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St. Louis

$65+ 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 8/3. Fares are subject to change and may not be available on all flights or dates of travel.
PHX — STL
Jun 20 — Jun 271
Sat 6/20
Sat 6/27
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 May 21, 2026.

This deal was found by Cheapflights users on 5/18. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/268:45 am
LAS
-
STL
Nonstop3h 21m
Frontier
Sun 6/282:56 pm
STL
-
LAS
Nonstop3h 35m
Frontier
Deal found 5/18$177
This Frontier deal was found by Cheapflights users on 5/20. 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.
Tue 8/1112:40 pm
LAS
-
STL
Nonstop3h 25m
Frontier
Sat 8/152:52 pm
STL
-
LAS
Nonstop3h 36m
Frontier
Deal found 5/20$190
This Super.com deal was found by Cheapflights users on 5/18. 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.
Thu 8/272:10 pm
LAS
-
STL
Nonstop3h 26m
Frontier
Sun 8/308:21 pm
STL
-
LAS
Nonstop3h 38m
Frontier
Deal found 5/18$207
This Kiwi.com deal was found by Cheapflights users on 5/19. 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 7/229:15 am
LAS
-
STL
1 stop12h 44m
Frontier
Tue 8/47:03 pm
STL
-
LAS
Nonstop3h 33m
Frontier
Deal found 5/19$212
This Kiwi.com deal was found by Cheapflights users on 5/21. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/272:10 pm
LAS
-
STL
Nonstop3h 26m
Frontier
Sat 8/298:21 pm
STL
-
LAS
Nonstop3h 38m
Frontier
Deal found 5/21$213
This Frontier deal was found by Cheapflights users on 5/17. 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.
Tue 8/1812:40 pm
LAS
-
STL
Nonstop3h 28m
Frontier
Wed 8/193:33 pm
STL
-
LAS
1 stop10h 21m
Frontier
Deal found 5/17$215
This Kiwi.com deal was found by Cheapflights users on 5/18. 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 6/812:59 am
LAS
-
STL
1 stop16h 24m
Frontier
Tue 6/167:03 pm
STL
-
LAS
1 stop7h 01m
Frontier
Deal found 5/18$223
This Cheapflightsfares deal was found by Cheapflights users on 5/17. 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 7/38:45 am
LAS
-
STL
Nonstop3h 21m
Frontier
Mon 7/62:52 pm
STL
-
LAS
Nonstop3h 36m
Frontier
Deal found 5/17$227
This Kiwi.com deal was found by Cheapflights users on 5/17. 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 8/411:19 am
PHX
-
STL
1 stop6h 04m
Frontier
Tue 8/117:03 pm
STL
-
PHX
1 stop5h 54m
Frontier
Deal found 5/17$229
This Frontier deal was found by Cheapflights users on 5/18. 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 7/48:45 am
LAS
-
STL
Nonstop3h 21m
Frontier
Mon 7/62:52 pm
STL
-
LAS
Nonstop3h 36m
Frontier
Deal found 5/18$229
This Expedia deal was found by Cheapflights users on 5/16. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/1710:32 pm
PHX
-
STL
1 stop13h 34m
Frontier
Tue 6/237:03 pm
STL
-
PHX
1 stop6h 01m
Frontier
Deal found 5/16$230
This Mytrip deal was found by Cheapflights users on 5/16. 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.
Tue 6/3010:32 pm
PHX
-
STL
1 stop18h 19m
Frontier
Tue 7/78:08 pm
STL
-
PHX
1 stop21h 35m
Frontier
Deal found 5/16$239

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 May 21, 2026.

