Austin

$64+ 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
Jan 11 — Jan 181
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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”

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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 Wednesday 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 December 12, 2025.

This American Airlines deal was found by Cheapflights users on 12/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/314:53 pmSTL - AUS
1 stop5h 35mAmerican Airlines
Wed 1/710:30 amAUS - STL
1 stop5h 44mAmerican Airlines
Deal found 12/10$259
This Trip.com deal was found by Cheapflights users on 12/11. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/1512:07 pmSTL - AUS
1 stop7h 53mFrontier
Thu 1/16:45 amAUS - STL
1 stop27h 17mFrontier
Deal found 12/11$263
This Delta deal was found by Cheapflights users on 12/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/315:13 pmSTL - AUS
1 stop7h 24mDelta
Wed 1/712:34 pmAUS - STL
1 stop6h 38mDelta
Deal found 12/9$283
This American Airlines deal was found by Cheapflights users on 12/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/235:16 amSTL - AUS
1 stop3h 59mAmerican Airlines
Tue 12/306:16 pmAUS - STL
1 stop5h 28mAmerican Airlines
Deal found 12/10$303
This Kiwi.com deal was found by Cheapflights users on 12/9. 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 12/3011:51 amSTL - AUS
1 stop13h 07mMultiple Airlines
Wed 1/76:00 amAUS - STL
1 stop16h 33mMultiple Airlines
Deal found 12/9$306
This United Airlines deal was found by Cheapflights users on 12/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/242:45 pmSTL - AUS
1 stop6h 40mUnited Airlines
Thu 12/256:45 amAUS - STL
1 stop7h 41mUnited Airlines
Deal found 12/10$332
This Southwest deal was found by Cheapflights users on 12/10. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/248:25 pmSTL - AUS
Nonstop2h 10mSouthwest
Thu 12/252:05 pmAUS - STL
1 stop3h 20mSouthwest
Deal found 12/10$333
This Kiwi.com deal was found by Cheapflights users on 12/9. 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 12/3011:51 amSTL - AUS
1 stop13h 07mMultiple Airlines
Tue 1/610:32 amAUS - STL
1 stop23h 30mMultiple Airlines
Deal found 12/9$334
This American Airlines deal was found by Cheapflights users on 12/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/305:16 amSTL - AUS
1 stop4h 55mAmerican Airlines
Sun 1/47:55 pmAUS - STL
1 stop5h 30mAmerican Airlines
Deal found 12/10$338
This Southwest deal was found by Cheapflights users on 12/10. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/305:20 amSTL - AUS
1 stop5h 00mSouthwest
Mon 1/55:05 amAUS - STL
Nonstop2h 05mSouthwest
Deal found 12/10$339

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 December 12, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$139
(Kiwi.com)

One-way from

$64
(Frontier)

Popular in

October

Cheapest in

September

Average price

$350

Good round-trip deal

$259 or less

Good one-way deal

$188 or less
Provider with most accurate pricing for Lambert-St Louis-Austin Bergstrom flight deals.
Provider most trusted by Cheapflights users for Lambert-St Louis-Austin Bergstrom flights.
From Lambert-St Louis to Austin Bergstrom
One-way flight from Lambert-St Louis to Austin Bergstrom
High demand for flights, 2% potential price rise
Cheapest flight prices on average. 1% potential price decrease ($4 potential savings vs. average RT price).
Average for round-trip flights in December 2025
Price to beat on a round-trip flight from Lambert-St Louis to Austin Bergstrom.
Price to beat on a one-way flight from Lambert-St Louis to Austin Bergstrom.

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 December 12, 2025.
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

Tue 1/6

7:55 pm-10:10 pm

Nonstop2h 15m

Austin Bergstrom

Wed 1/7

3:00 pm-5:05 pm

Nonstop2h 05m

$197

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Mon 1/12

6:00 am-1:57 pm

1 stop7h 57m

Austin Bergstrom

Wed 1/21

5:30 am-11:54 am

1 stop6h 24m

$217

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Thu 1/15

8:45 pm-11:00 pm

Nonstop2h 15m

Austin Bergstrom

Mon 1/19

5:10 am-7:10 am

Nonstop2h 00m

$217

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Fri 2/6

8:22 pm-10:34 am

2 stops14h 12m

Austin Bergstrom

Sun 2/8

8:15 pm-12:50 pm

1 stop16h 35m

$222

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Wed 1/21

10:25 am-12:45 pm

Nonstop2h 20m

Austin Bergstrom

Sun 1/25

3:00 pm-8:20 pm

1 stop5h 20m

$223

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Thu 1/15

6:00 pm-11:56 pm

1 stop5h 56m

Austin Bergstrom

Mon 1/19

5:55 pm-10:00 pm

1 stop4h 05m

$227

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Thu 1/15

8:45 pm-11:00 pm

Nonstop2h 15m

Austin Bergstrom

Sun 1/18

2:40 pm-8:35 pm

1 stop5h 55m

$233

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Thu 1/22

9:59 am-4:05 pm

1 stop6h 06m

Austin Bergstrom

Sun 1/25

6:25 pm-11:37 pm

1 stop5h 12m

$238

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Thu 2/19

8:45 pm-11:00 pm

Nonstop2h 15m

Austin Bergstrom

Sun 2/22

5:35 am-11:00 am

2 stops5h 25m

$238

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Sat 2/7

3:46 pm-11:11 pm

1 stop7h 25m

$80

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/10

Showing 1-10 of 18 results
1
2

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 December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on St. Louis-Austin flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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 December 5, 2025.

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 December 12, 2025.

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 morning, which can drop the price by up to 9% versus a flight in the afternoon.

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

Use this chart to determine the cheapest time to fly round-trip from St. Louis to Austin. Price data was last updated on December 6, 2025.

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

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 December 12, 2025.
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.

Entertainment

7.5

Food

7.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Overall

7.9

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

Entertainment

7.5

Food

7.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Overall

7.9

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

Entertainment

7.5

Food

7.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Overall

7.9

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

Entertainment

7.5

Food

7.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Overall

7.9

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

Entertainment

7.5

Food

7.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Overall

7.9

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

Entertainment

7.5

Food

7.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Overall

7.9

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 are 3 flights from Lambert-St Louis to Austin per day from 5 airlines.

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

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

    There are many flights that can get you from St. Louis to Austin in 2h 15m. Fly via Southwest or Delta to get the fastest option. The distance between St. Louis and Austin is about 722 mi. This flight may include one or multiple stops.

  • 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 $263, our data shows the cheapest flight currently is $119. When looking at the most popular route, (Lambert-St Louis - Austin Bergstrom), you can expect to pay $154 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
Round Rock
San Marcos
Georgetown
Fredericksburg
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.

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 December 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$98Average$243FlexibilityNo cancel feeOn-timeN/A
FrontierCheapest$135Average$234FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$167Average$360FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$176Average$324FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$199Average$328FlexibilityNo cancel feeOn-time63%

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