How popular is this Austin to St. Louis flight route?

This flight path from Austin Bergstrom to Lambert-St Louis was viewed by 12 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

What are the cheapest airlines flying from Austin to St. Louis round-trip?

Our cheapest airline available from Austin to St. Louis is Southwest. Our recent data shows that you can find tickets from as low as $157 on this airline. Additional options worth looking into are American Airlines and Delta, starting at $177 and $187 round-trip. You may be able to fly from Austin to St. Louis for 52% less than the average price by searching for these airlines.

What are the cheapest airlines to fly from Austin to St. Louis one-way?

$79 is the cheapest one-way deal found within the past few days, from Southwest. You may also be able to find cheap deals on American Airlines and Spirit Airlines, with prices starting from $87 and $88, respectively.

What is the cheapest day to fly from Austin to St. Louis?

Travelers seeking maximum savings on their Austin to St. Louis flight should consider departing on Friday evenings when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

In terms of precipitation, rainfall in St. Louis ranges from 2.2 - 4.7 inches per month. May is typically the wettest month, when rainfall can reach 4.7 in. February is typically the driest time to visit St. Louis when rainfall is around 2.2 in.

If weather is an important factor for your trip to St. Louis, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

What are the cheapest flights from Austin to St. Louis?

While on average a flight from Austin to St. Louis is generally $293, our data shows the cheapest flight currently is $89. When looking at the most popular route, (Austin Bergstrom - Lambert-St Louis), you can expect to pay $169 for that flight.

What are the most popular airlines that fly from Austin to St. Louis?

Consider American Airlines, Delta or Frontier when booking your flight. These represent the most popular airlines when flying from Austin to St. Louis.

What is the cheapest day to fly round-trip from Austin to St. Louis?

Users have found that flying from Austin to St. Louis on a Saturday typically leans towards higher prices. However, this doesn’t mean you still can’t find a deal. Flexibility with other aspects of your flight can still land a great price for your trip.

How far in advance should I book a flight from Austin to St. Louis?

To save up to 141% on this flight, we recommend booking at least 52 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from Austin to St. Louis from $403 1-2 weeks out and tickets from $541 for flights departing within the next 72 hours.

What is the cheapest month to fly from Austin to St. Louis?

April can be a great time to fly to St. Louis from Austin with a flight ticket averaging about $331. Cheapflights users have found deals in the month of April for as cheap as $196. The most expensive prices can be found in the month of March.

What airports do I use to fly from Austin to St. Louis?

If you book a flight from Austin to St. Louis, you will be flying from Austin Bergstrom to Lambert-St Louis. Flights to Lambert-St Louis (STL) from Austin Bergstrom (AUS) take 2h 00m for a nonstop flight. There are 2 flights from Austin Bergstrom to St. Louis per day from 4 airlines.

Can I find deals for flights from Austin to St. Louis that include hotel bookings?

Yes. In addition to deals on Austin to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.

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

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Austin to St. Louis.

Can I find deals for business class flights from Austin to St. Louis?

Yes. Cheapflights offers flight deals from Austin to St. Louis by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$79+ Flights from Austin to St. Louis

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Cheapflights Tip: The best prices from Austin Bergstrom to Lambert-St Louis are usually found in April or August, booked 51 days in advance, depart on a Tuesday or Wednesday and return on a Tuesday

Cheap flight deals from Austin to St. Louis

Round-trip from	$157 (Southwest)
One-way from	$79 (Southwest)
Popular in	March
Cheapest in	April
Average price	$363
Good round-trip deal	$251 or less
Good one-way deal	$205 or less

From Austin Bergstrom to Lambert-St Louis

Search Deals

One-way flight from Austin Bergstrom to Lambert-St Louis

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Highest demand for flights based on searches. 4% potential increase in price ($17 potential increase over avg. RT price).

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Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).

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Average for round-trip flights in July 2025

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Price to beat on a round-trip flight from Austin Bergstrom to Lambert-St Louis.

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Price to beat on a one-way flight from Austin Bergstrom to Lambert-St Louis.

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Find flight deals from Austin to St. Louis

Cheapest flights from Austin to St. Louis
Explore the most affordable flight options available from Austin to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.

