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Cheap flights from St. Louis to Austin from $97

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 5/17. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from St. Louis to Austin

Cheap round-trip flights

These are some of the best round-trip flight deals from St. Louis to Austin that have been recently found on momondo from popular airlines, departing in the coming months.
6:51 pm - 12:58 pmSTL-AUS
18h 07m1 stop
9:42 am - 11:46 pmAUS-STL
14h 04m1 stop
$130Frontier
Find Deal
Sat, Apr 12 - Tue, Apr 15
5:41 pm - 7:01 pmSTL-AUS
25h 20m1 stop
4:29 pm - 10:01 amAUS-STL
17h 32m1 stop
$159Frontier
Find Deal
Wed, Apr 23 - Fri, Apr 25
5:20 pm - 7:25 pmSTL-AUS
2h 05mnonstop
4:15 pm - 6:20 pmAUS-STL
2h 05mnonstop
$197Southwest
Find Deal
Tue, Apr 8 - Wed, Apr 9
6:55 pm - 9:10 pmSTL-AUS
2h 15mnonstop
5:40 am - 10:00 amAUS-STL
4h 20m1 stop
$207Southwest
Find Deal
Mon, Apr 7 - Thu, Apr 10
8:00 am - 3:26 pmSTL-AUS
7h 26m2 stops
11:19 am - 4:36 pmAUS-STL
5h 17m1 stop
$242United Airlines
Find Deal
Wed, Apr 2 - Fri, Apr 4
6:15 am - 1:02 pmSTL-AUS
6h 47m1 stop
5:50 pm - 10:09 pmAUS-STL
4h 19m1 stop
$248United Airlines
Find Deal
Fri, Apr 11 - Fri, Apr 11
7:20 am - 12:45 pmSTL-AUS
5h 25m1 stop
6:45 am - 2:35 pmAUS-STL
7h 50m1 stop
$261Delta
Find Deal
Wed, Aug 27 - Tue, Sep 2
7:20 am - 12:45 pmSTL-AUS
5h 25m1 stop
6:30 am - 11:32 amAUS-STL
5h 02m1 stop
$276Delta
Find Deal
Sun, Jul 20 - Wed, Jul 30
5:30 am - 12:47 pmSTL-AUS
7h 17m1 stop
6:34 pm - 11:52 pmAUS-STL
5h 18m1 stop
$315American Airlines
Find Deal
Fri, Jul 25 - Mon, Jul 28
5:27 pm - 10:12 pmSTL-AUS
4h 45m1 stop
5:54 pm - 10:28 pmAUS-STL
4h 34m1 stop
$332American Airlines
Find Deal
Sat, Apr 12 - Mon, Apr 14

Frontier flights from St. Louis to Austin

Our best Frontier deals on St. Louis to Austin flight tickets
Frontier
Apr 12
STL6:51 pmLambert-St Louis
18h 07m
1 stop
AUS12:58 pmAustin Bergstrom
Apr 15
AUS9:42 amAustin Bergstrom
14h 04m
1 stop
STL11:46 pmLambert-St Louis
Frontier
Apr 23
STL5:41 pmLambert-St Louis
25h 20m
1 stop
AUS7:01 pmAustin Bergstrom
Apr 25
AUS4:29 pmAustin Bergstrom
17h 32m
1 stop
STL10:01 amLambert-St Louis
Frontier
Apr 7
STL4:57 pmLambert-St Louis
15h 45m
1 stop
AUS8:42 amAustin Bergstrom
Apr 10
AUS9:47 amAustin Bergstrom
13h 59m
1 stop
STL11:46 pmLambert-St Louis

American Airlines flights from St. Louis to Austin

Our best American Airlines deals on St. Louis to Austin flight tickets
American Airlines
Jul 25
STL5:30 amLambert-St Louis
7h 17m
1 stop
AUS12:47 pmAustin Bergstrom
Jul 28
AUS6:34 pmAustin Bergstrom
5h 18m
1 stop
STL11:52 pmLambert-St Louis
American Airlines
Apr 12
STL5:27 pmLambert-St Louis
4h 45m
1 stop
AUS10:12 pmAustin Bergstrom
Apr 14
AUS5:54 pmAustin Bergstrom
4h 34m
1 stop
STL10:28 pmLambert-St Louis
American Airlines
Mar 25
STL3:48 pmLambert-St Louis
6h 18m
1 stop
AUS10:06 pmAustin Bergstrom
Mar 27
AUS5:00 amAustin Bergstrom
3h 48m
1 stop
STL8:48 amLambert-St Louis

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?

The cheapest month to fly to Austin from St. Louis is in September. Flight prices, which tend to average around $284, 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 January is your next best option. Flight prices from St. Louis to Austin during January average around $294.

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 Monday when prices can be found for as low as $312. This is often the case because there is less demand to fly during this day of the week. When flying out on a Friday, the most expensive travel day of the week, you can expect to see flight prices from St. Louis to Austin for around $376.

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

In the afternoon is the cheapest time of day to fly from St. Louis to Austin when you can find flight prices for as low as $353. Flying to Austin in the afternoon is an ideal time because this is during off-peak travel hours. Flights to Austin are more costly at noon, with an average ticket price of $391. Departure times at noon 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 17 weeks ahead of your departure date. In general, you can expect to find flights to Austin for around $317 when searching 17 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 $263 on momondo.

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

There are 1 cabin classes 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 March 2025, prices for St. Louis to Austin flights are approximately 48% 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

$97

Fastest flight time

2h 00m

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 $97. The best round-trip flight deal from St. Louis to Austin found on momondo in the last 72 hours is $130.
The fastest flight from St. Louis to Austin takes 2h 00m
Direct flights go from St. Louis to Austin every day.
There is 1 airport near Austin: Austin Bergstrom (AUS)

  • 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 00m, 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?

  • 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?

  • 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
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $134Free CancellationRating
6.0
3,293 reviews
Search Frontier flights
DeltaPriceFrom $192Free CancellationRating
8.0
7,944 reviews
Search Delta flights
American AirlinesPriceFrom $212Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
SouthwestPriceFrom $228Free CancellationRating
8.0
4,292 reviews
Search Southwest flights
United AirlinesPriceFrom $256Free CancellationRating
7.4
8,623 reviews
Search United Airlines flights
  • Southwest Flights From St. Louis to Austin

    Southwest flight deals from St. Louis to Austin start from $228 round-trip. Over the 16 Southwest flights for this route in a normal week, average airfare is usually $348 round-trip - but some users have found much cheaper deals with momondo.


Traveling to a place near Austin?

Book flights to Austin if you plan to visit one of these locations
Fredericksburg
Round Rock
San Marcos
Georgetown
Wimberley
Marble Falls
Cedar Park
Seguin
Dripping Springs
Pflugerville
Canyon Lake
Bastrop
Buda
Horseshoe Bay
Kyle
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.


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