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$82+ 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 9/4. Fares are subject to change and may not be available on all flights or dates of travel.
AUS — STL
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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Cheapflights Tip: The best prices from Austin Bergstrom to Lambert-St Louis are usually found in July or August, booked 77 days in advance, depart on a Tuesday or Wednesday and return on a Tuesday

Cheap 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 June 12, 2025.

Round-trip from

$188
(Mytrip)

One-way from

$82
(Mytrip)

Popular in

March

Cheapest in

July

Average price

$321

Good round-trip deal

$276 or less

Good one-way deal

$161 or less
From Austin Bergstrom to Lambert-St Louis
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One-way flight from Austin Bergstrom to Lambert-St Louis
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Highest demand for flights based on searches. 6% potential increase in price ($22 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 12, 2025.

This Mytrip deal was found by Cheapflights users on 6/11. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/101:18 pmAUS - STL
1 stop20h 34mSpirit Airlines
Sun 7/1310:47 amSTL - AUS
1 stop26h 05mSpirit Airlines
Deal found 6/11$188
This Southwest deal was found by Cheapflights users on 6/11. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/53:45 pmAUS - STL
Nonstop2h 10mSouthwest
Mon 8/119:40 pmSTL - AUS
Nonstop2h 00mSouthwest
Deal found 6/11$197
This CheapOair deal was found by Cheapflights users on 6/10. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/136:00 amAUS - STL
1 stop27h 07mFrontier
Tue 9/167:52 pmSTL - AUS
1 stop27h 42mFrontier
Deal found 6/10$218
This American Airlines deal was found by Cheapflights users on 6/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/134:09 pmAUS - STL
1 stop4h 06mAmerican Airlines
Tue 9/167:10 amSTL - AUS
1 stop4h 28mAmerican Airlines
Deal found 6/11$228
This FlightHub deal was found by Cheapflights users on 6/11. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/229:35 pmAUS - STL
1 stop11h 36mMultiple Airlines
Thu 8/288:44 amSTL - AUS
1 stop6h 52mMultiple Airlines
Deal found 6/11$236
This Delta deal was found by Cheapflights users on 6/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/65:35 amAUS - STL
1 stop6h 56mDelta
Sat 9/136:00 amSTL - AUS
1 stop7h 51mDelta
Deal found 6/10$239
This United Airlines deal was found by Cheapflights users on 6/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/45:00 amAUS - STL
1 stop4h 28mUnited Airlines
Tue 7/298:00 amSTL - AUS
2 stops7h 22mUnited Airlines
Deal found 6/11$283

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 June 12, 2025.
Use the filters below to find and compare flights from Austin to St. Louis that are best for you.

Fly from

Austin

Fly to

St. Louis

Route

Depart

Return

Price

AustinSt. Louis

AUS - STL

AUSSTL

Austin Bergstrom

Thu 7/10

1:18 pm-9:52 am

1 stop20h 34m

Lambert-St Louis

Sun 7/13

10:47 am-12:52 pm

1 stop26h 05m

$188

AustinSt. Louis

AUS - STL

AUSSTL

Austin Bergstrom

Tue 8/5

3:45 pm-5:55 pm

Nonstop2h 10m

Lambert-St Louis

Mon 8/11

9:40 pm-11:40 pm

Nonstop2h 00m

$197

AustinSt. Louis

AUS - STL

AUSSTL

Austin Bergstrom

Fri 8/22

9:35 pm-9:11 am

1 stop11h 36m

Lambert-St Louis

Thu 8/28

8:44 am-3:36 pm

1 stop6h 52m

$236

AustinSt. Louis

AUS - STL

AUSSTL

Austin Bergstrom

Fri 8/15

1:28 pm-9:27 pm

1 stop7h 59m

Lambert-St Louis

Sat 8/30

6:00 am-1:47 pm

1 stop7h 47m

$250

AustinSt. Louis

AUS - STL

AUSSTL

Austin Bergstrom

Thu 7/31

5:00 am-9:18 am

1 stop4h 18m

Lambert-St Louis

Mon 8/4

5:30 am-9:35 am

1 stop4h 05m

$254

AustinSt. Louis

AUS - STL

AUSSTL

Austin Bergstrom

Fri 7/4

5:00 am-9:28 am

1 stop4h 28m

Lambert-St Louis

Tue 7/29

8:00 am-3:22 pm

2 stops7h 22m

$283

AustinSt. Louis

AUS - STL

AUSSTL

Austin Bergstrom

Tue 6/24

7:00 am-9:12 am

1 stop26h 12m

Lambert-St Louis

Fri 6/27

7:29 pm-11:38 pm

1 stop28h 09m

$342

AustinSt. Louis

AUS - STL

AUSSTL

Austin Bergstrom

Thu 9/4

4:31 pm-7:49 am

1 stop15h 18m

$82

AustinSt. Louis

AUS - STL

AUSSTL

Austin Bergstrom

Mon 8/4

6:50 am-8:55 am

Nonstop2h 05m

$99

AustinSt. Louis

AUS - STL

AUSSTL

Austin Bergstrom

Wed 9/10

7:00 am-11:56 am

1 stop4h 56m

$108

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

Showing 1-10 of 15 results
1
2

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?

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 June 9, 2025.

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 77 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?

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 June 12, 2025.

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 43% on airfare.

Rainfall in St. Louis by month

Plan your trip to St. Louis by taking into account the average rainfall totals by month.

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.

Temperature in St. Louis by month

Plan your trip to St. Louis by taking into account the average temperature totals by month.

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).

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 June 12, 2025.
Peruse reviews from past customers who have flown with Alaska Airlines, Southwest and Delta from Austin to St. Louis to help guide your decision. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Overall

8.0

Food

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Overall

8.0

Food

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,287 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Overall

8.0

Food

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,946 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Overall

8.0

Food

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,790 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Overall

8.0

Food

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Overall

8.0

Food

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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 05m 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 7 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 Spirit Airlines. Our recent data shows that you can find tickets from as low as $188 on this airline. Additional options worth looking into are Southwest and Delta, starting at $197 and $239 round-trip. You may be able to fly from Austin to St. Louis for 42% less than the average price by searching for these airlines.

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

    $82 is the cheapest one-way deal found within the past few days, from Spirit Airlines. You may also be able to find cheap deals on Southwest and American Airlines, with prices starting from $99 and $108, respectively.

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

    While on average a flight from Austin to St. Louis is generally $274, our data shows the cheapest flight currently is $145. When looking at the most popular route, (Austin Bergstrom - Lambert-St Louis), you can expect to pay $170 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

Traveling to a place near Austin?

Book flights to Austin if you plan to visit one of these locations
O'Fallon
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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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$139Average$278FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$194Average$297FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$196Average$328FlexibilityNo cancel feeOn-time71%
DeltaCheapest$198Average$263FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$223Average$326FlexibilityNo cancel feeOn-time63%

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