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Cheap flights from St. Louis to Tucson from $172

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Tucson departing on 4/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Find the cheapest flights from St. Louis to Tucson

Cheap round-trip flights

Enter your travel dates to find the best prices.
American Airlines Logo
7:05 am - 11:46 am
STL
-
TUS
6h 41m
1 stop
American Airlines Logo
5:49 am - 1:51 pm
TUS
-
STL
6h 02m
1 stop
$343American Airlines
Wed, Apr 8 - Wed, Apr 15
American Airlines Logo
5:21 pm - 11:59 pm
STL
-
TUS
8h 38m
1 stop
American Airlines Logo
2:15 pm - 10:59 pm
TUS
-
STL
6h 44m
2 stops
$348American Airlines
Tue, Apr 7 - Tue, Apr 14
American Airlines Logo
8:00 am - 1:44 pm
STL
-
TUS
7h 44m
1 stop
American Airlines Logo
2:15 pm - 10:59 pm
TUS
-
STL
6h 44m
2 stops
$354American Airlines
Tue, Apr 7 - Tue, Apr 14
Delta Logo
6:29 am - 1:00 pm
STL
-
TUS
8h 31m
1 stop
Delta Logo
4:56 pm - 12:25 am
TUS
-
STL
5h 29m
1 stop
$355Delta
Tue, Apr 7 - Thu, Apr 16
American Airlines Logo
5:20 am - 8:59 am
STL
-
TUS
5h 39m
1 stop
American Airlines Logo
3:55 pm - 11:59 pm
TUS
-
STL
6h 04m
1 stop
$356American Airlines
Sat, May 16 - Wed, May 27
United Airlines Logo
11:15 am - 8:18 pm
STL
-
TUS
11h 03m
2 stops
United Airlines Logo
7:10 pm - 5:50 am
TUS
-
STL
8h 40m
1 stop
$360United Airlines
Tue, Apr 7 - Thu, Apr 16
American Airlines Logo
5:20 am - 8:59 am
STL
-
TUS
5h 39m
1 stop
American Airlines Logo
3:47 pm - 10:59 pm
TUS
-
STL
5h 12m
1 stop
$367American Airlines
Thu, Apr 23 - Mon, Apr 27
Southwest Logo
5:30 am - 1:40 pm
STL
-
TUS
10h 10m
2 stops
Southwest Logo
7:30 am - 12:15 am
TUS
-
STL
14h 45m
2 stops
$371Southwest
Tue, Apr 7 - Thu, Apr 16
Southwest Logo
5:15 pm - 10:50 pm
STL
-
TUS
7h 35m
2 stops
Southwest Logo
3:20 pm - 11:50 pm
TUS
-
STL
6h 30m
1 stop
$372Southwest
Mon, Apr 20 - Thu, Apr 23
American Airlines Logo
9:34 am - 2:35 pm
STL
-
TUS
7h 01m
2 stops
American Airlines Logo
2:15 pm - 10:59 pm
TUS
-
STL
6h 44m
2 stops
$376American Airlines
Sat, Apr 18 - Tue, Apr 21

American Airlines flights from St. Louis to Tucson

Our best American Airlines deals on St. Louis to Tucson flight tickets
American Airlines
Apr 8
STL7:05 amLambert-St Louis
6h 41m
1 stop
TUS11:46 amTucson
Apr 15
TUS5:49 amTucson
6h 02m
1 stop
STL1:51 pmLambert-St Louis
$343
American Airlines
Apr 18
STL5:20 amLambert-St Louis
5h 39m
1 stop
TUS8:59 amTucson
Apr 21
TUS2:15 pmTucson
6h 44m
2 stops
STL10:59 pmLambert-St Louis
$348
American Airlines
Apr 7
STL8:00 amLambert-St Louis
7h 44m
1 stop
TUS1:44 pmTucson
Apr 14
TUS2:15 pmTucson
6h 44m
2 stops
STL10:59 pmLambert-St Louis
$354

United Airlines flights from St. Louis to Tucson

Our best United Airlines deals on St. Louis to Tucson flight tickets
United Airlines
Apr 7
STL11:15 amLambert-St Louis
11h 03m
2 stops
TUS8:18 pmTucson
Apr 16
TUS7:10 pmTucson
8h 40m
1 stop
STL5:50 amLambert-St Louis
$360
United Airlines
Apr 10
STL2:40 pmLambert-St Louis
7h 38m
1 stop
TUS8:18 pmTucson
Apr 15
TUS6:30 amTucson
7h 38m
1 stop
STL4:08 pmLambert-St Louis
$405
United Airlines
Apr 8
STL9:10 amLambert-St Louis
14h 12m
2 stops
TUS9:22 pmTucson
Apr 15
TUS7:15 amTucson
7h 41m
1 stop
STL4:56 pmLambert-St Louis
$428

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Tucson that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated March 20, 2026.
Use the filters below to find and compare flights from St. Louis to Tucson that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisTucson

