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

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      Travellers and cabin class, 1 Adult, Economy
      Southwest Airlines

      Compare Austin-Bergstrom to St Louis flight deals

      Find the cheapest month or even day of the year to fly to St Louis

      Book the best St Louis fare with no extra fees

      Flight deals from Austin-Bergstrom to St Louis

      Looking for a cheap last-minute deal or the best return flight from Austin-Bergstrom Airport to St Louis Airport? If you want to travel next month, return fares start from $258. Find the lowest prices on one-way and return tickets right here.
      St Louis.$203 per passenger.Departing Wed, 28 Oct, returning Thu, 5 Nov.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Austin-Bergstrom on Wed, 28 Oct, arriving in St Louis.Inbound indirect flight with Frontier Airlines, departs from St Louis on Thu, 5 Nov, arriving in Austin-Bergstrom.Price includes taxes and charges.From $203, select.
      St Louis.$244 per passenger.Departing Fri, 13 Nov, returning Mon, 16 Nov.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Austin-Bergstrom on Fri, 13 Nov, arriving in St Louis.Inbound indirect flight with Frontier Airlines, departs from St Louis on Mon, 16 Nov, arriving in Austin-Bergstrom.Price includes taxes and charges.From $244, select.
      St Louis.$257 per passenger.Departing Fri, 16 Oct, returning Mon, 19 Oct.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Austin-Bergstrom on Fri, 16 Oct, arriving in St Louis.Inbound indirect flight with Frontier Airlines, departs from St Louis on Mon, 19 Oct, arriving in Austin-Bergstrom.Price includes taxes and charges.From $257, select.
      St Louis.$297 per passenger.Departing Thu, 5 Nov, returning Tue, 10 Nov.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Austin-Bergstrom on Thu, 5 Nov, arriving in St Louis.Inbound direct flight with Southwest Airlines departs from St Louis on Tue, 10 Nov, arriving in Austin-Bergstrom.Price includes taxes and charges.From $297, select.
      St Louis.$301 per passenger.Departing Tue, 27 Oct, returning Mon, 2 Nov.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Austin-Bergstrom on Tue, 27 Oct, arriving in St Louis.Inbound direct flight with Southwest Airlines departs from St Louis on Mon, 2 Nov, arriving in Austin-Bergstrom.Price includes taxes and charges.From $301, select.
      St Louis.$306 per passenger.Departing Sat, 24 Oct, returning Mon, 26 Oct.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Austin-Bergstrom on Sat, 24 Oct, arriving in St Louis.Inbound direct flight with Southwest Airlines departs from St Louis on Mon, 26 Oct, arriving in Austin-Bergstrom.Price includes taxes and charges.From $306, select.
      St Louis.$348 per passenger.Departing Fri, 11 Dec, returning Fri, 25 Dec.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Austin-Bergstrom on Fri, 11 Dec, arriving in St Louis.Inbound indirect flight with Frontier Airlines, departs from St Louis on Fri, 25 Dec, arriving in Austin-Bergstrom.Price includes taxes and charges.From $348, select.
      St Louis.$356 per passenger.Departing Fri, 8 Jan, returning Fri, 22 Jan.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Austin-Bergstrom on Fri, 8 Jan, arriving in St Louis.Inbound direct flight with Southwest Airlines departs from St Louis on Fri, 22 Jan, arriving in Austin-Bergstrom.Price includes taxes and charges.From $356, select.
      St Louis.$362 per passenger.Departing Sat, 6 Feb, returning Sun, 21 Feb.Return flight with United.Outbound indirect flight with United, departs from Austin-Bergstrom on Sat, 6 Feb, arriving in St Louis.Inbound indirect flight with United, departs from St Louis on Sun, 21 Feb, arriving in Austin-Bergstrom.Price includes taxes and charges.From $362, select.
      St Louis.$362 per passenger.Departing Fri, 20 Nov, returning Tue, 1 Dec.Return flight with United.Outbound indirect flight with United, departs from Austin-Bergstrom on Fri, 20 Nov, arriving in St Louis.Inbound indirect flight with United, departs from St Louis on Tue, 1 Dec, arriving in Austin-Bergstrom.Price includes taxes and charges.From $362, select.
      St Louis.$364 per passenger.Departing Fri, 11 Dec, returning Fri, 25 Dec.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Austin-Bergstrom on Fri, 11 Dec, arriving in St Louis.Inbound direct flight with Southwest Airlines departs from St Louis on Fri, 25 Dec, arriving in Austin-Bergstrom.Price includes taxes and charges.From $364, select.
      St Louis.$411 per passenger.Departing Mon, 28 Sep, returning Wed, 30 Sep.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Austin-Bergstrom on Mon, 28 Sep, arriving in St Louis.Inbound indirect flight with Frontier Airlines, departs from St Louis on Wed, 30 Sep, arriving in Austin-Bergstrom.Price includes taxes and charges.From $411, select.
      St Louis.$414 per passenger.Departing Fri, 9 Apr, returning Fri, 23 Apr.Return flight with Delta.Outbound indirect flight with Delta, departs from Austin-Bergstrom on Fri, 9 Apr, arriving in St Louis.Inbound indirect flight with Delta, departs from St Louis on Fri, 23 Apr, arriving in Austin-Bergstrom.Price includes taxes and charges.From $414, select.
      St Louis.$414 per passenger.Departing Fri, 14 May, returning Fri, 28 May.Return flight with Delta.Outbound indirect flight with Delta, departs from Austin-Bergstrom on Fri, 14 May, arriving in St Louis.Inbound indirect flight with Delta, departs from St Louis on Fri, 28 May, arriving in Austin-Bergstrom.Price includes taxes and charges.From $414, select.
      St Louis.$431 per passenger.Departing Tue, 29 Sep, returning Fri, 2 Oct.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Austin-Bergstrom on Tue, 29 Sep, arriving in St Louis.Inbound indirect flight with Frontier Airlines, departs from St Louis on Fri, 2 Oct, arriving in Austin-Bergstrom.Price includes taxes and charges.From $431, select.
      St Louis.$441 per passenger.Departing Fri, 11 Jun, returning Fri, 25 Jun.Return flight with Delta.Outbound indirect flight with Delta, departs from Austin-Bergstrom on Fri, 11 Jun, arriving in St Louis.Inbound indirect flight with Delta, departs from St Louis on Fri, 25 Jun, arriving in Austin-Bergstrom.Price includes taxes and charges.From $441, select.
      How did we find these deals? The deals you see here are the lowest prices for flight tickets from Austin-Bergstrom to St Louis found in the last 4 days, and are subject to change and availability.

