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

Frontier and United Airlines 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 54% 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 January 2026, 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.

$101 Cheap Flights from Tucson to St. Louis in 2026

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

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.

1:20 pm - 9:26 pm

TUS

STL

7h 06m

1 stop

2:47 pm - 11:59 pm

STL

TUS

10h 12m

1 stop

$278Multiple Airlines

Thu, Feb 26 - Mon, Mar 2

1:34 pm - 11:36 pm

TUS

STL

9h 02m

1 stop

2:22 pm - 10:30 pm

STL

TUS

9h 08m

1 stop

$287Delta

Wed, Feb 25 - Sat, Feb 28

2:42 pm - 8:26 pm

TUS

STL

4h 44m

1 stop

4:30 pm - 8:49 pm

STL

TUS

6h 19m

1 stop

$297United Airlines

Tue, Mar 3 - Tue, Mar 10

7:09 am - 3:38 pm

TUS

STL

7h 29m

1 stop

7:40 am - 3:47 pm

STL

TUS

10h 07m

2 stops

$302United Airlines

Tue, Mar 3 - Tue, Mar 10

1:20 pm - 9:26 pm

TUS

STL

7h 06m

1 stop

2:47 pm - 5:20 pm

STL

TUS

27h 33m

2 stops

$304Multiple Airlines

Thu, Feb 26 - Mon, Mar 2

1:05 pm - 10:14 pm

TUS

STL

8h 09m

1 stop

6:00 am - 11:48 am

STL

TUS

6h 48m

1 stop

$331United Airlines

Wed, Feb 25 - Sun, Mar 1

5:59 pm - 12:25 am

TUS

STL

5h 26m

1 stop

4:21 pm - 9:41 pm

STL

TUS

7h 20m

1 stop

$333Delta

Mon, Mar 2 - Mon, Mar 9

5:04 pm - 12:21 am

TUS

STL

5h 17m

1 stop

6:00 am - 11:30 am

STL

TUS

7h 30m

1 stop

$341Delta

Wed, Mar 25 - Fri, Mar 27

3:45 pm - 10:05 pm

TUS

STL

5h 20m

1 stop

5:30 am - 5:45 pm

STL

TUS

13h 15m

2 stops

$342Southwest

Wed, Feb 18 - Fri, Feb 20

7:00 am - 6:02 pm

TUS

STL

9h 02m

1 stop

5:00 pm - 10:12 pm

STL

TUS

7h 12m

1 stop

$345Delta

Tue, May 12 - Sat, May 16

United Airlines flights from Tucson to St. Louis

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

United Airlines

Feb 18

TUS1:05 pmTucson

8h 09m

1 stop

STL10:14 pmLambert-St Louis

Feb 20

STL2:45 pmLambert-St Louis

7h 55m

1 stop

TUS9:40 pmTucson

$331

United Airlines

Feb 11

TUS2:32 pmTucson

5h 26m

1 stop

STL8:58 pmLambert-St Louis

Feb 12

STL6:00 amLambert-St Louis

6h 48m

1 stop

TUS11:48 amTucson

$343

United Airlines

Feb 14

TUS1:05 pmTucson

8h 09m

1 stop

STL10:14 pmLambert-St Louis

Feb 18

STL4:28 pmLambert-St Louis

6h 21m

1 stop

TUS9:49 pmTucson

$367

Southwest flights from Tucson to St. Louis

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

Southwest

Feb 18

TUS3:45 pmTucson

5h 20m

1 stop

STL10:05 pmLambert-St Louis

Feb 20

STL5:30 amLambert-St Louis

13h 15m

2 stops

TUS5:45 pmTucson

$342

Southwest

Mar 2

TUS3:25 pmTucson

7h 20m

2 stops

STL11:45 pmLambert-St Louis

Mar 9

STL7:30 pmLambert-St Louis

6h 05m

1 stop

TUS11:35 pmTucson

$346

Southwest

May 12

TUS12:45 pmTucson

5h 25m

1 stop

STL8:10 pmLambert-St Louis

May 16

STL10:35 amLambert-St Louis

9h 05m

2 stops

TUS5:40 pmTucson

$350

Fly from

Fly to

Route

Depart

Return

Price

TucsonSt. Louis

TUS - STL

TUSSTL

Tucson

Thu 2/26

1:20 pm-9:26 pm

1 stop7h 06m

Lambert-St Louis

Mon 3/2

