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Cheap flights from St. Louis to Arizona from $56

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 Arizona departing on 8/29. 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

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from St. Louis to Arizona

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
8:10 pm - 11:31 pm
STL
-
LAS
5h 21m
1 stop
Frontier Logo
8:17 am - 5:44 pm
LAS
-
STL
7h 27m
1 stop
$144Frontier
Fri, Sep 25 - Sun, Oct 4
Frontier Logo
12:46 pm - 2:29 pm
STL
-
LAS
3h 43mnonstop
Frontier Logo
8:17 am - 5:44 pm
LAS
-
STL
7h 27m
1 stop
$169Frontier
Tue, Sep 15 - Mon, Sep 21
Frontier Logo
10:35 am - 10:29 pm
STL
-
LAS
13h 54m
1 stop
Frontier Logo
6:35 am - 11:51 am
LAS
-
STL
3h 16mnonstop
$181Frontier
Wed, Sep 30 - Wed, Oct 7
Frontier Logo
10:35 am - 10:29 pm
STL
-
LAS
13h 54m
1 stop
Frontier Logo
6:35 am - 11:51 am
LAS
-
STL
3h 16mnonstop
$182Frontier
Tue, Sep 29 - Wed, Oct 7
American Airlines Logo
8:00 am - 9:18 am
STL
-
PHX
3h 18mnonstop
American Airlines Logo
12:30 pm - 5:37 pm
PHX
-
STL
3h 07mnonstop
$243American Airlines
Wed, Aug 5 - Tue, Aug 11
Southwest Logo
6:00 am - 7:15 am
STL
-
PHX
3h 15mnonstop
Southwest Logo
6:00 am - 10:55 am
PHX
-
STL
2h 55mnonstop
$244Southwest
Fri, Aug 21 - Tue, Aug 25
American Airlines Logo
2:46 pm - 4:00 pm
STL
-
PHX
3h 14mnonstop
American Airlines Logo
12:30 pm - 5:37 pm
PHX
-
STL
3h 07mnonstop
$249American Airlines
Tue, Aug 4 - Tue, Aug 11
Southwest Logo
8:45 pm - 9:55 pm
STL
-
PHX
3h 10mnonstop
Southwest Logo
10:50 am - 5:55 pm
PHX
-
STL
5h 05m
1 stop
$254Southwest
Wed, Aug 5 - Tue, Aug 11
United Airlines Logo
4:40 pm - 8:14 pm
STL
-
TUS
5h 34m
1 stop
United Airlines Logo
1:34 pm - 8:34 pm
TUS
-
STL
5h 00m
1 stop
$341United Airlines
Tue, Oct 27 - Wed, Oct 28
United Airlines Logo
5:00 am - 12:28 pm
STL
-
TUS
9h 28m
2 stops
United Airlines Logo
1:34 pm - 8:34 pm
TUS
-
STL
5h 00m
1 stop
$346United Airlines
Tue, Oct 27 - Wed, Oct 28

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Frontier flights from St. Louis to Arizona

Our best Frontier deals on St. Louis to Arizona flight tickets
Frontier
Sep 25
STL8:10 pmLambert-St Louis
5h 21m
1 stop
LAS11:31 pmLas Vegas Harry Reid Intl
Oct 4
LAS8:17 amLas Vegas Harry Reid Intl
7h 27m
1 stop
STL5:44 pmLambert-St Louis
$144
Frontier
Sep 15
STL12:46 pmLambert-St Louis
3h 43m
LAS2:29 pmLas Vegas Harry Reid Intl
Sep 21
LAS8:17 amLas Vegas Harry Reid Intl
7h 27m
1 stop
STL5:44 pmLambert-St Louis
$169
Frontier
Oct 10
STL5:14 pmLambert-St Louis
3h 43m
LAS6:57 pmLas Vegas Harry Reid Intl
Oct 13
LAS10:30 amLas Vegas Harry Reid Intl
6h 45m
1 stop
STL7:15 pmLambert-St Louis
$177

Southwest flights from St. Louis to Arizona

Our best Southwest deals on St. Louis to Arizona flight tickets
Southwest
Aug 21
STL6:00 amLambert-St Louis
3h 15m
PHX7:15 amPhoenix Sky Harbor Intl
Aug 25
PHX6:00 amPhoenix Sky Harbor Intl
2h 55m
STL10:55 amLambert-St Louis
$244
Southwest
Aug 5
STL8:45 pmLambert-St Louis
3h 10m
PHX9:55 pmPhoenix Sky Harbor Intl
Aug 11
PHX10:50 amPhoenix Sky Harbor Intl
5h 05m
1 stop
STL5:55 pmLambert-St Louis
$254
Southwest
Aug 21
STL2:20 pmLambert-St Louis
4h 30m
1 stop
PHX4:50 pmPhoenix Sky Harbor Intl
Aug 25
PHX6:15 amPhoenix Sky Harbor Intl
6h 10m
1 stop
STL2:25 pmLambert-St Louis
$259

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Arizona 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 July 8, 2026.
Use the filters below to find and compare flights from St. Louis to Arizona that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisLas Vegas

