Which airport is the most popular layover for flights between St. Louis and Austin?

Dallas (DFW) was the most common stop: 80% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport offers the lowest fares from St. Louis to Austin?

Flights via Atlanta (ATL) offer the lowest average round-trip price of $196.

What is the cheapest airline that flies from Lambert-St Louis to Austin Bergstrom?

Frontier, Spirit Airlines, and Southwest are the most popular carriers operating from Lambert-St Louis to Austin Bergstrom

How many flights depart from St. Louis to Austin on average per week?

As of October 2025, there are 3 flights per week flying from St. Louis to Austin. The most common day of the week flights depart is Thu, with 100% of flights taking off on this day.

Which layover airport has the shortest travel time from St. Louis to Austin?

Flights connecting via Dallas (DFW) have the shortest average one-way travel time: 4h 24m.

What airlines fly to Austin?

Southwest, American Airlines and United Airlines are the top three most popular airlines that fly to Austin from St. Louis according to our data. Southwest is the first choice among our users, with 61% of people opting to fly with this airline when traveling to Austin. Keep in mind that there are 5 different airlines that fly to Austin on a routine basis, so you have a few additional options to choose from.

Which layover airport has the shortest connection time from St. Louis to Austin?

Dallas (DFW) has the shortest average layover time for this route: 1h 02m.

When did momondo last update prices for flights from Lambert-St Louis Airport to Austin Bergstrom Airport?

Prices for flights from Lambert-St Louis Airport to Austin Bergstrom Airport refresh daily.

How many operators does momondo search for flights from Lambert-St Louis Airport to Austin Bergstrom Airport?

There are 5 operators available for flights from Lambert-St Louis Airport to Austin Bergstrom Airport as of October 2025.

How old do you have to be to fly from Lambert-St Louis Airport to Austin Bergstrom Airport?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Lambert-St Louis Airport to Austin Bergstrom Airport.

What documentation or ID do you need to fly to Austin Bergstrom Airport?

The travel and health documents required for your trip to Austin Bergstrom Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Austin Bergstrom Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$55 Cheap Flights from St. Louis to Austin in 2025/26

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Find the cheapest flights from St. Louis to Austin