Round-trip from

$177

One-way from

$65
(Kiwi.com)

Popular in

March

Cheapest in

October

Average price

$392

Good round-trip deal

$395 or less

Good one-way deal

$226 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. 8% potential increase in price ($35 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 2026
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 May 21, 2026.
Use the filters below to find and compare flights from Arizona to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PhoenixSt. Louis

PHX - STL

PHXSTL

Phoenix Sky Harbor Intl

Thu 7/2

10:32 pm-2:06 pm

1 stop13h 34m

Lambert-St Louis

Sun 7/5

2:52 pm-11:27 am

1 stop22h 35m

$279

PhoenixSt. Louis

PHX - STL

PHXSTL

Phoenix Sky Harbor Intl

Wed 7/22

6:35 pm-11:30 pm

Nonstop2h 55m

Lambert-St Louis

Mon 7/27

9:45 pm-10:55 pm

Nonstop3h 10m

$314

PhoenixSt. Louis

PHX - STL

PHXSTL

Phoenix Sky Harbor Intl

Fri 6/5

8:55 pm-1:50 am

Nonstop2h 55m

Lambert-St Louis

Sun 6/7

7:35 pm-11:05 pm

1 stop5h 30m

$361

TucsonSt. Louis

TUS - STL

TUSSTL

Tucson

Thu 10/15

5:35 am-3:10 pm

1 stop7h 35m

Lambert-St Louis

Tue 10/20

5:45 am-12:20 pm

2 stops8h 35m

$389
Quickest round-trip

PhoenixSt. Louis

PHX - STL

PHXSTL

Phoenix Sky Harbor Intl

Wed 7/15

5:00 am-9:50 am

Nonstop2h 50m

Lambert-St Louis

Sun 7/19

9:45 pm-10:55 pm

Nonstop3h 10m

$393

PhoenixSt. Louis

PHX - STL

PHXSTL

Phoenix Sky Harbor Intl

Sat 8/15

6:10 am-11:05 am

Nonstop2h 55m

Lambert-St Louis

Mon 8/17

2:20 pm-4:50 pm

1 stop4h 30m

$402

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Tue 8/11

12:34 pm-11:38 pm

1 stop9h 04m

Lambert-St Louis

Sat 8/15

1:36 pm-8:04 pm

2 stops8h 28m

$404

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Tue 8/18

7:45 am-6:04 pm

1 stop8h 19m

Lambert-St Louis

Wed 8/19

1:36 pm-8:04 pm

2 stops8h 28m

$404

TucsonSt. Louis

TUS - STL

TUSSTL

Tucson

Thu 9/10

12:40 pm-11:37 pm

1 stop8h 57m

Lambert-St Louis

Mon 9/14

3:42 pm-9:37 pm

1 stop7h 55m

$405

TucsonSt. Louis

TUS - STL

TUSSTL

Tucson

Wed 6/10

3:54 pm-11:59 pm

1 stop6h 05m

Lambert-St Louis

Sat 6/13

7:01 am-12:30 pm

1 stop7h 29m

$415

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/21

Showing 1-10 of 59 resultsSorted by cheapest first
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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, February is the cheapest month in which you can book a flight from Arizona to St. Louis (average of $78). Flying from Arizona to St. Louis in April is currently the most expensive (average of $190). 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 May 21, 2026.

It’s optimal to fly from Arizona to St. Louis at noon. By choosing this option you can save up to 15% on the cost of your flight, compared to a flight in the evening.

How much does it cost to fly round-trip from Arizona to St. Louis?

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

The price you pay for your flight from Arizona to St. Louis may vary depending on when you book. For the best chance of a lower fare, look to book 24 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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 May 16, 2026.

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 2h 55m. Frontier provides one of the quickest options available for as low as $314. 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 $70 on Frontier. Other airlines that offer cheap prices include United Airlines from $128 and American Airlines 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 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 Envoy Air (93%), American Airlines (85%) and Alaska Airlines (85%).

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

    While on average a flight from Arizona to St. Louis is generally $351, our data shows the cheapest flight currently is $187. When looking at the most popular route, (Phoenix Sky Harbor Intl - Lambert-St Louis), you can expect to pay $274 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, February is the cheapest month in which you can book a flight from Arizona to St. Louis (average of $78). Flying from Arizona to St. Louis in April is currently the most expensive (average of $190). 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
Fenton
Swansea
Fairview Heights
Maryland Heights
Collinsville
Eureka
Wentzville
Glencoe
Chesterfield
Alton
Farmington
Festus

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Arizona to St. Louis

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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 May 21, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$99Average$212FlexibilityNo cancel feeOn-time62%
DeltaCheapest$134Average$371FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$214Average$444FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$256Average$406FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$257Average$431FlexibilityNo cancel feeOn-time63%

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