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$27+ 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 12/29. Fares are subject to change and may not be available on all flights or dates of travel.
PHX — STL
Dec 6 — Dec 131
Sat 12/6
Sat 12/13
1 adult, Economy
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Cheap 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 November 6, 2025.

Round-trip from

$88
(Priceline)

One-way from

$27
(Kiwi.com)

Popular in

January

Cheapest in

November

Average price

$337

Good round-trip deal

$229 or less

Good one-way deal

$143 or less
From Arizona to Lambert-St Louis
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One-way flight from Arizona to Lambert-St Louis
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Highest demand for flights based on searches. 8% potential increase in price ($33 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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Price to beat on a round-trip flight from Arizona to Lambert-St Louis.
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Price to beat on a one-way flight from Arizona to Lambert-St Louis.
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Find 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 November 6, 2025.

This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/1510:30 amLAS - STL
Nonstop3h 26mFrontier
Sun 11/233:14 pmSTL - LAS
1 stop8h 54mFrontier
Deal found 11/6$96
This Super.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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/216:00 amLAS - STL
Nonstop3h 16mFrontier
Wed 11/269:54 pmSTL - LAS
Nonstop3h 45mFrontier
Deal found 11/6$107
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/263:50 pmLAS - STL
Nonstop3h 19mFrontier
Sun 11/309:54 pmSTL - LAS
Nonstop3h 45mFrontier
Deal found 11/6$108
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 11/203:50 pmLAS - STL
Nonstop3h 19mFrontier
Sun 11/239:54 pmSTL - LAS
Nonstop3h 45mFrontier
Deal found 11/6$115
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 12/57:00 amLAS - STL
Nonstop3h 12mFrontier
Sun 12/71:16 pmSTL - LAS
Nonstop3h 46mFrontier
Deal found 11/6$123
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/2112:59 amLAS - STL
1 stop7h 03mFrontier
Fri 11/2812:01 pmSTL - LAS
Nonstop3h 45mFrontier
Deal found 11/6$126
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.
Tue 12/910:20 pmLAS - STL
1 stop22h 13mFrontier
Sun 12/141:16 pmSTL - LAS
Nonstop3h 46mFrontier
Deal found 11/5$127
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.
Fri 12/1912:59 amLAS - STL
1 stop7h 03mFrontier
Thu 1/15:19 pmSTL - LAS
Nonstop3h 49mFrontier
Deal found 11/5$129
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/24:32 pmPHX - STL
1 stop16h 42mFrontier
Thu 12/41:16 pmSTL - PHX
1 stop20h 32mFrontier
Deal found 11/6$145
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.
Fri 12/263:50 pmPHX - STL
Nonstop2h 57mFrontier
Mon 12/298:52 pmSTL - PHX
Nonstop3h 31mFrontier
Deal found 11/5$146
This Priceline deal was found by Cheapflights users on 11/3. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/177:25 amPHX - STL
Nonstop2h 59mFrontier
Sat 11/227:43 pmSTL - PHX
1 stop5h 49mFrontier
Deal found 11/3$147
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/38:25 amPHX - STL
Nonstop2h 55mSouthwest
Wed 12/108:50 amSTL - PHX
Nonstop3h 30mSouthwest
Deal found 11/5$149

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 November 6, 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

Thu 1/22

11:28 am-4:49 pm

Nonstop3h 21m

Lambert-St Louis

Sun 1/25

5:44 pm-7:33 pm

Nonstop3h 49m

$88

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Fri 11/21

12:59 am-10:02 am

1 stop7h 03m

Lambert-St Louis

Fri 11/28

12:01 pm-1:46 pm

Nonstop3h 45m

$126

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Thu 11/20

12:59 am-10:02 am

1 stop7h 03m

Lambert-St Louis

Wed 11/26

7:43 pm-11:36 pm

1 stop5h 53m

$141

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Mon 1/5

6:30 am-8:07 pm

1 stop11h 37m

Lambert-St Louis

Sun 1/11

9:47 pm-11:35 pm

Nonstop3h 48m

$151

PhoenixSt. Louis

PHX - STL

PHXSTL

Phoenix Sky Harbor Intl

Tue 12/9

1:30 pm-5:25 pm

Nonstop2h 55m

Lambert-St Louis

Fri 12/12

5:10 pm-7:35 pm

Nonstop3h 25m

$174

PhoenixSt. Louis

PHX - STL

PHXSTL

Phoenix Sky Harbor Intl

Fri 12/5

6:30 pm-10:20 pm

Nonstop2h 50m

Lambert-St Louis

Sat 12/6

5:25 am-7:55 am

Nonstop3h 30m

$174

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Mon 11/24

12:59 am-6:58 pm

1 stop15h 59m

Lambert-St Louis

Mon 12/1

9:54 pm-11:39 pm

Nonstop3h 45m

$175

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Mon 1/5

10:01 pm-10:33 pm

3 stops22h 32m

Lambert-St Louis

Sun 1/11

5:44 pm-7:33 pm

Nonstop3h 49m

$181

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Fri 11/14

12:59 am-9:07 am

1 stop6h 08m

Lambert-St Louis

Sun 11/23

7:03 pm-11:54 pm

1 stop6h 51m

$183

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Thu 11/20

12:59 am-10:02 am

1 stop7h 03m

Lambert-St Louis

Mon 11/24

7:04 pm-11:54 pm

1 stop6h 50m

$190

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 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, November is the cheapest month in which you can book a flight from Arizona to St. Louis (average of $109). 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 November 6, 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.

Weekly flight availability from Arizona to St. Louis

Explore weekly flight availability from Arizona to St. Louis. 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 USAZ to STL 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).

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 2h 55m. Frontier provides one of the quickest options available for as low as $174. There are 1258 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 $79 on Delta. Other airlines that offer cheap prices include Southwest from $99 and United Airlines from $109 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 Las Vegas Harry Reid Intl - Lambert-St Louis or Tucson - 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 (89%), Southwest (83%) and Alaska Airlines (78%).

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

    While on average a flight from Arizona to St. Louis is generally $262, our data shows the cheapest flight currently is $70. When looking at the most popular route, (Phoenix Sky Harbor Intl - Lambert-St Louis), you can expect to pay $149 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, November is the cheapest month in which you can book a flight from Arizona to St. Louis (average of $109). 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
Fairview Heights
Maryland Heights
Collinsville
Eureka
Glencoe
St. Peters
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 November 6, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$113Average$224FlexibilityNo cancel feeOn-time62%
DeltaCheapest$134Average$339FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$198Average$407FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$242Average$442FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$266Average$396FlexibilityNo cancel feeOn-time63%

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