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$37+ 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 1/5. Fares are subject to change and may not be available on all flights or dates of travel.
STL — PHX
Dec 6 — Dec 131
Sat 12/6
Sat 12/13
1 adult, Economy
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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 November 6, 2025.

This Kiwi.com deal was found by Cheapflights users on 11/6. 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.
Sat 12/207:43 pmSTL - LAS
1 stop5h 59mFrontier
Wed 12/2410:31 pmLAS - STL
1 stop9h 09mFrontier
Deal found 11/6$147
This Kiwi.com deal was found by Cheapflights users on 11/6. 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 12/1910:10 pmSTL - LAS
Nonstop3h 52mFrontier
Wed 12/2410:31 pmLAS - STL
2 stops22h 02mFrontier
Deal found 11/6$149
This Super.com deal was found by Cheapflights users on 11/5. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/151:16 pmSTL - LAS
Nonstop3h 46mFrontier
Thu 12/1811:03 amLAS - STL
Nonstop3h 21mFrontier
Deal found 11/5$150
This Kiwi.com deal was found by Cheapflights users on 11/6. 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.
Wed 11/197:45 pmSTL - LAS
2 stops16h 38mMultiple Airlines
Wed 11/263:50 pmLAS - STL
Nonstop3h 19mMultiple Airlines
Deal found 11/6$152
This Mytrip deal was found by Cheapflights users on 11/5. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/213:53 pmSTL - LAS
1 stop9h 02mFrontier
Sat 11/2212:59 amLAS - STL
1 stop15h 59mFrontier
Deal found 11/5$153
This Kiwi.com deal was found by Cheapflights users on 11/4. 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.
Mon 11/179:07 pmSTL - LAS
Nonstop3h 38mFrontier
Thu 11/208:00 pmLAS - STL
2 stops12h 02mFrontier
Deal found 11/4$154
This Kiwi.com deal was found by Cheapflights users on 11/6. 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.
Thu 12/412:04 pmSTL - LAS
1 stop22h 34mMultiple Airlines
Sun 12/77:00 amLAS - STL
Nonstop3h 12mMultiple Airlines
Deal found 11/6$155
This Kiwi.com deal was found by Cheapflights users on 11/4. 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.
Mon 11/172:42 pmSTL - LAS
Nonstop3h 40mFrontier
Sun 11/2311:00 pmLAS - STL
2 stops17h 19mFrontier
Deal found 11/4$157
This Kiwi.com deal was found by Cheapflights users on 11/6. 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.
Wed 12/107:43 pmSTL - LAS
2 stops15h 23mFrontier
Wed 12/2410:31 pmLAS - STL
1 stop9h 09mFrontier
Deal found 11/6$159
This Trip.com deal was found by Cheapflights users on 11/4. 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 11/154:51 pmSTL - PHX
1 stop7h 38mFrontier
Fri 11/2111:14 amPHX - STL
Nonstop2h 54mFrontier
Deal found 11/4$159
This Kiwi.com deal was found by Cheapflights users on 11/5. 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.
Mon 12/2210:10 pmSTL - LAS
Nonstop3h 52mFrontier
Fri 1/26:30 amLAS - STL
1 stop11h 17mFrontier
Deal found 11/5$160
This CheapOair deal was found by Cheapflights users on 11/5. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/179:07 pmSTL - PHX
1 stop26h 17mFrontier
Fri 11/2111:14 amPHX - STL
Nonstop2h 54mFrontier
Deal found 11/5$160

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 November 6, 2025.

Round-trip from

$149
(Kiwi.com)

One-way from

$37
(Kiwi.com)

Popular in

March

Cheapest in

November

Average price

$328

Good round-trip deal

$257 or less

Good one-way deal

$160 or less
From Lambert-St Louis to Arizona
Search Deals
One-way flight from Lambert-St Louis to Arizona
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($39 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals
Price to beat on a round-trip flight from Lambert-St Louis to Arizona.
Search Deals
Price to beat on a one-way flight from Lambert-St Louis to Arizona.
Search Deals

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 November 6, 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

