AUS - STL

$57 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 2/3. 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
$128
Typical prices: $252-$352
Frontier
Thu 1/29Fri 1/30
AUS - STL • 1 stop
Cheapest non-stop
$233
Typical prices: $291-$769
Southwest
Fri 2/20Sat 2/21
AUS - STL • Non-stop
Our travelers' advice
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
Frontier
Cheapest • from $163 (round-trip)
Southwest
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
4 weeks
in advance
Our data shows that travelers who book at least 4 weeks in advance save around 52% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
October
Cheapest • 16% price drop
May
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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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

Thu, Jan 29 - Fri, Jan 30
Frontier Logo
11:16 am - 11:33 pm
AUS
-
STL
12h 17m1 stop
Frontier Logo
1:03 pm - 8:06 pm
STL
-
AUS
7h 03m1 stop
$128Frontier
Fri, Jan 23 - Fri, Jan 30
Frontier Logo
8:22 pm - 2:46 pm
AUS
-
STL
18h 24m1 stop
Frontier Logo
1:03 pm - 8:06 pm
STL
-
AUS
7h 03m1 stop
$137Frontier
Fri, Jan 9 - Mon, Jan 12
Multiple Airlines Logo
3:01 pm - 10:02 am
AUS
-
STL
19h 01m1 stop
Multiple Airlines Logo
5:11 pm - 4:04 pm
STL
-
AUS
22h 53m1 stop
$148Multiple Airlines
Fri, Jan 9 - Mon, Jan 12
Frontier Logo
8:13 pm - 10:02 am
AUS
-
STL
13h 49m2 stops
Frontier Logo
8:50 am - 5:07 pm
STL
-
AUS
8h 17m1 stop
$163Frontier
Fri, Jan 23 - Fri, Jan 30
Multiple Airlines Logo
8:22 pm - 2:46 pm
AUS
-
STL
18h 24m1 stop
Multiple Airlines Logo
8:22 pm - 10:34 am
STL
-
AUS
14h 12m2 stops
$174Multiple Airlines
Fri, Feb 20 - Sat, Feb 21
Frontier Logo
10:18 am - 7:41 pm
AUS
-
STL
9h 23m1 stop
Frontier Logo
5:11 pm - 5:08 pm
STL
-
AUS
23h 57m1 stop
$178Frontier
Thu, Jan 29 - Fri, Jan 30
Multiple Airlines Logo
11:16 am - 10:23 am
AUS
-
STL
23h 07m1 stop
Multiple Airlines Logo
8:22 pm - 10:34 am
STL
-
AUS
14h 12m2 stops
$179Multiple Airlines
Thu, Jan 8 - Mon, Jan 12
Delta Logo
5:30 am - 11:02 am
AUS
-
STL
5h 32m1 stop
Delta Logo
6:55 pm - 12:20 am
STL
-
AUS
5h 25m1 stop
$189Delta
Thu, Jan 1 - Mon, Jan 5
Frontier Logo
6:45 am - 10:02 am
AUS
-
STL
27h 17m1 stop
Frontier Logo
7:43 pm - 10:56 pm
STL
-
AUS
27h 13m1 stop
$220Frontier
Wed, Jan 7 - Mon, Jan 12
Delta Logo
6:11 pm - 11:25 pm
AUS
-
STL
5h 14m1 stop
Delta Logo
5:25 pm - 10:55 pm
STL
-
AUS
5h 30m1 stop
$227Delta
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 January.

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, Tuesday 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 $271 (return) on average. On the other hand, the most expensive months are March and December, where the average cost of round-trip tickets is $382 and $361 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.

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 1 stop layover the cheapest option at $311 on average.

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 52% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 17 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.
Airports
AUS

Arrive early at AUS to enjoy live music on weekdays, with performances on 8 stages throughout the terminal.

STL

Use MetroLink for a convenient ride from STL to downtown St. Louis, avoiding rush hour traffic.

Our travel experts
Yulia Denisyuk

Yulia Denisyuk

Expert on STL

Yulia Denisyuk

Yulia Denisyuk

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.

Read more
Harriet Baskas

Harriet Baskas

Expert on AUS

Harriet Baskas

Harriet Baskas

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.

