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$61+ Cheap flights from St. Louis to Austin (STL - AUS)

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 2/8. Fares are subject to change and may not be available on all flights or dates of travel.
STL — AUS
Feb 20 — Feb 271
Fri 2/20
Fri 2/27
1 adult, Economy
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Cheapflights Tip: The best prices from Lambert-St Louis to Austin Bergstrom are usually found in September or August, booked 63 days in advance, depart on a Tuesday or Thursday and return on a Tuesday

Cheap flight deals from St. Louis to Austin

Cheapest flights from St. Louis to Austin
Explore the most affordable flight options available from St. Louis to Austin. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 21, 2026.

This Kiwi.com deal was found by Cheapflights users on 1/21. 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 1/285:42 pm
STL
-
AUS
1 stop16h 39m
Frontier
Sat 1/3111:16 am
AUS
-
STL
1 stop12h 17m
Frontier
Deal found 1/21$130
This Frontier deal was found by Cheapflights users on 1/21. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/282:51 pm
STL
-
AUS
1 stop9h 25m
Frontier
Wed 3/48:30 am
AUS
-
STL
1 stop7h 23m
Frontier
Deal found 1/21$144
This Kiwi.com deal was found by Cheapflights users on 1/21. 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 1/305:42 pm
STL
-
AUS
1 stop16h 39m
Multiple Airlines
Sat 1/314:59 pm
AUS
-
STL
1 stop15h 25m
Multiple Airlines
Deal found 1/21$146
This Kiwi.com deal was found by Cheapflights users on 1/21. 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.
Sat 2/282:51 pm
STL
-
AUS
1 stop9h 25m
Multiple Airlines
Wed 3/47:15 am
AUS
-
STL
2 stops15h 12m
Multiple Airlines
Deal found 1/21$154
This Kiwi.com deal was found by Cheapflights users on 1/21. 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 2/188:17 pm
STL
-
AUS
1 stop19h 23m
Multiple Airlines
Wed 2/257:15 am
AUS
-
STL
2 stops15h 12m
Multiple Airlines
Deal found 1/21$157
This Priceline deal was found by Cheapflights users on 1/19. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/184:51 pm
STL
-
AUS
1 stop6h 22m
Frontier
Wed 2/258:30 am
AUS
-
STL
1 stop7h 23m
Frontier
Deal found 1/19$160
This Kiwi.com deal was found by Cheapflights users on 1/21. 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 2/188:17 pm
STL
-
AUS
1 stop19h 23m
Frontier
Mon 2/237:41 pm
AUS
-
STL
2 stops35h 10m
Frontier
Deal found 1/21$163
This Kiwi.com deal was found by Cheapflights users on 1/21. 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 3/68:12 pm
STL
-
AUS
1 stop13h 54m
Frontier
Sun 3/810:58 pm
AUS
-
STL
1 stop10h 51m
Frontier
Deal found 1/21$175
This Frontier deal was found by Cheapflights users on 1/20. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/212:51 pm
STL
-
AUS
1 stop9h 25m
Frontier
Fri 2/276:45 am
AUS
-
STL
1 stop6h 24m
Frontier
Deal found 1/20$179
This Expedia deal was found by Cheapflights users on 1/20. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/313:46 pm
STL
-
AUS
1 stop7h 25m
Frontier
Sat 2/711:16 am
AUS
-
STL
1 stop12h 17m
Frontier
Deal found 1/20$181
This Kiwi.com deal was found by Cheapflights users on 1/20. 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 3/43:49 pm
STL
-
AUS
1 stop24h 15m
Multiple Airlines
Sun 3/810:58 pm
AUS
-
STL
1 stop10h 51m
Multiple Airlines
Deal found 1/20$185

Find flight deals from St. Louis to Austin

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Austin (AUS). 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 January 21, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

Expedia
3 stars

Round-trip from

$144
(Frontier)

One-way from

$61
(Trip.com)

Popular in

March

Cheapest in

September

Average price

$327

Good round-trip deal

$275 or less

Good one-way deal

$148 or less
Provider with most accurate pricing for Lambert-St Louis-Austin Bergstrom flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lambert-St Louis-Austin Bergstrom flights.
Search Deals
From Lambert-St Louis to Austin Bergstrom
Search Deals
One-way flight from Lambert-St Louis to Austin Bergstrom
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($17 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 0% potential price decrease ($4 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals
Price to beat on a round-trip flight from Lambert-St Louis to Austin Bergstrom.
Search Deals
Price to beat on a one-way flight from Lambert-St Louis to Austin Bergstrom.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from St. Louis to Austin 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 January 21, 2026.
Use the filters below to find and compare flights from St. Louis to Austin that are best for you.

