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$34+ Cheap flights from Arizona to St. Louis (STL)

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 1/8. Fares are subject to change and may not be available on all flights or dates of travel.
PHX — STL
Jan 22 — Jan 291
Thu 1/22
Thu 1/29
1 adult, Economy
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Cheap flight deals from Arizona to St. Louis

Cheapest flights from Arizona to St. Louis
Explore the most affordable flight options available from Arizona to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 23, 2025.

This Super.com deal was found by Cheapflights users on 12/21. 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.
Wed 12/3111:03 amLAS - STL
Nonstop3h 21mFrontier
Sat 1/310:10 pmSTL - LAS
Nonstop3h 52mFrontier
Deal found 12/21$175
This Cheapflightsfares deal was found by Cheapflights users on 12/22. 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.
Mon 12/294:05 pmLAS - STL
Nonstop3h 20mFrontier
Tue 1/65:11 pmSTL - LAS
1 stop18h 32mFrontier
Deal found 12/22$192
This Frontier deal was found by Cheapflights users on 12/20. 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.
Mon 12/224:10 pmPHX - STL
Nonstop2h 57mFrontier
Sat 1/37:43 pmSTL - PHX
1 stop6h 01mFrontier
Deal found 12/20$206
This Frontier deal was found by Cheapflights users on 12/21. 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.
Sun 12/284:05 pmLAS - STL
Nonstop3h 20mFrontier
Mon 1/510:10 pmSTL - LAS
Nonstop3h 52mFrontier
Deal found 12/21$213
This Frontier deal was found by Cheapflights users on 12/20. 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 12/263:50 pmPHX - STL
Nonstop2h 57mFrontier
Sat 1/37:43 pmSTL - PHX
1 stop6h 01mFrontier
Deal found 12/20$216
This Kiwi.com deal was found by Cheapflights users on 12/22. 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 12/294:10 pmPHX - STL
Nonstop2h 57mFrontier
Wed 12/317:43 pmSTL - PHX
1 stop5h 46mFrontier
Deal found 12/22$227
This Frontier deal was found by Cheapflights users on 12/20. 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.
Mon 12/224:10 pmPHX - STL
Nonstop2h 57mFrontier
Fri 1/210:10 pmSTL - PHX
1 stop12h 30mFrontier
Deal found 12/20$230
This Kiwi.com deal was found by Cheapflights users on 12/20. 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 12/224:10 pmPHX - STL
Nonstop2h 57mFrontier
Thu 1/81:07 pmSTL - PHX
1 stop20h 51mFrontier
Deal found 12/20$233
This Frontier deal was found by Cheapflights users on 12/20. 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 12/249:58 amPHX - STL
1 stop5h 26mFrontier
Sat 1/37:43 pmSTL - PHX
1 stop6h 01mFrontier
Deal found 12/20$234
This Kiwi.com deal was found by Cheapflights users on 12/20. 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 12/224:10 pmPHX - STL
Nonstop2h 57mFrontier
Thu 1/15:19 pmSTL - PHX
1 stop16h 29mFrontier
Deal found 12/20$237
This Frontier deal was found by Cheapflights users on 12/20. 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 12/263:50 pmPHX - STL
Nonstop2h 57mFrontier
Fri 1/210:10 pmSTL - PHX
1 stop12h 30mFrontier
Deal found 12/20$240
This Kiwi.com deal was found by Cheapflights users on 12/20. 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 12/263:50 pmPHX - STL
Nonstop2h 57mFrontier
Thu 1/81:07 pmSTL - PHX
1 stop20h 51mFrontier
Deal found 12/20$243

Find flight deals from Arizona to St. Louis

Keep the following information in mind while searching for Arizona to St. Louis flight deals. Data was last updated December 23, 2025.

Round-trip from

$79
(Kiwi.com)

One-way from

$34
(eDestinos)

Popular in

April

Cheapest in

November

Average price

$374

Good round-trip deal

$283 or less

Good one-way deal

$115 or less
From Arizona to Lambert-St Louis
Search Deals
One-way flight from Arizona to Lambert-St Louis
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($30 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip flight from Arizona to Lambert-St Louis.
Search Deals
Price to beat on a one-way flight from Arizona to Lambert-St Louis.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Arizona to St. Louis 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 December 23, 2025.
Use the filters below to find and compare flights from Arizona to St. Louis that are best for you.

