AUS - STL

$66 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 5/16. 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
Travelers love KAYAK
41.299.237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$160
Overall average: $303
Frontier
Fri 4/24Sun 4/26
AUS - STL • 1 stop
Cheapest non-stop
$199
Typical prices: $242-$410
Southwest
Wed 4/15Sat 4/18
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
Frontier
Cheapest • from $160 (round-trip)
Southwest
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Every day
You can fly direct with Southwest. Average duration is 2h 03m
Direct flights
Direct flights
+1
+1
Direct flights
Direct flights
+1
Top layover airports
Denver (DEN)
Cheapest • Avg $244 (round-trip)
Dallas (DAL)
Shortest trip • 3h 40m (one-way)
Insights
Insights
Insights
Insights
When to book
4 weeks
in advance
Our data shows that travelers who book at least 4 weeks in advance save around 48% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
October
Cheapest • 18% 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

Fri, Apr 24 - Sun, Apr 26
Frontier Logo
11:01 am - 7:21 pm
AUS
-
STL
8h 20m
1 stop
Frontier Logo
4:59 pm - 6:17 pm
STL
-
AUS
25h 18m
1 stop
$160Frontier
Tue, Mar 24 - Wed, Mar 25
Frontier Logo
10:45 pm - 9:49 am
AUS
-
STL
11h 04m
1 stop
Frontier Logo
8:12 pm - 10:06 am
STL
-
AUS
13h 54m
1 stop
$162Frontier
Fri, Apr 24 - Sun, Apr 26
Frontier Logo
9:47 pm - 7:32 pm
AUS
-
STL
21h 45m
1 stop
Frontier Logo
9:55 pm - 12:15 pm
STL
-
AUS
14h 20m
1 stop
$171Frontier
Tue, Mar 17 - Tue, Mar 24
Frontier Logo
10:45 pm - 9:49 am
AUS
-
STL
11h 04m
1 stop
Frontier Logo
11:27 am - 3:16 pm
STL
-
AUS
27h 49m
1 stop
$175Frontier
Fri, Mar 27 - Mon, Mar 30
Frontier Logo
6:45 am - 9:49 am
AUS
-
STL
27h 04m
1 stop
Frontier Logo
8:12 pm - 12:16 am
STL
-
AUS
28h 04m
1 stop
$183Frontier
Fri, Mar 6 - Mon, Mar 9
Frontier Logo
10:45 pm - 9:49 am
AUS
-
STL
11h 04m
1 stop
Frontier Logo
2:09 pm - 3:16 pm
STL
-
AUS
25h 07m
1 stop
$189Frontier
Thu, Apr 2 - Mon, Apr 6
Frontier Logo
6:45 am - 9:48 am
AUS
-
STL
27h 03m
1 stop
Frontier Logo
8:16 pm - 12:21 am
STL
-
AUS
28h 05m
1 stop
$192Frontier
Sat, Apr 25 - Tue, Apr 28
United Airlines Logo
4:20 pm - 10:28 pm
AUS
-
STL
6h 08m
1 stop
United Airlines Logo
9:10 am - 4:16 pm
STL
-
AUS
7h 06m
1 stop
$197United Airlines
Wed, Mar 18 - Wed, Mar 25
Southwest Logo
3:50 pm - 5:55 pm
AUS
-
STL
2h 05mnonstop
Southwest Logo
2:15 pm - 9:10 pm
STL
-
AUS
6h 55m
1 stop
$199Southwest
Fri, Mar 6 - Wed, Mar 18
Multiple Airlines Logo
10:45 pm - 9:49 am
AUS
-
STL
11h 04m
1 stop
Multiple Airlines Logo
11:32 am - 12:24 am
STL
-
AUS
12h 52m
2 stops
$200Multiple Airlines
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.

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 February, where the average cost of round-trip tickets is $379 and $359 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 $339 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 48% 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$66
Best time to beat the crowds with an average 18% drop in price.
Most popular time to fly and prices are also 2% 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 $66 for a one-way ticket and $160 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?

    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 $325 and an overall rating of 8.0, Southwest is the most popular choice. United Airlines is also a great choice for the route, with an average price of $336 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 $251 or less one-way and $276 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 4298 reviews
7.5Entertainment
8.6Crew
8.1Boarding
8.0Comfort
7.0Food
Airline reviews

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.

4.0 Okaybyron, Feb 2026
DAL - SAT
Read more Southwest reviews

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 plane, great attendants,great flight crew,on time. Wonderful flight home..

