals. Looking into flights with layovers may also present lower fares than direct options.

Booking in advance, often several weeks or months before your intended travel date, can sometimes result in more favorable prices. However, prices can fluctuate, so monitoring fares over time may help you identify a good booking window. Weekday travel might also offer better rates.

Comparing nearby airports at both your origin and destination can sometimes uncover additional flight options or lower prices. While it may add to your ground travel time, the potential savings on airfare can make it a worthwhile consideration. Always factor in the total cost and convenience.

Related routes

Consider alternative routes from Austin

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Cheap Flights from Austin to St. Louis

Today’s best flight deals from Austin to St. Louis

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 Austin to St. Louis

How much is a round trip from Austin to St. Louis

The cheapest time to fly from Austin to St. Louis

Direct flights from Austin to St. Louis

Last-minute flights going from Austin to St. Louis

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

Popular Airports to fly from Austin to St. Louis

Austin - St. Louis route insights

Recent fares are below the typical level.

December is historically the cheapest month to fly.

Connecting flights take 9h 14m on average.

Connecting flights are dominant on this route.

Southwest Airlines offers direct flights.

Deals appear frequently for this route.

Austin 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

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Frequently Asked Questions About Flights to St. Louis

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

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

When should I book flights from Austin to St. Louis?

When should I book flights from Austin to St. Louis?