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$54+ 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 9/5. Fares are subject to change and may not be available on all flights or dates of travel.
STL — AUS
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 May, booked 63 days in advance, depart on a Tuesday or Wednesday and return on a Tuesday

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 June 12, 2025.

Round-trip from

$163
(FlightHub)

One-way from

$54
(FlightHub)

Popular in

October

Cheapest in

September

Average price

$325

Good round-trip deal

$281 or less

Good one-way deal

$145 or less
From Lambert-St Louis to Austin Bergstrom
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One-way flight from Lambert-St Louis to Austin Bergstrom
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Highest demand for flights based on searches. 1% potential increase in price ($6 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($5 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 Lambert-St Louis to Austin Bergstrom.
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Price to beat on a one-way flight from Lambert-St Louis to Austin Bergstrom.
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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 June 12, 2025.

This FlightHub deal was found by Cheapflights users on 6/12. 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.
Mon 9/228:44 amSTL - AUS
1 stop6h 52mSpirit Airlines
Thu 9/254:31 pmAUS - STL
1 stop15h 18mSpirit Airlines
Deal found 6/12$163
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/111:50 pmSTL - AUS
Nonstop2h 00mSouthwest
Mon 9/154:35 pmAUS - STL
Nonstop2h 05mSouthwest
Deal found 6/10$197
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.
Tue 8/129:23 amSTL - AUS
1 stop4h 20mAmerican Airlines
Thu 8/145:00 amAUS - STL
1 stop4h 00mAmerican Airlines
Deal found 6/11$217
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.
Tue 7/85:23 pmSTL - AUS
1 stop5h 37mDelta
Tue 7/155:04 pmAUS - STL
1 stop6h 49mDelta
Deal found 6/10$257
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/138:00 amSTL - AUS
2 stops7h 22mUnited Airlines
Wed 8/2012:10 pmAUS - STL
1 stop6h 48mUnited Airlines
Deal found 6/10$292
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/3011:24 amSTL - AUS
2 stops23h 36mMultiple Airlines
Fri 8/18:22 pmAUS - STL
1 stop13h 18mMultiple Airlines
Deal found 6/10$294
This Booking.com 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/207:29 pmSTL - AUS
1 stop28h 09mFrontier
Sun 6/226:00 amAUS - STL
1 stop27h 12mFrontier
Deal found 6/11$342

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 June 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 8/12

6:10 am-12:45 pm

1 stop6h 35m

Austin Bergstrom

Thu 8/14

5:05 am-7:10 am

Nonstop2h 05m

$207

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Tue 8/12

9:23 am-1:43 pm

1 stop4h 20m

Austin Bergstrom

Thu 8/14

5:00 am-9:00 am

1 stop4h 00m

$217

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Thu 7/10

10:47 am-12:52 pm

1 stop26h 05m

Austin Bergstrom

Thu 7/17

1:18 pm-9:52 am

1 stop20h 34m

$230

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Tue 7/8

5:23 pm-11:00 pm

1 stop5h 37m

Austin Bergstrom

Tue 7/15

5:04 pm-11:53 pm

1 stop6h 49m

$257

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Wed 8/13

8:00 am-3:22 pm

2 stops7h 22m

Austin Bergstrom

Wed 8/20

12:10 pm-6:58 pm

1 stop6h 48m

$292

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Wed 7/30

11:24 am-11:00 am

2 stops23h 36m

Austin Bergstrom

Fri 8/1

8:22 pm-9:40 am

1 stop13h 18m

$294

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Fri 6/20

7:29 pm-11:38 pm

1 stop28h 09m

Austin Bergstrom

Sun 6/22

6:00 am-9:12 am

1 stop27h 12m

$342

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Tue 7/1

7:32 pm-4:56 pm

2 stops21h 24m

Austin Bergstrom

Tue 7/15

4:11 pm-6:35 pm

2 stops26h 24m

$565

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Fri 9/5

8:44 am-3:36 pm

1 stop6h 52m

$54

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Wed 9/3

4:25 pm-6:25 pm

Nonstop2h 00m

$99

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 16 results
1
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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 June 9, 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 36 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, January is the cheapest month in which you can book a flight from St. Louis to Austin (average of $286). Flying from St. Louis to Austin in March is currently the most expensive (average of $362). 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 June 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 7% versus a flight at noon.

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 June 8, 2025.

Travelers seeking maximum savings on their St. Louis to Austin flight should consider departing on Tuesday mornings 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.

Rainfall in Austin by month

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

In terms of precipitation, rainfall in Austin ranges from 2.1 - 4.2 inches per month. May is typically the wettest month, when rainfall can reach 4.2 in. July is typically the driest time to visit Austin when rainfall is around 2.1 in.

Temperature in Austin by month

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

If weather is an important factor for your trip to Austin, 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 84.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 50.0 F).

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 June 12, 2025.
Get a feel of what it's like to fly with Alaska Airlines, Southwest and Delta from St. Louis to Austin by reading reviews from past customers. 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 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?

    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.

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

    According to our current data, Spirit Airlines ($163), Southwest ($197), and American Airlines ($217) offers the cheapest pricing from St. Louis to Austin. Users have found that Spirit Airlines is 47% 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 Spirit Airlines ($54), Southwest ($99), and American Airlines ($108).

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

    While on average a flight from St. Louis to Austin is generally $284, our data shows the cheapest flight currently is $111. When looking at the most popular route, (Lambert-St Louis - Austin Bergstrom), you can expect to pay $163 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, January is the cheapest month in which you can book a flight from St. Louis to Austin (average of $286). Flying from St. Louis to Austin in March is currently the most expensive (average of $362). 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
San Marcos
Georgetown
Fredericksburg
Pflugerville
Round Rock
Dripping Springs
Cedar Park
Canyon Lake
Bastrop
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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$141Average$198FlexibilityNo cancel feeOn-time62%
DeltaCheapest$196Average$268FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$204Average$303FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$215Average$334FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$244Average$344FlexibilityNo cancel feeOn-time69%

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