HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
St. Louis

$86+ 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 8/26. Fares are subject to change and may not be available on all flights or dates of travel.
AUS — STL
Aug 26 — Sep 21
Wed 8/26
Wed 9/2
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Austin to St. Louis with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.
Cheapflights Tip: The best prices from Austin Bergstrom to Lambert-St Louis are usually found in October or May, booked 58 days in advance, depart on a Friday or Tuesday and return on a Saturday

Cheap 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 27, 2026.

This Kiwi.com deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/1610:50 am
AUS
-
STL
1 stop22h 50m
Frontier
Tue 9/2210:35 am
STL
-
AUS
1 stop23h 13m
Frontier
Deal found 7/23$169
This Kiwi.com deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/610:50 am
AUS
-
STL
1 stop22h 50m
Frontier
Tue 10/1310:35 am
STL
-
AUS
1 stop23h 13m
Frontier
Deal found 7/23$170
This Kiwi.com deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/910:50 am
AUS
-
STL
1 stop22h 50m
Frontier
Mon 10/1210:35 am
STL
-
AUS
1 stop23h 13m
Frontier
Deal found 7/22$171
This Kiwi.com deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/275:37 pm
AUS
-
STL
1 stop23h 45m
Frontier
Sun 8/306:17 pm
STL
-
AUS
1 stop22h 22m
Frontier
Deal found 7/24$172
This Kiwi.com deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/1510:50 am
AUS
-
STL
1 stop22h 50m
Frontier
Mon 10/1910:35 am
STL
-
AUS
1 stop23h 13m
Frontier
Deal found 7/26$173
This Kiwi.com deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/275:37 pm
AUS
-
STL
1 stop23h 45m
Frontier
Mon 8/316:17 pm
STL
-
AUS
1 stop22h 22m
Frontier
Deal found 7/24$176
This Kiwi.com deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1710:50 am
AUS
-
STL
1 stop22h 50m
Frontier
Sun 9/2010:35 am
STL
-
AUS
1 stop23h 13m
Frontier
Deal found 7/23$177
This Kiwi.com deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/210:50 am
AUS
-
STL
1 stop22h 50m
Frontier
Mon 10/510:35 am
STL
-
AUS
1 stop23h 13m
Frontier
Deal found 7/23$178
This Kiwi.com deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/2410:50 am
AUS
-
STL
1 stop26h 20m
Frontier
Wed 9/302:29 pm
STL
-
AUS
1 stop27h 19m
Frontier
Deal found 7/27$182
This Kiwi.com deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/206:15 am
AUS
-
STL
1 stop12h 58m
Frontier
Sun 8/236:17 pm
STL
-
AUS
1 stop22h 22m
Frontier
Deal found 7/22$183
This Kiwi.com deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/135:34 pm
AUS
-
STL
1 stop15h 23m
Frontier
Mon 8/174:57 pm
STL
-
AUS
1 stop23h 42m
Frontier
Deal found 7/23$188
This Kiwi.com deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1710:50 am
AUS
-
STL
1 stop26h 20m
Frontier
Mon 9/218:10 pm
STL
-
AUS
1 stop23h 11m
Frontier
Deal found 7/24$193

Find flight deals from Austin to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from Austin (AUS) to St. Louis (STL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated July 27, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$169
(Kiwi.com)

One-way from

$86
(Kiwi.com)

Popular in

July

Cheapest in

October

Average price

$400

Good round-trip deal

$292 or less

Good one-way deal

$229 or less
Provider with most accurate pricing for Austin Bergstrom-Lambert-St Louis flight deals.
Search Deals
Provider most trusted by Cheapflights users for Austin Bergstrom-Lambert-St Louis flights.
Search Deals
From Austin Bergstrom to Lambert-St Louis
Search Deals
One-way flight from Austin Bergstrom to Lambert-St Louis
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($15 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals
Price to beat on a round-trip flight from Austin Bergstrom to Lambert-St Louis.
Search Deals
Price to beat on a one-way flight from Austin Bergstrom to Lambert-St Louis.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Austin to St. Louis that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 27, 2026.
Use the filters below to find and compare flights from Austin to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

