What is the cheapest airline that flies from Tucson to Lambert-St Louis?

Frontier, American Airlines, and Delta are the most popular carriers operating from Tucson 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 Tucson according to our data. American Airlines is the first choice among our users, with 61% of people opting to fly with this airline when traveling to St. Louis. Keep in mind that there are 4 different airlines that fly to St. Louis on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Tucson Airport to Lambert-St Louis Airport?

Prices for flights from Tucson Airport to Lambert-St Louis Airport were last updated today.

How many operators does momondo search for flights from Tucson Airport to Lambert-St Louis Airport?

As of October 2025, there are 4 operators available to choose from for flights from Tucson Airport to Lambert-St Louis Airport.

How old do you have to be to fly from Tucson 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 Tucson Airport to Lambert-St Louis Airport.

What documentation or ID do you need to fly to Lambert-St Louis Airport?

The necessary travel and health documents for your Lambert-St Louis Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$122 Cheap Flights from Tucson to St. Louis in 2025/26

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Find the cheapest flights from Tucson to St. Louis

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

2:42 pm - 8:26 pmTUS-STL

4h 44m1 stop

8:41 am - 4:02 pmSTL-TUS

8h 21m1 stop

$279United Airlines

Find Deal

Thu, Feb 19 - Tue, Feb 24

2:42 pm - 8:26 pmTUS-STL

4h 44m1 stop

6:30 am - 4:02 pmSTL-TUS

10h 32m2 stops

$284United Airlines

Find Deal

Thu, Feb 19 - Tue, Feb 24

6:40 am - 2:48 pmTUS-STL

7h 08m1 stop

5:00 pm - 10:27 pmSTL-TUS

6h 27m1 stop

$287Delta

Find Deal

Wed, Jan 28 - Wed, Feb 4

8:00 am - 4:17 pmTUS-STL

7h 17m2 stops

9:25 am - 4:10 pmSTL-TUS

7h 45m1 stop

$292American Airlines

Find Deal

Wed, Jan 28 - Wed, Feb 4

12:01 pm - 6:47 pmTUS-STL

5h 46m1 stop

1:35 pm - 6:05 pmSTL-TUS

5h 30m1 stop

$317United Airlines

Find Deal

Wed, Nov 26 - Wed, Dec 3

8:00 am - 4:17 pmTUS-STL

7h 17m2 stops

11:55 am - 7:21 pmSTL-TUS

8h 26m1 stop

$320American Airlines

Find Deal

Wed, Jan 28 - Wed, Feb 4

4:00 pm - 10:45 pmTUS-STL

5h 45m1 stop

5:55 am - 2:40 pmSTL-TUS

9h 45m1 stop

$322Southwest

Find Deal

Fri, Nov 21 - Thu, Nov 27

6:49 am - 1:25 pmTUS-STL

5h 36m1 stop

7:30 am - 3:14 pmSTL-TUS

8h 44m1 stop

$325Delta

Find Deal

Wed, Feb 25 - Sun, Mar 1

5:00 pm - 11:35 pmTUS-STL

5h 35m1 stop

10:35 am - 5:40 pmSTL-TUS

8h 05m2 stops

$337Southwest

Find Deal

Wed, Nov 26 - Wed, Dec 3

2:20 pm - 9:07 amTUS-STL

17h 47m2 stops

12:01 pm - 3:42 pmSTL-TUS

28h 41m1 stop

$355Frontier

Find Deal

Mon, Nov 17 - Fri, Nov 21

United Airlines flights from Tucson to St. Louis

Our best United Airlines deals on Tucson to St. Louis flight tickets

United Airlines

Feb 19

TUS2:42 pmTucson

4h 44m

1 stop

STL8:26 pmLambert-St Louis

Feb 24

STL8:41 amLambert-St Louis

8h 21m

1 stop

TUS4:02 pmTucson

$279

Find similar

United Airlines

Feb 19

TUS2:42 pmTucson

4h 44m

1 stop

STL8:26 pmLambert-St Louis

Feb 24

STL6:30 amLambert-St Louis

10h 32m

2 stops

TUS4:02 pmTucson

$284

Find similar

United Airlines

Nov 26

TUS12:01 pmTucson

5h 46m

1 stop

STL6:47 pmLambert-St Louis

Dec 3

STL1:35 pmLambert-St Louis

5h 30m

1 stop

TUS6:05 pmTucson

$317

Find similar

Frontier flights from Tucson to St. Louis

Our best Frontier deals on Tucson to St. Louis flight tickets

Frontier

Nov 6

TUS12:32 pmTucson

19h 35m

1 stop

STL9:07 amLambert-St Louis

Nov 9

STL2:42 pmLambert-St Louis

23h 53m

1 stop

TUS1:35 pmTucson

$274

Find similar

Frontier

Nov 17

TUS2:20 pmTucson

17h 47m

2 stops

STL9:07 amLambert-St Louis

Nov 21

STL12:01 pmLambert-St Louis

28h 41m

1 stop

TUS3:42 pmTucson

$355

Find similar

Fly from

Fly to

Route

Depart

Return

Price

TucsonSt. Louis

TUS - STL

TUSSTL

Tucson

Thu 2/19

2:42 pm-8:26 pm

1 stop4h 44m

Lambert-St Louis

Tue 2/24

8:41 am-4:02 pm

1 stop8h 21m

$279

TucsonSt. Louis

TUS - STL

TUSSTL

Tucson

Thu 2/19

2:42 pm-8:26 pm

1 stop4h 44m

Lambert-St Louis

Tue 2/24

6:30 am-4:02 pm

2 stops10h 32m

$284

TucsonSt. Louis

TUS - STL

TUSSTL

Tucson

Wed 1/28

6:40 am-2:48 pm

1 stop7h 08m

Lambert-St Louis

Wed 2/4

5:00 pm-10:27 pm

1 stop6h 27m

$287

TucsonSt. Louis

TUS - STL

TUSSTL

Tucson

Wed 1/28

8:00 am-4:17 pm

2 stops7h 17m

Lambert-St Louis

Wed 2/4

9:25 am-4:10 pm

1 stop7h 45m

$292

TucsonSt. Louis

TUS - STL

TUSSTL

Tucson

Wed 11/26

12:01 pm-6:47 pm

1 stop5h 46m

Lambert-St Louis

Wed 12/3

1:35 pm-6:05 pm

1 stop5h 30m

$317

TucsonSt. Louis

TUS - STL

TUSSTL

Tucson

Wed 1/28

8:00 am-4:17 pm

2 stops7h 17m

Lambert-St Louis

Wed 2/4

11:55 am-7:21 pm

1 stop8h 26m

$320

TucsonSt. Louis

TUS - STL

TUSSTL

Tucson

Fri 11/21

4:00 pm-10:45 pm

1 stop5h 45m

Lambert-St Louis

Thu 11/27

5:55 am-2:40 pm

1 stop9h 45m

$322

TucsonSt. Louis

TUS - STL

TUSSTL

Tucson