Thu 8/2812:45 pmAUS - STL

Nonstop2h 10mSouthwest

Thu 9/410:05 amSTL - AUS

Nonstop2h 00mSouthwest

Deal found 7/29

$157

Tue 10/145:00 amAUS - STL

1 stop3h 53mAmerican Airlines

Sat 10/188:49 amSTL - AUS

1 stop5h 37mAmerican Airlines

Deal found 7/27

$177

Wed 9/1710:45 amAUS - STL

1 stop5h 20mDelta

Wed 9/2411:04 amSTL - AUS

1 stop4h 51mDelta

Deal found 7/29

$187

Tue 7/297:00 amAUS - STL

1 stop26h 11mFrontier

Wed 7/307:29 pmSTL - AUS

1 stop28h 15mFrontier

Deal found 7/27

$205

Mon 9/89:23 pmAUS - STL

1 stop11h 43mMultiple Airlines

Thu 9/1110:35 amSTL - AUS

1 stop12h 27mMultiple Airlines

Deal found 7/27

$212

Wed 10/223:51 pmAUS - STL

1 stop6h 44mUnited Airlines

Tue 10/281:35 pmSTL - AUS

1 stop7h 10mUnited Airlines

Deal found 7/28

$257

Best flights from Austin to St. Louis
Discover carefully curated flight deals from Austin to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 29, 2025.

Thu 8/2812:45 pmAUS - STL

Nonstop2h 10mSouthwest

Thu 9/410:05 amSTL - AUS

Nonstop2h 00mSouthwest

Deal found 7/29

$157

Tue 10/145:00 amAUS - STL

1 stop3h 53mAmerican Airlines

Sat 10/188:49 amSTL - AUS

1 stop5h 37mAmerican Airlines

Deal found 7/27

$177

Wed 9/1710:45 amAUS - STL

1 stop5h 20mDelta

Wed 9/2411:04 amSTL - AUS

1 stop4h 51mDelta

Deal found 7/29

$187

Sat 8/237:44 amAUS - STL

1 stop25h 27mFrontier

Sun 8/246:47 pmSTL - AUS

1 stop18h 22mFrontier

Deal found 7/28

$208

Mon 9/89:23 pmAUS - STL

1 stop11h 43mMultiple Airlines

Thu 9/1110:35 amSTL - AUS

1 stop12h 27mMultiple Airlines

Deal found 7/27

$212

Wed 10/223:51 pmAUS - STL

1 stop6h 44mUnited Airlines

Tue 10/281:35 pmSTL - AUS

1 stop7h 10mUnited Airlines

Deal found 7/28

$257

Last-minute flights from Austin to St. Louis
Discover last-minute flight deals from Austin to St. Louis. Data last updated July 29, 2025 and is based on user searches.

Tue 7/297:00 amAUS - STL

1 stop26h 11mFrontier

Wed 7/307:29 pmSTL - AUS

1 stop28h 15mFrontier

Deal found 7/27

$205

Mon 8/41:28 pmAUS - STL

1 stop8h 06mDelta

Thu 8/76:30 amSTL - AUS

1 stop6h 14mDelta

Deal found 7/28

$431

Tue 8/57:00 amAUS - STL

1 stop26h 11mFrontier

Thu 8/72:27 pmSTL - AUS

1 stop22h 37mFrontier

Deal found 7/26

$215

Wed 8/68:53 amAUS - STL

1 stop8h 03mAmerican Airlines

Sun 8/105:15 amSTL - AUS

1 stop6h 14mAmerican Airlines

Deal found 7/27

$353

Wed 8/63:45 pmAUS - STL

Nonstop2h 10mSouthwest

Sun 8/1010:05 pmSTL - AUS

Nonstop2h 00mSouthwest

Deal found 7/27

$398

Thu 8/76:00 amAUS - STL

1 stop27h 11mMultiple Airlines

Sat 8/910:45 amSTL - AUS

1 stop8h 47mMultiple Airlines

Deal found 7/27

$302

Thu 8/77:30 amAUS - STL

3 stops26h 22mSpirit Airlines

Sat 8/910:45 amSTL - AUS

1 stop8h 47mSpirit Airlines

Deal found 7/27

$422

Fri 8/86:00 pmAUS - STL

1 stop5h 59mUnited Airlines

Tue 8/125:00 amSTL - AUS

2 stops10h 22mUnited Airlines

Deal found 7/28

$454

Tue 8/266:40 amAUS - STL

1 stop5h 51mDelta

Tue 9/25:11 pmSTL - AUS

1 stop7h 07mDelta

Deal found 7/28

$187

Tue 8/263:34 pmAUS - STL

1 stop4h 48mAmerican Airlines

Thu 8/285:15 amSTL - AUS

1 stop4h 13mAmerican Airlines

Deal found 7/29

$189

Tue 8/265:30 amAUS - STL

2 stops9h 03mUnited Airlines

Tue 9/26:15 amSTL - AUS

1 stop4h 43mUnited Airlines

Deal found 7/28

$262

Thu 8/2812:45 pmAUS - STL

Nonstop2h 10mSouthwest

Thu 9/410:05 amSTL - AUS

Nonstop2h 00mSouthwest

Deal found 7/29

$157

One-way flights from Austin to St. Louis
Search for one-way flight options from Austin to St. Louis. Find affordable one-way fares based on user searches. Data last updated July 29, 2025.

