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

Frontier, Delta, and Southwest 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 56% 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 December 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.

12:50 pm - 10:02 am

TUS

STL

20h 12m1 stop

10:10 pm - 6:58 pm

STL

TUS

21h 48m1 stop

$183Frontier

Tue, Dec 30 - Sat, Jan 3

9:59 pm - 12:12 pm

TUS

STL

13h 13m1 stop

10:09 pm - 4:42 pm

STL

TUS

19h 33m1 stop

$201Frontier

Sun, Jan 11 - Sun, Jan 18

4:02 pm - 11:50 pm

TUS

STL

6h 48m1 stop

9:32 am - 3:56 pm

STL

TUS

7h 24m1 stop

$243American Airlines

Sat, Feb 14 - Wed, Feb 18

9:59 pm - 10:02 am

TUS

STL

11h 03m2 stops

1:35 pm - 4:42 pm

STL

TUS

28h 07m1 stop

$244Frontier

Sun, Jan 11 - Sun, Jan 18

2:32 pm - 8:58 pm

TUS

STL

5h 26m1 stop

4:30 pm - 9:31 pm

STL

TUS

6h 01m1 stop

$265United Airlines

Sat, Feb 7 - Sat, Feb 14

2:50 pm - 10:59 pm

TUS

STL

7h 09m2 stops

11:46 am - 6:40 pm

STL

TUS

7h 54m1 stop

$281American Airlines

Sat, Feb 7 - Sat, Feb 14

1:42 pm - 8:37 pm

TUS

STL

5h 55m1 stop

2:38 pm - 10:37 pm

STL

TUS

8h 59m1 stop

$287Delta

Wed, Jan 28 - Wed, Feb 4

7:20 am - 4:35 pm

TUS

STL

8h 15m2 stops

6:05 am - 11:15 am

STL

TUS

6h 10m1 stop

$292Southwest

Tue, Feb 3 - Wed, Feb 11

3:45 pm - 10:05 pm

TUS

STL

5h 20m1 stop

8:45 am - 2:55 pm

STL

TUS

7h 10m2 stops

$302Southwest

Wed, Feb 18 - Sat, Feb 21

12:12 pm - 6:44 pm

TUS

STL

5h 32m1 stop

2:50 pm - 11:59 pm

STL

TUS

10h 09m1 stop

$316Multiple Airlines

Fri, Jan 30 - Fri, Feb 6

United Airlines flights from Tucson to St. Louis

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

United Airlines

Feb 7

TUS2:32 pmTucson

5h 26m

1 stop

STL8:58 pmLambert-St Louis

Feb 14

STL4:30 pmLambert-St Louis

6h 01m

1 stop

TUS9:31 pmTucson

$265

Find similar

United Airlines

Feb 14

TUS6:30 amTucson

8h 32m

2 stops

STL4:02 pmLambert-St Louis

Feb 18

STL9:55 amLambert-St Louis

12h 54m

2 stops

TUS9:49 pmTucson

$333

Find similar

United Airlines

Jan 7

TUS6:30 amTucson

5h 46m

1 stop

STL1:16 pmLambert-St Louis

Jan 9

STL11:20 amLambert-St Louis

11h 06m

2 stops

TUS9:26 pmTucson

$339

Find similar

Alaska Airlines flights from Tucson to St. Louis

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

Alaska Airlines

Jan 29

TUS7:30 amTucson

29h 24m

2 stops

STL1:54 pmLambert-St Louis

Feb 1

STL2:50 pmLambert-St Louis

10h 09m

1 stop

TUS11:59 pmTucson

$368

Find similar

Alaska Airlines

Jan 29

TUS7:30 amTucson

29h 24m

2 stops

STL1:54 pmLambert-St Louis

Feb 1

STL2:50 pmLambert-St Louis

10h 09m

1 stop

TUS11:59 pmTucson

$378

Find similar

Alaska Airlines

Jan 29

TUS4:29 pmTucson

20h 25m

1 stop

STL1:54 pmLambert-St Louis

Feb 1

STL2:50 pmLambert-St Louis

10h 09m

1 stop

TUS11:59 pmTucson

$380

Find similar

Fly from

Fly to

Route

Depart

Return

Price

TucsonSt. Louis

TUS - STL

TUSSTL