Fly from

Arizona

Fly to

St. Louis

Route

Depart

Return

Price

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Fri 1/16

7:25 am-12:40 pm

Nonstop3h 15m

Lambert-St Louis

Sun 1/18

10:09 pm-11:57 pm

Nonstop3h 48m

$79

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Fri 1/9

4:01 pm-9:21 pm

Nonstop3h 20m

Lambert-St Louis

Sun 1/18

10:09 pm-11:57 pm

Nonstop3h 48m

$80

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Thu 2/5

3:50 pm-9:06 pm

Nonstop3h 16m

Lambert-St Louis

Thu 2/12

10:11 pm-11:59 pm

Nonstop3h 48m

$90

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Fri 1/23

3:32 pm-8:48 pm

Nonstop3h 16m

Lambert-St Louis

Mon 1/26

9:45 pm-11:44 pm

Nonstop3h 59m

$125

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Fri 2/27

6:40 pm-1:56 pm

1 stop17h 16m

Lambert-St Louis

Sun 3/1

10:11 pm-11:59 pm

Nonstop3h 48m

$130

PhoenixSt. Louis

PHX - STL

PHXSTL

Phoenix Sky Harbor Intl

Fri 2/6

9:22 am-6:44 pm

1 stop8h 22m

Lambert-St Louis

Sat 2/7

3:46 pm-8:12 am

1 stop17h 26m

$167

PhoenixSt. Louis

PHX - STL

PHXSTL

Phoenix Sky Harbor Intl

Wed 1/7

5:35 pm-12:12 pm

1 stop17h 37m

Lambert-St Louis

Wed 2/4

3:46 pm-10:37 am

2 stops19h 51m

$175

PhoenixSt. Louis

PHX - STL

PHXSTL

Phoenix Sky Harbor Intl

Thu 1/22

11:47 am-9:06 pm

1 stop8h 19m

Lambert-St Louis

Mon 1/26

1:40 pm-12:40 am

1 stop12h 00m

$182

PhoenixSt. Louis

PHX - STL

PHXSTL

Phoenix Sky Harbor Intl

Sun 1/18

6:00 am-6:51 am

1 stop23h 51m

Lambert-St Louis

Sun 1/25

9:27 pm-8:20 am

1 stop11h 53m

$183

PhoenixSt. Louis

PHX - STL

PHXSTL

Phoenix Sky Harbor Intl

Fri 1/9

9:22 pm-10:02 am

1 stop11h 40m

Lambert-St Louis

Sun 1/11

9:46 pm-8:58 am

1 stop12h 12m

$189

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/21

Showing 1-10 of 47 results
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Best time to book a flight from Arizona to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Arizona 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 Arizona to St. Louis

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

Currently, October is the cheapest month in which you can book a flight from Arizona to St. Louis (average of $111). Flying from Arizona to St. Louis in April is currently the most expensive (average of $266). 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 AZ to STL?

Find hourly flight availability from Arizona to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 23, 2025.

It’s optimal to fly from Arizona to St. Louis in the afternoon. By choosing this option you can save up to 32% on the cost of your flight, compared to a flight in the morning.

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

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

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

Related info for your journey

Find useful and relevant information for your journey from Arizona to St. Louis. 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 into for flights to St. Louis from Arizona?

    Located just 12.7 mi from the city center, Lambert-St Louis (STL) is the airport most travelers will use when flying to St. Louis from Arizona.

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

    A quick flight from Arizona to St. Louis can take about 3h 15m. Frontier provides one of the quickest options available for as low as $79. There are 1367 mi between Arizona and St. Louis. Both multi-stop and nonstop flights can be found to your destination and back.

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

    One-way options have recently been found by users for as low as $70 on Frontier. Other airlines that offer cheap prices include United Airlines from $128 and Delta from $133 one-way.

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

    The most popular route from Arizona to St. Louis is Phoenix Sky Harbor Intl - Lambert-St Louis. You may also consider Tucson - Lambert-St Louis or Las Vegas Harry Reid Intl - Lambert-St Louis.

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

    The top 3 most reliable airlines when flying from Arizona to St. Louis are SkyWest Airlines (100%), Alaska Airlines (89%) and American Airlines (88%).

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

    While on average a flight from Arizona to St. Louis is generally $276, our data shows the cheapest flight currently is $79. When looking at the most popular route, (Phoenix Sky Harbor Intl - Lambert-St Louis), you can expect to pay $169 for that flight.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Arizona to St. Louis 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 Arizona to St. Louis?

    Currently, October is the cheapest month in which you can book a flight from Arizona to St. Louis (average of $111). Flying from Arizona to St. Louis in April is currently the most expensive (average of $266). 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

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
Edwardsville
O'Fallon
Swansea
Fairview Heights
Maryland Heights
Collinsville
Eureka
Glencoe
Chesterfield
Alton
Farmington
Festus

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Top 5 airlines flying from Arizona to St. Louis

Discover the top 5 airlines that operate flights from Arizona to St. Louis. 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 December 23, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$120Average$222FlexibilityNo cancel feeOn-time62%
DeltaCheapest$134Average$357FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$198Average$405FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$229Average$432FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$262Average$398FlexibilityNo cancel feeOn-time63%

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