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

The Lambert-St Louis to Austin Bergstrom flight path was viewed by 9 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 05m. Fly via Southwest to get the fastest option. The distance between St. Louis and Austin is about 722 mi. All flights are typically nonstop.

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

According to our current data, Delta ($98), Frontier ($135), and American Airlines ($186) offers the cheapest pricing from St. Louis to Austin. Users have found that Delta is 67% cheaper than the other options available to this destination.

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.

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).

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

While on average a flight from St. Louis to Austin is generally $258, our data shows the cheapest flight currently is $154. When looking at the most popular route, (Lambert-St Louis - Austin Bergstrom), you can expect to pay $171 for that flight.

What are the most popular airlines that fly from St. Louis to Austin?

The most popular airlines flying from St. Louis to Austin are American Airlines, Delta and Frontier. Something to consider prior to booking your flight.

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

Users have found that flying from St. Louis to Austin on a Saturday typically leans towards higher prices. However, this doesn’t mean you still can’t find a deal. Flexibility with other aspects of your flight can still land a great price for your trip.

How far in advance should I book a flight from St. Louis to Austin?

Travelers have found it’s best to book a flight 37 days in advance to save up to 91% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 37 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from St. Louis to Austin 1-2 weeks in advance for as low as $377, or $377 for flights within the next 24 hours.

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

September is one of the best times of the year to fly to Austin from St. Louis. Prices for September average $306 per person but you can even find prices for as low as $151. The most expensive prices can be found in the month of October. Opting for a September flight can save you 17% on your journey compared to booking in October

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 is 1 flight from Lambert-St Louis to Austin per day from 5 airlines.

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.

$79+ Flights from St. Louis to Austin

Home Search by date Vacation packages Hotels Flight deals Car rental Travel tips & news

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 Thursday and return on a Tuesday

Cheap flight deals from St. Louis to Austin

Round-trip from	$159 (Priceline)
One-way from	$79 (Priceline)
Popular in	October
Cheapest in	September
Average price	$236
Good round-trip deal	$198 or less
Good one-way deal	$209 or less

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, 2% potential price rise

Search Deals

Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in September 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

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 September 11, 2025.

Fri 10/318:40 pmSTL - AUS

1 stop27h 52mFrontier

Mon 11/36:00 amAUS - STL

1 stop27h 07mFrontier

Deal found 9/10

$164

Tue 10/75:40 pmSTL - AUS

Nonstop2h 05mSouthwest

Tue 10/2112:05 pmAUS - STL

Nonstop2h 05mSouthwest

Deal found 9/10

$171

Mon 11/38:25 pmSTL - AUS

Nonstop2h 10mSouthwest

Wed 11/52:05 pmAUS - STL

1 stop3h 20mSouthwest

Deal found 9/10

$178

Fri 10/1011:32 amSTL - AUS

1 stop5h 24mFrontier

Fri 10/1710:47 pmAUS - STL

1 stop10h 20mFrontier

Deal found 9/10

$179

Tue 9/237:55 pmSTL - AUS

1 stop25h 03mFrontier

Fri 9/2610:59 pmAUS - STL

1 stop17h 04mFrontier

Deal found 9/10

$180

Tue 10/77:00 amSTL - AUS

1 stop4h 22mAmerican Airlines

Tue 10/215:00 amAUS - STL

1 stop3h 53mAmerican Airlines

Deal found 9/10

$181

Fri 9/262:38 pmSTL - AUS

1 stop7h 31mFrontier

Sun 9/289:23 pmAUS - STL

1 stop11h 43mFrontier

Deal found 9/10

$183

Thu 10/2310:20 pmSTL - AUS

Nonstop2h 00mSouthwest

Mon 10/275:05 amAUS - STL

Nonstop2h 00mSouthwest

Deal found 9/10

$184

Thu 9/257:55 pmSTL - AUS

2 stops15h 49mFrontier

Mon 9/299:23 pmAUS - STL

1 stop11h 43mFrontier

Deal found 9/10

$186

Tue 9/305:18 amSTL - AUS

1 stop4h 01mAmerican Airlines

Fri 10/34:35 pmAUS - STL

1 stop6h 32mAmerican Airlines

Deal found 9/11

$189

Thu 10/165:00 amSTL - AUS

1 stop6h 42mUnited Airlines

Thu 10/166:10 pmAUS - STL

1 stop5h 48mUnited Airlines

Deal found 9/10

$192

Best flights from St. Louis to Austin
Discover carefully curated flight deals from St. Louis to Austin that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 11, 2025.

