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$55+ 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 2/22. Fares are subject to change and may not be available on all flights or dates of travel.
STL — PHX
Jan 26 — Feb 21
Sun 1/26
Sun 2/2
1 adult, Economy
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The best prices from Lambert-St Louis to Mesa are usually found in May or July, booked 83 days in advance, depart on a Wednesday or Saturday and return on a Wednesday

Cheap flight deals from St. Louis to Mesa

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Mesa (MS9). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 21, 2025.

Round-trip from

$286
(Mytrip)

One-way from

$55
(Frontier)

Popular in

March

Cheapest in

May

Average price

$355
From Lambert-St Louis to Mesa
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One-way flight from Lambert-St Louis to Mesa
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Highest demand for flights based on searches. 18% potential increase in price ($70 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($11 potential savings vs. average RT price).
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Average for round-trip flights in January 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 January 21, 2025.

This Mytrip deal was found by Cheapflights users on 1/20. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/184:00 pmSTL - PHX
3 stops22h 50mSpirit Airlines
Mon 2/247:35 pmPHX - STL
2 stops18h 07mSpirit Airlines
Deal found 1/20$286
This Trip.com deal was found by Cheapflights users on 1/20. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/177:04 pmSTL - PHX
1 stop6h 55mFrontier
Sun 2/2312:01 amPHX - STL
1 stop22h 42mFrontier
Deal found 1/20$288
This Mytrip deal was found by Cheapflights users on 1/20. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/2112:15 pmSTL - PHX
3 stops24h 25mMultiple Airlines
Mon 2/247:35 pmPHX - STL
2 stops18h 07mMultiple Airlines
Deal found 1/20$291
This Delta deal was found by Cheapflights users on 1/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/47:40 amSTL - PHX
1 stop6h 44mDelta
Wed 3/196:00 amPHX - STL
1 stop5h 23mDelta
Deal found 1/20$343
This American Airlines deal was found by Cheapflights users on 1/20. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/157:15 amSTL - PHX
Nonstop3h 44mAmerican Airlines
Tue 2/187:52 pmPHX - STL
Nonstop2h 47mAmerican Airlines
Deal found 1/20$359
This Alaska Airlines deal was found by Cheapflights users on 1/21. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/257:00 amSTL - PHX
1 stop17h 59mAlaska Airlines
Thu 3/69:00 amPHX - STL
2 stops13h 59mAlaska Airlines
Deal found 1/21$363
This Southwest deal was found by Cheapflights users on 1/20. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/208:25 pmSTL - PHX
Nonstop3h 35mSouthwest
Wed 2/2611:40 amPHX - STL
1 stop5h 45mSouthwest
Deal found 1/20$369
This United Airlines deal was found by Cheapflights users on 1/19. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/188:20 amSTL - PHX
1 stop13h 46mUnited Airlines
Tue 2/255:39 pmPHX - STL
2 stops19h 57mUnited Airlines
Deal found 1/19$398

Find flights from St. Louis to Mesa within your budget

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 January 21, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

