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Mesa

$89+ 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 5/10. Fares are subject to change and may not be available on all flights or dates of travel.
STL — PHX
May 5 — May 121
Mon 5/5
Mon 5/12
1 adult, Economy
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Cheapflights Tip: The best prices from Lambert-St Louis to Mesa are usually found in July or June, booked 14 days in advance, depart on a Wednesday or Saturday and return on a Wednesday

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 April 30, 2025.

Round-trip from

$299
(Booking.com)

One-way from

$89
(Frontier)

Popular in

March

Cheapest in

July

Average price

$384
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. 19% potential increase in price ($83 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($13 potential savings vs. average RT price).
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Average for round-trip flights in April 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 April 30, 2025.

This Booking.com deal was found by Cheapflights users on 4/28. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/222:25 pmSTL - PHX
1 stop8h 49mFrontier
Mon 5/2612:50 pmPHX - STL
1 stop23h 05mFrontier
Deal found 4/28$299
This Southwest deal was found by Cheapflights users on 4/28. 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.
Tue 5/279:55 amSTL - PHX
1 stop6h 15mSouthwest
Tue 6/107:25 pmPHX - STL
Nonstop2h 55mSouthwest
Deal found 4/28$301
This American Airlines deal was found by Cheapflights users on 4/28. 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 5/158:05 amSTL - PHX
Nonstop3h 20mAmerican Airlines
Fri 5/237:01 pmPHX - STL
Nonstop2h 57mAmerican Airlines
Deal found 4/28$303
This Delta deal was found by Cheapflights users on 4/28. 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 5/217:19 pmSTL - PHX
1 stop6h 30mDelta
Sat 5/2412:45 amPHX - STL
1 stop8h 07mDelta
Deal found 4/28$311
This Mytrip deal was found by Cheapflights users on 4/28. 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.
Sun 6/156:12 pmSTL - PHX
1 stop27h 53mSpirit Airlines
Wed 6/189:35 pmPHX - STL
1 stop17h 29mSpirit Airlines
Deal found 4/28$312
This Mytrip deal was found by Cheapflights users on 4/28. 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.
Sun 6/156:12 pmSTL - PHX
2 stops17h 20mMultiple Airlines
Wed 6/189:35 pmPHX - STL
1 stop17h 29mMultiple Airlines
Deal found 4/28$335
This United Airlines deal was found by Cheapflights users on 4/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/164:40 pmSTL - PHX
1 stop5h 37mUnited Airlines
Sat 9/206:00 amPHX - STL
2 stops7h 44mUnited Airlines
Deal found 4/28$340
This Alaska Airlines deal was found by Cheapflights users on 4/28. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/172:55 pmSTL - PHX
1 stop20h 01mAlaska Airlines
Mon 10/205:00 amPHX - STL
1 stop16h 56mAlaska Airlines
Deal found 4/28$425
This Sun Country Air deal was found by Cheapflights users on 4/28. 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.
Sun 5/48:00 amSTL - PHX
1 stop28h 25mSun Country Air
Sat 5/109:55 amPHX - STL
1 stop8h 45mSun Country Air
Deal found 4/28$430

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 April 30, 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