AustinSt. Louis

AUS - STL

AUSSTL

Austin Bergstrom

Tue 8/18

12:55 pm-4:25 pm

1 stop3h 30m

Lambert-St Louis

Thu 8/20

8:45 pm-10:45 pm

Nonstop2h 00m

$215
Quickest round-trip

AustinSt. Louis

AUS - STL

AUSSTL

Austin Bergstrom

Tue 9/1

7:30 am-9:35 am

Nonstop2h 05m

Lambert-St Louis

Sat 9/5

8:25 am-10:25 am

Nonstop2h 00m

$217

AustinSt. Louis

AUS - STL

AUSSTL

Austin Bergstrom

Tue 9/1

10:42 am-6:27 pm

1 stop7h 45m

Lambert-St Louis

Sat 9/5

3:44 pm-9:18 pm

1 stop5h 34m

$227

AustinSt. Louis

AUS - STL

AUSSTL

Austin Bergstrom

Fri 8/21

6:15 am-7:13 pm

1 stop12h 58m

Lambert-St Louis

Mon 8/24

7:58 pm-11:41 pm

1 stop27h 43m

$254

AustinSt. Louis

AUS - STL

AUSSTL

Austin Bergstrom

Wed 9/23

7:30 am-9:35 am

Nonstop2h 05m

Lambert-St Louis

Fri 9/25

2:20 pm-8:10 pm

1 stop5h 50m

$254

AustinSt. Louis

AUS - STL

AUSSTL

Austin Bergstrom

Thu 8/20

3:15 pm-5:20 pm

Nonstop2h 05m

Lambert-St Louis

Sun 8/23

8:30 am-10:30 am

Nonstop2h 00m

$288

AustinSt. Louis

AUS - STL

AUSSTL

Austin Bergstrom

Thu 10/15

5:00 pm-7:05 pm

Nonstop2h 05m

Lambert-St Louis

Mon 10/19

12:50 pm-2:55 pm

Nonstop2h 05m

$292

AustinSt. Louis

AUS - STL

AUSSTL

Austin Bergstrom

Sun 8/16

5:30 am-10:10 am

1 stop4h 40m

Lambert-St Louis

Sun 8/16

5:30 pm-11:05 pm

1 stop5h 35m

$294

AustinSt. Louis

AUS - STL

AUSSTL

Austin Bergstrom

Tue 8/25

12:12 pm-6:04 pm

1 stop5h 52m

Lambert-St Louis

Tue 9/1

8:00 am-3:26 pm

2 stops7h 26m

$312

AustinSt. Louis

AUS - STL

AUSSTL

Austin Bergstrom

Mon 8/24

9:00 am-3:38 pm

1 stop6h 38m

Lambert-St Louis

Tue 8/25

7:25 am-3:26 pm

2 stops8h 01m

$312

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/23

Showing 1-10 of 22 resultsSorted by cheapest first
1
2
3

Compare providers for flights from Austin to St. Louis

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Austin to St. Louis in July.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
JustAirTicketPrice Accuracy-Trust Score*1 star
Super.comPrice Accuracy-Trust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Austin-St. Louis flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Austin-St. Louis flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Austin-St. Louis flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Austin-St. Louis flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Austin-St. Louis flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 57 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, October is the cheapest month in which you can book a flight from Austin to St. Louis (average of $279). Flying from Austin to St. Louis in July is currently the most expensive (average of $400). 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?

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 27, 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Austin to St. Louis as you normally would.

How much does it cost to fly round-trip from Austin to St. Louis?

Airfare is below average for this route at the moment.

Austin to St. Louis flights typically cost between $291 and $381 in September.
The cheapest round-trip price found within the last 5 days was $169 on Frontier (Sep 16-Sep 22).