Tue 10/286:00 amAUS - STL

Nonstop2h 05mSouthwest

Deal found 7/28

$79

Tue 10/2811:00 amAUS - STL

1 stop5h 03mAmerican Airlines

Deal found 7/27

$87

Sat 10/256:00 amAUS - STL

1 stop11h 55mSpirit Airlines

Deal found 7/28

$88

Mon 8/2511:47 amAUS - STL

1 stop7h 20mDelta

Deal found 7/29

$99

Tue 8/127:00 amAUS - STL

1 stop26h 11mFrontier

Deal found 7/27

$107

Sat 9/65:30 amAUS - STL

2 stops8h 49mUnited Airlines

Deal found 7/27

$124

Fly from

Fly to

Route

Depart

Return

Price

AustinSt. Louis

AUS - STL

AUSSTL

Austin Bergstrom

Thu 8/28

12:45 pm-2:55 pm

Nonstop2h 10m

Lambert-St Louis

Thu 9/4

10:05 am-12:05 pm

Nonstop2h 00m

$157

AustinSt. Louis

AUS - STL

AUSSTL

Austin Bergstrom

Tue 10/14

5:00 am-8:53 am

1 stop3h 53m

Lambert-St Louis

Sat 10/18

8:49 am-2:26 pm

1 stop5h 37m

$177

AustinSt. Louis

AUS - STL

AUSSTL

Austin Bergstrom

Wed 9/17

10:45 am-4:05 pm

1 stop5h 20m

Lambert-St Louis

Wed 9/24

11:04 am-3:55 pm

1 stop4h 51m

$187

AustinSt. Louis

AUS - STL

AUSSTL

Austin Bergstrom

Sat 8/23

7:44 am-9:11 am

1 stop25h 27m

Lambert-St Louis

Sun 8/24

6:47 pm-1:09 pm

1 stop18h 22m

$208

AustinSt. Louis

AUS - STL

AUSSTL

Austin Bergstrom

Mon 9/8

9:23 pm-9:06 am

1 stop11h 43m

Lambert-St Louis

Thu 9/11

10:35 am-11:02 pm

1 stop12h 27m

$212

AustinSt. Louis

AUS - STL

AUSSTL

Austin Bergstrom

Wed 10/22

3:51 pm-10:35 pm

1 stop6h 44m

Lambert-St Louis

Tue 10/28

1:35 pm-8:45 pm

1 stop7h 10m

$257

AustinSt. Louis

AUS - STL

AUSSTL

Austin Bergstrom

Tue 10/28

6:00 am-8:05 am

Nonstop2h 05m

$79

AustinSt. Louis

AUS - STL

AUSSTL

Austin Bergstrom

Tue 10/28

11:00 am-4:03 pm

1 stop5h 03m

$87

AustinSt. Louis

AUS - STL

AUSSTL

Austin Bergstrom

Sat 10/25

6:00 am-5:55 pm

1 stop11h 55m

$88

AustinSt. Louis

AUS - STL

AUSSTL

Austin Bergstrom

Mon 8/25

11:47 am-7:07 pm

1 stop7h 20m

$99

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

Showing 1-10 of 12 results

Best time to book a flight from Austin to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Austin with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Austin to St. Louis

How far ahead should I book a flight from Austin to St. Louis?

The price you pay for your flight from Austin to St. Louis may vary depending on when you book. For the best chance of a lower fare, look to book 51 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Austin to St. Louis?

Currently, August is the cheapest month in which you can book a flight from Austin to St. Louis (average of $311). Flying from Austin to St. Louis in March is currently the most expensive (average of $356). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from AUS to STL?

One of the essential ways to save on airfare from Austin to St. Louis is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the evening could potentially save you up to 40% on airfare.

Reviews of airlines servicing St. Louis

Read through reviews of airlines operating flights from Austin to St. Louis, such as Southwest, Delta, and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Southwest

