$94+ 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 11/8. Fares are subject to change and may not be available on all flights or dates of travel.
STL — PHX
Sep 8 — Sep 151
Round-trip
1 adult, Economy
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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 December, booked 16 days in advance, depart on a Wednesday or Friday and return on a Friday
Cheap flight deals from St. Louis to Mesa
Cheapest
Best
Last-minute
One-way
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 August 9, 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 August 9, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/7. 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.
Sun 10/186:41 pm -
1 stop6h 34m
Fri 10/238:16 am -
1 stop8h 59m
Deal found 8/7![Frontier logo]()
$200
This Kiwi.com deal was found by Cheapflights users on 8/8. 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.
Wed 9/168:10 pm -
1 stop20h 07m
Tue 9/228:56 pm -
1 stop20h 21m
Deal found 8/8![Frontier logo]()
$202
This Kiwi.com deal was found by Cheapflights users on 8/9. 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.
Tue 10/138:10 pm -
1 stop13h 01m
Tue 10/208:16 am -
1 stop8h 59m
Deal found 8/9![Frontier logo]()
$207
This Kiwi.com deal was found by Cheapflights users on 8/9. 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.
Thu 11/56:49 pm -
1 stop26h 29m
Sun 11/87:40 am -
1 stop10h 35m
Deal found 8/9![Frontier logo]()
$209
This Kiwi.com deal was found by Cheapflights users on 8/9. 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.
Fri 10/98:10 pm -
1 stop13h 01m
Mon 10/126:36 pm -
1 stop22h 39m
Deal found 8/9![Frontier logo]()
$212
This Kiwi.com deal was found by Cheapflights users on 8/7. 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.
Fri 9/46:17 pm -
1 stop26h 14m
Fri 9/118:56 pm -
1 stop20h 21m
Deal found 8/7![Frontier logo]()
$213
This Kiwi.com deal was found by Cheapflights users on 8/7. 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.
Sun 9/67:58 pm -
1 stop5h 41m
Sun 9/138:56 pm -
1 stop20h 21m
Deal found 8/7![Frontier logo]()
$214
This Kiwi.com deal was found by Cheapflights users on 8/6. 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.
Tue 9/85:27 pm -
1 stop16h 48m
Tue 9/158:56 pm -
1 stop20h 21m
Deal found 8/6![Frontier logo]()
$217
This Kiwi.com deal was found by Cheapflights users on 8/7. 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.
Mon 9/218:10 pm -
1 stop13h 50m
Wed 9/239:15 am -
1 stop8h 02m
Deal found 8/7![Frontier logo]()
$218
This Kiwi.com deal was found by Cheapflights users on 8/7. 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.
Sat 9/198:10 pm -
1 stop13h 50m
Mon 9/219:15 am -
1 stop8h 02m
Deal found 8/7![Frontier logo]()
$220
This Kiwi.com deal was found by Cheapflights users on 8/6. 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.
Sun 11/16:49 pm -
1 stop26h 29m
Thu 11/57:55 pm -
1 stop22h 20m
Deal found 8/6![Frontier logo]()
$222
This Kiwi.com deal was found by Cheapflights users on 8/9. 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.
Sun 9/2710:20 am -
1 stop28h 46m
Tue 9/298:56 pm -
1 stop20h 21m
Deal found 8/9![Frontier logo]()
$225
Best flights from St. Louis to MesaDiscover carefully curated flight deals from St. Louis to Mesa that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 9, 2026.
Discover carefully curated flight deals from St. Louis to Mesa that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 9, 2026.
This Southwest deal was found by Cheapflights users on 8/7. 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.
Mon 9/216:00 am -
Nonstop3h 15m
Wed 9/235:40 pm -
Nonstop3h 00m
Deal found 8/7![Southwest logo]()
$403
This Alaska Airlines deal was found by Cheapflights users on 8/6. 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.