Wed 2/25

6:49 am-1:25 pm

1 stop5h 36m

Lambert-St Louis

Sun 3/1

7:30 am-3:14 pm

1 stop8h 44m

$325

TucsonSt. Louis

TUS - STL

TUSSTL

Tucson

Wed 11/26

5:00 pm-11:35 pm

1 stop5h 35m

Lambert-St Louis

Wed 12/3

10:35 am-5:40 pm

2 stops8h 05m

$337

TucsonSt. Louis

TUS - STL

TUSSTL

Tucson

Mon 11/17

2:20 pm-9:07 am

2 stops17h 47m

Lambert-St Louis

Fri 11/21

12:01 pm-3:42 pm

1 stop28h 41m

$355

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Tucson 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

Prices

Airlines

What is the cheapest month to fly to St. Louis?

In general, April is the cheapest month to fly from Tucson to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $316. The month of January is another great option to travel to St. Louis, with average flight prices from Tucson averaging around $332.

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 $377. 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 $615. 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 Tucson at noon is the least expensive time of day to depart. momondo users have found prices as low as $388 when looking at flights departing at noon. In the afternoon is when there is more demand to fly to St. Louis, so prices are often more expensive at around $431 per ticket.

How far in advance should I book a flight to St. Louis?

You are more likely to see cheaper flights to St. Louis from Tucson when booking weeks ahead of your departure date. In general, you can expect to find flights to St. Louis for around $402 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to St. Louis from Tucson for as low as $339 on momondo.

How have Tucson to St. Louis flight prices changed over time?

As of October 2025, prices for Tucson to St. Louis flights are approximately 44% cheaper when compared to flights at the same time last year.

When to book flights from Tucson to St. Louis

Are you open to changing your travel dates? Check out the ideal times to fly from Tucson to St. Louis according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Tucson to St. Louis (TUS to STL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Tucson to St. Louis

Direct flights	None

There are no direct flights from Tucson to St. Louis. There are no popular flight routes from Tucson to St. Louis.

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How far is Tucson to Lambert-St Louis by plane?
The distance between Tucson and Lambert-St Louis is about 1245.9 mi. A reasonable flight in good conditions will take 4h 32m.
When did momondo last update prices for flights from Tucson Airport to Lambert-St Louis Airport?
Prices for flights from Tucson Airport to Lambert-St Louis Airport were last updated today.
How many operators does momondo search for flights from Tucson Airport to Lambert-St Louis Airport?
As of October 2025, there are 4 operators available to choose from for flights from Tucson Airport to Lambert-St Louis Airport.
How old do you have to be to fly from Tucson 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 Tucson Airport to Lambert-St Louis Airport.
What documentation or ID do you need to fly to Lambert-St Louis Airport?
The necessary travel and health documents for your Lambert-St Louis Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from Tucson to St. Louis?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Tucson to St. Louis is American Airlines (61% of total bookings). The next most popular airlines are Southwest (18%), United Airlines (16%), and Delta (5%).

Best airlines flying from Tucson to St. Louis

Compare and see reviews for airlines that fly from Tucson to St. Louis with momondo

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom $134	Free Cancellation	Rating 7.9 7,994 reviews	Search Delta flights
American Airlines	PriceFrom $247	Free Cancellation	Rating 7.2 11,032 reviews	Search American Airlines flights
Southwest	PriceFrom $266	Free Cancellation	Rating 8.0 4,240 reviews	Search Southwest flights
United Airlines	PriceFrom $266	Free Cancellation	Rating 7.4 9,001 reviews	Search United Airlines flights

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Florissant

O'Fallon

Wentzville

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Collinsville

St. Peters

Alton

Farmington

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Eureka

Litchfield

Shrewsbury

Why use momondo?

Why should I use momondo to find a flight deal from Tucson to St. Louis?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Tucson to St. Louis. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Tucson to St. Louis with flexible booking policies on momondo?

Flights from Tucson to St. Louis with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Tucson to St. Louis?

Once all potential Tucson to St. Louis flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Tucson to St. Louis right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Tucson to St. Louis flights. All you need is a valid email address and we will do the rest; it is that quick and easy.