8.0

Very good

4,238 reviews

Reviews

1 / 20

8.0

Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

Southwest

8.0

Very good

4,238 reviews

Southwest

8.0

Very good

4,238 reviews

Reviews

1 / 20

8.0

Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

Delta

8.0

Very good

7,977 reviews

Southwest

8.0

Very good

4,238 reviews

Reviews

1 / 20

8.0

Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

United Airlines

7.4

Good

8,899 reviews

Southwest

8.0

Very good

4,238 reviews

Reviews

1 / 20

8.0

Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

American Airlines

7.2

Good

10,000 reviews

Southwest

8.0

Very good

4,238 reviews

Reviews

1 / 20

8.0

Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

Spirit Airlines

6.3

Okay

8,040 reviews

Southwest

8.0

Very good

4,238 reviews

Reviews

1 / 20

8.0

Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

Related info for your journey

What airports do I use to fly from Austin to St. Louis?
If you book a flight from Austin to St. Louis, you will be flying from Austin Bergstrom to Lambert-St Louis. Flights to Lambert-St Louis (STL) from Austin Bergstrom (AUS) take 2h 00m for a nonstop flight. There are 2 flights from Austin Bergstrom to St. Louis per day from 4 airlines.
How popular is this Austin to St. Louis flight route?
This flight path from Austin Bergstrom to Lambert-St Louis was viewed by 12 users in the past month. Keep an eye out for changes in search interest prior to high and low season.
What are the cheapest airlines flying from Austin to St. Louis round-trip?
Our cheapest airline available from Austin to St. Louis is Southwest. Our recent data shows that you can find tickets from as low as $157 on this airline. Additional options worth looking into are American Airlines and Delta, starting at $177 and $187 round-trip. You may be able to fly from Austin to St. Louis for 52% less than the average price by searching for these airlines.
What are the cheapest airlines to fly from Austin to St. Louis one-way?
$79 is the cheapest one-way deal found within the past few days, from Southwest. You may also be able to find cheap deals on American Airlines and Spirit Airlines, with prices starting from $87 and $88, respectively.
What are the cheapest flights from Austin to St. Louis?
While on average a flight from Austin to St. Louis is generally $293, our data shows the cheapest flight currently is $89. When looking at the most popular route, (Austin Bergstrom - Lambert-St Louis), you can expect to pay $169 for that flight.
Can I find deals for flights from Austin to St. Louis that include hotel bookings?
Yes. In addition to deals on Austin to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Austin to St. Louis?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Austin to St. Louis.
Can I find deals for business class flights from Austin to St. Louis?
Yes. Cheapflights offers flight deals from Austin to St. Louis by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Austin to St. Louis?
Currently, August is the cheapest month in which you can book a flight from Austin to St. Louis (average of $311). Flying from Austin to St. Louis in March is currently the most expensive (average of $356). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

O'Fallon

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Collinsville

Eureka

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Glencoe

Alton

Chesterfield

Festus

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Top 5 airlines flying from Austin to St. Louis

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest$139	Average$300	FlexibilityNo cancel fee	On-time62%
Delta	Cheapest$145	Average$264	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$194	Average$304	FlexibilityNo cancel fee	On-time69%
American Airlines	Cheapest$216	Average$346	FlexibilityNo cancel fee	On-time71%
Southwest	Cheapest$223	Average$328	FlexibilityNo cancel fee	On-time63%

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$79+ Cheap flights from Austin to St. Louis (AUS - STL)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/28. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Austin to St. Louis with Cheapflights

1. Tell us where you want to go

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3. Compare prices and book

Cheapflights Tip: The best prices from Austin Bergstrom to Lambert-St Louis are usually found in April or August, booked 51 days in advance, depart on a Tuesday or Wednesday and return on a Tuesday

Cheap flight deals from Austin to St. Louis

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find flight deals from Austin to St. Louis

Cheapest flights from Austin to St. LouisExplore the most affordable flight options available from Austin to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.

Explore the most affordable flight options available from Austin to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Austin to St. Louis that are best for you.

Best time to book a flight from Austin to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Austin with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Austin to St. Louis

How far ahead should I book a flight from Austin to St. Louis?

Use this chart to determine the optimal time to book a round-trip flight from Austin to St. Louis. Price data was last updated on July 25, 2025.

What is the cheapest month to book a flight from Austin to St. Louis?

What is the cheapest time of day to fly from AUS to STL?

Find hourly flight availability from Austin to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 29, 2025.

Reviews of airlines servicing St. Louis

Read through reviews of airlines operating flights from Austin to St. Louis, such as Southwest, Delta, and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Austin to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What airports do I use to fly from Austin to St. Louis?

How popular is this Austin to St. Louis flight route?

What are the cheapest airlines flying from Austin to St. Louis round-trip?

What are the cheapest airlines to fly from Austin to St. Louis one-way?

What are the cheapest flights from Austin to St. Louis?

Can I find deals for flights from Austin to St. Louis that include hotel bookings?

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

Can I find deals for business class flights from Austin to St. Louis?

What is the cheapest month to book a flight from Austin to St. Louis?

Traveling to a place near St. Louis?

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Alternative routes for Austin to St. Louis

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Top 5 airlines flying from Austin to St. Louis

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Cheapest flights from Austin to St. Louis
Explore the most affordable flight options available from Austin to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.