Thu 5/22

2:25 pm-9:14 pm

1 stop8h 49m

Phoenix Sky Harbor Intl

Mon 5/26

12:50 pm-1:55 pm

1 stop23h 05m

$299

St. LouisPhoenix

STL - PHX

STLPHX

Lambert-St Louis

Tue 5/27

9:55 am-2:10 pm

1 stop6h 15m

Phoenix Sky Harbor Intl

Tue 6/10

7:25 pm-12:20 am

Nonstop2h 55m

$301

St. LouisPhoenix

STL - PHX

STLPHX

Lambert-St Louis

Thu 5/15

8:05 am-9:25 am

Nonstop3h 20m

Phoenix Sky Harbor Intl

Fri 5/23

7:01 pm-11:58 pm

Nonstop2h 57m

$303

St. LouisPhoenix

STL - PHX

STLPHX

Lambert-St Louis

Wed 5/21

7:19 pm-11:49 pm

1 stop6h 30m

Phoenix Sky Harbor Intl

Sat 5/24

12:45 am-10:52 am

1 stop8h 07m

$311

St. LouisPhoenix

STL - PHX

STLPHX

Lambert-St Louis

Sun 6/15

6:12 pm-8:05 pm

1 stop27h 53m

Phoenix Sky Harbor Intl

Wed 6/18

9:35 pm-5:04 pm

1 stop17h 29m

$312

St. LouisPhoenix

STL - PHX

STLPHX

Lambert-St Louis

Sun 6/15

6:12 pm-9:32 am

2 stops17h 20m

Phoenix Sky Harbor Intl

Wed 6/18

9:35 pm-5:04 pm

1 stop17h 29m

$335

St. LouisPhoenix

STL - PHX

STLPHX

Lambert-St Louis

Tue 5/27

5:20 am-8:53 am

1 stop5h 33m

Phoenix Sky Harbor Intl

Tue 6/10

6:00 am-3:30 pm

2 stops7h 30m

$344

St. LouisPhoenix

STL - PHX

STLPHX

Lambert-St Louis

Sun 5/4

8:00 am-10:25 am

1 stop28h 25m

Phoenix Sky Harbor Intl

Sat 5/10

9:55 am-8:40 pm

1 stop8h 45m

$430

St. LouisPhoenix

STL - PHX

STLPHX

Lambert-St Louis

Thu 5/29

6:22 pm-9:36 am

2 stops17h 14m

Phoenix Sky Harbor Intl

Wed 6/4

7:00 am-12:04 am

2 stops15h 04m

$534

St. LouisPhoenix

STL - PHX

STLPHX

Lambert-St Louis

Sat 5/10

8:15 pm-11:55 pm

1 stop5h 40m

$89

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

Showing 1-10 of 18 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 April 25, 2025.

To ensure you get the cheapest price possible for a flight from St. Louis to Mesa, you should look to book at least 14 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 April 30, 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 evenings 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.

Rainfall in Mesa by month

Plan your trip to Mesa by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Mesa ranges from 0.0 - 1.1 inches per month. July is typically the wettest month, when rainfall can reach 1.1 in. June is typically the driest time to visit Mesa when rainfall is around 0.0 in.

Temperature in Mesa by month

Plan your trip to Mesa by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Mesa, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 95.0 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 55.4 F).

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 April 30, 2025.
Get a feel of what it's like to fly with Alaska Airlines, Southwest and Delta from St. Louis to Mesa by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,961 reviews

Boarding

8.2

Crew

8.5

Entertainment

7.1

Overall

8.0

Food

7.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
9,961 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Boarding

8.2

Crew

8.5

Entertainment

7.1

Overall

8.0

Food

7.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,295 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Boarding

8.2

Crew

8.5

Entertainment

7.1

Overall

8.0

Food

7.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,929 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Boarding

8.2

Crew

8.5

Entertainment

7.1

Overall

8.0

Food

7.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,696 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Boarding

8.2

Crew

8.5

Entertainment

7.1

Overall

8.0

Food

7.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Boarding

8.2

Crew

8.5

Entertainment

7.1

Overall

8.0

Food

7.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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 5 daily outbound flights to Mesa from 5 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 $89. Users have also found prices from $123 and $132 on Sun Country Air 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 (88%), Southwest (82%), American Airlines (71%).

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

    The cheapest flight price from St. Louis to Mesa is $153. On average you can expect to pay $611. The most popular route, (Lambert-St Louis - Phoenix Sky Harbor Intl), can usually be booked for $235.

  • 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

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Top 5 airlines flying from St. Louis to Mesa

Discover the top 5 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 April 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$78Average$149FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$131Average$350FlexibilityNo cancel feeOn-time71%
DeltaCheapest$215Average$283FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$218Average$346FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$297Average$448FlexibilityNo cancel feeOn-time63%

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