Tucson

Tue 12/30

12:50 pm-10:02 am

1 stop20h 12m

Lambert-St Louis

Sat 1/3

10:10 pm-6:58 pm

1 stop21h 48m

$183

TucsonSt. Louis

TUS - STL

TUSSTL

Tucson

Sun 1/11

9:59 pm-12:12 pm

1 stop13h 13m

Lambert-St Louis

Sun 1/18

10:09 pm-4:42 pm

1 stop19h 33m

$201

TucsonSt. Louis

TUS - STL

TUSSTL

Tucson

Sat 2/14

4:02 pm-11:50 pm

1 stop6h 48m

Lambert-St Louis

Wed 2/18

9:32 am-3:56 pm

1 stop7h 24m

$243

TucsonSt. Louis

TUS - STL

TUSSTL

Tucson

Sun 1/11

9:59 pm-10:02 am

2 stops11h 03m

Lambert-St Louis

Sun 1/18

1:35 pm-4:42 pm

1 stop28h 07m

$244

TucsonSt. Louis

TUS - STL

TUSSTL

Tucson

Sat 2/7

2:32 pm-8:58 pm

1 stop5h 26m

Lambert-St Louis

Sat 2/14

4:30 pm-9:31 pm

1 stop6h 01m

$265

TucsonSt. Louis

TUS - STL

TUSSTL

Tucson

Sat 2/7

2:50 pm-10:59 pm

2 stops7h 09m

Lambert-St Louis

Sat 2/14

11:46 am-6:40 pm

1 stop7h 54m

$281

TucsonSt. Louis

TUS - STL

TUSSTL

Tucson

Wed 1/28

1:42 pm-8:37 pm

1 stop5h 55m

Lambert-St Louis

Wed 2/4

2:38 pm-10:37 pm

1 stop8h 59m

$287

TucsonSt. Louis

TUS - STL

TUSSTL

Tucson

Tue 2/3

7:20 am-4:35 pm

2 stops8h 15m

Lambert-St Louis

Wed 2/11

6:05 am-11:15 am

1 stop6h 10m

$292

TucsonSt. Louis

TUS - STL

TUSSTL

Tucson

Wed 2/18

3:45 pm-10:05 pm

1 stop5h 20m

Lambert-St Louis

Sat 2/21

8:45 am-2:55 pm

2 stops7h 10m

$302

TucsonSt. Louis

TUS - STL

TUSSTL

Tucson

Fri 1/30

12:12 pm-6:44 pm

1 stop5h 32m

Lambert-St Louis

Fri 2/6

2:50 pm-11:59 pm

1 stop10h 09m

$316

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 19 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 October is another great option to travel to St. Louis, with average flight prices from Tucson averaging around $321.

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 $394 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 December 2025, prices for Tucson to St. Louis flights are approximately 4% 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	5h 14m
Direct flights	None

The fastest flight from Tucson to St. Louis takes 5h 14m

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 5h 14m.
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 December 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 (56% of total bookings). The next most popular airlines are Southwest (22%), 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 8,008 reviews	Search Delta flights
American Airlines	PriceFrom $239	Free Cancellation	Rating 7.2 11,049 reviews	Search American Airlines flights
Southwest	PriceFrom $266	Free Cancellation	Rating 7.9 4,250 reviews	Search Southwest flights
United Airlines	PriceFrom $266	Free Cancellation	Rating 7.4 9,092 reviews	Search United Airlines flights

St. Charles

Chesterfield

Hermann

Fairview Heights

Maryland Heights

O'Fallon

Florissant

Fenton

Wentzville

St. Peters

Collinsville

Alton

Clayton

Festus

Glencoe

Farmington

Eureka

Edwardsville

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.