AUS - STL

$65 Find Cheap Flights from Austin to St. Louis

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Austin to St. Louis departing on 5/26. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to St. Louis

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Austin to St. Louis, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Austin to St. Louis, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$129
Typical prices: $438-$296
Frontier
Tue 6/2Fri 6/5
AUS - STL • 1 stop
Cheapest non-stop
$221
Typical prices: $393-$257
Southwest
Tue 6/9Tue 6/16
AUS - STL • Non-stop
Advice from real travelers
AI-powered summary based on content written by travel experts. AI can make mistakes.
Arrive early at AUS for live music on weekdays.
Use MetroLink from STL to avoid traffic downtown.
Expert advice
Expert advice
Expert advice
Expert advice
Top airlines
Cheapest • from $129 (round-trip)
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
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Airline reviews
Airline reviews
+1
Nonstop flights
You can fly direct with Southwest. Average duration is 2h 05m
Direct flights
Direct flights
+1
+1
Direct flights
Direct flights
+1
Top layover airports
Cheapest • Avg $207 (round-trip)
Shortest trip • 3h 35m (one-way)
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 4 weeks in advance save around 44% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 19% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to St. Louis!
Flight Deals
Booking Insights
Expert advice
Flight Deals

Cheap Flights from Austin to St. Louis (AUS-STL)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Austin to St. Louis that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Austin to St. Louis

Tue, Jun 2 - Fri, Jun 5
Frontier Logo
10:28 am - 7:23 pm
AUS
-
STL
8h 55m
1 stop
Frontier Logo
5:27 pm - 11:49 am
STL
-
AUS
18h 22m
1 stop
$129Frontier
Thu, Jun 25 - Mon, Jun 29
Frontier Logo
5:38 pm - 8:52 am
AUS
-
STL
15h 14m
1 stop
Frontier Logo
5:06 pm - 4:43 pm
STL
-
AUS
23h 37m
1 stop
$132Frontier
Thu, Jun 11 - Wed, Jun 17
Frontier Logo
5:38 pm - 8:52 am
AUS
-
STL
15h 14m
1 stop
Frontier Logo
8:08 pm - 7:30 pm
STL
-
AUS
23h 22m
1 stop
$143Frontier
Wed, Jul 8 - Tue, Jul 14
Frontier Logo
6:30 am - 7:23 pm
AUS
-
STL
12h 53m
1 stop
Frontier Logo
8:08 pm - 12:07 am
STL
-
AUS
27h 59m
1 stop
$161Frontier
Fri, Jun 19 - Fri, Jun 26
Frontier Logo
1:40 pm - 8:52 am
AUS
-
STL
19h 12m
1 stop
Frontier Logo
5:06 pm - 11:48 am
STL
-
AUS
18h 42m
1 stop
$164Frontier
Tue, Jun 9 - Fri, Jun 12
Frontier Logo
3:27 pm - 8:47 am
AUS
-
STL
17h 20m
1 stop
Frontier Logo
5:06 pm - 11:48 am
STL
-
AUS
18h 42m
1 stop
$165Frontier
Fri, Jun 5 - Sun, Jun 7
Frontier Logo
1:59 pm - 8:55 am
AUS
-
STL
18h 56m
1 stop
Frontier Logo
6:33 pm - 1:04 pm
STL
-
AUS
18h 31m
1 stop
$168Frontier
Wed, Jun 3 - Tue, Jun 9
Frontier Logo
10:28 am - 7:23 pm
AUS
-
STL
8h 55m
1 stop
Frontier Logo
6:31 pm - 12:45 pm
STL
-
AUS
18h 14m
1 stop
$177Frontier
Thu, May 28 - Mon, Jun 1
Frontier Logo
10:28 am - 7:23 pm
AUS
-
STL
8h 55m
1 stop
Frontier Logo
8:08 pm - 9:43 am
STL
-
AUS
13h 35m
1 stop
$181Frontier
Fri, Jun 5 - Sun, Jun 7
Frontier Logo
9:13 pm - 1:55 pm
AUS
-
STL
16h 42m
2 stops
Frontier Logo
6:33 pm - 1:04 pm
STL
-
AUS
18h 31m
1 stop
$185Frontier
Booking Insights

KAYAK's insights & trends for Austin to St. Louis flights

Get data-powered insights and trends into flights from Austin to St. Louis to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Austin to St. Louis?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Austin to St. Louis departing in June.

