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Mesa

$56+ Cheap flights from St. Louis (STL) to Mesa, AZ

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 8/13. Fares are subject to change and may not be available on all flights or dates of travel.
STL — PHX
jul. 8 — jul. 151
mar. 7/8
mar. 7/15
1 adult, Economy
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Cheapflights Tip: The best prices from Lambert-St Louis to Mesa are usually found in August or July, booked 76 days in advance, depart on a Wednesday or Tuesday and return on a Tuesday

Cheap flight deals from St. Louis to Mesa

Keep the following information in mind while searching for St. Louis to Mesa flight deals. Data was last updated julio 3, 2025.

Round-trip from

$222
(FlightHub)

One-way from

$56
(Priceline)

Popular in

March

Cheapest in

August

Average price

$284
From Lambert-St Louis to Mesa
Search Deals
One-way flight from Lambert-St Louis to Mesa
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Highest demand for flights based on searches. 14% potential increase in price ($61 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($11 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Find flight deals from St. Louis to Mesa

Cheapest flights from St. Louis to Mesa
Explore the most affordable flight options available from St. Louis to Mesa. Find the lowest fares from popular airlines and budget airlines, with prices last updated on julio 3, 2025.

This FlightHub deal was found by Cheapflights users on 7/2. 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.
sáb. 9/207:55 pmSTL - PHX
1 stop13h 37mFrontier
dom. 9/286:18 pmPHX - STL
1 stop12h 48mFrontier
Deal found 7/2$222
This FlightHub deal was found by Cheapflights users on 7/1. 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.
jue. 8/282:30 pmSTL - PHX
1 stop9h 07mMultiple Airlines
lun. 9/19:19 pmPHX - STL
1 stop9h 52mMultiple Airlines
Deal found 7/1$224
This FlightHub deal was found by Cheapflights users on 7/2. 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.
vie. 7/2510:47 amSTL - PHX
1 stop13h 47mSpirit Airlines
dom. 7/2711:49 pmPHX - STL
1 stop8h 03mSpirit Airlines
Deal found 7/2$233
This American Airlines deal was found by Cheapflights users on 7/2. 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.
mar. 8/267:53 amSTL - PHX
Nonstop3h 15mAmerican Airlines
jue. 9/412:59 pmPHX - STL
Nonstop3h 01mAmerican Airlines
Deal found 7/2$257
This Southwest deal was found by Cheapflights users on 7/2. 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.
mié. 9/106:15 amSTL - PHX
Nonstop3h 15mSouthwest
mié. 9/1710:05 amPHX - STL
1 stop5h 45mSouthwest
Deal found 7/2$267
This Delta deal was found by Cheapflights users on 7/2. 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.
mar. 11/47:30 amSTL - PHX
1 stop6h 39mDelta
mié. 11/1212:59 amPHX - STL
1 stop6h 45mDelta
Deal found 7/2$277

Cheapflights Fare Finder

Customize your flight search to find flights from St. Louis to Mesa 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 julio 3, 2025.
Use the filters below to find and compare flights from St. Louis to Mesa that are best for you.

