Cheap flights from Austin-Bergstrom to St Louis

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Compare Austin-Bergstrom to St Louis flight deals

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Flight deals from Austin-Bergstrom to St Louis

Looking for a cheap last-minute deal or the best round-trip flight from Austin-Bergstrom Airport to St Louis Airport? If you want to travel next month, round-trip fares start from $183. Find the lowest prices on one-way and round-trip tickets right here.

St Louis.$145 per passenger.Departing Wed, Oct 28, returning Thu, Nov 5.Round-trip flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departing from Austin-Bergstrom on Wed, Oct 28, arriving in St Louis.Inbound indirect flight with Frontier Airlines, departing from St Louis on Thu, Nov 5, arriving in Austin-Bergstrom.Price includes taxes and charges.From $145, select.

St Louis.$156 per passenger.Departing Thu, Nov 5, returning Mon, Nov 9.Round-trip flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departing from Austin-Bergstrom on Thu, Nov 5, arriving in St Louis.Inbound indirect flight with Frontier Airlines, departing from St Louis on Mon, Nov 9, arriving in Austin-Bergstrom.Price includes taxes and charges.From $156, select.

St Louis.$183 per passenger.Departing Fri, Oct 16, returning Mon, Oct 19.Round-trip flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departing from Austin-Bergstrom on Fri, Oct 16, arriving in St Louis.Inbound indirect flight with Frontier Airlines, departing from St Louis on Mon, Oct 19, arriving in Austin-Bergstrom.Price includes taxes and charges.From $183, select.

St Louis.$211 per passenger.Departing Thu, Nov 5, returning Tue, Nov 10.Round-trip flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departing from Austin-Bergstrom on Thu, Nov 5, arriving in St Louis.Inbound direct flight with Southwest Airlines departing from St Louis on Tue, Nov 10, arriving in Austin-Bergstrom.Price includes taxes and charges.From $211, select.

St Louis.$214 per passenger.Departing Tue, Oct 27, returning Mon, Nov 2.Round-trip flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departing from Austin-Bergstrom on Tue, Oct 27, arriving in St Louis.Inbound direct flight with Southwest Airlines departing from St Louis on Mon, Nov 2, arriving in Austin-Bergstrom.Price includes taxes and charges.From $214, select.

St Louis.$218 per passenger.Departing Sat, Oct 24, returning Mon, Oct 26.Round-trip flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departing from Austin-Bergstrom on Sat, Oct 24, arriving in St Louis.Inbound direct flight with Southwest Airlines departing from St Louis on Mon, Oct 26, arriving in Austin-Bergstrom.Price includes taxes and charges.From $218, select.

St Louis.$247 per passenger.Departing Fri, Dec 11, returning Fri, Dec 25.Round-trip flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departing from Austin-Bergstrom on Fri, Dec 11, arriving in St Louis.Inbound indirect flight with Frontier Airlines, departing from St Louis on Fri, Dec 25, arriving in Austin-Bergstrom.Price includes taxes and charges.From $247, select.

St Louis.$253 per passenger.Departing Fri, Jan 8, returning Fri, Jan 22.Round-trip flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departing from Austin-Bergstrom on Fri, Jan 8, arriving in St Louis.Inbound direct flight with Southwest Airlines departing from St Louis on Fri, Jan 22, arriving in Austin-Bergstrom.Price includes taxes and charges.From $253, select.

St Louis.$257 per passenger.Departing Sat, Feb 6, returning Sun, Feb 21.Round-trip flight with United.Outbound indirect flight with United, departing from Austin-Bergstrom on Sat, Feb 6, arriving in St Louis.Inbound indirect flight with United, departing from St Louis on Sun, Feb 21, arriving in Austin-Bergstrom.Price includes taxes and charges.From $257, select.

St Louis.$257 per passenger.Departing Fri, Nov 20, returning Tue, Dec 1.Round-trip flight with United.Outbound indirect flight with United, departing from Austin-Bergstrom on Fri, Nov 20, arriving in St Louis.Inbound indirect flight with United, departing from St Louis on Tue, Dec 1, arriving in Austin-Bergstrom.Price includes taxes and charges.From $257, select.

St Louis.$259 per passenger.Departing Fri, Dec 11, returning Fri, Dec 25.Round-trip flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departing from Austin-Bergstrom on Fri, Dec 11, arriving in St Louis.Inbound direct flight with Southwest Airlines departing from St Louis on Fri, Dec 25, arriving in Austin-Bergstrom.Price includes taxes and charges.From $259, select.