STL - TUS

STLTUS

Lambert-St Louis

Wed 4/8

7:05 am-11:46 am

1 stop6h 41m

Tucson

Wed 4/15

5:49 am-1:51 pm

1 stop6h 02m

$343

St. LouisTucson

STL - TUS

STLTUS

Lambert-St Louis

Tue 4/7

5:21 pm-11:59 pm

1 stop8h 38m

Tucson

Tue 4/14

2:15 pm-10:59 pm

2 stops6h 44m

$348

St. LouisTucson

STL - TUS

STLTUS

Lambert-St Louis

Tue 4/7

8:00 am-1:44 pm

1 stop7h 44m

Tucson

Tue 4/14

2:15 pm-10:59 pm

2 stops6h 44m

$354

St. LouisTucson

STL - TUS

STLTUS

Lambert-St Louis

Tue 4/7

6:29 am-1:00 pm

1 stop8h 31m

Tucson

Thu 4/16

4:56 pm-12:25 am

1 stop5h 29m

$355

St. LouisTucson

STL - TUS

STLTUS

Lambert-St Louis

Sat 5/16

5:20 am-8:59 am

1 stop5h 39m

Tucson

Wed 5/27

3:55 pm-11:59 pm

1 stop6h 04m

$356

St. LouisTucson

STL - TUS

STLTUS

Lambert-St Louis

Tue 4/7

11:15 am-8:18 pm

2 stops11h 03m

Tucson

Thu 4/16

7:10 pm-5:50 am

1 stop8h 40m

$360
Quickest round-trip

St. LouisTucson

STL - TUS

STLTUS

Lambert-St Louis

Thu 4/23

5:20 am-8:59 am

1 stop5h 39m

Tucson

Mon 4/27

3:47 pm-10:59 pm

1 stop5h 12m

$367

St. LouisTucson

STL - TUS

STLTUS

Lambert-St Louis

Tue 4/7

5:30 am-1:40 pm

2 stops10h 10m

Tucson

Thu 4/16

7:30 am-12:15 am

2 stops14h 45m

$371

St. LouisTucson

STL - TUS

STLTUS

Lambert-St Louis

Mon 4/20

5:15 pm-10:50 pm

2 stops7h 35m

Tucson

Thu 4/23

3:20 pm-11:50 pm

1 stop6h 30m

$372

St. LouisTucson

STL - TUS

STLTUS

Lambert-St Louis

Sat 4/18

9:34 am-2:35 pm

2 stops7h 01m

Tucson

Tue 4/21

2:15 pm-10:59 pm

2 stops6h 44m

$376

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Tucson from

How to get the cheapest flight ticket from St. Louis to Tucson

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

What is the cheapest month to fly to Tucson?

In general, October is the cheapest month to fly from St. Louis to Tucson. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $289. If you don’t want to visit Tucson in October, then you should wait until August to fly from St. Louis, when ticket prices are also cheap, with an average price of $317.

How far in advance should I book a flight to Tucson?

You are more likely to see cheaper flights to Tucson from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Tucson for around $368 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Tucson from St. Louis for as low as $305 on momondo.

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

As of March 2026, prices for St. Louis to Tucson flights are approximately 5% more expensive when compared to flights at the same time last year.

When to book flights from St. Louis to Tucson

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

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

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

Fastest flight time

5h 40m

Direct flights

None
The fastest flight from St. Louis to Tucson takes 5h 40m
There are no direct flights from St. Louis to Tucson. There are no popular flight routes from St. Louis to Tucson.
Search flight deals

  • How far is Lambert-St Louis to Tucson by plane?

    The straight-line distance from Lambert-St Louis to Tucson is 1245.9 mi. Typically, this will take 5h 40m by plane in normal conditions.

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

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

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

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

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Lambert-St Louis Airport to Tucson Airport.

  • What documentation or ID do you need to fly to Tucson Airport?

    The travel and health documents you'll need for your trip to Tucson Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Tucson Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from St. Louis to Tucson?

Best airlines flying from St. Louis to Tucson

Compare and see reviews for airlines that fly from St. Louis to Tucson with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $143Free CancellationRating
7.9
8,312 reviews
Search Delta flights
United AirlinesPriceFrom $260Free CancellationRating
7.4
9,452 reviews
Search United Airlines flights
American AirlinesPriceFrom $266Free CancellationRating
7.1
11,488 reviews
Search American Airlines flights
SouthwestPriceFrom $286Free CancellationRating
8.0
4,325 reviews
Search Southwest flights

Traveling to a place near Tucson?

Book flights to Tucson if you plan to visit one of these locations
Tombstone
Bisbee
Sierra Vista
Oro Valley
Green Valley
Douglas

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Tucson from St. Louis.

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

Flights from St. Louis to Tucson 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 St. Louis to Tucson?

Once all potential St. Louis to Tucson 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 St. Louis to Tucson right now. Can momondo alert me if prices change?

If you are not ready to book a flight from St. Louis to Tucson now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Tucson and let you know when they change.

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