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$100+ 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 5/25. Fares are subject to change and may not be available on all flights or dates of travel.
STL — AUS
May 4 — May 111
Sun 5/4
Sun 5/11
1 adult, Economy
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Cheapflights Tip: The best prices from Lambert-St Louis to Austin Bergstrom are usually found in May or September, booked 63 days in advance, depart on a Monday or Tuesday 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 April 29, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$203
(American Airlines)

One-way from

$100
(Southwest)

Popular in

April

Cheapest in

May

Average price

$362

Good round-trip deal

$244 or less

Good one-way deal

$179 or less
Provider with most accurate pricing for Lambert-St Louis-Austin Bergstrom flight deals.
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Provider most trusted by Cheapflights users for Lambert-St Louis-Austin Bergstrom flights.
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From Lambert-St Louis to Austin Bergstrom
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One-way flight from Lambert-St Louis to Austin Bergstrom
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($14 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($4 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 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.
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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 April 29, 2025.

This American Airlines deal was found by Cheapflights users on 4/28. 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 6/39:36 amSTL - AUS
1 stop7h 36mAmerican Airlines
Tue 6/36:52 pmAUS - STL
1 stop3h 53mAmerican Airlines
Deal found 4/28$203
This Delta deal was found by Cheapflights users on 4/28. 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 5/2711:32 amSTL - AUS
1 stop5h 41mDelta
Thu 5/296:40 amAUS - STL
1 stop8h 20mDelta
Deal found 4/28$209
This Southwest deal was found by Cheapflights users on 4/28. 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 5/275:20 pmSTL - AUS
Nonstop2h 05mSouthwest
Thu 5/295:00 amAUS - STL
Nonstop2h 05mSouthwest
Deal found 4/28$211
This Booking.com deal was found by Cheapflights users on 4/27. 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 4/306:58 pmSTL - AUS
1 stop17h 07mFrontier
Thu 5/14:56 pmAUS - STL
1 stop28h 09mFrontier
Deal found 4/27$218
This United Airlines deal was found by Cheapflights users on 4/28. 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.
Thu 8/216:15 amSTL - AUS
1 stop4h 43mUnited Airlines
Sun 8/245:30 amAUS - STL
2 stops6h 55mUnited Airlines
Deal found 4/28$267
This Mytrip deal was found by Cheapflights users on 4/28. 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 5/151:00 pmSTL - AUS
3 stops34h 03mMultiple Airlines
Sun 5/187:14 amAUS - STL
3 stops36h 56mMultiple Airlines
Deal found 4/28$393
This Alaska Airlines deal was found by Cheapflights users on 4/28. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/276:22 pmSTL - AUS
2 stops22h 13mAlaska Airlines
Thu 5/297:28 amAUS - STL
2 stops16h 36mAlaska Airlines
Deal found 4/28$583

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 April 29, 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 6/3

9:36 am-5:12 pm

1 stop7h 36m

Austin Bergstrom

Tue 6/3

6:52 pm-10:45 pm

1 stop3h 53m

$203

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Tue 5/27

11:32 am-5:13 pm

1 stop5h 41m

Austin Bergstrom

Thu 5/29

6:40 am-3:00 pm

1 stop8h 20m

$209

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Tue 5/27

5:20 pm-7:25 pm

Nonstop2h 05m

Austin Bergstrom

Thu 5/29

5:00 am-7:05 am

Nonstop2h 05m

$211

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Sat 5/3

8:15 pm-12:05 pm

1 stop15h 50m

Austin Bergstrom

Mon 5/5

10:32 am-12:06 am

1 stop13h 34m

$218

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Wed 5/21

6:00 am-1:01 pm

1 stop7h 01m

Austin Bergstrom

Sun 5/25

5:00 am-3:30 pm

2 stops10h 30m

$324

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Thu 5/15

1:00 pm-11:03 pm

3 stops34h 03m

Austin Bergstrom

Sun 5/18

7:14 am-8:10 pm

3 stops36h 56m

$393

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Tue 5/27

6:22 pm-4:35 pm

2 stops22h 13m

Austin Bergstrom

Thu 5/29

7:28 am-12:04 am

2 stops16h 36m

$583

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Sun 5/25

8:55 pm-11:00 pm

Nonstop2h 05m

$100

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Tue 5/27

6:00 am-1:08 pm

1 stop7h 08m

$105

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Sat 5/3

8:15 pm-11:20 pm

1 stop27h 05m

$110

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/28

Showing 1-10 of 15 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 April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*2 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightnetworkPrice Accuracy-Trust Score*3 stars
MytripPrice Accuracy3 starsTrust Score*3 stars
GotogatePrice Accuracy3 starsTrust Score*2 stars
PricelinePrice Accuracy2 starsTrust 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 Mytrip to be most consistent on Cheapflights vs. Mytrip Users can find the same prices on St. Louis-Austin flight deals on Cheapflights vs. Mytrip >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 Mytrip the most. Mytrip 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 April 25, 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, 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 April 29, 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 5% 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 March 30, 2025.

Travelers seeking maximum savings on their St. Louis to Austin flight should consider departing on Monday afternoons 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 April 29, 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
9,961 reviews

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.1

Comfort

7.9

Entertainment

7.1

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
9,961 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.1

Comfort

7.9

Entertainment

7.1

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
4,295 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.1

Comfort

7.9

Entertainment

7.1

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
7,929 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.1

Comfort

7.9

Entertainment

7.1

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
8,696 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.1

Comfort

7.9

Entertainment

7.1

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
9,961 reviews

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.1

Comfort

7.9

Entertainment

7.1

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 2 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, American Airlines ($203), Delta ($209), and Southwest ($211) offers the cheapest pricing from St. Louis to Austin. Users have found that American Airlines is 35% 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 Southwest ($100), Delta ($105), and Frontier ($110).

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

    While on average a flight from St. Louis to Austin is generally $344, 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 $199 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
Round Rock
Dripping Springs
Cedar Park
Pflugerville
Bastrop
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 April 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$135Average$198FlexibilityNo cancel feeOn-time62%
DeltaCheapest$196Average$263FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$212Average$303FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$216Average$340FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$244Average$347FlexibilityNo cancel feeOn-time69%

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