Wed 9/166:29 am -
2 stops14h 38m
Tue 9/227:49 pm -
2 stops20h 49m
Deal found 8/6![Alaska Airlines logo]()
$465
This Southwest deal was found by Cheapflights users on 8/5. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/316:00 pm -
Nonstop3h 15m
Thu 9/35:00 am -
Nonstop2h 50m
Deal found 8/5![Southwest logo]()
$403
This Southwest deal was found by Cheapflights users on 8/4. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/167:35 am -
Nonstop3h 15m
Wed 9/162:30 pm -
1 stop4h 45m
Deal found 8/4![Southwest logo]()
$413
This Alaska Airlines deal was found by Cheapflights users on 8/7. 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.
Mon 9/283:19 pm -
2 stops25h 14m
Wed 10/147:24 pm -
2 stops26h 35m
Deal found 8/7![Alaska Airlines logo]()
$473
This Southwest deal was found by Cheapflights users on 8/5. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/286:00 pm -
Nonstop3h 15m
Sat 8/296:10 am -
Nonstop2h 55m
Deal found 8/5![Southwest logo]()
$427
This Southwest deal was found by Cheapflights users on 8/7. 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.
Fri 9/42:20 pm -
1 stop4h 30m
Tue 9/86:00 am -
Nonstop2h 55m
Deal found 8/7![Southwest logo]()
$433
This Southwest deal was found by Cheapflights users on 8/8. 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.
Sat 9/194:00 pm -
Nonstop3h 15m
Mon 9/215:00 am -
Nonstop2h 50m
Deal found 8/8![Southwest logo]()
$435
This Southwest deal was found by Cheapflights users on 8/5. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/242:20 pm -
1 stop4h 30m
Sun 9/275:45 am -
Nonstop2h 55m
Deal found 8/5![Southwest logo]()
$440
This Southwest deal was found by Cheapflights users on 8/9. 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.
Sun 11/14:00 pm -
1 stop5h 00m
Tue 11/176:15 pm -
Nonstop2h 50m
Deal found 8/9![Southwest logo]()
$441
This Southwest deal was found by Cheapflights users on 8/5. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/2811:50 am -
Nonstop3h 10m
Fri 8/286:55 pm -
Nonstop2h 55m
Deal found 8/5![Southwest logo]()
$451
This Southwest deal was found by Cheapflights users on 8/8. 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.
Sun 10/189:45 pm -
Nonstop3h 20m
Sun 10/257:30 am -
1 stop4h 20m
Deal found 8/8![Southwest logo]()
$471
Last-minute flights from St. Louis to MesaDiscover last-minute flight deals from St. Louis to Mesa. Data last updated August 9, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Mesa. Data last updated August 9, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 8/7. 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.
Fri 9/46:17 pm -
1 stop26h 14m
Fri 9/118:56 pm -
1 stop20h 21m
Deal found 8/7![Frontier logo]()
$213
This Kiwi.com deal was found by Cheapflights users on 8/7. 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.
Sun 9/67:58 pm -
1 stop5h 41m
Sun 9/138:56 pm -
1 stop20h 21m
Deal found 8/7![Frontier logo]()
$214
This Kiwi.com deal was found by Cheapflights users on 8/7. 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.
Sun 9/67:58 pm -
1 stop5h 41m
Sat 9/129:15 am -
1 stop8h 02m
Deal found 8/7![Frontier logo]()
$229
This Kiwi.com deal was found by Cheapflights users on 8/6. 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.
Tue 9/85:27 pm -
1 stop16h 48m
Tue 9/158:56 pm -
1 stop20h 21m
Deal found 8/6![Frontier logo]()
$217
This Kiwi.com deal was found by Cheapflights users on 8/8. 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.
Wed 9/168:10 pm -
1 stop20h 07m
Tue 9/228:56 pm -
1 stop20h 21m
Deal found 8/8![Frontier logo]()
$202
This Kiwi.com deal was found by Cheapflights users on 8/7. 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.
Thu 9/1710:20 am -
1 stop13h 30m
Sun 9/208:56 pm -
1 stop20h 21m
Deal found 8/7![Frontier logo]()
$226
This Kiwi.com deal was found by Cheapflights users on 8/7. 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.