STL - LAS

STLLAS

Lambert-St Louis

Fri 9/25

8:10 pm-11:31 pm

1 stop5h 21m

Las Vegas Harry Reid Intl

Sun 10/4

8:17 am-5:44 pm

1 stop7h 27m

$144

St. LouisLas Vegas

STL - LAS

STLLAS

Lambert-St Louis

Tue 9/15

12:46 pm-2:29 pm

Nonstop3h 43m

Las Vegas Harry Reid Intl

Mon 9/21

8:17 am-5:44 pm

1 stop7h 27m

$169

St. LouisLas Vegas

STL - LAS

STLLAS

Lambert-St Louis

Wed 9/30

10:35 am-10:29 pm

1 stop13h 54m

Las Vegas Harry Reid Intl

Wed 10/7

6:35 am-11:51 am

Nonstop3h 16m

$181

St. LouisLas Vegas

STL - LAS

STLLAS

Lambert-St Louis

Tue 9/29

10:35 am-10:29 pm

1 stop13h 54m

Las Vegas Harry Reid Intl

Wed 10/7

6:35 am-11:51 am

Nonstop3h 16m

$182

St. LouisPhoenix

STL - PHX

STLPHX

Lambert-St Louis

Wed 8/5

8:00 am-9:18 am

Nonstop3h 18m

Phoenix Sky Harbor Intl

Tue 8/11

12:30 pm-5:37 pm

Nonstop3h 07m

$243
Quickest round-trip

St. LouisPhoenix

STL - PHX

STLPHX

Lambert-St Louis

Fri 8/21

6:00 am-7:15 am

Nonstop3h 15m

Phoenix Sky Harbor Intl

Tue 8/25

6:00 am-10:55 am

Nonstop2h 55m

$244

St. LouisPhoenix

STL - PHX

STLPHX

Lambert-St Louis

Tue 8/4

2:46 pm-4:00 pm

Nonstop3h 14m

Phoenix Sky Harbor Intl

Tue 8/11

12:30 pm-5:37 pm

Nonstop3h 07m

$249

St. LouisPhoenix

STL - PHX

STLPHX

Lambert-St Louis

Wed 8/5

8:45 pm-9:55 pm

Nonstop3h 10m

Phoenix Sky Harbor Intl

Tue 8/11

10:50 am-5:55 pm

1 stop5h 05m

$254

St. LouisTucson

STL - TUS

STLTUS

Lambert-St Louis

Tue 10/27

4:40 pm-8:14 pm

1 stop5h 34m

Tucson

Wed 10/28

1:34 pm-8:34 pm

1 stop5h 00m

$341

St. LouisTucson

STL - TUS

STLTUS

Lambert-St Louis

Tue 10/27

5:00 am-12:28 pm

2 stops9h 28m

Tucson

Wed 10/28

1:34 pm-8:34 pm

1 stop5h 00m

$346

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 Arizona from

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

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 Arizona?

The month of December is, on average, the cheapest month to fly to Arizona from St. Louis, with most prices found around $40. If you aren’t able to travel to Arizona during the month of December, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $54.

What is the cheapest day to depart on your flight to Arizona?

On average, the least expensive day to fly to Arizona from St. Louis is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as $388. However, this price may fluctuate depending on the airline, the season, and holidays. The most expensive day to fly to Arizona is Sunday, with ticket prices averaging around $458.

What is the cheapest time of day to depart on your flight to Arizona?

Our most recent data shows that the best time of day to fly to Arizona is in the evening. Flights from St. Louis to Arizona during this time can be as low as $311. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $446 on average. Flights to Arizona from St. Louis in the morning are generally more expensive because this time of day is more convenient for travelers’ schedules.

What is the cheapest Lambert-St Louis to Arizona flight route?

Fly from Lambert-St Louis to Phoenix Sky Harbor Intl for the best Lambert-St Louis - Arizona flight prices

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

You are more likely to see cheaper flights to Arizona from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Arizona for around $359 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Arizona from St. Louis for as low as $297 on momondo.

What cabin class options are available on St. Louis to Arizona flights?

There are 4 cabin classes available to choose from on St. Louis to Arizona flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on St. Louis to Arizona flights?

You could potentially save up to 5% on your flight if you consider stops on a St. Louis to Arizona flight.

Cheap St. Louis to Arizona flight deals and tips

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

Best Price Found

$227

Fastest flight time

3h 10m

Direct flights

Every day

Airports in Arizona

66 airports
The best one-way flight to Arizona from St. Louis in the past 72 hours is $227. The best round-trip flight deal from St. Louis to Arizona found on momondo in the last 72 hours is $411.
The fastest flight from St. Louis to Arizona takes 3h 10m
Direct flights go from St. Louis to Arizona every day.
There are 66 airports in Arizona. From St. Louis there are direct flights to Phoenix Sky Harbor Intl (PHX), Las Vegas Harry Reid Intl (LAS).
Search flight deals

Frequently asked questions about flying from St. Louis to Arizona

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

    Prices for flights from Lambert-St Louis Airport to Arizona refresh daily.

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

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Arizona.

  • What documentation or ID do you need to fly to Arizona?

    The travel and health documents you'll need for your trip to Arizona 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 Arizona. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from St. Louis to Arizona?

Best airlines flying from St. Louis to Arizona

Compare and see reviews for airlines that fly from St. Louis to Arizona with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $94Free CancellationRating
5.6
2,836 reviews
Search Frontier flights
United AirlinesPriceFrom $148Free CancellationRating
7.4
9,948 reviews
Search United Airlines flights
American AirlinesPriceFrom $211Free CancellationRating
7.1
11,783 reviews
Search American Airlines flights
SouthwestPriceFrom $220Free CancellationRating
7.9
4,250 reviews
Search Southwest flights

Why use momondo?

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

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

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

Flights from St. Louis to Arizona 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 Arizona?

momondo provides multiple filters to help you find the best flight to Arizona from St. Louis. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

If you are simply researching potential flights to Arizona, momondo offers a useful price alert feature which will track prices for flights to Arizona from St. Louis and alert you when they change.

An easier way to manage your Arizona trip

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