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£319 Cheap Flights from Austin (AUS) to St. Louis (STL)

View £319 flight on Mon, 16 Nov 2026Opens in a new window

Popular airlines from Austin-Bergstrom International Airport (AUS) to Lambert-St. Louis International Airport (STL)

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

Prices were available within the past 7 days and start at £319 for one-way flights and £532 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Thu, 24 Sept - Wed, 30 Sept
AUS
Austin
STL
St. Louis
£532 Return, found 4 days ago
£532
Return
found 4 days ago
Select Alaska Airlines flight, departing Thu, 24 Sept from Austin to St. Louis, returning Wed, 30 Sept, priced at £532 found 4 days ago
Alaska Airlines
Thu, 24 Sept - Wed, 30 Sept
AUS
Austin
STL
St. Louis
£544 Return, found 6 days ago
£544
Return
found 6 days ago
Select Alaska Airlines flight, departing Thu, 24 Sept from Austin to St. Louis, returning Wed, 30 Sept, priced at £544 found 6 days ago
Alaska Airlines
Thu, 24 Sept - Wed, 30 Sept
AUS
Austin
STL
St. Louis
£544 Return, found 14 hours ago
£544
Return
found 14 hours ago
Select Alaska Airlines flight, departing Thu, 24 Sept from Austin to St. Louis, returning Wed, 30 Sept, priced at £544 found 14 hours ago
Alaska Airlines
Thu, 24 Sept - Tue, 29 Sept
AUS
Austin
STL
St. Louis
£545 Return, found 1 day ago
£545
Return
found 1 day ago
Select Alaska Airlines flight, departing Thu, 24 Sept from Austin to St. Louis, returning Tue, 29 Sept, priced at £545 found 1 day ago
Alaska Airlines
Thu, 24 Sept - Wed, 30 Sept
AUS
Austin
STL
St. Louis
£577 Return, found 4 days ago
£577
Return
found 4 days ago
Select Alaska Airlines flight, departing Thu, 24 Sept from Austin to St. Louis, returning Wed, 30 Sept, priced at £577 found 4 days ago
Alaska Airlines
Thu, 24 Sept - Tue, 29 Sept
AUS
Austin
STL
St. Louis
£589 Return, found 3 days ago
£589
Return
found 3 days ago
Select Alaska Airlines flight, departing Thu, 24 Sept from Austin to St. Louis, returning Tue, 29 Sept, priced at £589 found 3 days ago
Alaska Airlines
Thu, 24 Sept - Tue, 29 Sept
AUS
Austin
STL
St. Louis
£619 Return, found 1 day ago
£619
Return
found 1 day ago
Select Alaska Airlines flight, departing Thu, 24 Sept from Austin to St. Louis, returning Tue, 29 Sept, priced at £619 found 1 day ago
Alaska Airlines
Thu, 24 Sept - Wed, 30 Sept
AUS
Austin
STL
St. Louis
£630 Return, found 14 hours ago
£630
Return
found 14 hours ago
Select Alaska Airlines flight, departing Thu, 24 Sept from Austin to St. Louis, returning Wed, 30 Sept, priced at £630 found 14 hours ago
Alaska Airlines
Thu, 24 Sept - Wed, 30 Sept
AUS
Austin
STL
St. Louis
£644 Return, found 4 days ago
£644
Return
found 4 days ago
Select Alaska Airlines flight, departing Thu, 24 Sept from Austin to St. Louis, returning Wed, 30 Sept, priced at £644 found 4 days ago
Alaska Airlines
Thu, 24 Sept - Tue, 29 Sept
AUS
Austin
STL
St. Louis
£655 Return, found 3 days ago
£655
Return
found 3 days ago
Select Alaska Airlines flight, departing Thu, 24 Sept from Austin to St. Louis, returning Tue, 29 Sept, priced at £655 found 3 days ago

