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Cheap flights from Austin to St. Louis from $64

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Austin to St. Louis departing on 2/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Austin to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
11:16 am - 10:23 am
AUS
-
STL
23h 07m1 stop
Frontier Logo
3:46 pm - 11:11 pm
STL
-
AUS
7h 25m1 stop
$142Frontier
Thu, Jan 29 - Sat, Jan 31
Frontier Logo
10:40 am - 2:46 pm
AUS
-
STL
28h 06m1 stop
Frontier Logo
7:39 pm - 11:11 pm
STL
-
AUS
27h 32m1 stop
$146Frontier
Tue, Jan 20 - Fri, Jan 23
Multiple Airlines Logo
8:12 pm - 2:48 pm
AUS
-
STL
18h 36m1 stop
Multiple Airlines Logo
5:42 pm - 4:04 pm
STL
-
AUS
22h 22m1 stop
$147Multiple Airlines
Fri, Jan 16 - Tue, Jan 20
Multiple Airlines Logo
5:52 pm - 10:34 pm
AUS
-
STL
28h 42m1 stop
Multiple Airlines Logo
5:11 pm - 4:04 pm
STL
-
AUS
22h 53m1 stop
$160Multiple Airlines
Mon, Jan 12 - Mon, Jan 19
Multiple Airlines Logo
7:25 am - 6:51 am
AUS
-
STL
23h 26m2 stops
Multiple Airlines Logo
7:39 pm - 11:11 pm
STL
-
AUS
27h 32m1 stop
$162Multiple Airlines
Tue, Jan 20 - Fri, Jan 23
Frontier Logo
11:16 am - 11:33 pm
AUS
-
STL
12h 17m1 stop
Frontier Logo
3:46 pm - 11:11 pm
STL
-
AUS
7h 25m1 stop
$163Frontier
Sat, Jan 31 - Sat, Feb 7
Multiple Airlines Logo
4:59 pm - 7:50 am
AUS
-
STL
14h 51m1 stop
Multiple Airlines Logo
5:11 pm - 4:04 pm
STL
-
AUS
22h 53m1 stop
$164Multiple Airlines
Thu, Jan 8 - Tue, Jan 13
Multiple Airlines Logo
8:12 pm - 2:48 pm
AUS
-
STL
18h 36m1 stop
Multiple Airlines Logo
5:42 pm - 9:35 pm
STL
-
AUS
27h 53m2 stops
$168Multiple Airlines
Fri, Jan 16 - Tue, Jan 20
Multiple Airlines Logo
6:05 pm - 7:50 am
AUS
-
STL
13h 45m2 stops
Multiple Airlines Logo
5:11 pm - 4:04 pm
STL
-
AUS
22h 53m1 stop
$169Multiple Airlines
Thu, Jan 8 - Tue, Jan 13
Multiple Airlines Logo
5:52 pm - 10:34 pm
AUS
-
STL
28h 42m1 stop
Multiple Airlines Logo
8:32 pm - 9:35 pm
STL
-
AUS
25h 03m2 stops
$170Multiple Airlines
Mon, Jan 12 - Mon, Jan 19

American Airlines flights from Austin to St. Louis

Our best American Airlines deals on Austin to St. Louis flight tickets
American Airlines
Dec 24
AUS3:24 pmAustin Bergstrom
3h 58m
1 stop
STL7:22 pmLambert-St Louis
Dec 25
STL7:00 amLambert-St Louis
11h 34m
1 stop
AUS6:34 pmAustin Bergstrom
$378
Find similar
American Airlines
Dec 21
AUS6:00 pmAustin Bergstrom
4h 56m
1 stop
STL10:56 pmLambert-St Louis
Dec 24
STL6:00 amLambert-St Louis
6h 57m
1 stop
AUS12:57 pmAustin Bergstrom
$483
Find similar
American Airlines
Dec 21
AUS1:26 pmAustin Bergstrom
5h 56m
1 stop
STL7:22 pmLambert-St Louis
Dec 24
STL6:00 amLambert-St Louis
9h 32m
2 stops
AUS3:32 pmAustin Bergstrom
$488
Find similar

