HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
St. Louis

$81+ 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 10/29. Fares are subject to change and may not be available on all flights or dates of travel.
PHX — STL
Aug 5 — Aug 121
Tue 8/5
Tue 8/12
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Arizona to St. Louis with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 July 31, 2025.

Round-trip from

$147
(Cheapflightsfares)

One-way from

$81
(Southwest)

Popular in

January

Cheapest in

September

Average price

$373

Good round-trip deal

$324 or less

Good one-way deal

$198 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. 9% potential increase in price ($38 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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

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 July 31, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 7/29. 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 10/108:09 amLAS - STL
Nonstop3h 25mFrontier
Mon 10/139:25 pmSTL - LAS
Nonstop3h 38mFrontier
Deal found 7/29$147
This CheapOair deal was found by Cheapflights users on 7/29. 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.
Thu 8/2810:43 pmLAS - STL
1 stop12h 49mSpirit Airlines
Thu 9/412:05 pmSTL - LAS
1 stop11h 04mSpirit Airlines
Deal found 7/29$164
This CheapOair deal was found by Cheapflights users on 7/29. 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.
Thu 8/1410:43 pmLAS - STL
1 stop12h 49mMultiple Airlines
Mon 8/182:37 pmSTL - LAS
Nonstop3h 36mMultiple Airlines
Deal found 7/29$191
This CheapOair deal was found by Cheapflights users on 7/29. 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.
Thu 8/2110:42 pmPHX - STL
1 stop12h 50mSpirit Airlines
Mon 8/252:30 pmSTL - PHX
1 stop9h 07mSpirit Airlines
Deal found 7/29$237
This FlightHub deal was found by Cheapflights users on 7/29. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/128:15 amPHX - STL
1 stop10h 25mMultiple Airlines
Sun 9/1412:05 pmSTL - PHX
1 stop11h 59mMultiple Airlines
Deal found 7/29$241
This Delta deal was found by Cheapflights users on 7/31. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/235:15 pmPHX - STL
1 stop5h 09mDelta
Sat 10/256:00 amSTL - PHX
1 stop6h 40mDelta
Deal found 7/31$244
This Sun Country Air deal was found by Cheapflights users on 7/31. 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 Sun Country Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/186:02 pmPHX - STL
1 stop15h 25mSun Country Air
Sun 9/217:34 amSTL - PHX
1 stop27h 18mSun Country Air
Deal found 7/31$245
This American Airlines deal was found by Cheapflights users on 7/31. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2812:25 pmPHX - STL
Nonstop3h 05mAmerican Airlines
Thu 9/48:00 amSTL - PHX
Nonstop3h 29mAmerican Airlines
Deal found 7/31$246
This FlightHub deal was found by Cheapflights users on 7/31. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1111:35 amTUS - STL
1 stop19h 31mFrontier
Sun 9/142:38 pmSTL - TUS
1 stop25h 13mFrontier
Deal found 7/31$255
This Southwest deal was found by Cheapflights users on 7/29. 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.
Thu 9/186:30 pmPHX - STL
Nonstop2h 55mSouthwest
Tue 9/2310:25 amSTL - PHX
1 stop6h 25mSouthwest
Deal found 7/29$256
This Trip.com deal was found by Cheapflights users on 7/31. 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.
Tue 10/712:09 pmPHX - STL
1 stop18h 58mFrontier
Fri 10/102:54 pmSTL - PHX
Nonstop3h 22mFrontier
Deal found 7/31$263
This Delta deal was found by Cheapflights users on 7/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/312:54 pmTUS - STL
1 stop7h 08mDelta
Sat 9/136:01 amSTL - TUS
1 stop7h 46mDelta
Deal found 7/29$267

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 July 31, 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 10/10