Frequently asked questions

How much does a flight from Austin, TX (AUS-Austin-Bergstrom Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) cost?
You can find one-way and return flights from AUS to STL with Expedia. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see our cheapest fares first, and use the Price Tracking tool to receive alerts when AUS to STL ticket fares go up or down.
What is the cheapest month to fly from Austin, TX (AUS) to St. Louis, MO (STL)?
The cheapest months to fly from Austin, TX (AUS) to St. Louis, MO (STL) are typically during off-peak season when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you are able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Austin, TX (AUS) to St. Louis, MO (STL)?
Enter AUS to STL and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
What is the cheapest airline that flies from Austin, TX (AUS-Austin-Bergstrom Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
Frontier Airlines is one of the cheapest airlines offering connecting return flights on this route, with tickets starting from around £104. Louis Intl.), with tickets starting from around £141 for flights that can be booked for departure within the next year. Southwest Airlines is one of the cheapest airlines offering nonstop return flights from Austin, TX (AUS-Austin-Bergstrom Intl.) to St. Louis, MO (STL-Lambert-St. These prices are per adult for economy/coach class. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.
How do I find cheap flights from Austin, TX (AUS-Austin-Bergstrom Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
To find a cheap flight from Austin, TX (AUS-Austin-Bergstrom Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from Austin, TX (AUS-Austin-Bergstrom Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
The best time to fly from Austin-Bergstrom Intl. (AUS) to Lambert-St. Louis Intl. (STL) is typically September or May. These months offer a great balance, with average return flight prices around £201. You'll also find plenty of flight options during these times, making it easier to plan your trip. If you're flexible, these months give you both affordable fares and excellent flight schedules to work with.
How many flights per day from Austin, TX (AUS-Austin-Bergstrom Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
You'll find approximately 3 nonstop flights per day from Austin-Bergstrom Intl. (AUS) to Lambert-St. Louis Intl. (STL). For even more choices, look at flights that include layovers, as there are around 126 connecting flights per day. Some common connection points include Dallas-Fort Worth Intl. (DFW), Hartsfield-Jackson Atlanta Intl. (ATL), and O'Hare Intl. (ORD).
What is the earliest flight from Austin, TX (AUS) to St. Louis, MO (STL)?
Sort flights by "Departure (earliest)" on Expedia to find the earliest flight from Austin, TX (AUS) to St. Louis, MO (STL). To compare more early flights, use the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from Austin, TX (AUS-Austin-Bergstrom Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
You'll find the most flights from Austin-Bergstrom Intl. (AUS) to Lambert-St. Louis Intl. (STL) on a Friday, with around 79 flights available. This gives you plenty of options for your travel plans. Major airlines on this route include Southwest Airlines, American Airlines, and United. Fridays also have notably more flight options compared to other days of the week, making it a popular choice for travellers.
What are the most popular departure times for flights from Austin, TX (AUS-Austin-Bergstrom Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
The most popular departure times for flights from Austin-Bergstrom Intl. (AUS) to Lambert-St. Louis Intl. (STL) are in the late afternoon, from 3pm to 6pm. Many major carriers, including Southwest Airlines, American Airlines and United, offer flights during this window. Many travellers prefer these times as they allow for a full day of activities before heading to the airport, and you'll arrive in St. Louis in the evening.
How long does it take to fly from Austin, TX (AUS-Austin-Bergstrom Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
A nonstop flight from AUS to STL typically takes around 2 hours, covering approximately 1,160 kilometers. Connecting flights on this route usually add 3 hours 30 minutes to your travel time. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Austin, TX (AUS-Austin-Bergstrom Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
Yes, you can fly business class or first class between AUS and STL. You can fly business class with Frontier Airlines and Delta.First class cabins are available on Spirit Airlines, Alaska Airlines, Delta, United, and American Airlines.
How do I earn miles on a Austin, TX (AUS) to St. Louis, MO (STL) flight with Expedia?
It's easy to earn miles on a Austin, TX (AUS) to St. Louis, MO (STL) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
Is it cheaper to buy a plane ticket from Austin, TX (AUS) to St. Louis, MO (STL) at the last minute?
Typically, booking a last minute flight from Austin, TX (AUS) to St. Louis, MO (STL) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Austin, TX (AUS) to St. Louis, MO (STL) flight and hotel package?
Securing a Austin, TX (AUS) to St. Louis, MO (STL) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Austin, TX (AUS-Austin-Bergstrom Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
If you booked your Austin, TX (AUS-Austin-Bergstrom Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Austin-Bergstrom Intl.
Destination airport
Lambert-St. Louis Intl.
Airlines serving
Alaska Airlines
Return price
£531
Distance
1153 km
Average flight time
2 hours 53 mins

Book with confidence

Compare flights from Austin to St. Louis easily and book with confidence

For travelling on business or for pleasure, Expedia makes it easy to book your flights from Austin to St. Louis. Operating between them flights per day, 20 airlines cover the route. And fly direct, getting you to Lambert-St. Louis Intl. in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Austin-Bergstrom Intl. to Lambert-St. Louis Intl..  

To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights. 

Grab a great deal on your flight from Austin-Bergstrom Intl. (AUS) to Lambert-St. Louis Intl. (STL)

The easiest way to view the best deals on flights from Austin to St. Louis today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from Austin-Bergstrom Intl. to Lambert-St. Louis Intl. start at just £532 and range up to £655.  

To find an even better deal, try  

  • being flexible on your dates – midweek flights can be cheaper
  • looking for other airports near Austin and St. Louis
  • booking your flight during September, the cheapest month on this route
  • varying your flight times – early morning and late at night are sometimes cheaper 

Why you should book your Austin to St. Louis flight with Expedia!

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Austin-Bergstrom Intl. to Lambert-St. Louis Intl. for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.  

Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.  

Compare flights from Austin to St. Louis easily and book with confidence

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*Available to Expedia members.