Tue 10/75:40 pmSTL - AUS

Nonstop2h 05mSouthwest

Tue 10/2112:05 pmAUS - STL

Nonstop2h 05mSouthwest

Deal found 9/10

$171

Tue 10/284:45 pmSTL - AUS

1 stop6h 10mDelta

Sun 11/25:40 amAUS - STL

1 stop4h 51mDelta

Deal found 9/11

$197

Thu 10/910:57 amSTL - AUS

1 stop23h 28mMultiple Airlines

Thu 10/164:48 pmAUS - STL

1 stop16h 19mMultiple Airlines

Deal found 9/11

$202

Thu 10/910:20 pmSTL - AUS

Nonstop2h 00mSouthwest

Thu 10/165:05 amAUS - STL

Nonstop2h 00mSouthwest

Deal found 9/11

$184

Mon 10/67:05 amSTL - AUS

1 stop5h 30mDelta

Fri 10/106:12 pmAUS - STL

1 stop4h 55mDelta

Deal found 9/10

$197

Thu 10/2310:20 pmSTL - AUS

Nonstop2h 00mSouthwest

Mon 10/275:05 amAUS - STL

Nonstop2h 00mSouthwest

Deal found 9/11

$184

Thu 10/236:00 amSTL - AUS

1 stop5h 05mDelta

Mon 10/276:27 pmAUS - STL

1 stop5h 14mDelta

Deal found 9/9

$197

Thu 10/910:20 pmSTL - AUS

Nonstop2h 00mSouthwest

Mon 10/135:05 amAUS - STL

Nonstop2h 00mSouthwest

Deal found 9/10

$193

Fri 10/314:45 pmSTL - AUS

1 stop6h 10mDelta

Sun 11/25:40 amAUS - STL

1 stop4h 51mDelta

Deal found 9/11

$197

Last-minute flights from St. Louis to Austin
Discover last-minute flight deals from St. Louis to Austin. Data last updated September 11, 2025 and is based on user searches.

Tue 9/237:55 pmSTL - AUS

1 stop25h 03mFrontier

Fri 9/2610:59 pmAUS - STL

1 stop17h 04mFrontier

Deal found 9/10

$180

Thu 9/257:55 pmSTL - AUS

2 stops15h 49mFrontier

Mon 9/299:23 pmAUS - STL

1 stop11h 43mFrontier

Deal found 9/10

$186

Fri 9/262:38 pmSTL - AUS

1 stop7h 31mFrontier

Sun 9/289:23 pmAUS - STL

1 stop11h 43mFrontier

Deal found 9/10

$183

Tue 9/305:18 amSTL - AUS

1 stop4h 01mAmerican Airlines

Fri 10/34:35 pmAUS - STL

1 stop6h 32mAmerican Airlines

Deal found 9/11

$189

Tue 10/75:40 pmSTL - AUS

Nonstop2h 05mSouthwest

Tue 10/2112:05 pmAUS - STL

Nonstop2h 05mSouthwest

Deal found 9/10

$171

Tue 10/77:00 amSTL - AUS

1 stop4h 22mAmerican Airlines

Tue 10/215:00 amAUS - STL

1 stop3h 53mAmerican Airlines

Deal found 9/10

$181

Thu 10/910:20 pmSTL - AUS

Nonstop2h 00mSouthwest

Mon 10/135:05 amAUS - STL

Nonstop2h 00mSouthwest

Deal found 9/10

$193

Fri 10/1011:32 amSTL - AUS

1 stop5h 24mFrontier

Fri 10/1710:47 pmAUS - STL

1 stop10h 20mFrontier

Deal found 9/10

$179

Thu 10/165:00 amSTL - AUS

1 stop6h 42mUnited Airlines

Thu 10/166:10 pmAUS - STL

1 stop5h 48mUnited Airlines

Deal found 9/10

$192

Thu 10/2310:20 pmSTL - AUS

Nonstop2h 00mSouthwest

Mon 10/275:05 amAUS - STL

Nonstop2h 00mSouthwest

Deal found 9/11

$184

Fri 10/318:40 pmSTL - AUS

1 stop27h 52mFrontier

Mon 11/36:00 amAUS - STL

1 stop27h 07mFrontier

Deal found 9/10

$164

One-way flights from St. Louis to Austin
Search for one-way flight options from St. Louis to Austin. Find affordable one-way fares based on user searches. Data last updated September 11, 2025.

