$77 Cheap Flights from Tucson (TUS) to St. Louis (STL)

View $77 flight on Thu, Nov 6, 2025Opens in a new window

Popular airlines from Tucson International Airport (TUS) to St. Louis Lambert Intl. Airport (STL)

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

Prices were available within the past 7 days and start at $77 for one-way flights and $154 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Thu, Nov 13 - Sun, Nov 16
TUS
Tucson
STL
St. Louis
$154 Roundtrip, just found
$154
Roundtrip
just found
Select Frontier Airlines flight, departing Thu, Nov 13 from Tucson to St. Louis, returning Sun, Nov 16, priced at $154 just found
Frontier Airlines
Thu, Nov 13 - Sat, Nov 15
TUS
Tucson
STL
St. Louis
$162 Roundtrip, just found
$162
Roundtrip
just found
Select Frontier Airlines flight, departing Thu, Nov 13 from Tucson to St. Louis, returning Sat, Nov 15, priced at $162 just found
Frontier Airlines
Thu, Oct 23 - Sun, Nov 9
TUS
Tucson
STL
St. Louis
$180 Roundtrip, found 8 hours ago
$180
Roundtrip
found 8 hours ago
Select Frontier Airlines flight, departing Thu, Oct 23 from Tucson to St. Louis, returning Sun, Nov 9, priced at $180 found 8 hours ago
Frontier Airlines
Sun, Nov 2 - Sat, Nov 15
TUS
Tucson
STL
St. Louis
$188 Roundtrip, found 8 hours ago
$188
Roundtrip
found 8 hours ago
Select Frontier Airlines flight, departing Sun, Nov 2 from Tucson to St. Louis, returning Sat, Nov 15, priced at $188 found 8 hours ago
Frontier Airlines
Fri, Oct 10 - Wed, Oct 15
TUS
Tucson
STL
St. Louis
$192 Roundtrip, found 5 hours ago
$192
Roundtrip
found 5 hours ago
Select Frontier Airlines flight, departing Fri, Oct 10 from Tucson to St. Louis, returning Wed, Oct 15, priced at $192 found 5 hours ago
Frontier Airlines
Mon, Oct 20 - Thu, Nov 6
TUS
Tucson
STL
St. Louis
$200 Roundtrip, found 8 hours ago
$200
Roundtrip
found 8 hours ago
Select Frontier Airlines flight, departing Mon, Oct 20 from Tucson to St. Louis, returning Thu, Nov 6, priced at $200 found 8 hours ago
Southwest Airlines
Fri, Oct 31 - Sun, Nov 2
TUS
Tucson
STL
St. Louis
$221 Roundtrip, found 22 hours ago
$221
Roundtrip
found 22 hours ago
Select Southwest Airlines flight, departing Fri, Oct 31 from Tucson to St. Louis, returning Sun, Nov 2, priced at $221 found 22 hours ago
United
Fri, Oct 31 - Sun, Nov 2
TUS
Tucson
STL
St. Louis
$250 Roundtrip, found 22 hours ago
$250
Roundtrip
found 22 hours ago
Select United flight, departing Fri, Oct 31 from Tucson to St. Louis, returning Sun, Nov 2, priced at $250 found 22 hours ago
Delta
Fri, Oct 31 - Sun, Nov 2
TUS
Tucson
STL
St. Louis
$266 Roundtrip, found 22 hours ago
$266
Roundtrip
found 22 hours ago
Select Delta flight, departing Fri, Oct 31 from Tucson to St. Louis, returning Sun, Nov 2, priced at $266 found 22 hours ago
American Airlines
Wed, Nov 19 - Mon, Nov 24
TUS
Tucson
STL
St. Louis
$287 Roundtrip, found 3 hours ago
$287
Roundtrip
found 3 hours ago
Select American Airlines flight, departing Wed, Nov 19 from Tucson to St. Louis, returning Mon, Nov 24, priced at $287 found 3 hours ago

Find the cheapest month to fly from Tucson (TUS) to St. Louis (STL)

August is typically the cheapest month to fly

From $174 - $750 per traveler.

Frequently asked questions

How much does a flight from Tucson Intl. Airport (TUS) to Lambert-St. Louis Intl. Airport (STL) cost?
Snag a cheap one-way flight from $77 or cheap return flight from $154 from Tucson Intl. Airport (TUS) to Lambert-St. Louis Intl. Airport (STL) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Tucson Intl. Airport (TUS) to Lambert-St. Louis Intl. Airport (STL)?
November is the most affordable month to fly from TUS to STL. Avoiding peak travel times is often the key to better flight prices.
What is the cheapest airline that flies from Tucson Intl. Airport (TUS) to Lambert-St. Louis Intl. Airport (STL)?
Expedia's filter tool lets you easily compare different airlines, departure times and fares all in one place. Customize the search to your preferences, then sort by "Price (lowest to highest)" to find out which carrier offers the cheapest TUS to STL flight.
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.

Travel information

Travel information

Origin airport
Tucson Intl.
Destination airport
Lambert-St. Louis Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Hawaiian Airlines, Southwest Airlines, United
Roundtrip price
$154
Distance
1241 mi

Book with confidence

Book with confidence

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 November. 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 $77 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.

 

Tucson to St. Louis Flights

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*Available to One Key members.