      Find the cheapest month to fly from Austin-Bergstrom to St Louis

      We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Austin-Bergstrom to St Louis flights are currently cheapest in November.
      Sep
      from $411
      Oct
      from $257
      Nov
      from $244
      Dec
      from $348
      Jan
      from $356
      Feb
      from $362
      Mar
      from $497
      Apr
      from $414
      May
      from $414
      Jun
      from $441
      Jul
      Find prices
      Aug
      Find prices

      Direct flights from Austin-Bergstrom to St Louis

      Southwest Airlines

      Austin-Bergstrom to St Louis: Alternative routes

      Compare routes from Austin-Bergstrom to St Louis below. You may find an airport to fly into that's cheaper, faster, or easier than St Louis.

      St Louis

      20km from central St Louis
      ClosestCheapest
      from $203
      Search flights

      Belleville

      32km from central St Louis
      Search flights

      Austin to St Louis: Flight information

      The things to know before you go.
      Cheapest flight found$203
      Cheapest month to flyOctober
      Average flight time2 hrs, 4 mins
      Most popular airlineSouthwest Airlines
      Average flights per week18

      Finding cheap flights from Austin-Bergstrom to St Louis: Frequently asked questions

      The best price we found for a return flight from Austin-Bergstrom to St Louis is $204. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
      2 hours and 4 minutes is the average flight time from Austin-Bergstrom to St Louis.
      Southwest Airlines flies direct from Austin-Bergstrom to St Louis.
      As of September 2026, there are 18 flights per week flying from Austin-Bergstrom to St Louis.
      The cheapest month to fly from Austin-Bergstrom to St Louis is usually October.
      After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Austin-Bergstrom Airport to St Louis Airport on Wednesday, 28 October 2026.
      Yes – the average flight time is 2 hours and 4 minutes.
      We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to St Louis but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.

      We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to St Louis is around 40 days in advance, so don’t leave your flight to the last minute.

      Currently, Frontier Airlines and Southwest Airlines offer the cheapest flight tickets to St Louis.

      Flying from Austin-Bergstrom Airport (AUS) to St Louis Airport (STL): what you need to know

      • The average duration of a direct flight from Austin-Bergstrom Airport to St Louis Airport is 2 hours 5 minutes.

      • Austin and St Louis are in the UTC-6 timezone. That means you won't have to change your watch when you arrive.