Sat 9/198:10 pm -
1 stop13h 50m
Mon 9/219:15 am -
1 stop8h 02m
Deal found 8/7![Frontier logo]()
$220
This Kiwi.com deal was found by Cheapflights users on 8/7. 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.
Mon 9/218:10 pm -
1 stop13h 50m
Wed 9/239:15 am -
1 stop8h 02m
Deal found 8/7![Frontier logo]()
$218
This Kiwi.com deal was found by Cheapflights users on 8/9. 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.
Mon 9/212:29 pm -
2 stops33h 21m
Fri 9/256:25 am -
1 stop10h 52m
Deal found 8/9![Frontier logo]()
$230
This Kiwi.com deal was found by Cheapflights users on 8/9. 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.
Sun 9/2710:20 am -
1 stop28h 46m
Tue 9/298:56 pm -
1 stop20h 21m
Deal found 8/9![Frontier logo]()
$225
One-way flights from St. Louis to MesaSearch for one-way flight options from St. Louis to Mesa. Find affordable one-way fares based on user searches. Data last updated August 9, 2026.
Search for one-way flight options from St. Louis to Mesa. Find affordable one-way fares based on user searches. Data last updated August 9, 2026.
This Trip.com deal was found by Cheapflights users on 8/9. 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.
Sun 11/88:10 pm -
1 stop13h 48m
Deal found 8/9![Frontier logo]()
$94
This Kiwi.com deal was found by Cheapflights users on 8/8. 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.
Sat 9/128:10 pm -
1 stop13h 50m
Deal found 8/8![Frontier logo]()
$101
This Kiwi.com deal was found by Cheapflights users on 8/7. 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.
Sun 9/67:58 pm -
1 stop5h 41m
Deal found 8/7![Frontier logo]()
$104
This Kiwi.com deal was found by Cheapflights users on 8/8. 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.
Wed 9/308:10 pm -
1 stop25h 41m
Deal found 8/8![Frontier logo]()
$110
This Kiwi.com deal was found by Cheapflights users on 8/6. 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.
Wed 10/78:10 pm -
1 stop13h 01m
Deal found 8/6![Frontier logo]()
$112
This Kiwi.com deal was found by Cheapflights users on 8/6. 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.
Sun 10/410:20 am -
1 stop28h 46m
Deal found 8/6![Frontier logo]()
$113
This Kiwi.com deal was found by Cheapflights users on 8/7. 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.
Mon 9/218:10 pm -
1 stop13h 50m
Deal found 8/7![Frontier logo]()
$114
This Kiwi.com deal was found by Cheapflights users on 8/8. 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.
Fri 9/118:10 pm -
1 stop13h 50m
Deal found 8/8![Frontier logo]()
$115
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 August 9, 2026.
Round-trip from | $200 (Kiwi.com) |
|---|---|
One-way from | $94 (Trip.com) |
Popular in | June |
Cheapest in | November |
Average price | $384 |
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 August 9, 2026.