Read more

Good to know

Low seasonOctober
Cheapest flight$57
Best time to beat the crowds with an average 17% drop in price.
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 $57 for a one-way ticket and $128 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, Delta, and American Airlines 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?

    oneworld is the only airline alliance operating flights between Austin and St. Louis.

  • 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 American Airlines?

    The two airlines most popular with KAYAK users for flights from Austin to St. Louis are Southwest and American Airlines. With an average price for the route of $325 and an overall rating of 8.0, Southwest is the most popular choice. American Airlines is also a great choice for the route, with an average price of $439 and an overall rating of 7.2.

  • 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 $186 or less one-way and $292 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.
8.0
SouthwestOverall score based on 4252 reviews
7.5Entertainment
8.1Boarding
7.0Food
8.6Crew
8.0Comfort
Airline reviews

Still a fan of open seating. Flight was on schedule and arrived on time. The 737 MAX is very comfortable.

10.0 ExcellentAnonymous, Dec 2025
DAL - LAX
Read more Southwest reviews

Still a fan of open seating. Flight was on schedule and arrived on time. The 737 MAX is very comfortable.

Had to get off plane from prior flight even though I had to reboard same plane to continue to my final destination.

Boarded on time but once we were ready for take off, the crew determined that, although every seat was taken, somehow someone was on the wrong flight. Delay, delay delay, announcements and ended up with one person checking EVERY ID against their passenger Manifest only to figure out it was a "clerical error." We departed 54 minutes late causing me to run in the St. Louis Airport to make my connection and lose the priority boarding spot I had paid for. Unnecessary delay.

Flight was delayed due to plane not passing inspection And one of the crew had to time out and we had to wait for another one A 3 hour delay

AC sub par. WiFi not working correctly. Ac sucked. Seats very narrow.

Southwest's seats are the least comfortable I have ever sat in.

southwest just starting charging for luggage. hadnt realized it until it was too late. now out $70 when i couldve bought a carry on if i wouldve known. free bags was one of the only reasons i chose southwest over another airline (the other being no assigned seats, which is apparently also being changed). stupid business decision. wont be flying southwest anymore.

It was one and half hour late... Not sure if any other experience matters.

For my birthday trip this was my second time ever flying, this trip was the best.

Flight crew and cabin crew were great. I had to rearrange flights because my original flight was 3hrs delayed for weather, the rub is the flight I moved to boarded on time then we sat at the gate for 2 hours because scheduling stole our first officer for another flight, TWICE. Then our actual FO was an hour delayed. To make it worse my original flight went from a 3 hour delay to departing 15min EARLY. Just poor scheduling operations all around.

Lately I like the planes have been exceptionally filthy. There’s lines of dust and dirt all across the ceiling in the vents, and the cracks in between the seats are literally full of food. It’s definitely not the quality of service that I was used to with United. I’m also very disappointed with the Wi-Fi! All I wanna do is knock out a few work jobs while I’m trapped in my seat And it spools so bad. They did provide me with a refund, but the process of getting that refund is so complicated. It’s unfortunate.

Excellent flight. Smooth, efficient boarding. Quick flight. Arrived early at STL.

The newer screen was super cool and had the option to watch many different shows or movies. Crew was polite and helpful. However again, many children screaming bloody murder and kicking my seat, and parents doing nothing about it as usual.

Flight was good and crew was super polite. However, there were around 5 kids screaming the WHOLE 2 hours. I understand kids have to come but parents need to do something to control their children. They make the experience terrible, especially after finishing 16 hour shifts at the hospital I needed some sleep, which I did not get.

Plane was crowded and even when we hit altitude, the plane was hot, not enough air flow.

Overall it was good. I missed my connection but I was put on another flight.

Gate agent did not hold flight for connection, provided no assistance to get new flight

Smooth flight. Boarding was chaotic. Could not hear the gate agent over the intercom. People were lined up in the wrong lines. Groups one and two were told to board through line one and group 3 through line 2. All very confusing. Once in the air, the flight was smooth. There was no entertainment option on this aircraft, even though it was a larger aircraft.