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

12:07 pm - 8:00 pmSTL-AUS

7h 53m1 stop

6:55 am - 10:14 amAUS-STL

27h 19m1 stop

$119Frontier

Find Deal

lun., dic. 8 - jue., dic. 11

12:07 pm - 8:00 pmSTL-AUS

7h 53m1 stop

10:22 pm - 12:12 pmAUS-STL

13h 50m1 stop

$127Frontier

Find Deal

lun., dic. 8 - dom., dic. 14

2:12 pm - 4:45 pmSTL-AUS

26h 33m1 stop

10:37 am - 9:07 amAUS-STL

22h 30m1 stop

$139Frontier

Find Deal

jue., nov. 13 - lun., nov. 17

12:20 pm - 11:12 pmSTL-AUS

10h 52m1 stop

6:45 am - 10:02 amAUS-STL

27h 17m1 stop

$160Multiple Airlines

Find Deal

jue., ene. 22 - dom., ene. 25

7:43 pm - 9:30 amSTL-AUS

13h 47m2 stops

8:48 pm - 10:33 pmAUS-STL

25h 45m1 stop

$164Multiple Airlines

Find Deal

vie., ene. 30 - lun., feb. 2

7:02 pm - 12:28 amSTL-AUS

5h 26m1 stop

10:55 am - 4:06 pmAUS-STL

5h 11m1 stop

$207Delta

Find Deal

lun., dic. 8 - mar., dic. 9

3:19 pm - 10:59 pmSTL-AUS

7h 40m2 stops

5:30 am - 10:04 amAUS-STL

4h 34m1 stop

$212United Airlines

Find Deal

lun., dic. 8 - jue., dic. 11

6:00 am - 11:15 amSTL-AUS

5h 15m1 stop

5:00 pm - 9:57 pmAUS-STL

4h 57m1 stop

$217Delta

Find Deal

sáb., dic. 6 - mié., dic. 10

5:05 am - 11:05 amSTL-AUS

6h 00m1 stop

5:05 am - 7:10 amAUS-STL

2h 05mnonstop

$218Southwest

Find Deal

dom., dic. 14 - jue., dic. 18

2:55 pm - 5:05 pmSTL-AUS

2h 10mnonstop

5:05 am - 7:10 amAUS-STL

2h 05mnonstop

$223Southwest

Find Deal

dom., dic. 14 - jue., dic. 18

Frontier flights from St. Louis to Austin

Our best Frontier deals on St. Louis to Austin flight tickets

Frontier

Dec 8

STL12:07 pmLambert-St Louis

7h 53m

1 stop

AUS8:00 pmAustin Bergstrom

Dec 11

AUS6:55 amAustin Bergstrom

27h 19m

1 stop

STL10:14 amLambert-St Louis

$119

Find similar

Frontier

Dec 8

STL12:07 pmLambert-St Louis

7h 53m

1 stop

AUS8:00 pmAustin Bergstrom

Dec 14

AUS10:22 pmAustin Bergstrom

13h 50m

1 stop

STL12:12 pmLambert-St Louis

$127

Find similar

Frontier

Nov 13

STL11:07 amLambert-St Louis

5h 54m

1 stop

AUS5:01 pmAustin Bergstrom

Nov 17

AUS10:37 amAustin Bergstrom

22h 30m

1 stop

STL9:07 amLambert-St Louis

$136

Find similar

Southwest flights from St. Louis to Austin

Our best Southwest deals on St. Louis to Austin flight tickets

Southwest

Dec 14

STL5:05 amLambert-St Louis

6h 00m

1 stop

AUS11:05 amAustin Bergstrom

Dec 18

AUS5:05 amAustin Bergstrom

2h 05m

STL7:10 amLambert-St Louis

$218

Find similar

Southwest

Dec 14

STL2:55 pmLambert-St Louis

2h 10m

AUS5:05 pmAustin Bergstrom

Dec 18

AUS5:05 amAustin Bergstrom

2h 05m

STL7:10 amLambert-St Louis

$223

Find similar

Southwest

Jan 22

STL10:25 amLambert-St Louis

2h 20m

AUS12:45 pmAustin Bergstrom

Jan 25

AUS5:00 pmAustin Bergstrom

5h 35m

1 stop

STL10:35 pmLambert-St Louis

$233

Find similar

Fly from

Fly to

Route

Depart

Return

Price

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

lun. 12/8

12:07 pm-8:00 pm

1 stop7h 53m

Austin Bergstrom

jue. 12/11

6:55 am-10:14 am

1 stop27h 19m

$119

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

lun. 12/8

12:07 pm-8:00 pm

1 stop7h 53m

Austin Bergstrom

dom. 12/14

10:22 pm-12:12 pm

1 stop13h 50m

$127

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

jue. 11/13

2:12 pm-4:45 pm

1 stop26h 33m

Austin Bergstrom

lun. 11/17

10:37 am-9:07 am

1 stop22h 30m

$139

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

jue. 1/22

12:20 pm-11:12 pm

1 stop10h 52m

Austin Bergstrom

dom. 1/25

6:45 am-10:02 am

1 stop27h 17m

$160

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

vie. 1/30

7:43 pm-9:30 am

2 stops13h 47m

Austin Bergstrom

lun. 2/2

8:48 pm-10:33 pm

1 stop25h 45m

$164

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

lun. 12/8

7:02 pm-12:28 am

1 stop5h 26m

Austin Bergstrom

mar. 12/9

10:55 am-4:06 pm

1 stop5h 11m

$207

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

lun. 12/8

3:19 pm-10:59 pm

2 stops7h 40m

Austin Bergstrom

jue. 12/11

5:30 am-10:04 am

1 stop4h 34m

$212

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

sáb. 12/6

6:00 am-11:15 am

1 stop5h 15m

Austin Bergstrom

mié. 12/10

5:00 pm-9:57 pm

1 stop4h 57m

$217

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

dom. 12/14

5:05 am-11:05 am

1 stop6h 00m

Austin Bergstrom

jue. 12/18

5:05 am-7:10 am

Nonstop2h 05m

$218

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

dom. 12/14

2:55 pm-5:05 pm

Nonstop2h 10m

Austin Bergstrom

jue. 12/18

5:05 am-7:10 am

Nonstop2h 05m

$223

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from St. Louis to Austin

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Layovers

Other information

What is the cheapest month to fly to Austin?

The cheapest month to fly to Austin from St. Louis is in September. Flight prices, which tend to average around $227, are often lower during this time because this is during the off-season. If you’re not able to fly to Austin in September, then August is your next best option. Flight prices from St. Louis to Austin during August average around $252.

What is the cheapest day to depart on your flight to Austin?

The cheapest day to depart on your flight to Austin is on a Tuesday when prices can be found for as low as $292. This is often the case because there is less demand to fly during this day of the week. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from St. Louis to Austin for around $405.