St Louis.$292 per passenger.Departing Mon, Sep 28, returning Wed, Sep 30.Round-trip flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departing from Austin-Bergstrom on Mon, Sep 28, arriving in St Louis.Inbound indirect flight with Frontier Airlines, departing from St Louis on Wed, Sep 30, arriving in Austin-Bergstrom.Price includes taxes and charges.From $292, select.

St Louis.$294 per passenger.Departing Fri, Apr 9, returning Fri, Apr 23.Round-trip flight with Delta.Outbound indirect flight with Delta, departing from Austin-Bergstrom on Fri, Apr 9, arriving in St Louis.Inbound indirect flight with Delta, departing from St Louis on Fri, Apr 23, arriving in Austin-Bergstrom.Price includes taxes and charges.From $294, select.

St Louis.$294 per passenger.Departing Fri, May 14, returning Fri, May 28.Round-trip flight with Delta.Outbound indirect flight with Delta, departing from Austin-Bergstrom on Fri, May 14, arriving in St Louis.Inbound indirect flight with Delta, departing from St Louis on Fri, May 28, arriving in Austin-Bergstrom.Price includes taxes and charges.From $294, select.

St Louis.$306 per passenger.Departing Tue, Sep 29, returning Fri, Oct 2.Round-trip flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departing from Austin-Bergstrom on Tue, Sep 29, arriving in St Louis.Inbound indirect flight with Frontier Airlines, departing from St Louis on Fri, Oct 2, arriving in Austin-Bergstrom.Price includes taxes and charges.From $306, select.

St Louis.$314 per passenger.Departing Fri, Jun 11, returning Fri, Jun 25.Round-trip flight with Delta.Outbound indirect flight with Delta, departing from Austin-Bergstrom on Fri, Jun 11, arriving in St Louis.Inbound indirect flight with Delta, departing from St Louis on Fri, Jun 25, arriving in Austin-Bergstrom.Price includes taxes and charges.From $314, select.

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.

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Direct flights from Austin-Bergstrom to St Louis

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 $145

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Belleville

32km from central St Louis

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Austin to St Louis: Flight information

The things to know before you go.

Cheapest flight found	$145
Cheapest month to fly	October
Average flight time	2 hrs, 4 mins
Most popular airline	Southwest Airlines
Average flights per week	18

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

How much are round-trip flights from Austin-Bergstrom to St Louis?

The best price we found for a round-trip flight from Austin-Bergstrom to St Louis is $145. 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.

How long does it take to fly from Austin-Bergstrom to St Louis?

2 hours and 4 minutes is the average flight time from Austin-Bergstrom to St Louis.

Which airlines fly direct from Austin-Bergstrom to St Louis?

Southwest Airlines flies direct from Austin-Bergstrom to St Louis.

How many flights are there a week from Austin-Bergstrom to St Louis?

There are 18 flights per week flying from Austin-Bergstrom to St Louis, as of September 2026.

When is the cheapest time to fly from Austin-Bergstrom to St Louis?

The cheapest month to fly from Austin-Bergstrom to St Louis is usually October.

Which upcoming date is cheapest to fly from Austin-Bergstrom Airport to St Louis Airport on?

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, October 28, 2026.

Can I get a direct flight from Austin-Bergstrom Airport to St Louis Airport?

Yes – the average flight time is 2 hours and 4 minutes.

How can I find the best flight deal to St Louis?

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.

When is the best time to book flights to St Louis?

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.

Which is the cheapest airline to fly with from Austin-Bergstrom Airport to St Louis?

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 travelers 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, $72 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 $145. 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 kilometers from central Austin. If you're catching a cab, ride-sharing or driving from the center, 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)

The last thing you need is a lengthy journey to your hotel if you're arriving on a late Austin-Bergstrom Airport to St Louis Airport flight. Check in to one of these accommodation options near STL instead:
Travel at your own pace with a St Louis Airport rental car. Pick up a set of wheels from Hertz, Budget or Alamo and see more of St Louis and beyond.
Secure the lowest price by reserving your vehicle from St Louis Airport around one week ahead of your trip.

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 kilometers away to the north-east, check out popular attractions including Millennium Park, Art Institute of Chicago and Willis Tower.
Around 370 kilometers east of St Louis, Indianapolis is another favorite stop in the United States. Experience this destination's highlights firsthand at Lucas Oil Stadium, Eiteljorg Museum and The Children's Museum of Indianapolis.