$134 Cheap Flights from Tucson (TUS) to St. Louis (STL)

View $134 flight on Wed, Jul 9, 2025Opens in a new window

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Cheap Flights from Tucson to St. Louis (TUS-STL)

Prices were available within the past 7 days and start at $134 for one-way flights and $188 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Thu, May 1 - Sat, May 10
TUS
Tucson
STL
St. Louis
$188 Roundtrip, found 10 hours ago
$188
Roundtrip
found 10 hours ago
Select Frontier Airlines flight, departing Thu, May 1 from Tucson to St. Louis, returning Sat, May 10, priced at $188 found 10 hours ago
Frontier Airlines
Thu, May 1 - Sat, May 3
TUS
Tucson
STL
St. Louis
$198 Roundtrip, found 10 hours ago
$198
Roundtrip
found 10 hours ago
Select Frontier Airlines flight, departing Thu, May 1 from Tucson to St. Louis, returning Sat, May 3, priced at $198 found 10 hours ago
Frontier Airlines
Sun, May 11 - Wed, May 14
TUS
Tucson
STL
St. Louis
$218 Roundtrip, found 7 hours ago
$218
Roundtrip
found 7 hours ago
Select Frontier Airlines flight, departing Sun, May 11 from Tucson to St. Louis, returning Wed, May 14, priced at $218 found 7 hours ago
Frontier Airlines
Thu, May 8 - Sat, May 10
TUS
Tucson
STL
St. Louis
$228 Roundtrip, found 3 hours ago
$228
Roundtrip
found 3 hours ago
Select Frontier Airlines flight, departing Thu, May 8 from Tucson to St. Louis, returning Sat, May 10, priced at $228 found 3 hours ago
Frontier Airlines
Thu, May 8 - Wed, May 21
TUS
Tucson
STL
St. Louis
$238 Roundtrip, found 3 hours ago
$238
Roundtrip
found 3 hours ago
Select Frontier Airlines flight, departing Thu, May 8 from Tucson to St. Louis, returning Wed, May 21, priced at $238 found 3 hours ago
Frontier Airlines
Sun, May 25 - Wed, May 28
TUS
Tucson
STL
St. Louis
$250 Roundtrip, found 5 days ago
$250
Roundtrip
found 5 days ago
Select Frontier Airlines flight, departing Sun, May 25 from Tucson to St. Louis, returning Wed, May 28, priced at $250 found 5 days ago
Frontier Airlines
Thu, May 8 - Sat, May 17
TUS
Tucson
STL
St. Louis
$258 Roundtrip, found 3 hours ago
$258
Roundtrip
found 3 hours ago
Select Frontier Airlines flight, departing Thu, May 8 from Tucson to St. Louis, returning Sat, May 17, priced at $258 found 3 hours ago
Frontier Airlines
Thu, May 22 - Sat, May 31
TUS
Tucson
STL
St. Louis
$260 Roundtrip, found 1 day ago
$260
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Thu, May 22 from Tucson to St. Louis, returning Sat, May 31, priced at $260 found 1 day ago
Southwest Airlines
Wed, Jul 9 - Tue, Jul 15
TUS
Tucson
STL
St. Louis
$267 Roundtrip, found 3 hours ago
$267
Roundtrip
found 3 hours ago
Select Southwest Airlines flight, departing Wed, Jul 9 from Tucson to St. Louis, returning Tue, Jul 15, priced at $267 found 3 hours ago
Delta
Wed, Sep 17 - Tue, Sep 23
TUS
Tucson
STL
St. Louis
$267 Roundtrip, found 2 hours ago
$267
Roundtrip
found 2 hours ago
Select Delta flight, departing Wed, Sep 17 from Tucson to St. Louis, returning Tue, Sep 23, priced at $267 found 2 hours ago
Flights from Tucson (TUS) to St. Louis (STL)
Origin airport
Tucson Intl.
Destination airport
Lambert-St. Louis Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Southwest Airlines, United
Roundtrip price
$188
Distance
1241 mi

Tucson to St. Louis Flights

The cheapest times to fly from Tucson to St. Louis

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Tucson to St. Louis are during the month of May. You can find some of the cheapest flights from Tucson to St. Louis with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Tucson to St. Louis

Sunday is one of the best days to book for cheap flights from Tucson to St. Louis: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Tucson to St. Louis

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Tucson to St. Louis in 2025. You can also book with separate airlines for your outbound and return journeys, from $134 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Tucson to St. Louis flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Tucson to St. Louis airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Tucson Intl. Airport (TUS) to Lambert-St. Louis Intl. Airport (STL) cost?
Discover the latest flight deals from TUS to STL by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from TUS to STL?
The cheapest flights from TUS to STL are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from TUS to STL?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that’ll take you from TUS to STL. Sort your results by “Price (lowest to highest)” to snap up a great deal.
How many flights per day from Tucson Intl. Airport (TUS) to Lambert-St. Louis Intl. Airport (STL)?
There aren’t any daily direct flights from Tucson Intl. Airport (TUS) to Lambert-St. Louis Intl. Airport (STL). But you can choose flights with layovers. Filter your search on Expedia to include one or more stops, and you’ll be soaring above the clouds in no time.
What day of the week has the most flights from TUS to STL?
Friday is generally the busiest day for flights, while Tuesday is often the quietest.* Keep in mind that flight schedules can change depending on a number of factors, such as the carrier and season.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Tucson Intl. Airport (TUS) to Lambert-St. Louis Intl. Airport (STL)?
To arrive at Lambert-St. Louis Intl. Airport (STL) without delays, select a flight that takes off from Tucson Intl. Airport (TUS) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this time.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.
Is it cheaper to buy a plane ticket from Tucson Intl. Airport (TUS) to Lambert-St. Louis Intl. Airport (STL) last-minute?
Holding off until right before your break to book a flight from TUS to STL often results in higher prices. While it’s possible to find some last-minute offers, they’re not always guaranteed. Keep your travel schedule open for a better chance of scoring a bargain.
Is it cheaper to book a TUS to STL flight and hotel package?
You can save money by booking a TUS to STL flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it’s easy to manage everything in one place. Once you’ve selected your preferred accommodations and flights, consider adding extras including car rentals, activities and tours.
Can I cancel or change the date of my flight from Tucson Intl. Airport (TUS) to Lambert-St. Louis Intl. Airport (STL)?
If you reserved your TUS to STL flight in the last 24 hours, you may be able to cancel or modify it at no cost. Depending on the airline and the type of fare you have, additional charges may apply for changes after that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, go to our Customer Service portal for more details.

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*Available to One Key members.