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$43+ Cheap flights from St. Louis (STL) to Arizona

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/8. Fares are subject to change and may not be available on all flights or dates of travel.
STL — PHX
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
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Cheap flight deals from St. Louis to Arizona

Keep the following information in mind while searching for St. Louis to Arizona flight deals. Data was last updated September 15, 2025.

Round-trip from

$143
(Priceline)

One-way from

$43
(Kiwi.com)

Popular in

March

Cheapest in

August

Average price

$366

Good round-trip deal

$286 or less

Good one-way deal

$149 or less
From Lambert-St Louis to Arizona
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One-way flight from Lambert-St Louis to Arizona
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Highest demand for flights based on searches. 7% potential increase in price ($32 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($8 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Lambert-St Louis to Arizona.
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Price to beat on a one-way flight from Lambert-St Louis to Arizona.
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Find flight deals from St. Louis to Arizona

Cheapest flights from St. Louis to Arizona
Explore the most affordable flight options available from St. Louis to Arizona. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2025.

This Kiwi.com deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/237:55 pmSTL - LAS
1 stop5h 38mFrontier
Mon 9/2912:59 amLAS - STL
1 stop6h 07mFrontier
Deal found 9/13$143
This Frontier deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/157:52 pmSTL - LAS
1 stop5h 37mFrontier
Fri 10/1712:59 amLAS - STL
1 stop6h 08mFrontier
Deal found 9/14$144
This Kiwi.com deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/39:35 pmSTL - LAS
Nonstop3h 36mFrontier
Mon 10/612:59 amLAS - STL
1 stop6h 08mFrontier
Deal found 9/13$146
This Gotogate deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/197:55 pmSTL - LAS
1 stop26h 56mFrontier
Sat 10/1810:30 amLAS - STL
Nonstop3h 26mFrontier
Deal found 9/13$147
This Cheapflightsfares deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/237:55 pmSTL - LAS
1 stop5h 38mFrontier
Fri 9/268:34 amLAS - STL
Nonstop3h 19mFrontier
Deal found 9/13$148
This Trip.com deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/207:55 pmSTL - LAS
1 stop5h 38mFrontier
Fri 9/2612:59 amLAS - STL
1 stop6h 07mFrontier
Deal found 9/13$149
This Cheapflightsfares deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/712:09 pmSTL - LAS
1 stop12h 03mFrontier
Thu 11/137:08 amLAS - STL
1 stop23h 59mFrontier
Deal found 9/13$150
This Cheapflightsfares deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/231:41 pmSTL - LAS
1 stop21h 46mFrontier
Mon 10/277:00 amLAS - STL
1 stop10h 26mFrontier
Deal found 9/12$151
This Frontier deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/712:09 pmSTL - LAS
1 stop12h 03mFrontier
Mon 11/108:48 pmLAS - STL
1 stop10h 19mFrontier
Deal found 9/13$152
This Booking.com deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/117:52 pmSTL - LAS
1 stop25h 03mFrontier
Mon 10/137:00 amLAS - STL
1 stop10h 26mFrontier
Deal found 9/13$153
This Booking.com deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/247:55 pmSTL - LAS
1 stop14h 07mFrontier
Sun 9/286:00 amLAS - STL
1 stop25h 06mFrontier
Deal found 9/14$154
This Trip.com deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/292:38 pmSTL - PHX
1 stop6h 56mFrontier
Tue 9/308:00 amPHX - STL
1 stop23h 06mFrontier
Deal found 9/14$158

Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated September 15, 2025.
Use the filters below to find and compare flights from St. Louis to Arizona that are best for you.

