Cheap flights from Austin to St. Louis from $82
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Austin to St. Louis departing on 9/4. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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How to get the cheapest flight ticket from Austin to St. Louis
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly to St. Louis?
In general, July is the cheapest month to fly from Austin to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $293. The month of August is another great option to travel to St. Louis, with average flight prices from Austin averaging around $300.
What is the cheapest day to depart on your flight to St. Louis?
The cheapest day to depart on your flight to St. Louis is on a Tuesday when prices can be found for as low as $303. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $476. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.
What is the cheapest time of day to depart on your flight to St. Louis?
Flying to St. Louis from Austin in the evening is the least expensive time of day to depart. momondo users have found prices as low as $238 when looking at flights departing in the evening. At noon is when there is more demand to fly to St. Louis, so prices are often more expensive at around $417 per ticket.
What is the cheapest Austin Bergstrom to Lambert-St Louis flight route?
Fly from Austin Bergstrom to Lambert-St Louis for the best Austin Bergstrom - Lambert-St Louis flight prices
How far in advance should I book a flight to St. Louis?
You are more likely to see cheaper flights to St. Louis from Austin when booking 17 weeks ahead of your departure date. In general, you can expect to find flights to St. Louis for around $326 when searching 17 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to St. Louis from Austin for as low as $216 on momondo.
What cabin class options are available on Austin Bergstrom to Lambert-St Louis flights?
There are 1 cabin classes available to choose from on Austin Bergstrom to Lambert-St Louis flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
What is the cheapest airline that flies from Austin Bergstrom to Lambert-St Louis?
Spirit Airlines, Southwest, and American Airlines are the most popular carriers operating from Austin Bergstrom to Lambert-St Louis
What airlines fly to St. Louis?
American Airlines, Southwest and United Airlines are the top three most popular airlines that fly to St. Louis from Austin according to our data. American Airlines is the first choice among our users, with 44% of people opting to fly with this airline when traveling to St. Louis. Keep in mind that there are 5 different airlines that fly to St. Louis on a routine basis, so you have a few additional options to choose from.
How many flights depart from Austin to St. Louis on average per day?
As of June 2025, there are 2 flights per day flying from Austin to St. Louis. The most common time of day flights depart is 5:00PM, with 60% of flights taking off in the afternoon.
How many flights depart from Austin to St. Louis on average per week?
As of June 2025, 15 flights take off from Austin and land in St. Louis each week. The most common flight departure day for this route is Mon, with 20% of weekly flights taking off on this day.
When to book flights from Austin to St. Louis
Cheap Austin to St. Louis (AUS to STL) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Austin to St. Louis
How far is Austin Bergstrom to Lambert-St Louis by plane?
The distance between Austin Bergstrom and Lambert-St Louis is about 718.3 mi. Typically, this will take 2h 00m by plane in normal conditions.
When did momondo last update prices for flights from Austin Bergstrom Airport to Lambert-St Louis Airport?
Prices for flights from Austin Bergstrom Airport to Lambert-St Louis Airport were last updated today.
How many operators does momondo search for flights from Austin Bergstrom Airport to Lambert-St Louis Airport?
The number of operators available for flights from Austin Bergstrom Airport to Lambert-St Louis Airport is 5 as of June 2025.
How old do you have to be to fly from Austin Bergstrom Airport to Lambert-St Louis Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Austin Bergstrom Airport to Lambert-St Louis Airport.
What documentation or ID do you need to fly to Lambert-St Louis Airport?
The required travel and health documents for your Lambert-St Louis Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Lambert-St Louis Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from Austin to St. Louis?
Based on momondo bookings for flights between Austin and St. Louis, the leading plane model is Boeing 737-700 Passenger/BBJ1 (winglets), making up 22.45% of the total bookings. Other popular models include Boeing 737-800 Passenger/BBJ2 (winglets) with 17.13%, Boeing 737 MAX 8 with 15.28%, and Airbus A320-100/200 with 11.11%.
What is the most popular airline from Austin to St. Louis?
momondo data reveals that the most frequently booked airline on the route from Austin to St. Louis is Southwest, representing 56% of all bookings. The subsequent popular airlines are American Airlines at 31%, United Airlines at 7%, and Frontier at 3%.
Best airlines flying from Austin to St. Louis
Compare and see reviews for airlines that fly from Austin to St. Louis with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $139 | Free Cancellation | Rating 5.9 3,295 reviews | |||
| PriceFrom $194 | Free Cancellation | Rating 7.4 8,790 reviews | |||
| PriceFrom $196 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $198 | Free Cancellation | Rating 8.0 7,946 reviews | |||
| PriceFrom $223 | Free Cancellation | Rating 8.0 4,287 reviews |
Southwest Flights From Austin to St. Louis
Southwest flight deals from Austin to St. Louis start from $223 round-trip. Over the 15 Southwest flights for this route in a normal week, average airfare is usually $326 round-trip - but some users have found much cheaper deals with momondo.
Traveling to a place near St. Louis?
Book flights to St. Louis if you plan to visit one of these locationsWhy use momondo?
Why should I use momondo to find a flight deal from Austin to St. Louis?
Finding the right flight to St. Louis from Austin is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to St. Louis quick and easy, saving you time and money.
Can I find flights from Austin to St. Louis with flexible booking policies on momondo?
Yes. momondo enables you to select and highlight flights to St. Louis from Austin with this policy.
How can momondo help me find flights from Austin to St. Louis?
momondo provides multiple filters to help you find the best flight to St. Louis from Austin. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.
I’m not ready to book a flight from Austin to St. Louis right now. Can momondo alert me if prices change?
Of course. momondo tracks the price of Austin to St. Louis flights. All you need is a valid email address and we will do the rest; it is that quick and easy.