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to St. Louis. Reviews last updated July 27, 2026.
Read through reviews of airlines operating flights from Austin to St. Louis, such as Southwest,Delta, andUnited Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,228 reviews

Entertainment

7.5

Food

7.0

Crew

8.6

Boarding

8.1

Overall

8.0

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.
Southwest
8.0
Very good
4,228 reviews
Southwest
8.0
Very good
4,228 reviews

Entertainment

7.5

Food

7.0

Crew

8.6

Boarding

8.1

Overall

8.0

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.
Delta
7.8
Good
8,483 reviews
Southwest
8.0
Very good
4,228 reviews

Entertainment

7.5

Food

7.0

Crew

8.6

Boarding

8.1

Overall

8.0

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.
United Airlines
7.4
Good
10,041 reviews
Southwest
8.0
Very good
4,228 reviews

Entertainment

7.5

Food

7.0

Crew

8.6

Boarding

8.1

Overall

8.0

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.
American Airlines
7.1
Good
11,836 reviews
Southwest
8.0
Very good
4,228 reviews

Entertainment

7.5

Food

7.0

Crew

8.6

Boarding

8.1

Overall

8.0

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.
Frontier
5.6
Fair
2,754 reviews
Southwest
8.0
Very good
4,228 reviews

Entertainment

7.5

Food

7.0

Crew

8.6

Boarding

8.1

Overall

8.0

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

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?

    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 5 airlines.

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

    This flight path from Austin Bergstrom to Lambert-St Louis was viewed by 15 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • How long is the flight from Austin to St. Louis?

    There are many flights that can get you from Austin to St. Louis in 3h 30m. Fly via Southwest, Delta, or Frontier to get the fastest option. The distance between Austin and St. Louis is about 722 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    Our cheapest airline available from Austin to St. Louis is Frontier. Our recent data shows that you can find tickets from as low as $160 on this airline. Additional options worth looking into are Delta and United Airlines, starting at $175 and $190 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?

    $102 is the cheapest one-way deal found within the past few days, from American Airlines. You may also be able to find cheap deals on Southwest and United Airlines, with prices starting from $110 and $138, respectively.

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

    While on average a flight from Austin to St. Louis is generally $341, our data shows the cheapest flight currently is $183. When looking at the most popular route, (Austin Bergstrom - Lambert-St Louis), you can expect to pay $217 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, October is the cheapest month in which you can book a flight from Austin to St. Louis (average of $279). Flying from Austin to St. Louis in July is currently the most expensive (average of $400). 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

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
Edwardsville
O'Fallon
Fenton
Swansea
Fairview Heights
Eureka
Maryland Heights
Collinsville
Wentzville
Glencoe
Chesterfield
Farmington

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Austin to St. Louis

See prices for flight routes from nearby airports that may be better suited for you.
Dallas/Fort Worth to St. Louis flights
Dallas/Fort Worth to Kansas City flights
George Bush Intcntl to Kansas City flights
Hobby to St. Louis flights
Hobby to Kansas City flights
George Bush Intcntl to St. Louis flights
Austin to Kansas City flights
Dallas/Fort Worth to Columbia flights
San Antonio to Kansas City flights
Love Field to St. Louis flights
Love Field to Kansas City flights
San Antonio to St. Louis flights
Dallas/Fort Worth to Springfield flights
Hobby to Springfield flights
Austin to Springfield flights
George Bush Intcntl to Springfield flights
Hobby to Columbia flights
San Antonio to Springfield flights
El Paso to Kansas City flights
Lubbock to Springfield flights
McAllen to Kansas City flights
Hobby to Joplin flights
El Paso to Springfield flights
Dallas/Fort Worth to Joplin flights
El Paso to St. Louis flights
Austin to Joplin flights
Lubbock to St. Louis flights
Lubbock to Kansas City flights
Midland to Springfield flights
Abilene to Springfield flights
Austin to Columbia flights
Dallas/Fort Worth to Branson flights
Love Field to Springfield flights
Corpus Christi to St. Louis flights
Killeen to St. Louis flights
San Antonio to Joplin flights
Lubbock to Columbia flights
Killeen to Springfield flights
McAllen to Joplin flights
Beaumont to Kansas City flights
Amarillo to Springfield flights
McAllen to Springfield flights
Killeen to Joplin flights
Laredo to Kansas City flights
Killeen to Fort Leonard Wood flights

Top 5 airlines flying from Austin to St. Louis

Discover the top 5 airlines that operate flights from Austin to St. Louis. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 27, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$160Average$227FlexibilityNo cancel feeOn-time62%
DeltaCheapest$175Average$248FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$190Average$313FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$208Average$349FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$254Average$351FlexibilityNo cancel feeOn-time71%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.