      • You can choose from 11 weekly Austin-Bergstrom Airport to St Louis Airport flights. The 05:00 departure with Southwest Airlines is the earliest flight you can take. Southwest Airlines operates the latest service of the day at 18:20.

      • Arrive at the airport on time so you don't miss your AUS to STL flight. Be there at least two hours ahead for international flights and an hour early for domestic departures to avoid any last-minute rush.

      • During popular months like July, it's a good idea to get to the airport earlier than usual. Plan to arrive two hours before a domestic departure and four hours ahead of international flights whenever you're flying during a peak period in general.

      • Southwest Airlines offers direct flights from Austin-Bergstrom Airport to St Louis Airport. Book with this popular airline, then get ready to see the sights in St Louis — and maybe even more of the United States if you have time.

      • The airline most travellers fly with on this route is Southwest Airlines.

      • Southwest Airlines is the most punctual carrier that offers AUS to STL flights, with 79.94% of its services arriving as planned.

      • If you'd like to break up your flight, simply deselect 'Direct flights only' when searching for your ticket from Austin-Bergstrom Airport to St Louis Airport. Here are the top stopovers between AUS and STL:

        • Dallas Fort Worth International Airport

        • Houston George Bush Intercntl. Airport

        • Tulsa International Airport

      How to find the cheapest flights from Austin-Bergstrom Airport (AUS) to St Louis Airport (STL)

      • Right now, $120 is the lowest price we've seen for a one-way Austin-Bergstrom Airport to St Louis Airport flight. The best price for a return ticket is $204. Remember that fares could change due to demand when booking.

      • Get cheap tickets from AUS to STL by booking at least three months ahead. Based on our research, that's the sweet spot for finding the biggest deals.

      • The cheapest month for flights from Austin-Bergstrom Airport to St Louis Airport is August. Use the 'Whole month' tool to find the lowest airfares if you have flexible travel dates.

      • Cut down on the time spent looking for cheap flights from AUS to STL by setting up a Price Alert. You'll receive an email or notification on the app when a lower fare becomes available.

      • Choose your ideal departure and arrival times, number of stops and airlines with the filters. Or sort your results by 'Cheapest' to see the best deals on flights from Austin-Bergstrom Airport to St Louis Airport.

      Handy information about Austin-Bergstrom Airport (AUS)

      • AUS's address is 3600 Presidential Blvd.

      • Of the flights that depart from Austin-Bergstrom Airport, 77% land on schedule at their destination.

      • Austin-Bergstrom Airport is around 16 kilometres from central Austin. If you're catching a taxi, ride-sharing or driving from the centre, it'll take 20 minutes or so to get there, depending on the traffic.

      • Expect a journey time of about 45 minutes on public transport.

      • Get your trip off to a leisurely start by staying near AUS. Whether you're boarding an early flight from Austin-Bergstrom Airport to St Louis Airport or just don't want to be rushed, these stays are ideal:

      Arriving at St Louis Airport (STL)

      Getting from St Louis Airport (STL) to central St Louis

      • STL is located at 10701 Lambert International Blvd..

      • St Louis Airport to the centre of St Louis has a drive time of around 25 minutes. It's approximately 24 kilometres away.

      • Getting there by public transport typically takes 30 minutes.

      When to fly to St Louis Airport (STL)

      • The quietest month for a flight from Austin-Bergstrom Airport to St Louis Airport is March, while July is the busiest. Choose the ideal time to visit St Louis based on whether you prefer a more relaxed vibe or a faster pace.

      • The warmest month in St Louis is July, with the temperature ranging between 17ºC (63ºF) and 33ºC (91ºF). Book your flights from Austin-Bergstrom Airport to St Louis Airport in this month if you enjoy this type of weather.

      • Search for cheap tickets from AUS to STL in January if you like cooler conditions. Temperatures are at their lowest around then, ranging between -7ºC (19ºF) and 8ºC (46ºF) on average.

      Explore more of the United States

      • Chicago is just one of the many places in the United States waiting to be discovered after you've seen St Louis. Around 418 kilometres away to the north-east, check out popular attractions including Millennium Park, Art Institute of Chicago and Willis Tower.

      • Around 370 kilometres east of St Louis, Indianapolis is another favourite stop in the United States. Experience this destination's highlights firsthand at Lucas Oil Stadium, Eiteljorg Museum and The Children's Museum of Indianapolis.

      Plan smart, explore more

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      Plan the rest of your trip from Austin to St Louis

      Prices shown on this page are estimated lowest prices only. Found in the last 12 days.