Tue 1/27

11:23 am-5:26 pm

1 stop8h 03m

Las Vegas Harry Reid Intl

Sat 1/31

6:00 am-2:48 pm

1 stop6h 48m

$157

St. LouisLas Vegas

STL - LAS

STLLAS

Lambert-St Louis

Tue 1/13

6:10 am-12:36 pm

1 stop8h 26m

Las Vegas Harry Reid Intl

Wed 1/21

6:15 am-2:38 pm

1 stop6h 23m

$157

St. LouisLas Vegas

STL - LAS

STLLAS

Lambert-St Louis

Mon 2/2

5:00 pm-11:32 pm

1 stop8h 32m

Las Vegas Harry Reid Intl

Mon 2/9

6:15 am-2:38 pm

1 stop6h 23m

$157

St. LouisPhoenix

STL - PHX

STLPHX

Lambert-St Louis

Mon 1/12

8:45 am-11:36 pm

2 stops15h 51m

Phoenix Sky Harbor Intl

Tue 1/20

5:12 pm-10:02 am

1 stop15h 50m

$170

St. LouisPhoenix

STL - PHX

STLPHX

Lambert-St Louis

Mon 2/2

7:43 pm-4:04 pm

1 stop21h 21m

Phoenix Sky Harbor Intl

Sat 2/7

6:54 pm-9:47 am

2 stops13h 53m

$174

St. LouisPhoenix

STL - PHX

STLPHX

Lambert-St Louis

Mon 1/12

8:45 am-11:36 pm

2 stops15h 51m

Phoenix Sky Harbor Intl

Sun 1/18

10:31 pm-10:04 am

1 stop10h 33m

$188

St. LouisLas Vegas

STL - LAS

STLLAS

Lambert-St Louis

Tue 2/3

6:00 am-7:45 am

Nonstop3h 45m

Las Vegas Harry Reid Intl

Tue 2/10

6:35 am-11:40 am

Nonstop3h 05m

$197

St. LouisPhoenix

STL - PHX

STLPHX

Lambert-St Louis

Mon 11/10

12:09 pm-2:31 pm

Nonstop3h 22m

Phoenix Sky Harbor Intl

Wed 11/12

9:05 pm-9:07 am

1 stop11h 02m

$209

St. LouisLas Vegas

STL - LAS

STLLAS

Lambert-St Louis

Thu 1/22

10:15 am-2:45 pm

2 stops6h 30m

Las Vegas Harry Reid Intl

Sun 1/25

6:40 am-2:10 pm

1 stop5h 30m

$222

St. LouisLas Vegas

STL - LAS

STLLAS

Lambert-St Louis

Sun 1/11

7:10 am-10:45 am

1 stop5h 35m

Las Vegas Harry Reid Intl

Sat 1/17

11:00 am-8:05 pm

2 stops7h 05m

$222

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/5

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, October is the cheapest month in which you can book a flight from St. Louis to Arizona (average of $122). Flying from St. Louis to Arizona in June is currently the most expensive (average of $235). 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 November 6, 2025.

A simple way to save on the total cost of your ticket is to fly from St. Louis to Arizona in the evening. If you’re flexible enough to do this you can expect to save up to 52% on your trip compared to booking a flight at noon.

What is the cheapest day to fly from St. Louis to Arizona?

Use this chart to determine the cheapest time to fly round-trip from St. Louis to Arizona. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their St. Louis to Arizona flight should consider departing on Friday evenings when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

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 November 6, 2025.

The most flights from STL to USAZ are scheduled on a Thursday (10 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (4 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 November 6, 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
4,241 reviews

Food

7.0

Crew

8.6

Comfort

8.0

Entertainment

7.5

Overall

8.0

Boarding

8.1

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
4,241 reviews
Southwest
8.0
Very good
4,241 reviews

Food

7.0

Crew

8.6

Comfort

8.0

Entertainment

7.5

Overall

8.0

Boarding

8.1

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
7.9
Good
8,001 reviews
Southwest
8.0
Very good
4,241 reviews

Food

7.0

Crew

8.6

Comfort

8.0

Entertainment

7.5

Overall

8.0

Boarding

8.1

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
9,007 reviews
Southwest
8.0
Very good
4,241 reviews

Food

7.0

Crew

8.6

Comfort

8.0

Entertainment

7.5

Overall

8.0

Boarding

8.1

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
11,040 reviews
Southwest
8.0
Very good
4,241 reviews

Food

7.0

Crew

8.6

Comfort

8.0

Entertainment

7.5

Overall

8.0

Boarding

8.1

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
3,115 reviews
Southwest
8.0
Very good
4,241 reviews

Food

7.0

Crew

8.6

Comfort

8.0

Entertainment

7.5

Overall

8.0

Boarding

8.1

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 45m. Delta provides one of the quickest options available for as low as $197. The distance from St. Louis to Arizona is about 1367 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from St. Louis to Arizona one-way?

    For one-way options, check prices for Southwest. According to our data, you can fly for as low as $70. Users have also found prices from $79 and $79 on Delta and Frontier, respectively.

  • 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 (100%), Alaska Airlines (83%) or American Airlines (82%) 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 $69. On average you can expect to pay $409. The most popular route, (Lambert-St Louis - Las Vegas Harry Reid Intl), can usually be booked for $116.

  • 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, October is the cheapest month in which you can book a flight from St. Louis to Arizona (average of $122). Flying from St. Louis to Arizona in June is currently the most expensive (average of $235). 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.

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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 November 6, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$94Average$207FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$158Average$200FlexibilityNo cancel feeOn-time65%
United AirlinesCheapest$223Average$391FlexibilityNo cancel feeOn-time69%
DeltaCheapest$236Average$372FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$237Average$455FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$248Average$407FlexibilityNo cancel feeOn-time63%

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