Frontier flights from Austin to St. Louis

Our best Frontier deals on Austin to St. Louis flight tickets
Frontier
Jan 29
AUS11:16 amAustin Bergstrom
23h 07m
1 stop
STL10:23 amLambert-St Louis
Jan 31
STL3:46 pmLambert-St Louis
7h 25m
1 stop
AUS11:11 pmAustin Bergstrom
$142
Find similar
Frontier
Jan 20
AUS10:40 amAustin Bergstrom
28h 06m
1 stop
STL2:46 pmLambert-St Louis
Jan 23
STL7:39 pmLambert-St Louis
27h 32m
1 stop
AUS11:11 pmAustin Bergstrom
$146
Find similar
Frontier
Jan 31
AUS11:16 amAustin Bergstrom
12h 17m
1 stop
STL11:33 pmLambert-St Louis
Feb 7
STL3:46 pmLambert-St Louis
7h 25m
1 stop
AUS11:11 pmAustin Bergstrom
$163
Find similar

momondo 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, momondo users made 832,500 searches. Data last updated December 17, 2025.
Use the filters below to find and compare flights from Austin to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

AustinSt. Louis

AUS - STL

AUSSTL

Austin Bergstrom

Thu 1/29

11:16 am-10:23 am

1 stop23h 07m

Lambert-St Louis

Sat 1/31

3:46 pm-11:11 pm

1 stop7h 25m

$142

AustinSt. Louis

AUS - STL

AUSSTL

Austin Bergstrom

Tue 1/20

10:40 am-2:46 pm

1 stop28h 06m

Lambert-St Louis

Fri 1/23

7:39 pm-11:11 pm

1 stop27h 32m

$146

AustinSt. Louis

AUS - STL

AUSSTL

Austin Bergstrom

Fri 1/16

8:12 pm-2:48 pm

1 stop18h 36m

Lambert-St Louis

Tue 1/20

5:42 pm-4:04 pm

1 stop22h 22m

$147

AustinSt. Louis

AUS - STL

AUSSTL

Austin Bergstrom

Mon 1/12

5:52 pm-10:34 pm

1 stop28h 42m

Lambert-St Louis

Mon 1/19

5:11 pm-4:04 pm

1 stop22h 53m

$160

AustinSt. Louis

AUS - STL

AUSSTL

Austin Bergstrom

Tue 1/20

7:25 am-6:51 am

2 stops23h 26m

Lambert-St Louis

Fri 1/23

7:39 pm-11:11 pm

1 stop27h 32m

$162

AustinSt. Louis

AUS - STL

AUSSTL

Austin Bergstrom

Sat 1/31

11:16 am-11:33 pm

1 stop12h 17m

Lambert-St Louis

Sat 2/7

3:46 pm-11:11 pm

1 stop7h 25m

$163

AustinSt. Louis

AUS - STL

AUSSTL

Austin Bergstrom

Thu 1/8

4:59 pm-7:50 am

1 stop14h 51m

Lambert-St Louis

Tue 1/13

5:11 pm-4:04 pm

1 stop22h 53m

$164

AustinSt. Louis

AUS - STL

AUSSTL

Austin Bergstrom

Fri 1/16

8:12 pm-2:48 pm

1 stop18h 36m

Lambert-St Louis

Tue 1/20

5:42 pm-9:35 pm

2 stops27h 53m

$168

AustinSt. Louis

AUS - STL

AUSSTL

Austin Bergstrom

Thu 1/8

6:05 pm-7:50 am

2 stops13h 45m

Lambert-St Louis

Tue 1/13

5:11 pm-4:04 pm

1 stop22h 53m

$169

AustinSt. Louis

AUS - STL

AUSSTL

Austin Bergstrom

Mon 1/12

5:52 pm-10:34 pm

1 stop28h 42m

Lambert-St Louis

Mon 1/19

8:32 pm-9:35 pm

2 stops25h 03m

$170

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to St. Louis from

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

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 St. Louis?