Thu 10/3011:07 amSTL - AUS

1 stop5h 54mFrontier

Deal found 9/10

$79

Thu 10/2310:57 amSTL - AUS

1 stop6h 02mSpirit Airlines

Deal found 9/10

$80

Sun 11/167:45 pmSTL - AUS

1 stop13h 57mFrontier

Deal found 9/11

$83

Sun 11/911:17 amSTL - AUS

1 stop5h 47mFrontier

Deal found 9/10

$84

Sun 11/210:57 amSTL - AUS

1 stop6h 02mSpirit Airlines

Deal found 9/10

$85

Wed 10/2910:25 amSTL - AUS

1 stop3h 20mSouthwest

Deal found 9/11

$86

Sat 10/187:00 amSTL - AUS

1 stop6h 23mAmerican Airlines

Deal found 9/10

$91

Thu 11/1310:55 pmSTL - AUS

Nonstop2h 10mSouthwest

Deal found 9/11

$92

Thu 10/910:57 amSTL - AUS

1 stop6h 02mSpirit Airlines

Deal found 9/10

$93

Sun 10/2610:57 amSTL - AUS

1 stop6h 02mSpirit Airlines

Deal found 9/10

$95

Tue 11/1110:15 amSTL - AUS

2 stops4h 50mSouthwest

Deal found 9/11

$96

Sat 10/117:15 pmSTL - AUS

1 stop20h 09mSpirit Airlines

Deal found 9/10

$98

Fly from

Fly to

Route

Depart

Return

Price

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Tue 10/7

5:40 pm-7:45 pm

Nonstop2h 05m

Austin Bergstrom

Tue 10/21

12:05 pm-2:10 pm

Nonstop2h 05m

$171

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Thu 10/9

10:20 pm-12:20 am

Nonstop2h 00m

Austin Bergstrom

Thu 10/16

5:05 am-7:05 am

Nonstop2h 00m

$184

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Thu 10/23

10:20 pm-12:20 am

Nonstop2h 00m

Austin Bergstrom

Mon 10/27

5:05 am-7:05 am

Nonstop2h 00m

$184

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Thu 10/9

10:20 pm-12:20 am

Nonstop2h 00m

Austin Bergstrom

Mon 10/13

5:05 am-7:05 am

Nonstop2h 00m

$193

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Tue 10/28

4:45 pm-10:55 pm

1 stop6h 10m

Austin Bergstrom

Sun 11/2

5:40 am-10:31 am

1 stop4h 51m

$197

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Mon 10/6

7:05 am-12:35 pm

1 stop5h 30m

Austin Bergstrom

Fri 10/10

6:12 pm-11:07 pm

1 stop4h 55m

$197

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Thu 10/23

6:00 am-11:05 am

1 stop5h 05m

Austin Bergstrom

Mon 10/27

6:27 pm-11:41 pm

1 stop5h 14m

$197

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Fri 10/31

4:45 pm-10:55 pm

1 stop6h 10m

Austin Bergstrom

Sun 11/2

5:40 am-10:31 am

1 stop4h 51m

$197

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Thu 10/9

10:57 am-10:25 am

1 stop23h 28m

Austin Bergstrom

Thu 10/16

4:48 pm-9:07 am

1 stop16h 19m

$202

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Sat 2/7

2:48 pm-11:12 pm

1 stop8h 24m

$80

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Showing 1-10 of 20 results

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?

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, August is the cheapest month in which you can book a flight from St. Louis to Austin (average of $285). 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?

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 5% versus a flight in the afternoon.

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

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.

Reviews of airlines servicing Austin

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

4,248 reviews

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

4,248 reviews

Southwest

8.0

Very good

4,248 reviews

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

8.0

Very good

7,960 reviews

Southwest

8.0

Very good

4,248 reviews

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

8,937 reviews

Southwest

8.0

Very good

4,248 reviews

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

10,000 reviews

Southwest

8.0

Very good

4,248 reviews

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

3,177 reviews

Southwest

8.0

Very good

4,248 reviews

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

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 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 9 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 05m. Fly via Southwest to get the fastest option. The distance between St. Louis and Austin is about 722 mi. All flights are typically nonstop.
What are the cheapest airlines flying from St. Louis to Austin round-trip?
According to our current data, Delta ($98), Frontier ($135), and American Airlines ($186) offers the cheapest pricing from St. Louis to Austin. Users have found that Delta is 67% cheaper than the other options available to this destination.
What are the cheapest flights from St. Louis to Austin?
While on average a flight from St. Louis to Austin is generally $258, our data shows the cheapest flight currently is $154. When looking at the most popular route, (Lambert-St Louis - Austin Bergstrom), you can expect to pay $171 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, August is the cheapest month in which you can book a flight from St. Louis to Austin (average of $285). 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