What’s the cheapest day of the week to fly from Austin to St. Louis?

The average price of all round-trip flights from Austin to St. Louis clicked on KAYAK for each day over the last 12 months.

If you are looking for a flight deal from Austin to St. Louis, look for departures on Tuesdays and avoid leaving on a Sunday, as it's usually the priciest day. When flying back from St. Louis, Saturday is the cheapest day to fly and Sunday is the most expensive.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Austin to St. Louis, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Austin to St. Louis is October, where tickets cost $268 (return) on average. On the other hand, the most expensive months are March and January, where the average cost of round-trip tickets is $394 and $349 respectively.

Can I save money by flying with a layover from Austin to St. Louis?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

No, with an average price for the route of $304, prices are generally cheapest when you fly direct.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Austin to St. Louis, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Austin to St. Louis, you should book around 4 weeks before departure, which saves you about 44% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 26 weeks before departure.

Expert advice

Expert advice for your flight from Austin to St. Louis

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Yulia Denisyuk

Yulia Denisyuk

Expert on STL

Yulia is a freelance journalist who’s dispatched from 90+ countries. Her work focuses on cultures, adventure trips and air travel, appearing in NatGeo, NYT, CNTraveler, and more. For past assignments, she’s stayed with nomads in Mongolia and learned the art of Imigongo in Rwanda. She’s based in Chicago; in winter she often questions that decision.

Harriet Baskas

Harriet Baskas

Expert on AUS

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Good to know

Low seasonOctober
Cheapest flight$65
Best time to beat the crowds with an average 20% drop in price.
Most popular time to fly and prices are also 5% lower on average.
Flight from Austin to St. Louis

When to book flights from Austin to St. Louis

Are your dates flexible? Find out the best times to travel from Austin to St. Louis based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Austin to St. Louis

  • What are the best hours to arrive at AUS?

    The peak departure travel hours range from 5 am to 11 am and 3:30 pm to 5:30 pm. Don't book your flight from Austin to St. Louis during these peak hours to avoid encountering longer waits at AUS security checkpoints.

  • What are the alternative airports in Saint Louis?

    You can try Marion Williamson County Airport located in Marion or choose Springfield Capital Airport in Springfield. Both airports are located near STL. However, you may opt for the least expensive journey on this route by typically booking flights from AUS to STL in advance other than using nearby airports.

  • Where will I find car rental services at STL?

    Find car rental desks at the main terminal on your way out. There are up to seven car rental agencies at STL and they include Enterprise, Avis, Alamo, Budget, Hertz, Thrifty, and National. All companies offer shuttle services between the passenger drop-off location and the main airport terminal where you can pick up your ride.

  • Where can I find facilities for nursing mothers at STL?

    The three Lactation Suites are located post-security of every concourse next to gates A-10, C-9, and E-33. All suites feature sinks, spacious counters power outlets, full-back club chairs with adjustable arm tables, and seats for other traveling companions. Plus, each Lactation Suite is ADA-compliant. Gain access to these facilities by texting a number shared on digital signage at each location to receive a text indicating a door code.

  • What is the cheapest flight from Austin to St. Louis?

    In the last 3 days, the lowest price for a flight from Austin to St. Louis was $65 for a one-way ticket and $129 for a round-trip.

  • Do I need a passport to fly between Austin and St. Louis?

    No, a passport isn't needed to fly from Austin to St. Louis. However, local authorities might ask for an official ID.

  • Which airports will I be using when flying from Austin to St. Louis?