What is the cheapest time of day to depart on your flight to Austin?

In the evening is the cheapest time of day to fly from St. Louis to Austin when you can find flight prices for as low as $331. Flying to Austin in the evening is an ideal time because this is during off-peak travel hours. Flights to Austin are more costly in the afternoon, with an average ticket price of $363. Departure times in the afternoon fall within the peak daily travel times, which is why tickets can be more expensive.

What is the cheapest Lambert-St Louis to Austin Bergstrom flight route?

Fly from Lambert-St Louis to Austin Bergstrom for the best Lambert-St Louis - Austin Bergstrom flight prices

How far in advance should I book a flight to Austin?

You are more likely to see cheaper flights to Austin from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Austin for around $311 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Austin from St. Louis for as low as $264 on momondo.

What cabin class options are available on Lambert-St Louis to Austin Bergstrom flights?

There is only 1 cabin class available to choose from on Lambert-St Louis to Austin Bergstrom flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

How have St. Louis to Austin flight prices changed over time?

As of October 2025, prices for St. Louis to Austin flights are approximately 106% more expensive when compared to flights at the same time last year.

When to book flights from St. Louis to Austin

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Austin according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap St. Louis to Austin (STL to AUS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Austin

Best Price Found	$189
Fastest flight time	2h 10m
Direct flights	Every day
Airports in Austin	1 airport

The best one-way flight to Austin from St. Louis in the past 72 hours is $189. The best round-trip flight deal from St. Louis to Austin found on momondo in the last 72 hours is $273.

The fastest flight from St. Louis to Austin takes 2h 10m

Direct flights go from St. Louis to Austin every day.

There is 1 airport near Austin: Austin Bergstrom (AUS)

Search flight deals

How far is Lambert-St Louis to Austin Bergstrom by plane?
The straight-line distance from Lambert-St Louis to Austin Bergstrom is 718.3 mi. Flights usually cover this in 2h 10m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from Lambert-St Louis Airport to Austin Bergstrom Airport?
Prices for flights from Lambert-St Louis Airport to Austin Bergstrom Airport refresh daily.
How many operators does momondo search for flights from Lambert-St Louis Airport to Austin Bergstrom Airport?
There are 5 operators available for flights from Lambert-St Louis Airport to Austin Bergstrom Airport as of October 2025.
How old do you have to be to fly from Lambert-St Louis Airport to Austin Bergstrom Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Lambert-St Louis Airport to Austin Bergstrom Airport.
What documentation or ID do you need to fly to Austin Bergstrom Airport?
The travel and health documents required for your trip to Austin Bergstrom Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Austin Bergstrom Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular plane model from St. Louis to Austin?
Based on momondo bookings for flights between St. Louis and Austin, the leading plane model is Boeing 737 MAX 8, making up 29.95% of the total bookings. Other popular models include Boeing 737-700 Passenger/BBJ1 (winglets) with 24.37%, Boeing 737-800 Passenger/BBJ2 (winglets) with 23.86%, and Airbus A320-100/200 with 3.55%.
What is the most popular airline from St. Louis to Austin?
Based on momondo bookings for flights between St. Louis and Austin, the leading airline is Southwest, making up 75% of the total bookings. Other popular airlines include American Airlines with 16%, United Airlines with 4%, and Delta with 3%.

Best airlines flying from St. Louis to Austin

Compare and see reviews for airlines that fly from St. Louis to Austin with momondo

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom $98	Free Cancellation	Rating 7.9 7,998 reviews	Search Delta flights
Frontier	PriceFrom $135	Free Cancellation	Rating 5.8 3,122 reviews	Search Frontier flights
United Airlines	PriceFrom $167	Free Cancellation	Rating 7.4 8,998 reviews	Search United Airlines flights
American Airlines	PriceFrom $183	Free Cancellation	Rating 7.2 11,035 reviews	Search American Airlines flights
Southwest	PriceFrom $199	Free Cancellation	Rating 8.0 4,243 reviews	Search Southwest flights

Southwest Flights From St. Louis to Austin
Southwest flight deals from St. Louis to Austin start from $199 round-trip. Over the 3 Southwest flights for this route in a normal week, average airfare is usually $332 round-trip - but some users have found much cheaper deals with momondo.

Fredericksburg

Wimberley

San Marcos

Round Rock

Georgetown

Canyon Lake

Marble Falls

Cedar Park

Horseshoe Bay

Dripping Springs

Seguin

Kyle

Pflugerville

Bastrop

Buda

Flatonia

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Austin?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Austin from St. Louis.