8:09 am-1:34 pm

Nonstop3h 25m

Lambert-St Louis

Mon 10/13

9:25 pm-11:03 pm

Nonstop3h 38m

$147

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Thu 8/28

10:43 pm-1:32 pm

1 stop12h 49m

Lambert-St Louis

Thu 9/4

12:05 pm-9:09 pm

1 stop11h 04m

$164

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Thu 8/14

10:43 pm-1:32 pm

1 stop12h 49m

Lambert-St Louis

Mon 8/18

2:37 pm-4:13 pm

Nonstop3h 36m

$191

PhoenixSt. Louis

PHX - STL

PHXSTL

Phoenix Sky Harbor Intl

Thu 8/21

10:42 pm-1:32 pm

1 stop12h 50m

Lambert-St Louis

Mon 8/25

2:30 pm-9:37 pm

1 stop9h 07m

$237

PhoenixSt. Louis

PHX - STL

PHXSTL

Phoenix Sky Harbor Intl

Fri 9/12

8:15 am-8:40 pm

1 stop10h 25m

Lambert-St Louis

Sun 9/14

12:05 pm-10:04 pm

1 stop11h 59m

$241

PhoenixSt. Louis

PHX - STL

PHXSTL

Phoenix Sky Harbor Intl

Thu 10/23

5:15 pm-12:24 am

1 stop5h 09m

Lambert-St Louis

Sat 10/25

6:00 am-10:40 am

1 stop6h 40m

$244

PhoenixSt. Louis

PHX - STL

PHXSTL

Phoenix Sky Harbor Intl

Thu 9/18

6:02 pm-11:27 am

1 stop15h 25m

Lambert-St Louis

Sun 9/21

7:34 am-8:52 am

1 stop27h 18m

$245

PhoenixSt. Louis

PHX - STL

PHXSTL

Phoenix Sky Harbor Intl

Thu 8/28

12:25 pm-5:30 pm

Nonstop3h 05m

Lambert-St Louis

Thu 9/4

8:00 am-9:29 am

Nonstop3h 29m

$246

TucsonSt. Louis

TUS - STL

TUSSTL

Tucson

Thu 9/11

11:35 am-9:06 am

1 stop19h 31m

Lambert-St Louis

Sun 9/14

2:38 pm-1:51 pm

1 stop25h 13m

$255

PhoenixSt. Louis

PHX - STL

PHXSTL

Phoenix Sky Harbor Intl

Thu 9/18

6:30 pm-11:25 pm

Nonstop2h 55m

Lambert-St Louis

Tue 9/23

10:25 am-2:50 pm

1 stop6h 25m

$256

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/31

Showing 1-10 of 41 results
1
2
3
...
5

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, August is the cheapest month in which you can book a flight from Arizona to St. Louis (average of $311). Flying from Arizona to St. Louis in March is currently the most expensive (average of $356). 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 July 31, 2025.

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

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

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. 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 St. Louis. Reviews last updated July 31, 2025.
Peruse reviews from past customers who have flown with Alaska Airlines, Southwest, and Delta from Arizona to St. Louis to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Crew

8.5

Boarding

8.1

Entertainment

7.1

Comfort

7.8

Food

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Crew

8.5

Boarding

8.1

Entertainment

7.1

Comfort

7.8

Food

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Southwest
8.0
Very good
4,246 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Crew

8.5

Boarding

8.1

Entertainment

7.1

Comfort

7.8

Food

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Delta
8.0
Very good
7,981 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Crew

8.5

Boarding

8.1

Entertainment

7.1

Comfort

7.8

Food

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
United Airlines
7.4
Good
8,900 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Crew

8.5

Boarding

8.1

Entertainment

7.1

Comfort

7.8

Food

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Crew

8.5

Boarding

8.1

Entertainment

7.1

Comfort

7.8

Food

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.

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.

  • 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 $81 on Southwest. Other airlines that offer cheap prices include Frontier from $93 and Spirit Airlines from $95 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 (93%), Alaska Airlines (90%) and American Airlines (89%).

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

    While on average a flight from Arizona to St. Louis is generally $310, our data shows the cheapest flight currently is $123. When looking at the most popular route, (Phoenix Sky Harbor Intl - Lambert-St Louis), you can expect to pay $175 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, August is the cheapest month in which you can book a flight from Arizona to St. Louis (average of $311). Flying from Arizona to St. Louis in March is currently the most expensive (average of $356). 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
O'Fallon
Maryland Heights
Fairview Heights
Collinsville
Eureka
St. Peters
Glencoe
Alton
Chesterfield
Festus
Farmington

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Arizona to St. Louis

See prices for flight routes from nearby airports that may be better suited for you.
Newark to Kansas City flights
LaGuardia to Kansas City flights
John F Kennedy Intl to Kansas City flights
Newark to St. Louis flights
LaGuardia to St. Louis flights
Denver to Kansas City flights
O'Hare Intl to Kansas City flights
Seattle to St. Louis flights
John F Kennedy Intl to St. Louis flights
Denver to St. Louis flights
Boston to Kansas City flights
Dulles Intl to Kansas City flights
Dulles Intl to St. Louis flights
Dallas/Fort Worth to St. Louis flights
Boston to St. Louis flights
Los Angeles to Kansas City flights
San Francisco to St. Louis flights
Dallas/Fort Worth to Kansas City flights
Hobby to St. Louis flights
Atlanta to St. Louis flights
Denver to Springfield flights
Baltimore to St. Louis flights
Los Angeles to St. Louis flights
Philadelphia to Kansas City flights
Baltimore to Kansas City flights
Reagan-National to St. Louis flights
Seattle to Kansas City flights
George Bush Intcntl to St. Louis flights
Philadelphia to St. Louis flights
Detroit to Kansas City flights
O'Hare Intl to St. Louis flights
Hobby to Kansas City flights
Minneapolis to St. Louis flights
Atlanta to Kansas City flights
Miami to St. Louis flights
Orlando to St. Louis flights
Tampa to Kansas City flights
Reagan-National to Kansas City flights
Ontario to Kansas City flights
Salt Lake City to Kansas City flights
San Francisco to Kansas City flights
Minneapolis to Kansas City flights
George Bush Intcntl to Kansas City flights
San Francisco to Springfield flights
Ontario to St. Louis flights
Baltimore to Springfield flights
Charlotte to St. Louis flights
Orlando to Kansas City flights
Sky Harbor Intl to St. Louis flights
Sky Harbor Intl to Kansas City flights

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 July 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$116Average$220FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$207Average$456FlexibilityNo cancel feeOn-time71%
DeltaCheapest$223Average$336FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$263Average$420FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$299Average$400FlexibilityNo cancel feeOn-time63%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.