    Austin airport is called Austin Bergstrom and the only airport in St. Louis is Lambert-St Louis.

  • Which airlines offer Wi-Fi service onboard planes from Austin to St. Louis?

    JetBlue, American Airlines, and Delta offer inflight Wi-Fi service on the Austin to St. Louis flight route.

  • Which aircraft models fly most regularly from Austin to St. Louis?

    The Boeing 737 MAX 8 is the aircraft model that flies most regularly on the Austin to St. Louis flight route.

  • Which airline alliances offer flights from Austin to St. Louis?

    Star Alliance, and oneworld are the airline alliances operating flights between Austin and St. Louis, with Star Alliance being the most commonly used for this route.

  • On which days can I fly direct from Austin to St. Louis?

    There are nonstop flights from Austin to St. Louis on a daily basis.

  • Which is the best airline for flights from Austin to St. Louis, Southwest or United Airlines?

    The two airlines most popular with KAYAK users for flights from Austin to St. Louis are Southwest and United Airlines. With an average price for the route of $346 and an overall rating of 7.9, Southwest is the most popular choice. United Airlines is also a great choice for the route, with an average price of $313 and an overall rating of 7.4.

  • How does KAYAK find such low prices on flights from Austin to St. Louis?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Austin to St. Louis.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Austin to St. Louis?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to St. Louis from Austin is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Austin to St. Louis?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to St. Louis with an airline and back to Austin with another airline. Booking your flights between Austin and STL can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Austin to St. Louis?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to St. Louis from Austin up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Austin to St. Louis

  • Looking for a cheap flight? 25% of our users found flights on this route for $218 or less one-way and $305 or less round-trip.
  • Typically, flights from Austin to St. Louis depart from Austin Bergstrom International Airport (AUS) and arrive at Lambert-Saint Louis International Airport (STL). Dubbed AUS, Austin Bergstrom is located approximately 5 miles southeast of downtown Austin, Texas. AUS is a hub for Allegiant Air and it serves several popular airlines on this route that include American Airlines, Spirit Airlines, and Alaska Airlines. The airport features two passenger terminals; South Terminal and Barbara Jordan Terminal.
  • Make sure to arrive at AUS at least two hours before your scheduled flight departure. Usually, the current wait time at AUS is around 25 minutes on average and this is the time it will take you to go through all the security checkpoints which are located in both terminals.
  • Alternatives to AUS include Austin Executive Airport, Bud Dryden Airport, Breakaway Airport, Georgetown Municipal Airport, and Elgin Intracontinental Airport. All of these are considered smaller airports compared to AUS, where most passenger flights to various destinations happen.
  • If you are traveling through AUS without checked luggage, you can save your time by skipping the airline ticket counters and proceeding to security screening checkpoints. Use the upper curbside and lower curbside for drop-off through elevators and escalators at the Lower Level. You may also take advantage of the self-service flight check-in kiosks inside the terminal to save your boarding time.
  • Choose the most convenient transportation means from Lambert-Saint Louis International Airport (STL) to downtown St. Louis. Remember, STL is about 15 miles from the St. Louis city center, so using a taxi or a bus should be a cheaper option. Ride Share Services, Shuttle Service, Limousine, services, and MetroLink are additional transportation means and you can find them just outside the passenger terminal.

Prefer to fly direct from Austin to St. Louis?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Austin Bergstrom to Lambert-St Louis.
Find which airlines fly direct from Austin Bergstrom Airport to Lambert-St Louis Airport, which days they fly and book direct flights.