St. LouisPhoenix

STL - PHX

STLPHX

Lambert-St Louis

Tue 2/18

4:00 pm-1:50 pm

3 stops22h 50m

Phoenix Sky Harbor Intl

Mon 2/24

7:35 pm-2:42 pm

2 stops18h 07m

$286

St. LouisPhoenix

STL - PHX

STLPHX

Lambert-St Louis

Mon 2/17

7:04 pm-12:59 am

1 stop6h 55m

Phoenix Sky Harbor Intl

Sun 2/23

12:01 am-11:43 pm

1 stop22h 42m

$288

St. LouisPhoenix

STL - PHX

STLPHX

Lambert-St Louis

Fri 2/21

12:15 pm-11:40 am

3 stops24h 25m

Phoenix Sky Harbor Intl

Mon 2/24

7:35 pm-2:42 pm

2 stops18h 07m

$291

St. LouisPhoenix

STL - PHX

STLPHX

Lambert-St Louis

Tue 3/4

7:40 am-1:24 pm

1 stop6h 44m

Phoenix Sky Harbor Intl

Wed 3/19

6:00 am-1:23 pm

1 stop5h 23m

$343

St. LouisPhoenix

STL - PHX

STLPHX

Lambert-St Louis

Sat 2/15

7:15 am-9:59 am

Nonstop3h 44m

Phoenix Sky Harbor Intl

Tue 2/18

7:52 pm-11:39 pm

Nonstop2h 47m

$359

St. LouisPhoenix

STL - PHX

STLPHX

Lambert-St Louis

Tue 2/25

7:00 am-11:59 pm

1 stop17h 59m

Phoenix Sky Harbor Intl

Thu 3/6

9:00 am-11:59 pm

2 stops13h 59m

$363

St. LouisPhoenix

STL - PHX

STLPHX

Lambert-St Louis

Thu 2/20

8:25 pm-11:00 pm

Nonstop3h 35m

Phoenix Sky Harbor Intl

Wed 2/26

11:40 am-6:25 pm

1 stop5h 45m

$369

St. LouisPhoenix

STL - PHX

STLPHX

Lambert-St Louis

Tue 2/18

8:20 am-9:06 pm

1 stop13h 46m

Phoenix Sky Harbor Intl

Tue 2/25

5:39 pm-2:36 pm

2 stops19h 57m

$398

St. LouisPhoenix

STL - PHX

STLPHX

Lambert-St Louis

Sat 2/22

7:04 pm-12:59 am

1 stop6h 55m

$55

St. LouisPhoenix

STL - PHX

STLPHX

Lambert-St Louis

Tue 3/4

4:00 pm-5:57 pm

2 stops26h 57m

$139

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/20

Showing 1-10 of 16 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.

Travel insights for flights from St. Louis to Mesa

Get recent, data-driven insights about flights from St. Louis to Mesa including ideal travel times, pricing trends, and more.

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 January 17, 2025.

To ensure you get the cheapest price possible for a flight from St. Louis to Mesa, you should look to book at least 83 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 January 21, 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.

Weekly flight availability from St. Louis to Mesa

Explore weekly flight availability from St. Louis to Mesa. 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 January 21, 2025.

The most flights from STL to MS9 are scheduled on a Monday (18 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (5 on average).

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 January 21, 2025.
Get a feel of what it's like to fly with Frontier, Southwest and United Airlines 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.
Southwest
8.1
Very good
4,662 reviews

Boarding

8.2

Food

7.2

Comfort

8.1

Entertainment

7.7

Overall

8.1

Crew

8.7

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Southwest
8.1
Very good
4,662 reviews
Southwest
8.1
Very good
4,662 reviews

Boarding

8.2

Food

7.2

Comfort

8.1

Entertainment

7.7

Overall

8.1

Crew

8.7

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Alaska Airlines
8.0
Very good
9,706 reviews
Southwest
8.1
Very good
4,662 reviews

Boarding

8.2

Food

7.2

Comfort

8.1

Entertainment

7.7

Overall

8.1

Crew

8.7

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Delta
8.0
Very good
8,521 reviews
Southwest
8.1
Very good
4,662 reviews

Boarding

8.2

Food

7.2

Comfort

8.1

Entertainment

7.7

Overall

8.1

Crew

8.7

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

United Airlines
7.4
Good
8,985 reviews
Southwest
8.1
Very good
4,662 reviews

Boarding

8.2

Food

7.2

Comfort

8.1

Entertainment

7.7

Overall

8.1

Crew

8.7

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
4,662 reviews

Boarding

8.2

Food

7.2

Comfort

8.1

Entertainment

7.7

Overall

8.1

Crew

8.7

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

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 11 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 $55. Users have also found prices from $139 and $171 on Spirit Airlines and Alaska 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 (83%), Southwest (80%), Alaska Airlines (79%).

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

    The cheapest flight price from St. Louis to Mesa is $113. On average you can expect to pay $393. The most popular route, (Lambert-St Louis - Phoenix Sky Harbor Intl), can usually be booked for $224.

  • 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.

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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 January 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$78Average$150FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$145Average$369FlexibilityNo cancel feeOn-time71%
DeltaCheapest$215Average$287FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$226Average$475FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$276Average$439FlexibilityNo cancel feeOn-time63%
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