$63+ 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 3/4. Fares are subject to change and may not be available on all flights or dates of travel.
Find cheap flights from St. Louis to Mesa 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.Cheapflights Tip: The best prices from Lambert-St Louis to Mesa are usually found in November or October, booked 87 days in advance, depart on a Wednesday or Tuesday and return on a Tuesday
Cheap flight deals from St. Louis to Mesa
Cheapest flights from St. Louis to MesaExplore 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 5, 2026.
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 5, 2026.
This Trip.com deal was found by Cheapflights users on 1/3. 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.
This Frontier deal was found by Cheapflights users on 1/5. 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.
This Frontier deal was found by Cheapflights users on 1/5. 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.
This CheapOair deal was found by Cheapflights users on 1/3. 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.
This Kiwi.com deal was found by Cheapflights users on 1/3. 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.
This Kiwi.com deal was found by Cheapflights users on 1/3. 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.
This Kiwi.com deal was found by Cheapflights users on 1/4. 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.
This Kiwi.com deal was found by Cheapflights users on 1/4. 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.
This Kiwi.com deal was found by Cheapflights users on 1/4. 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.
This Kiwi.com deal was found by Cheapflights users on 1/5. 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.
Find 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 January 5, 2026.
Round-trip from | $178 (Trip.com) |
|---|---|
One-way from | $63 (Trip.com) |
Popular in | March |
Cheapest in | November |
Average price | $359 |
Cheapflights Fare Finder
Use the filters below to find and compare flights from St. Louis to Mesa that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
St. LouisPhoenix
STL - PHX
STLPHX
Lambert-St Louis
Wed 3/25
9:55 am-11:30 am
Nonstop3h 35m
Phoenix Sky Harbor Intl
Tue 3/31
6:30 pm-11:20 pm
Nonstop2h 50m
St. LouisPhoenix
STL - PHX
STLPHX
Lambert-St Louis
Sat 2/21
5:25 pm-7:55 pm
Nonstop3h 30m
Phoenix Sky Harbor Intl
Sat 2/28
12:35 pm-6:00 pm
1 stop4h 25m
St. LouisPhoenix
STL - PHX
STLPHX
Lambert-St Louis
Mon 2/9
2:25 pm-6:40 pm
1 stop5h 15m
Phoenix Sky Harbor Intl
Wed 2/11
6:55 am-10:45 am
Nonstop2h 50m
St. LouisPhoenix
STL - PHX
STLPHX
Lambert-St Louis
Sat 1/31
1:45 pm-5:50 pm
1 stop5h 05m
Phoenix Sky Harbor Intl
Sat 2/7
8:55 am-12:45 pm
Nonstop2h 50m
St. LouisPhoenix
STL - PHX
STLPHX
Lambert-St Louis
Thu 4/9
9:40 pm-11:05 pm
Nonstop3h 25m
Phoenix Sky Harbor Intl
Sat 4/18
12:40 pm-10:25 pm
1 stop7h 45m
St. LouisPhoenix
STL - PHX
STLPHX
Lambert-St Louis
Sat 3/7
6:00 am-8:35 am
Nonstop3h 35m
Phoenix Sky Harbor Intl
Thu 3/12
5:00 am-9:50 am
Nonstop2h 50m
St. LouisPhoenix
STL - PHX
STLPHX
Lambert-St Louis
Sun 3/8
5:50 am-7:25 am
Nonstop3h 35m
Phoenix Sky Harbor Intl
Sat 3/14
4:15 pm-9:05 pm
Nonstop2h 50m
St. LouisPhoenix
STL - PHX
STLPHX
Lambert-St Louis
Wed 3/4
10:15 am-2:05 pm
1 stop4h 50m
Phoenix Sky Harbor Intl
Sat 3/7
3:05 pm-6:55 pm
Nonstop2h 50m
St. LouisPhoenix
STL - PHX
STLPHX
Lambert-St Louis
Mon 4/6
9:45 pm-11:15 pm
Nonstop3h 30m
Phoenix Sky Harbor Intl
Thu 4/9
5:15 am-10:05 am
Nonstop2h 50m
St. LouisPhoenix
STL - PHX
STLPHX
Lambert-St Louis
Wed 3/4
5:18 pm-11:59 pm
1 stop7h 41m
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.
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 January 2, 2026.
To ensure you get the cheapest price possible for a flight from St. Louis to Mesa, you should look to book at least 87 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, October is the cheapest month in which you can book a flight from St. Louis to Mesa (average of $107). Flying from St. Louis to Mesa in June is currently the most expensive (average of $234). 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 5, 2026.
It’s optimal to fly from St. Louis to Mesa in the evening. By choosing this option you can save up to 16% on the cost of your flight, compared to a flight in the morning.
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 January 3, 2026.
Travelers seeking maximum savings on their St. Louis to Mesa flight should consider departing on Friday 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.
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 5, 2026.
Read through reviews of airlines operating flights from St. Louis to Mesa, such as Southwest, Delta, and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
Boarding
Overall
Comfort
Crew
Food
Reviews
Thomas,Dec 2025
SEA - DEN
Entertainment
Boarding
Overall
Comfort
Crew
Food
Reviews
Thomas,Dec 2025
SEA - DEN
Entertainment
Boarding
Overall
Comfort
Crew
Food
Reviews
Thomas,Dec 2025
SEA - DEN
Entertainment
Boarding
Overall
Comfort
Crew
Food
Reviews
Thomas,Dec 2025
SEA - DEN
Entertainment
Boarding
Overall
Comfort
Crew
Food
Reviews
Thomas,Dec 2025
SEA - DEN
Entertainment
Boarding
Overall
Comfort
Crew
Food
Reviews
Thomas,Dec 2025
SEA - DEN
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.
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Alternative routes for St. Louis to Mesa
See prices for flight routes from nearby airports that may be better suited for you.
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 January 5, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$94 | Average$202 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$158 | Average$200 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$210 | Average$383 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$215 | Average$385 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$223 | Average$404 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$236 | Average$362 | FlexibilityNo cancel fee | On-timeN/A |