Direct departures

Austin Bergstrom to Lambert-St Louis

Monday

Southwest

Southwest

Tuesday

Southwest

Southwest

Wednesday

Southwest

Southwest

Thursday

Southwest

Southwest

Friday

Southwest

Southwest

Saturday

Southwest

Southwest

Sunday

Southwest

Southwest

See more direct flights

Direct returns

Lambert-St Louis to Austin Bergstrom

Monday

Southwest

Southwest

Tuesday

Southwest

Southwest

Wednesday

Southwest

Southwest

Thursday

Southwest

Southwest

Friday

Southwest

Southwest

Saturday

Southwest

Southwest

Sunday

Southwest

Southwest

See more direct flights

Reviews of the top 4 airlines serving from Austin to St. Louis

 
See real verified KAYAK customer reviews for airlines flying from Austin to St. Louis. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Austin to St. Louis? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
SouthwestOverall score based on 4305 reviews
8.1Boarding
7.0Food
8.6Crew
7.5Entertainment
8.0Comfort
Airline reviews

First time I've had to use the disabled accommodations. And I could not have had a better experience with Southwest, i was having trouble getting from one terminal to another due to my heart failure. And the next thing I know a Southwest agent had made sure. I had a wheelchair at all my flights. Can't thank them enough.

10.0 Excellentdebra, Apr 2026
LBB - LAS
Read more Southwest reviews

First time I've had to use the disabled accommodations. And I could not have had a better experience with Southwest, i was having trouble getting from one terminal to another due to my heart failure. And the next thing I know a Southwest agent had made sure. I had a wheelchair at all my flights. Can't thank them enough.

The new seat assignment thing is wierd. If you don’t pay for a seat they always assign you a middle seat regardless of how many people are on the flight. Idk… the new company that bought Southwest is trying to make it more profitable, but I’m just not seeing it. The flight attendants aren’t having as much fun anymore. It just feels like the airline is slowly dying. IMO. We shall see if Southwest is the next Toy’s R Us.

The Air hostess were very rude on my flight from Houston to Austin . Their regular communication itself felt a they are shouting at people.

Communication about the delayed flight was poor. We were told to move gates three times but that was bad information. We went from gate 128 to gate 126 and then to gate 123 and back to gate 126. Communication about the delay was bad. Ended up being 1 1/2 hour late getting home.

Plane was late. Zero service for 2+ hour flight and it was not that bumpy.

I have roller bag with food and medication told me I couldn't bring on my 2nd flight today. 15 years flying with SW never an issue with that bag.

Great flight. Good snacks and drinks. Grateful it was free. The flight from Nashville to louisville, i think her name was Tracy (not sure that's right) super awesome, nice and cheerful. She really enjoyed being at work today! She was the person who scanned the boarding pass on flight wn941. She should be recommended for a raise !

I elected to pay for the upgrades and found very little difference

I have not flown Southwest in awhile and had a very pleasant experience. From ticketing to boarding to the flight. The flight left on time and landed ahead of schedule. It won't be so long next time!!

Flight was hours late, unable to sit next to spouse, I have had so much better experiences. Substantially better, only saving grace was that it was a short flight.

Great flight. Got to watch a movie. Smooth flight and early arrival at ORD.

The wheelchair service is useless. They live you in different spots, not tell you anything just wait. I waited 30 minutes in Frankfurt when decided to walk the 25 minutes distance. In Budapest nobody came.

Fine. The issues I had were associated with luggage being delayed from Turkey to Tanzania

I've been flying American mostly, and it's been very frustrating. This united flight makes me realize maybe the issue isn't flying, but the airline. United was a significantly better experience. The plane was more comfortable, with a normal amount of leg room (vs the ridiculous reductions AA has made), more comfortable seats, screens to watch movies. It was a much better experience!

We had excellent customer service despite the chaos at George Bush airport in Houston!

It isvvery small flight. No leg room . No space to put my personal item at feet.

Overall we had a good experience during our flight from San Francisco to Houston.

Airport terminal was outdated, flight was on a small jet with no wifi

Do not like the size of the overhead bin. I think staff should monitor the size of suitcases that are being carried on by passengers to ensure they meet the size requirement.

The power at the seat didn't work and the seat itself was difficult to adjust - this was a business class seat. Flight attendant gave me miles to compensate. The attendant was very professional and on top of his game the entire flight.

