Cheap flights from St. Louis to Austin from $76

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 10/8. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

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

Trusted and free

Trusted and free

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

Price Alerts

Price Alerts

Not ready to book? to track prices.

Find the cheapest flights from St. Louis to Austin

Cheap round-trip flights

Southwest Logo
10:20 pm - 12:25 amSTL-AUS
2h 05mnonstop
Southwest Logo
5:05 am - 7:05 amAUS-STL
2h 00mnonstop
$151Southwest
Find Deal
Thu, Oct 9 - Mon, Oct 13
American Airlines Logo
5:52 pm - 10:41 pmSTL-AUS
4h 49m1 stop
American Airlines Logo
2:33 pm - 6:30 pmAUS-STL
3h 57m1 stop
$159American Airlines
Find Deal
Wed, Aug 27 - Tue, Sep 2
Southwest Logo
4:25 pm - 6:25 pmSTL-AUS
2h 00mnonstop
Southwest Logo
5:05 am - 7:10 amAUS-STL
2h 05mnonstop
$161Southwest
Find Deal
Tue, Aug 5 - Thu, Aug 14
Southwest Logo
6:10 am - 10:20 amSTL-AUS
4h 10m1 stop
Southwest Logo
12:45 pm - 2:55 pmAUS-STL
2h 10mnonstop
$166Southwest
Find Deal
Tue, Aug 5 - Thu, Aug 14
American Airlines Logo
4:36 pm - 10:53 pmSTL-AUS
6h 17m1 stop
American Airlines Logo
5:51 pm - 10:23 pmAUS-STL
4h 32m1 stop
$178American Airlines
Find Deal
Thu, Sep 11 - Sun, Sep 14
Delta Logo
5:23 pm - 12:14 amSTL-AUS
6h 51m1 stop
Delta Logo
6:20 pm - 11:14 pmAUS-STL
4h 54m1 stop
$197Delta
Find Deal
Fri, Aug 8 - Sun, Aug 17
United Airlines Logo
6:15 pm - 10:59 pmSTL-AUS
4h 44m1 stop
United Airlines Logo
5:00 am - 12:27 pmAUS-STL
7h 27m2 stops
$255United Airlines
Find Deal
Mon, Aug 11 - Tue, Aug 12
Frontier Logo
5:40 pm - 3:51 pmSTL-AUS
22h 11m1 stop
Frontier Logo
7:00 am - 9:11 amAUS-STL
26h 11m1 stop
$261Frontier
Find Deal
Wed, Jul 23 - Tue, Jul 29
United Airlines Logo
5:00 am - 10:23 amSTL-AUS
5h 23m1 stop
United Airlines Logo
2:15 pm - 6:53 pmAUS-STL
4h 38m1 stop
$267United Airlines
Find Deal
Sun, Aug 10 - Tue, Aug 12
Frontier Logo
7:29 pm - 11:34 pmSTL-AUS
28h 05m1 stop
Frontier Logo
6:00 am - 9:11 amAUS-STL
27h 11m1 stop
$272Frontier
Find Deal
Fri, Jul 25 - Sun, Jul 27

Southwest flights from St. Louis to Austin

Our best Southwest deals on St. Louis to Austin flight tickets
Southwest
Oct 9
STL10:20 pmLambert-St Louis
2h 05m
AUS12:25 amAustin Bergstrom
Oct 13
AUS5:05 amAustin Bergstrom
2h 00m
STL7:05 amLambert-St Louis
Southwest
Aug 5
STL4:25 pmLambert-St Louis
2h 00m
AUS6:25 pmAustin Bergstrom
Aug 14
AUS5:05 amAustin Bergstrom
2h 05m
STL7:10 amLambert-St Louis
Southwest
Aug 5
STL6:10 amLambert-St Louis
4h 10m
1 stop
AUS10:20 amAustin Bergstrom
Aug 14
AUS12:45 pmAustin Bergstrom
2h 10m
STL2:55 pmLambert-St Louis

Frontier flights from St. Louis to Austin

Our best Frontier deals on St. Louis to Austin flight tickets
Frontier
Jul 23
STL5:40 pmLambert-St Louis
22h 11m
1 stop
AUS3:51 pmAustin Bergstrom
Jul 29
AUS7:00 amAustin Bergstrom
26h 11m
1 stop
STL9:11 amLambert-St Louis
Frontier
Jul 23
STL5:40 pmLambert-St Louis
22h 11m
1 stop
AUS3:51 pmAustin Bergstrom
Jul 31
AUS1:59 pmAustin Bergstrom
23h 43m
1 stop
STL1:42 pmLambert-St Louis
Frontier
Jul 25
STL7:29 pmLambert-St Louis
28h 05m
1 stop
AUS11:34 pmAustin Bergstrom
Jul 27
AUS6:00 amAustin Bergstrom
27h 11m
1 stop
STL9:11 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 May is your next best option. Flight prices from St. Louis to Austin during May average around $288.

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 Friday, the most expensive travel day of the week, you can expect to see flight prices from St. Louis to Austin for around $373.

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

In the morning is the cheapest time of day to fly from St. Louis to Austin when you can find flight prices for as low as $348. Flying to Austin in the morning 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 $360. 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 weeks ahead of your departure date. In general, you can expect to find flights to Austin for around $312 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 $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.

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

You could potentially save up to 29% on your flight if you consider stops on a St. Louis to Austin flight.

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

As of July 2025, prices for St. Louis to Austin flights are approximately 3% 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

$76

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 $76. The best round-trip flight deal from St. Louis to Austin found on momondo in the last 72 hours is $151.
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
DeltaPriceFrom $98Free CancellationRating
8.0
7,952 reviews
Search Delta flights
FrontierPriceFrom $141Free CancellationRating
5.9
3,271 reviews
Search Frontier flights
American AirlinesPriceFrom $210Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
SouthwestPriceFrom $216Free CancellationRating
8.0
4,250 reviews
Search Southwest flights
United AirlinesPriceFrom $244Free CancellationRating
7.4
8,846 reviews
Search United Airlines flights
  • Southwest Flights From St. Louis to Austin

    Southwest flight deals from St. Louis to Austin start from $216 round-trip. Over the 22 Southwest flights for this route in a normal week, average airfare is usually $336 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
San Marcos
Round Rock
Wimberley
Georgetown
Canyon Lake
Marble Falls
Dripping Springs
Cedar Park
Horseshoe Bay
Pflugerville
Seguin
Kyle
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.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Tue 7/15
Tue 7/22

Find better results for your trip to the United States