In general, October is the cheapest month to fly from Austin to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $271. The month of January is another great option to travel to St. Louis, with average flight prices from Austin averaging around $287.

What is the cheapest day to depart on your flight to St. Louis?

The cheapest day to depart on your flight to St. Louis is on a Tuesday when prices can be found for as low as $313. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $468. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.

What is the cheapest time of day to depart on your flight to St. Louis?

Flying to St. Louis from Austin in the evening is the least expensive time of day to depart. momondo users have found prices as low as $238 when looking at flights departing in the evening. At noon is when there is more demand to fly to St. Louis, so prices are often more expensive at around $367 per ticket.

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

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

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

You are more likely to see cheaper flights to St. Louis from Austin when booking weeks ahead of your departure date. In general, you can expect to find flights to St. Louis for around $323 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to St. Louis from Austin for as low as $216 on momondo.

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

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

Can stopping save me money on Austin to St. Louis flights?

You could potentially save up to 8% on your flight if you consider stops on a Austin to St. Louis flight.

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

As of December 2025, prices for Austin to St. Louis flights are approximately 63% more expensive when compared to flights at the same time last year.

When to book flights from Austin to St. Louis

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

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

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

Best Price Found

$186

Fastest flight time

2h 00m

Direct flights

Every day

Airports in St. Louis

1 airport
The best one-way flight to St. Louis from Austin in the past 72 hours is $186. The best round-trip flight deal from Austin to St. Louis found on momondo in the last 72 hours is $316.
The fastest flight from Austin to St. Louis takes 2h 00m
Direct flights go from Austin to St. Louis every day.
There is 1 airport in St. Louis. From Austin there are direct flights to Lambert-St Louis (STL).
Search flight deals

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

    The distance between Austin Bergstrom and Lambert-St Louis is about 718.3 mi. Typically, this will take 2h 00m by plane in normal conditions.

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

    Prices for flights from Austin Bergstrom Airport to Lambert-St Louis Airport were last updated today.

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

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

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Austin Bergstrom Airport to Lambert-St Louis Airport.

  • What documentation or ID do you need to fly to Lambert-St Louis Airport?

    The required travel and health documents for your Lambert-St Louis Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Lambert-St Louis Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

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

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

Best airlines flying from Austin to St. Louis

Compare and see reviews for airlines that fly from Austin to St. Louis with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $195Free CancellationRating
5.8
3,082 reviews
Search Frontier flights
SouthwestPriceFrom $198Free CancellationRating
7.9
4,249 reviews
Search Southwest flights
American AirlinesPriceFrom $242Free CancellationRating
7.2
11,050 reviews
Search American Airlines flights

  • Southwest Flights From Austin to St. Louis

    Southwest flight deals from Austin to St. Louis start from $198 round-trip. Over the 12 Southwest flights for this route in a normal week, average airfare is usually $322 round-trip - but some users have found much cheaper deals with momondo.

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
St. Charles
Chesterfield
Hermann
Fairview Heights
Maryland Heights
O'Fallon
Florissant
Fenton
Wentzville
St. Peters
Collinsville
Alton
Clayton
Festus
Glencoe
Farmington
Eureka
Edwardsville
Litchfield
Shrewsbury

Why use momondo?

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

Finding the right flight to St. Louis from Austin is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to St. Louis quick and easy, saving you time and money.

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

Yes. momondo enables you to select and highlight flights to St. Louis from Austin with this policy.

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

momondo provides multiple filters to help you find the best flight to St. Louis from Austin. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Of course. momondo tracks the price of Austin to St. Louis 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 St. Louis 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.
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