2:47 pm-11:59 pm

1 stop10h 12m

$278

TucsonSt. Louis

TUS - STL

TUSSTL

Tucson

Wed 2/25

1:34 pm-11:36 pm

1 stop9h 02m

Lambert-St Louis

Sat 2/28

2:22 pm-10:30 pm

1 stop9h 08m

$287

TucsonSt. Louis

TUS - STL

TUSSTL

Tucson

Tue 3/3

2:42 pm-8:26 pm

1 stop4h 44m

Lambert-St Louis

Tue 3/10

4:30 pm-8:49 pm

1 stop6h 19m

$297

TucsonSt. Louis

TUS - STL

TUSSTL

Tucson

Tue 3/3

7:09 am-3:38 pm

1 stop7h 29m

Lambert-St Louis

Tue 3/10

7:40 am-3:47 pm

2 stops10h 07m

$302

TucsonSt. Louis

TUS - STL

TUSSTL

Tucson

Thu 2/26

1:20 pm-9:26 pm

1 stop7h 06m

Lambert-St Louis

Mon 3/2

2:47 pm-5:20 pm

2 stops27h 33m

$304

TucsonSt. Louis

TUS - STL

TUSSTL

Tucson

Wed 2/25

1:05 pm-10:14 pm

1 stop8h 09m

Lambert-St Louis

Sun 3/1

6:00 am-11:48 am

1 stop6h 48m

$331

TucsonSt. Louis

TUS - STL

TUSSTL

Tucson

Mon 3/2

5:59 pm-12:25 am

1 stop5h 26m

Lambert-St Louis

Mon 3/9

4:21 pm-9:41 pm

1 stop7h 20m

$333

TucsonSt. Louis

TUS - STL

TUSSTL

Tucson

Wed 3/25

5:04 pm-12:21 am

1 stop5h 17m

Lambert-St Louis

Fri 3/27

6:00 am-11:30 am

1 stop7h 30m

$341

TucsonSt. Louis

TUS - STL

TUSSTL

Tucson

Wed 2/18

3:45 pm-10:05 pm

1 stop5h 20m

Lambert-St Louis

Fri 2/20

5:30 am-5:45 pm

2 stops13h 15m

$342

TucsonSt. Louis

TUS - STL

TUSSTL

Tucson

Tue 5/12

7:00 am-6:02 pm

1 stop9h 02m

Lambert-St Louis

Sat 5/16

5:00 pm-10:12 pm

1 stop7h 12m

$345

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, February 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 $301. The month of April is another great option to travel to St. Louis, with average flight prices from Tucson averaging around $316.

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 $385 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 $315 on momondo.

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

As of January 2026, prices for Tucson to St. Louis flights are approximately 23% more expensive 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

Fastest flight time	4h 44m
Direct flights	None

The fastest flight from Tucson to St. Louis takes 4h 44m

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

Search flight deals

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 44m.
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 January 2026, 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 (54% of total bookings). The next most popular airlines are Southwest (23%), United Airlines (16%), and Delta (6%).

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 8,089 reviews	Search Delta flights
American Airlines	PriceFrom $214	Free Cancellation	Rating 7.2 11,174 reviews	Search American Airlines flights
Southwest	PriceFrom $264	Free Cancellation	Rating 8.0 4,266 reviews	Search Southwest flights
United Airlines	PriceFrom $266	Free Cancellation	Rating 7.4 9,191 reviews	Search United Airlines flights

St. Charles

Chesterfield

Hermann

Fairview Heights

Maryland Heights

Florissant

O'Fallon

Fenton

Collinsville

St. Peters

Wentzville

Alton

Farmington

Clayton

Eureka

Edwardsville

Festus

Glencoe

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.