Cancelled BOYH legs of our flight home 30 min before initial boarding

The flight was delayed about an hour for a maintenance specialist to approve the maintenance repair

This flight was delayed but it worked in my favor because my Atlanta to Dallas flight was delayed.

The staff was nice. I appreciated that I was able to take an earlier flight, even though it was last minute. The boarding process felt rather chaotic.

My flight got delayed a total of five times. And the boarding gate changed four times. most of the time the platform was not up-to-date with the changes taking place. The most discouraging part of the entire trip by far.

Returned home with a blood clot from flight homes and the uncomfortable aircraft I was on.

The crew was very kind, but no in-flight entertainment monitors and a 2 hour and 30 minute delay was extremely frustrating.

Everything was delayed and the staff sent me to the wrong gate, causing me to miss one of my flights. I arrived at my destination 6 hours later than I was supposed to.

It was good, the staff was great, and the food, was as usual, tea and biscuit. Bathroom was clean, and the plane was clean as well.

It was really a terrific experience both going and returning on AA. Staff and crew were professional.

Frontier scheduled a 40 minute connection in DEN. What they failed to mention was that they “close the doors” 20 mins prior to departure, which means you only have 20 mins. Not enough time. Possibly against DOT regulations. Filing complaint.

Flight was scheduled at 9:40pm. Got delayed to 10 am, the next day. crazy

The bag check, flight check-in, and onboard experience convinced my wife and me that we will actively go out of our way to avoid flying Frontier Airlines in the future. At bag check, we were informed that check-in could only be completed via the Frontier mobile app. Unfortunately, the app was extremely frustrating—sending us through repetitive, confusing loops that repeatedly forced us to decline add-on services with nearly every click. While most airline apps upsell, this one felt intentionally exhausting. As the process dragged on, we became genuinely concerned that my phone battery would die before check-in could be completed. We approached the bag check staff—who were standing together talking—and explained both our frustration and our predicament. They laughed. Later, my wife described the interaction as “gaslighting,” which felt accurate. We were then informed it would cost $25 per person simply to have our boarding passes printed. From that point forward, the tone of the experience was consistently hostile. The bag check employees were condescending and combative, behaving more like bullies than customer service staff. Unfortunately, that same attitude continued onboard. One flight attendant argued with me when I attempted to stow my backpack in the overhead bin. I explained that we had each paid $75 to check our bags specifically so we would not need to use carry-on space and could have adequate legroom. She demanded to see my ticket, pointed out that it said “no carry-on”—which I acknowledged—and I reiterated that this was precisely why we paid to check our bags. Her response was, “I don’t make the rules.” She then walked away, but not before asking if I “truly wanted to fly back to Chicago today?”—an unnecessary and unmistakable threat. It is also worth noting that despite booking our tickets together in the same transaction, we were not seated together. Upon our return to Chicago—where we could once again sit together—we compared onboard experiences. We both remarked on how unhappy the flight attendants appeared and how each of us was separately asked whether we would like to purchase a beverage. We declined. At no point was water mentioned as an option, leaving us with the clear impression that even water came at a cost—or that complimentary water, if available at all, was deliberately left unmentioned. Overall, the experience was shocking and deeply disappointing, but it was also a profound learning experience—one we will not forget and will not repeat. -Steve

Plane was hot and miserable and the crew was rude!

12 hour delay required getting on and off plane 3 times - would have at least liked to have been offered a snack or drink

They didn’t offer a water, even after I asked

They switched our terminal 3 times and we were delayed for four plus hours!!!

It was an early flight and most people napped/slept and the crew let us which was nice.

The crew acted like they had never done this and kept barking passive aggressive orders at people. + the security line + the delay + sitting on the tarmac for 2 hours + none of the apps or signage updating with correct times

More inflight connection. And leg space is horrible. And the paying for baggage I'd ridiculous!!!

Everything you need to know for your flight from Austin to St. Louis

Information on your arrival and departure airports