Fly from

St. Louis

Fly to

Mesa

Route

Depart

Return

Price

St. LouisPhoenix

STL - PHX

STLPHX

Lambert-St Louis

sáb. 9/20

7:55 pm-7:32 am

1 stop13h 37m

Phoenix Sky Harbor Intl

dom. 9/28

6:18 pm-9:06 am

1 stop12h 48m

$222

St. LouisPhoenix

STL - PHX

STLPHX

Lambert-St Louis

jue. 8/28

2:30 pm-9:37 pm

1 stop9h 07m

Phoenix Sky Harbor Intl

lun. 9/1

9:19 pm-9:11 am

1 stop9h 52m

$224

St. LouisPhoenix

STL - PHX

STLPHX

Lambert-St Louis

vie. 7/25

10:47 am-10:34 pm

1 stop13h 47m

Phoenix Sky Harbor Intl

dom. 7/27

11:49 pm-9:52 am

1 stop8h 03m

$233

St. LouisPhoenix

STL - PHX

STLPHX

Lambert-St Louis

mar. 8/26

7:53 am-9:08 am

Nonstop3h 15m

Phoenix Sky Harbor Intl

jue. 9/4

12:59 pm-6:00 pm

Nonstop3h 01m

$257

St. LouisPhoenix

STL - PHX

STLPHX

Lambert-St Louis

mié. 9/10

6:15 am-7:30 am

Nonstop3h 15m

Phoenix Sky Harbor Intl

mié. 9/17

10:05 am-5:50 pm

1 stop5h 45m

$267

St. LouisPhoenix

STL - PHX

STLPHX

Lambert-St Louis

mar. 9/23

6:00 am-10:18 am

1 stop6h 18m

Phoenix Sky Harbor Intl

lun. 9/29

5:20 pm-12:38 am

1 stop5h 18m

$277

St. LouisPhoenix

STL - PHX

STLPHX

Lambert-St Louis

mié. 8/13

7:29 pm-10:44 pm

1 stop5h 15m

$56

St. LouisPhoenix

STL - PHX

STLPHX

Lambert-St Louis

vie. 8/15

2:30 pm-9:37 pm

1 stop9h 07m

$62

St. LouisPhoenix

STL - PHX

STLPHX

Lambert-St Louis

jue. 8/28

7:53 am-9:08 am

Nonstop3h 15m

$129

St. LouisPhoenix

STL - PHX

STLPHX

Lambert-St Louis

mar. 8/5

2:25 pm-6:50 pm

1 stop6h 25m

$138

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/2

Showing 1-10 of 12 results
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Best time to book a flight from St. Louis to Mesa

Have a flexible travel schedule? Discover the best time to fly to Mesa 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 Mesa

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

Use this chart to determine the optimal time to book a round-trip flight from St. Louis to Mesa. Price data was last updated on June 27, 2025.

To ensure you get the cheapest price possible for a flight from St. Louis to Mesa, you should look to book at least 76 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, January is the cheapest month in which you can book a flight from St. Louis to Mesa (average of $258). Flying from St. Louis to Mesa in March is currently the most expensive (average of $337). 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 MS9?

Find hourly flight availability from St. Louis to Mesa. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated julio 3, 2025.

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

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

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

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

Reviews of airlines servicing Mesa

Get insights into the airlines that provide service to Mesa. 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 Mesa. Reviews last updated julio 3, 2025.
Read through reviews of airlines operating flights from St. Louis to Mesa, such as Southwest, United Airlines, and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,266 reviews

Boarding

8.2

Entertainment

7.6

Comfort

8.0

Food

7.0

Overall

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Southwest
8.0
Very good
4,266 reviews
Southwest
8.0
Very good
4,266 reviews

Boarding

8.2

Entertainment

7.6

Comfort

8.0

Food

7.0

Overall

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
United Airlines
7.4
Good
8,861 reviews
Southwest
8.0
Very good
4,266 reviews

Boarding

8.2

Entertainment

7.6

Comfort

8.0

Food

7.0

Overall

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,266 reviews

Boarding

8.2

Entertainment

7.6

Comfort

8.0

Food

7.0

Overall

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Spirit Airlines
6.3
Okay
8,086 reviews
Southwest
8.0
Very good
4,266 reviews

Boarding

8.2

Entertainment

7.6

Comfort

8.0

Food

7.0

Overall

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Frontier
5.9
Fair
3,286 reviews
Southwest
8.0
Very good
4,266 reviews

Boarding

8.2

Entertainment

7.6

Comfort

8.0

Food

7.0

Overall

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Mesa. 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 Mesa?

    Located just 12.7 mi from the city center, Lambert-St Louis is the airport most travelers will use when flying to Mesa from St. Louis. Booking flights from Lambert-St Louis (STL) to Mesa should be relatively easy as there are 4 daily outbound flights to Mesa from 6 different airlines.

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

    For one-way options, check prices for Frontier. According to our data, you can fly for as low as $56. Users have also found prices from $62 and $129 on Spirit Airlines and American Airlines, respectively.

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

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from St. Louis to Mesa on time: SkyWest Airlines (84%), American Airlines (77%), Alaska Airlines (77%).

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

    The cheapest flight price from St. Louis to Mesa is $147. On average you can expect to pay $341. The most popular route, (Lambert-St Louis - Phoenix Sky Harbor Intl), can usually be booked for $142.

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

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

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

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

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

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

    Currently, January is the cheapest month in which you can book a flight from St. Louis to Mesa (average of $258). Flying from St. Louis to Mesa in March is currently the most expensive (average of $337). 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

Browse thousands of different options on Cheapflights for your next trip

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Top 6 airlines flying from St. Louis to Mesa

Discover the top 6 airlines that operate flights from St. Louis to Mesa. 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 julio 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$108Average$202FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$121Average$200FlexibilityNo cancel feeOn-time65%
American AirlinesCheapest$177Average$385FlexibilityNo cancel feeOn-time71%
DeltaCheapest$216Average$346FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$226Average$346FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$283Average$441FlexibilityNo cancel feeOn-time63%

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