I was assigned seat 7E, yet my boarding was Group 5, which caused me to have to put my luggage in the back of the plance above `19 or 20 aisle, as passengers who had boarded earlier took the overhead bins in the front. SW needs to monitor bin space and ensure that bin space above the seat are aligned to those sitting near their seats. Also the seating assignments needs to align with group number. Maybe board those last first and so on? Having said the ALL the passengers on the plane were gracious enough to allow me and other passengers in this dilema to retrieve our luggage and helped us along the way. I always love the flight staff, as always their fantastic and I can't rave about them enough!

Everything went smoothly and we even arrived a little bit early.

Great vacation. Can't wait till next year for another one.

The flight crew was extremely rude and especially not helpful when our flight was delayed.

Check-in, Boarding and flight were smooth. All the employees and crew was very nice and funny. They gave the kids crayons and workbooks to keep them occupied which was a big win. I’ve flown Southwest many times and that’s the first time I’ve seen that and it is a great addition.

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.

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.

Delayed, toilets did not flush, pilot parked to far away from Gate

I like flying first class, and United has a nice one

Unbelievably poor service from flight attendants. They didn’t even do water service on a four hour flight. Just disrespectful.

Essy to get on. The hostess gave very little pop, the plane was late getting in, and we are still waiting for our bags. This sucks. :/

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.

We arrived 25 minutes early only to be told our gate was occupied and so we sat for close to 30 minutes to pull into a gate. That’s not an early arrival!

The TSA check in took 1.5 hours to get through in Austin and I missed my flights back to DC

There was free WiFi (definitely a plus), but the flight was delayed 45 minutes waiting on a catering truck that never arrived. The pilot said there would be food vouchers given out at the end of the gangway to make up for the inconvenience, but there was no one offering those. Delay made me late for work!

Flight was on time and there was an empty seat next to me. That makes for a good flight!

We lost a day of our vacation because AA did not get the plane to the gate on time. Even though the gate attendant was very clear that it was not weather related, AA would do nothing because there was some snow that day. They basically said the gate attendant was wrong even though she was on the front line of the situation and they were not.

Boarding delayed 20 minutes for no reason, no wifi, in flight entertainment, or snacks / waters?

The seats are too uncomfortable for anyone over 5ft 8in. I'm 5'10" with a back and hip issue and I was in pai for the full duration of the flight.

Flight was on time and the meal and service were good.

the plane was so hot!! the air-conditioning was barely blowing. The flight was delayed, and we had to sit on the hot plane before take off for an extended amount of time, waiting on international passengers. Would not have been so bad if it was not so hot. They said it would get better after take off, but it did not.

did not have enough meal for first class passengers so offer us snack

Gate not determined until I got to the airport - hard to plan the trip to the airport.

Our flight was canceled. I will never use Kayak nor Frontier for travel again. The entire experience was a headache.

Frontier.. nickel and dime add-ons. Flight late, on time, late again, last minute gate change, arrival gate required a shuttle to the terminal. They sure keep you guessing.. if you like a little chaos and airport anxiety, this is the airline for you!

This is my second time flying with Frontier. My current experience was very favorable. The staff from the gate to the plane was friendly, warm and professional. The food options lacked in my opinion. This area needs some attention in my opinion.

There was no food and no entertainment, so I'm not sure why these are even in the survey, as my understanding is frontier does not ever offer food without a few, not even a snack, and there are no screens so unless the flight safety talk is our entertainment why ask how we liked it?. One of the flight attendants say in the back of the plane as people filed in to their seats, yelling orders about where to put baggage and telling people to hurry up. It was the least professional experience I've ever had on a flight.

Very well recently! Frontier is improving and less harrassing customer on luggages! Positive!

Good for a budget airline! It was easy to get on, staff was really nice. Can’t say anything about the food or entertainment because it wasn’t available, which is fine.

I am writing to express my disappointment with my recent Frontier Airlines flight. I was charged $99 at the gate because my bag was said to be too large, yet once onboard there was no available overhead bin space, and I was required to place the bag under the seat in front of me anyway. This made the charge feel unnecessary and unfair. Additionally, before the flight even took off, I was asked to move from the seat I paid for into a middle seat so another passenger and her cat could have my seat to themselves. I was not offered compensation or an explanation for being moved from a paid seat. Between the unexpected bag fee and being forced to give up my seat, this experience fell well below acceptable customer service standards. I would appreciate a review of this situation and appropriate compensation.

It was costly and difficult to check in. $85 to take a small suitcase with me, carry on or checked and $75 on the return trip, Plus $25 if I didn't check my self in check in $25, because I couldn't do it on the kiosk. Small very uncomfortable seats, waited on the runway for near an hour each way. It was my worst flight to date.

It was ok. It was expensive to check 2 bags ($75.00 per bag), and then it took a long time to wait for shuttle to take us from one terminal to the terminal where the plane was taking off at LAX. And all of this for a flight where we had to pay for any food or drink that was not water.

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

Information on your arrival and departure airports