Fly from

St. Louis

Fly to

Austin

Route

Depart

Return

Price

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Fri 1/30

5:42 pm-10:21 am

1 stop16h 39m

Austin Bergstrom

Sun 2/1

7:26 pm-9:21 am

1 stop13h 55m

$130

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Wed 1/28

5:42 pm-10:21 am

1 stop16h 39m

Austin Bergstrom

Sun 2/1

7:26 pm-9:21 am

1 stop13h 55m

$130

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Fri 3/6

8:12 pm-10:06 am

1 stop13h 54m

Austin Bergstrom

Sun 3/8

10:58 pm-9:49 am

1 stop10h 51m

$175

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Wed 1/28

5:42 pm-10:21 am

1 stop16h 39m

Austin Bergstrom

Fri 1/30

5:58 pm-6:51 am

1 stop12h 53m

$187

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Wed 1/28

5:42 pm-10:21 am

1 stop16h 39m

Austin Bergstrom

Mon 2/2

11:59 am-6:51 am

2 stops42h 52m

$191

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Wed 3/4

10:25 am-12:45 pm

Nonstop2h 20m

Austin Bergstrom

Thu 3/5

5:35 am-9:35 am

1 stop4h 00m

$209

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Fri 1/30

5:42 pm-10:21 am

1 stop16h 39m

Austin Bergstrom

Mon 2/2

5:58 pm-11:33 pm

2 stops29h 35m

$210

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Thu 4/9

9:40 pm-11:50 pm

Nonstop2h 10m

Austin Bergstrom

Sat 4/11

9:05 am-2:20 pm

1 stop5h 15m

$219

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Wed 2/18

7:55 pm-10:10 pm

Nonstop2h 15m

Austin Bergstrom

Wed 2/25

5:35 am-7:35 am

Nonstop2h 00m

$219

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Sat 4/18

7:15 am-1:17 pm

1 stop6h 02m

Austin Bergstrom

Tue 4/21

6:00 pm-11:12 pm

1 stop5h 12m

$220

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/21

Showing 1-10 of 22 results
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2
3

Compare providers for flights from St. Louis to Austin

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 St. Louis to Austin in January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
PricelinePrice Accuracy1 starTrust 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 St. Louis-Austin flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Austin flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Austin flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on St. Louis-Austin flights, Cheapflights users trust Expedia the most. Expedia 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 St. Louis-Austin 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 St. Louis to Austin

Have a flexible travel schedule? Discover the best time to fly to Austin from St. Louis 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 St. Louis to Austin

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

Use this chart to determine the optimal time to book a round-trip flight from St. Louis to Austin. Price data was last updated on January 16, 2026.

The price you pay for your flight from St. Louis to Austin may vary depending on when you book. For the best chance of a lower fare, look to book 63 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 St. Louis to Austin?

Currently, October is the cheapest month in which you can book a flight from St. Louis to Austin (average of $153). Flying from St. Louis to Austin in June is currently the most expensive (average of $228). 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 STL to AUS?

Find hourly flight availability from St. Louis to Austin. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated January 21, 2026.

When flying from St. Louis to Austin, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 12% versus a flight in the afternoon.

Reviews of airlines servicing Austin

Get insights into the airlines that provide service to Austin. 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 Austin. Reviews last updated January 21, 2026.
Read reviews from past customers who have flown Southwest, Delta, and United Airlines from St. Louis to Austin. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,266 reviews

Overall

8.0

Comfort

8.0

Crew

8.6

Entertainment

7.5

Food

7.0

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Southwest
8.0
Very good
4,266 reviews
Southwest
8.0
Very good
4,266 reviews

Overall

8.0

Comfort

8.0

Crew

8.6

Entertainment

7.5

Food

7.0

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Delta
7.9
Good
8,089 reviews
Southwest
8.0
Very good
4,266 reviews

Overall

8.0

Comfort

8.0

Crew

8.6

Entertainment

7.5

Food

7.0

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
United Airlines
7.4
Good
9,191 reviews
Southwest
8.0
Very good
4,266 reviews

Overall

8.0

Comfort

8.0

Crew

8.6

Entertainment

7.5

Food

7.0

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
American Airlines
7.2
Good
11,174 reviews
Southwest
8.0
Very good
4,266 reviews

Overall

8.0

Comfort

8.0

Crew

8.6

Entertainment

7.5

Food

7.0

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Frontier
5.7
Fair
3,057 reviews
Southwest
8.0
Very good
4,266 reviews

Overall

8.0

Comfort

8.0

Crew

8.6

Entertainment

7.5

Food

7.0

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Austin. 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 St. Louis to Austin?

    If you book a flight from St. Louis to Austin, you will be flying from Lambert-St Louis to Austin Bergstrom. Flights to Austin Bergstrom (AUS) from Lambert-St Louis (STL) take 2h 00m for a nonstop flight. There is 1 flight from Lambert-St Louis to Austin per day from 5 airlines.

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

    The Lambert-St Louis to Austin Bergstrom flight path was viewed by 9 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 St. Louis to Austin?

    There are many flights that can get you from St. Louis to Austin in 16h 39m. Fly via Frontier to get the fastest option. The distance between St. Louis and Austin is about 722 mi.

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

    According to our current data, Delta ($98), Frontier ($135), and United Airlines ($167) offers the cheapest pricing from St. Louis to Austin. Users have found that Delta is 68% cheaper than the other options available to this destination.

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

    The cheapest airlines for a one-way flight from St. Louis to Austin are Delta ($80), United Airlines ($95), and American Airlines ($98).

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

    While on average a flight from St. Louis to Austin is generally $261, our data shows the cheapest flight currently is $124. When looking at the most popular route, (Lambert-St Louis - Austin Bergstrom), you can expect to pay $181 for that flight.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from St. Louis to Austin 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 St. Louis to Austin?

    Currently, October is the cheapest month in which you can book a flight from St. Louis to Austin (average of $153). Flying from St. Louis to Austin in June is currently the most expensive (average of $228). 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 Austin?

Book flights to Austin if you plan to visit one of these locations
Cedar Park
Fredericksburg
Round Rock
San Marcos
Georgetown
Pflugerville
Dripping Springs
Canyon Lake
Seguin
Horseshoe Bay

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for St. Louis to Austin

See prices for flight routes from nearby airports that may be better suited for you.
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Top 5 airlines flying from St. Louis to Austin

Discover the top 5 airlines that operate flights from St. Louis to Austin. 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 January 21, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$98Average$216FlexibilityNo cancel feeOn-timeN/A
FrontierCheapest$135Average$220FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$167Average$360FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$176Average$318FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$199Average$325FlexibilityNo cancel feeOn-time63%

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