San Marcos

Round Rock

Fredericksburg

Pflugerville

Dripping Springs

Georgetown

Cedar Park

Canyon Lake

Seguin

Horseshoe Bay

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for St. Louis to Austin

St. Louis to Dallas/Fort Worth flights

St. Louis to Hobby flights

Kansas City to Dallas/Fort Worth flights

Kansas City to Hobby flights

St. Louis to George Bush Intcntl flights

Kansas City to George Bush Intcntl flights

Kansas City to Austin flights

Kansas City to Love Field flights

St. Louis to Love Field flights

Kansas City to San Antonio flights

Springfield to Dallas/Fort Worth flights

Springfield to Hobby flights

St. Louis to San Antonio flights

Springfield to George Bush Intcntl flights

Columbia to Dallas/Fort Worth flights

St. Louis to El Paso flights

Springfield to Austin flights

Springfield to San Antonio flights

Kansas City to El Paso flights

St. Louis to McAllen flights

Springfield to Love Field flights

Kansas City to Brownsville flights

Kansas City to Lubbock flights

Kansas City to Harlingen flights

St. Louis to Midland flights

Joplin to George Bush Intcntl flights

St. Louis to Harlingen flights

Kansas City to Corpus Christi flights

Joplin to Dallas/Fort Worth flights

Kansas City to McAllen flights

St. Louis to Brownsville flights

Columbia to Austin flights

St. Louis to Lubbock flights

Columbia to Hobby flights

Kansas City to Amarillo flights

St. Louis to Corpus Christi flights

Kansas City to Beaumont flights

Springfield to El Paso flights

Springfield to McAllen flights

Columbia to George Bush Intcntl flights

St. Louis to Waco flights

St. Louis to Killeen flights

Kansas City to Killeen flights

Springfield to Corpus Christi flights

St. Louis to Amarillo flights

Joplin to Austin flights

Columbia to San Antonio flights

Springfield to Texarkana flights

St. Louis to Abilene flights

Other flights to Austin

Complete your trip

Austin car rentals

Austin Bergstrom Airport car rentals

San Antonio Airport car rentals

Killeen Fort Hood Regional Airport car rentals

Waco Airport car rentals

College Station Easterwood Field Airport car rentals

Houston car rentals

Dallas car rentals

San Antonio car rentals

El Paso car rentals

Lubbock car rentals

Killeen car rentals

Top 5 airlines flying from St. Louis to Austin

Airline	Cheapest	Average	Flexibility	On-time
Delta	Cheapest$98	Average$243	FlexibilityNo cancel fee	On-timeN/A
Frontier	Cheapest$135	Average$234	FlexibilityNo cancel fee	On-time62%
American Airlines	Cheapest$186	Average$304	FlexibilityNo cancel fee	On-time71%
Southwest	Cheapest$208	Average$333	FlexibilityNo cancel fee	On-time63%
United Airlines	Cheapest$224	Average$360	FlexibilityNo cancel fee	On-time69%

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.

$79+ 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 10/30. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from St. Louis to Austin with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

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 Thursday and return on a Tuesday

Cheap flight deals from St. Louis to Austin

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find flight deals from St. Louis to Austin

Cheapest flights from St. Louis to AustinExplore 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 September 11, 2025.

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 September 11, 2025.

Cheapflights Fare Finder

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

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.

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?

What is the cheapest month to book a flight from St. Louis to Austin?

What is the cheapest time of day to fly from STL to AUS?

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

Reviews of airlines servicing Austin

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.

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?

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

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

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

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

Can I find deals for flights from St. Louis to Austin that include hotel bookings?

How can I find direct flights from St. Louis to Austin?

Can I find deals for business class flights from St. Louis to Austin?

What is the cheapest month to book a flight from St. Louis to Austin?

Traveling to a place near Austin?

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.

Top 5 airlines flying from St. Louis to Austin

100% Free

Book with Flexibility

Travel Smart

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 September 11, 2025.