Cheap flights from St. Louis to Austin from $86
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Austin departing on 5/17. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
Discover deals from 900+ travel sites with momondo.
Save money when you book flights with momondo
Big names and deals
Big names and deals
Search 100s of travel sites to compare prices.Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customize your results.Trusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.Price Alerts
Price Alerts
Not ready to book? to track prices.Find the cheapest flights from St. Louis to Austin
Cheap round-trip flights
Cheap one-way flights
Cheap last minute flights
Cheap direct flights
Delta flights from St. Louis to Austin
Our best Delta deals on St. Louis to Austin flight tickets
Southwest flights from St. Louis to Austin
Our best Southwest deals on St. Louis to Austin flight tickets
See travel insights to Austin from
How to get the cheapest flight ticket from St. Louis to Austin
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 Austin?
The cheapest month to fly to Austin from St. Louis is in May. Flight prices, which tend to average around $283, are often lower during this time because this is during the off-season. If you’re not able to fly to Austin in May, then September is your next best option. Flight prices from St. Louis to Austin during September average around $284.
What is the cheapest day to depart on your flight to Austin?
The cheapest day to depart on your flight to Austin is on a Monday when prices can be found for as low as $312. This is often the case because there is less demand to fly during this day of the week. When flying out on a Friday, the most expensive travel day of the week, you can expect to see flight prices from St. Louis to Austin for around $384.
What is the cheapest time of day to depart on your flight to Austin?
In the evening is the cheapest time of day to fly from St. Louis to Austin when you can find flight prices for as low as $355. Flying to Austin in the evening is an ideal time because this is during off-peak travel hours. Flights to Austin are more costly at noon, with an average ticket price of $373. Departure times at noon fall within the peak daily travel times, which is why tickets can be more expensive.
What is the cheapest Lambert-St Louis to Austin Bergstrom flight route?
Fly from Lambert-St Louis to Austin Bergstrom for the best Lambert-St Louis - Austin Bergstrom flight prices
How far in advance should I book a flight to Austin?
You are more likely to see cheaper flights to Austin from St. Louis when booking 17 weeks ahead of your departure date. In general, you can expect to find flights to Austin for around $314 when searching 17 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Austin from St. Louis for as low as $263 on momondo.
What cabin class options are available on Lambert-St Louis to Austin Bergstrom flights?
There are 1 cabin classes available to choose from on Lambert-St Louis to Austin Bergstrom 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 Lambert-St Louis to Austin Bergstrom?
Spirit Airlines, Frontier, and Southwest are the most popular carriers operating from Lambert-St Louis to Austin Bergstrom
What airlines fly to Austin?
American Airlines, Southwest and United Airlines are the top three most popular airlines that fly to Austin from St. Louis according to our data. American Airlines is the first choice among our users, with 43% of people opting to fly with this airline when traveling to Austin. Keep in mind that there are 5 different airlines that fly to Austin on a routine basis, so you have a few additional options to choose from.
How many flights depart from St. Louis to Austin on average per day?
2 flights are operational daily from St. Louis to Austin as of April 2025. The most popular departure time for this route is 6:00AM, with 50% of flights per day taking off at noon.
How many flights depart from St. Louis to Austin on average per week?
As of April 2025, there are 15 flights per week flying from St. Louis to Austin. The most common day of the week flights depart is Mon, with 20% of flights taking off on this day.
When to book flights from St. Louis to Austin
Cheap St. Louis to Austin (STL to AUS) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from St. Louis to Austin
How far is Lambert-St Louis to Austin Bergstrom by plane?
The straight-line distance from Lambert-St Louis to Austin Bergstrom is 718.3 mi. Flights usually cover this in 2h 00m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from Lambert-St Louis Airport to Austin Bergstrom Airport?
Prices for flights from Lambert-St Louis Airport to Austin Bergstrom Airport refresh daily.
How many operators does momondo search for flights from Lambert-St Louis Airport to Austin Bergstrom Airport?
There are 5 operators available for flights from Lambert-St Louis Airport to Austin Bergstrom Airport as of April 2025.
How old do you have to be to fly from Lambert-St Louis Airport to Austin Bergstrom Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Lambert-St Louis Airport to Austin Bergstrom Airport.
What documentation or ID do you need to fly to Austin Bergstrom Airport?
The travel and health documents required for your trip to Austin Bergstrom Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Austin Bergstrom Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular plane model from St. Louis to Austin?
Based on momondo bookings for flights between St. Louis and Austin, the leading plane model is Boeing 737-700 Passenger/BBJ1 (winglets), making up 50.00% of the total bookings. Other popular models include Boeing 737-800 Passenger/BBJ2 (winglets) with 32.11%, Boeing 737 MAX 8 with 9.17%, and Boeing 737-800 with 1.83%.
What is the most popular airline from St. Louis to Austin?
Based on momondo bookings for flights between St. Louis and Austin, the leading airline is Southwest, making up 56% of the total bookings. Other popular airlines include American Airlines with 29%, United Airlines with 7%, and Delta with 4%.
Best airlines flying from St. Louis to Austin
Compare and see reviews for airlines that fly from St. Louis to Austin with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $134 | Free Cancellation | Rating 6.0 3,281 reviews | |||
| PriceFrom $196 | Free Cancellation | Rating 8.0 7,916 reviews | |||
| PriceFrom $212 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $219 | Free Cancellation | Rating 8.0 4,280 reviews | |||
| PriceFrom $256 | Free Cancellation | Rating 7.4 8,667 reviews |
Southwest Flights From St. Louis to Austin
Southwest flight deals from St. Louis to Austin start from $219 round-trip. Over the 15 Southwest flights for this route in a normal week, average airfare is usually $340 round-trip - but some users have found much cheaper deals with momondo.
Traveling to a place near Austin?
Book flights to Austin if you plan to visit one of these locationsWhy use momondo?
Why should I use momondo to find a flight deal from St. Louis to Austin?
To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Austin from St. Louis.
Can I find flights from St. Louis to Austin with flexible booking policies on momondo?
momondo does allow users to show only those flights to Austin from St. Louis which offer a flexible booking policy as well as other useful filters and features.
How can momondo help me find flights from St. Louis to Austin?
momondo helps you find the best flight between St. Louis and Austin by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.
I’m not ready to book a flight from St. Louis to Austin right now. Can momondo alert me if prices change?
Of course. momondo tracks the price of St. Louis to Austin flights. All you need is a valid email address and we will do the rest; it is that quick and easy.