Can I find flights from St. Louis to Austin with flexible booking policies on momondo?

momondo does allow users to show only those flights to Austin from St. Louis which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from St. Louis to Austin?

momondo helps you find the best flight between St. Louis and Austin by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from St. Louis to Austin right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of St. Louis to Austin flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

An easier way to manage your Austin trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Start using Trips

Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

1 adult

sáb. 11/29

sáb. 12/6

Email me momondo's favorite deals

By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States

Airports servicing Texas

Popular cities in the United States

Flights to New Yorkfrom $49

Flights to Los Angelesfrom $47

Flights to Miamifrom $47

Flights to Chicagofrom $49

Flights to Orlandofrom $47

Flights to Las Vegasfrom $39

Flights to San Franciscofrom $39

Flights to Washington, D.C.from $40

Flights to Bostonfrom $60

Flights to Atlantafrom $47

Flights to Dallasfrom $49

Flights to Seattlefrom $53

Cheap flights from St. Louis to Austin from $55

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Austin departing on 12/8. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

Find the cheapest flights from St. Louis to Austin

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

Cheap direct flights

Frontier flights from St. Louis to Austin

Our best Frontier deals on St. Louis to Austin flight tickets

Southwest flights from St. Louis to Austin

Our best Southwest deals on St. Louis to Austin flight tickets

momondo Fare Finder

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

See travel insights to Austin from

How to get the cheapest flight ticket from St. Louis to Austin

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Austin?

What is the cheapest day to depart on your flight to Austin?

What is the cheapest time of day to depart on your flight to Austin?

What is the cheapest Lambert-St Louis to Austin Bergstrom flight route?

Fly from Lambert-St Louis to Austin Bergstrom for the best Lambert-St Louis - Austin Bergstrom flight prices

How far in advance should I book a flight to Austin?

What cabin class options are available on Lambert-St Louis to Austin Bergstrom flights?

There is only 1 cabin class available to choose from on Lambert-St Louis to Austin Bergstrom flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

How have St. Louis to Austin flight prices changed over time?

As of October 2025, prices for St. Louis to Austin flights are approximately 106% more expensive when compared to flights at the same time last year.

What is the cheapest airline that flies from Lambert-St Louis to Austin Bergstrom?

Frontier, Spirit Airlines, and Southwest are the most popular carriers operating from Lambert-St Louis to Austin Bergstrom

What airlines fly to Austin?

Which airport is the most popular layover for flights between St. Louis and Austin?

Dallas (DFW) was the most common stop: 80% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport offers the lowest fares from St. Louis to Austin?

Flights via Atlanta (ATL) offer the lowest average round-trip price of $196.

Which layover airport has the shortest travel time from St. Louis to Austin?

Flights connecting via Dallas (DFW) have the shortest average one-way travel time: 4h 24m.

Which layover airport has the shortest connection time from St. Louis to Austin?

Dallas (DFW) has the shortest average layover time for this route: 1h 02m.

How many flights depart from St. Louis to Austin on average per week?

As of October 2025, there are 3 flights per week flying from St. Louis to Austin. The most common day of the week flights depart is Thu, with 100% of flights taking off on this day.

When to book flights from St. Louis to Austin

Cheap St. Louis to Austin (STL to AUS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Austin

Best Price Found

Fastest flight time

Direct flights

Airports in Austin

How far is Lambert-St Louis to Austin Bergstrom by plane?

When did momondo last update prices for flights from Lambert-St Louis Airport to Austin Bergstrom Airport?

How many operators does momondo search for flights from Lambert-St Louis Airport to Austin Bergstrom Airport?

How old do you have to be to fly from Lambert-St Louis Airport to Austin Bergstrom Airport?

What documentation or ID do you need to fly to Austin Bergstrom Airport?

What is the most popular plane model from St. Louis to Austin?

What is the most popular airline from St. Louis to Austin?

Best airlines flying from St. Louis to Austin

Compare and see reviews for airlines that fly from St. Louis to Austin with momondo

Southwest Flights From St. Louis to Austin

Traveling to a place near Austin?

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Austin?

Can I find flights from St. Louis to Austin with flexible booking policies on momondo?

How can momondo help me find flights from St. Louis to Austin?

I’m not ready to book a flight from St. Louis to Austin right now. Can momondo alert me if prices change?

An easier way to manage your Austin trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to the United States

Airports servicing Texas