HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Austin

$55+ 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 12/8. Fares are subject to change and may not be available on all flights or dates of travel.
STL — AUS
Nov 26 — Dec 31
Wed 11/26
Wed 12/3
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from St. Louis to Austin 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 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

Find 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 October 27, 2025.

This Frontier deal was found by Cheapflights users on 10/26. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/132:12 pmSTL - AUS
1 stop26h 33mFrontier
Mon 11/176:00 amAUS - STL
1 stop27h 07mFrontier
Deal found 10/26$132
This Mytrip deal was found by Cheapflights users on 10/25. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/107:45 pmSTL - AUS
1 stop24h 57mFrontier
Wed 11/127:45 amAUS - STL
1 stop25h 22mFrontier
Deal found 10/25$139
This Mytrip deal was found by Cheapflights users on 10/26. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/137:45 pmSTL - AUS
1 stop13h 57mFrontier
Sun 11/166:00 amAUS - STL
1 stop27h 07mFrontier
Deal found 10/26$152
This Booking.com deal was found by Cheapflights users on 10/25. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/37:43 pmSTL - AUS
1 stop28h 31mFrontier
Fri 12/56:55 amAUS - STL
1 stop27h 19mFrontier
Deal found 10/25$155
This Kiwi.com deal was found by Cheapflights users on 10/24. 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.
Sun 12/1410:42 amSTL - AUS
2 stops22h 41mFrontier
Wed 12/245:51 pmAUS - STL
1 stop15h 49mFrontier
Deal found 10/24$173
This Booking.com deal was found by Cheapflights users on 10/24. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/142:42 pmSTL - AUS
1 stop24h 42mFrontier
Mon 11/176:00 amAUS - STL
1 stop27h 07mFrontier
Deal found 10/24$175
This Mytrip deal was found by Cheapflights users on 10/25. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/92:42 pmSTL - AUS
1 stop22h 41mFrontier
Thu 11/135:14 pmAUS - STL
1 stop23h 06mFrontier
Deal found 10/25$178
This Mytrip deal was found by Cheapflights users on 10/26. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/47:45 pmSTL - AUS
1 stop24h 57mFrontier
Thu 11/66:00 amAUS - STL
1 stop27h 07mFrontier
Deal found 10/26$185
This Booking.com deal was found by Cheapflights users on 10/25. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/27:45 pmSTL - AUS
1 stop13h 57mFrontier
Wed 11/57:45 amAUS - STL
1 stop25h 22mFrontier
Deal found 10/25$188
This Booking.com deal was found by Cheapflights users on 10/26. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/77:45 pmSTL - AUS
1 stop27h 31mFrontier
Mon 11/1010:37 amAUS - STL
1 stop22h 30mFrontier
Deal found 10/26$195
This Southwest deal was found by Cheapflights users on 10/25. 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.
Thu 12/42:40 pmSTL - AUS
Nonstop2h 10mSouthwest
Mon 12/85:30 amAUS - STL
Nonstop2h 05mSouthwest
Deal found 10/25$197
This Frontier deal was found by Cheapflights users on 10/25. 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.
Fri 12/510:42 amSTL - AUS
1 stop6h 31mFrontier
Sun 12/710:38 amAUS - STL
1 stop11h 55mFrontier
Deal found 10/25$202

Cheap 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 October 27, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$132
(Frontier)

One-way from

$55
(Priceline)

Popular in

October

Cheapest in

September

Average price

$384

Good round-trip deal

$257 or less

Good one-way deal

$189 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
High demand for flights, 1% potential price rise
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
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 October 27, 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

Fri 11/14

2:42 pm-3:24 pm

1 stop24h 42m

Austin Bergstrom

Mon 11/17

6:00 am-9:07 am

1 stop27h 07m

$175

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Sun 11/2

7:45 pm-9:42 am

1 stop13h 57m

Austin Bergstrom

Wed 11/5

7:45 am-9:07 am

1 stop25h 22m

$188

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Mon 11/3

7:45 pm-8:42 pm

1 stop24h 57m

Austin Bergstrom

Fri 11/14

5:40 pm-3:38 pm

1 stop21h 58m

$188

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Thu 12/4

2:40 pm-4:50 pm

Nonstop2h 10m

Austin Bergstrom

Mon 12/8

5:30 am-7:35 am

Nonstop2h 05m

$197

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Thu 12/4

7:05 am-12:37 pm

1 stop5h 32m

Austin Bergstrom

Mon 12/8

6:27 pm-11:42 pm

1 stop5h 15m

$207

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Sun 12/14

10:42 am-5:13 pm

1 stop6h 31m

Austin Bergstrom

Wed 12/24

5:51 pm-9:40 am

1 stop15h 49m

$213

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Wed 12/3

8:25 pm-10:35 pm

Nonstop2h 10m

Austin Bergstrom

Fri 12/5

2:05 pm-5:25 pm

1 stop3h 20m

$219

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Fri 10/31

1:09 pm-8:55 pm

1 stop7h 46m

Austin Bergstrom

Mon 11/3

6:00 am-9:07 am

1 stop27h 07m

$221

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Sun 12/14

10:55 pm-1:05 am

Nonstop2h 10m

Austin Bergstrom

Wed 12/24

3:20 pm-5:25 pm

Nonstop2h 05m

$223

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Fri 1/2

6:05 am-11:57 am

1 stop5h 52m

Austin Bergstrom

Mon 1/5

6:00 pm-11:10 pm

1 stop5h 10m

$228

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/27

Showing 1-10 of 20 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 October.
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 October 24, 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 $128). Flying from St. Louis to Austin in June is currently the most expensive (average of $227). 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 October 27, 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 evening, which can drop the price by up to 8% 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 October 19, 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. Sunday 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 October 27, 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.
Southwest
8.0
Very good
4,236 reviews

Crew

8.6

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Overall

8.0

Food

7.0

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
4,236 reviews
Southwest
8.0
Very good
4,236 reviews

Crew

8.6

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Overall

8.0

Food

7.0

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
7,996 reviews
Southwest
8.0
Very good
4,236 reviews

Crew

8.6

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Overall

8.0

Food

7.0

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
8,997 reviews
Southwest
8.0
Very good
4,236 reviews

Crew

8.6

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Overall

8.0

Food

7.0

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
11,033 reviews
Southwest
8.0
Very good
4,236 reviews

Crew

8.6

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Overall

8.0

Food

7.0

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
5.8
Fair
3,122 reviews
Southwest
8.0
Very good
4,236 reviews

Crew

8.6

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Overall

8.0

Food

7.0

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 05m 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 8 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 2h 10m. Fly via Frontier or Southwest 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 Frontier ($68), Spirit Airlines ($80), and Southwest ($99).

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

    While on average a flight from St. Louis to Austin is generally $302, our data shows the cheapest flight currently is $155. When looking at the most popular route, (Lambert-St Louis - Austin Bergstrom), you can expect to pay $173 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 $128). Flying from St. Louis to Austin in June is currently the most expensive (average of $227). 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
Fredericksburg
Pflugerville
Dripping Springs
Georgetown
Canyon Lake
Seguin
Horseshoe Bay

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 St. Louis to Austin

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

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 October 27, 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$183Average$313FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$199Average$332FlexibilityNo cancel feeOn-time63%

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.