We boarded but then sat there waiting on some missed connection people to get on so we sat for about 15 minutes for that. Then we sat again because the passenger manifest was wrong and they had to figure it out before we could leave. That took about another 20 minutes or so. The crew was working hard to figure it out so it’s not their fault. It ended up being a system glitch where someone was upgraded to first class while another person was also in the same seat and it just created a mess that took a little while to figure out. They literally went to every person on the plane asking their names to see who was sitting in the wrong seat. I also hate the entertainment that must be watched on your phone or tablet. Just give us setback screens. It’s so much better. Almost every Delta flight has this now and it is so nice to have them. The crew did a great job. I have no complaints from them. They were very hard working, even with the mishap and a disgruntled passenger.

My priority checked bag was not loaded on the flight. I had to sit in baggage claim in Las Vegas for 2 1/2 hours waiting for the next flight. All baggage staff were very helpful, tracking showed it as scanned for loading. Nobody told me why it wasn't on my flight.

Attendants were pleasant and the flight was smooth and relaxed.

It was fine. No drinks nor snacks offered though. I thought that was unusual.

Things were delayed a little. But that didn’t affect my plans. It was fine. I was surprised it was so full thanksgiving day. The crew were friendly and professional.

The flight was delayed multiple times, again no fault of American but again the extra cost, for everything makes it feel like a cheap airline! Especially when flights are outrageously expensive already

we landed at cmh ten minutes early but had to sit on tarmac for twenty minutes because a plane was at our gate despite the fact that 3 other gates were open.

I have a gluten allergy so did have any food

Wish some foods provided rather than just biscuit/cookie for flight more than 2 hours

Flight was delayed leaving Dallas. Arrived about 2 hours later than scheduled.

The only thing to like was that we eventually got to our destination

Poor seat in rear of aircraft Food at Admiral’s Club Terminal D at DFW inedible

Not clean and was told I would get a great seat and it was not great at all

Flight got delayed for 5 hours no good explanation was offered ;(

Horrible. I would never fly Frontier again. The booking process is tricky at best, but fraudulent in my opinion. Frontier customer service did nothing to rectify my purchase -- I ended up paying more than double what I could have gotten from other airlines and nearly triple what I thought I was buying from Frontier. Their booking practices are unfair to the consumer.

Delayed. Text notifications were slow. Not much information o what was happening. Boarding was slow and confusing. Wasn’t even offered water other flight. Had to ask. No entertainment at all. Felt like.a Greyhound bus.

When I wanted to check in 3 hours prior to boarding time, the employees mentioned “a little over an hour delay” so I waited for an hour then I went to go look for food in the terminal and most people from that flight were in the same area looking for food. Finally I decided after food to check to see if it’s anytime closer and now it’s 2 mins until boarding closes?! What are you kidding me? I didn’t receive anything via sms about boarding now nor via email or on the intercom. I luckily made it through, barely, and then there’s no room for my carry on mind you I’m in the very first row so I had to place my purse in one further row back and my carry on sections down. Not sure who pays for better seats to get your stuff placed all over the plane but that was the worst experience I’ve ever had flying with anyone.

Better than expected. Staff were friendly and nice on both flights.

There was no one at the counter to assist with our check in. The app didn’t work, so I arrived at the airport with time to check in and I couldn’t because no employees were there. When I finally got someone on the phone, it was inside the 60min rule and they said I could no longer check in and they could sell me another ticket. We had to scramble and pay an additional $800 for tickets and THEN AFTER (about 60 min from my original convo with customer service and 10min after original departure time) I had boarded my new flight, there was email saying my original flight from Frontier was delayed and leaving 2hr 50min later, but I STILL wouldn’t have been able to check in. Which means customer service should have been able to see it and let me check in because I was well within my check in time. When I call Frontier, they hang up on me. So their app didn’t work and they employees left and they take zero responsibility or assistance with their “customer service”

Terrible. Flight cancelled with no reasoning and no flights to rebook. Employees were useless and did nothing to help. Did not even know where to retrieve luggage from the cancelled flight. Flyers beware.

No fault of Frontier staff: plane was very late, reached Orlando at 1 am, took a while to get luggage. Weather, gov financial shutdown impact on TSA, air controllers seemed to have multiple flights backed up. Frontier staff seemed to cope as gracefully as possible. It did reassure me that I and my new hip could adapt to travel challenges. Food/entertainment were irrelevant to my trip.

Terrible. The canceled my entire flight when I requested a refund for a trip frontier canceled trip one way.

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

Information on your arrival and departure airports