Fly from

St. Louis

Fly to

Arizona

Route

Depart

Return

Price

St. LouisLas Vegas

STL - LAS

STLLAS

Lambert-St Louis

Wed 11/26

5:24 pm-9:49 pm

1 stop6h 25m

Las Vegas Harry Reid Intl

Tue 12/2

1:01 pm-8:57 pm

1 stop5h 56m

$167

St. LouisLas Vegas

STL - LAS

STLLAS

Lambert-St Louis

Tue 12/9

4:37 pm-9:00 pm

1 stop6h 23m

Las Vegas Harry Reid Intl

Fri 12/12

12:59 am-10:04 am

1 stop7h 05m

$167

St. LouisLas Vegas

STL - LAS

STLLAS

Lambert-St Louis

Tue 2/17

10:10 am-3:33 pm

1 stop7h 23m

Las Vegas Harry Reid Intl

Sat 2/21

5:35 am-12:49 pm

1 stop5h 14m

$204

St. LouisPhoenix

STL - PHX

STLPHX

Lambert-St Louis

Mon 10/13

5:15 am-6:35 am

Nonstop3h 20m

Phoenix Sky Harbor Intl

Tue 10/21

7:35 pm-12:30 am

Nonstop2h 55m

$209

St. LouisLas Vegas

STL - LAS

STLLAS

Lambert-St Louis

Fri 10/31

6:00 am-10:15 am

1 stop6h 15m

Las Vegas Harry Reid Intl

Tue 11/4

5:13 pm-12:24 am

1 stop5h 11m

$217

St. LouisPhoenix

STL - PHX

STLPHX

Lambert-St Louis

Tue 10/14

5:20 pm-9:15 pm

1 stop5h 55m

Phoenix Sky Harbor Intl

Tue 10/28

7:35 pm-12:30 am

Nonstop2h 55m

$219

St. LouisPhoenix

STL - PHX

STLPHX

Lambert-St Louis

Sat 10/25

5:55 pm-7:15 pm

Nonstop3h 20m

Phoenix Sky Harbor Intl

Wed 10/29

11:50 am-7:05 pm

1 stop5h 15m

$219

St. LouisPhoenix

STL - PHX

STLPHX

Lambert-St Louis

Wed 10/22

7:30 pm-11:38 pm

1 stop6h 08m

Phoenix Sky Harbor Intl

Fri 10/24

12:40 am-8:51 am

1 stop6h 11m

$237

St. LouisPhoenix

STL - PHX

STLPHX

Lambert-St Louis

Thu 11/6

7:40 pm-12:38 am

1 stop5h 58m

Phoenix Sky Harbor Intl

Mon 11/10

12:59 am-8:55 am

1 stop6h 56m

$237

St. LouisLas Vegas

STL - LAS

STLLAS

Lambert-St Louis

Sun 2/8

2:55 pm-10:20 pm

1 stop9h 25m

Las Vegas Harry Reid Intl

Wed 2/11

10:45 am-1:52 pm

1 stop25h 07m

$246

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Showing 1-10 of 60 results
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Best time to book a flight from St. Louis to Arizona

Have a flexible travel schedule? Discover the best time to fly to Arizona from St. Louis with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Arizona

What is the cheapest month to book a flight from St. Louis to Arizona?

Currently, January is the cheapest month in which you can book a flight from St. Louis to Arizona (average of $258). Flying from St. Louis to Arizona in March is currently the most expensive (average of $337). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from STL to AZ?

Find hourly flight availability from St. Louis to Arizona. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 15, 2025.

When flying from St. Louis to Arizona, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from St. Louis to Arizona

Explore weekly flight availability from St. Louis to Arizona. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated September 15, 2025.

The most flights from STL to USAZ are scheduled on a Monday (10 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (1 on average).

Reviews of airlines servicing Arizona

Get insights into the airlines that provide service to Arizona. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Arizona. Reviews last updated September 15, 2025.
Get a feel of what it's like to fly with Southwest, Delta, and United Airlines from St. Louis to Arizona by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,245 reviews

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Food

7.0

Crew

8.6

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Southwest
8.0
Very good
4,245 reviews
Southwest
8.0
Very good
4,245 reviews

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Food

7.0

Crew

8.6

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Delta
8.0
Very good
7,956 reviews
Southwest
8.0
Very good
4,245 reviews

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Food

7.0

Crew

8.6

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
United Airlines
7.4
Good
8,931 reviews
Southwest
8.0
Very good
4,245 reviews

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Food

7.0

Crew

8.6

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,245 reviews

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Food

7.0

Crew

8.6

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Frontier
5.8
Fair
3,173 reviews
Southwest
8.0
Very good
4,245 reviews

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Food

7.0

Crew

8.6

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Arizona. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from St. Louis to Arizona?

    Lambert-St Louis (STL) is the airport you will fly out of if you book a flight from St. Louis to Arizona. It is only a 12.7 mi journey to Lambert-St Louis (STL) from St. Louis’s city center.

  • How long is the flight from St. Louis to Arizona?

    A quick flight from St. Louis to Arizona can take about 3h 20m. United Airlines provides one of the quickest options available for as low as $209. The distance from St. Louis to Arizona is about 1258 mi. This flight may include one or multiple stops.

  • What are the most popular routes from St. Louis to Arizona?

    While some choose either Lambert-St Louis - Phoenix Sky Harbor Intl or Lambert-St Louis - Tucson, Lambert-St Louis - Las Vegas Harry Reid Intl is the most popular route from St. Louis to Arizona.

  • What are the most reliable airlines from St. Louis to Arizona?

    Consider SkyWest Airlines (75%), Southwest (69%) or American Airlines (60%) when booking your flight. These represent the most reliable airlines when flying from St. Louis to Arizona.

  • What are the cheapest flights from St. Louis to Arizona?

    The cheapest flight price from St. Louis to Arizona is $103. On average you can expect to pay $297. The most popular route, (Lambert-St Louis - Las Vegas Harry Reid Intl), can usually be booked for $138.

  • Can I find deals for flights from St. Louis to Arizona that include hotel bookings?

    Yes. In addition to deals on St. Louis to Arizona flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Arizona?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Arizona.

  • Can I find deals for business class flights from St. Louis to Arizona?

    Yes. Cheapflights offers flight deals from St. Louis to Arizona by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from St. Louis to Arizona?

    Currently, January is the cheapest month in which you can book a flight from St. Louis to Arizona (average of $258). Flying from St. Louis to Arizona in March is currently the most expensive (average of $337). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for St. Louis to Arizona

See prices for flight routes from nearby airports that may be better suited for you.
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Top 6 airlines flying from St. Louis to Arizona

Discover the top 6 airlines that operate flights from St. Louis to Arizona. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$106Average$210FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$158Average$200FlexibilityNo cancel feeOn-time65%
DeltaCheapest$236Average$377FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$264Average$471FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$274Average$417FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$294Average$421FlexibilityNo cancel feeOn-time69%

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