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
Cheapest round-trip
St. LouisPhoenix
STL Lambert-St Louis - PHX Phoenix Sky Harbor Intl
STLPHX
Lambert-St Louis
Mon 9/21
6:00 am-7:15 am
Nonstop3h 15m
Phoenix Sky Harbor Intl
Wed 9/23
5:40 pm-10:40 pm
Nonstop3h 00m
$403
Quickest round-trip
St. LouisPhoenix
STL Lambert-St Louis - PHX Phoenix Sky Harbor Intl
STLPHX
Lambert-St Louis
Mon 8/31
6:00 pm-7:15 pm
Nonstop3h 15m
Phoenix Sky Harbor Intl
Thu 9/3
5:00 am-9:50 am
Nonstop2h 50m
$403
St. LouisPhoenix
STL Lambert-St Louis - PHX Phoenix Sky Harbor Intl
STLPHX
Lambert-St Louis
Wed 9/16
7:35 am-8:50 am
Nonstop3h 15m
Phoenix Sky Harbor Intl
Wed 9/16
2:30 pm-9:15 pm
1 stop4h 45m
$413
St. LouisPhoenix
STL Lambert-St Louis - PHX Phoenix Sky Harbor Intl
STLPHX
Lambert-St Louis
Fri 8/28
6:00 pm-7:15 pm
Nonstop3h 15m
Phoenix Sky Harbor Intl
Sat 8/29
6:10 am-11:05 am
Nonstop2h 55m
$427
St. LouisPhoenix
STL Lambert-St Louis - PHX Phoenix Sky Harbor Intl
STLPHX
Lambert-St Louis
Fri 9/4
2:20 pm-4:50 pm
1 stop4h 30m
Phoenix Sky Harbor Intl
Tue 9/8
6:00 am-10:55 am
Nonstop2h 55m
$433
St. LouisPhoenix
STL Lambert-St Louis - PHX Phoenix Sky Harbor Intl
STLPHX
Lambert-St Louis
Sat 9/19
4:00 pm-5:15 pm
Nonstop3h 15m
Phoenix Sky Harbor Intl
Mon 9/21
5:00 am-9:50 am
Nonstop2h 50m
$435
St. LouisPhoenix
STL Lambert-St Louis - PHX Phoenix Sky Harbor Intl
STLPHX
Lambert-St Louis
Thu 9/24
2:20 pm-4:50 pm
1 stop4h 30m
Phoenix Sky Harbor Intl
Sun 9/27
5:45 am-10:40 am
Nonstop2h 55m
$440
St. LouisPhoenix
STL Lambert-St Louis - PHX Phoenix Sky Harbor Intl
STLPHX
Lambert-St Louis
Sun 11/1
4:00 pm-8:00 pm
1 stop5h 00m
Phoenix Sky Harbor Intl
Tue 11/17
6:15 pm-10:05 pm
Nonstop2h 50m
$441
St. LouisPhoenix
STL Lambert-St Louis - PHX Phoenix Sky Harbor Intl
STLPHX
Lambert-St Louis
Fri 8/28
11:50 am-1:00 pm
Nonstop3h 10m
Phoenix Sky Harbor Intl
Fri 8/28
6:55 pm-11:50 pm
Nonstop2h 55m
$451
St. LouisPhoenix
STL Lambert-St Louis - PHX Phoenix Sky Harbor Intl
STLPHX
Lambert-St Louis
Wed 9/16
6:29 am-7:07 pm
2 stops14h 38m
Phoenix Sky Harbor Intl
Tue 9/22
7:49 pm-6:38 pm
2 stops20h 49m
$465
Showing 1-10 of 23 resultsSorted by cheapest first
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.
STL-PHX
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
STL-MS9
STL-PHX
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 August 9, 2026.
It’s optimal to fly from St. Louis to Mesa in the evening. By choosing this option you can save up to 30% on the cost of your flight, compared to a flight in the morning.
How much does it cost to fly round-trip from St. Louis to Mesa?
Airfare is below average for this route at the moment.
St. Louis to Mesa flights typically cost between $347 and $474 in October.The cheapest round-trip price found within the last 5 days was $200 on Frontier (Oct 18-Oct 23).
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 August 1, 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 afternoons 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 August 9, 2026.
Read through reviews of airlines operating flights from St. Louis to Mesa, such as Southwest,United Airlines, andAmerican Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Boarding
8.1
Food
7.0
Entertainment
7.5
Crew
8.6
Overall
8.0
Comfort
8.0
Reviews
1 / 20
2.0
MediocreBhoopal,Nov 2024
STL - BOS
Boarding
8.1
Food
7.0
Entertainment
7.5
Crew
8.6
Overall
8.0
Comfort
8.0
Reviews
1 / 20
2.0
MediocreBhoopal,Nov 2024
STL - BOS
Boarding
8.1
Food
7.0
Entertainment
7.5
Crew
8.6
Overall
8.0
Comfort
8.0
Reviews
1 / 20
2.0
MediocreBhoopal,Nov 2024
STL - BOS
Boarding
8.1
Food
7.0
Entertainment
7.5
Crew
8.6
Overall
8.0
Comfort
8.0
Reviews
1 / 20
2.0
MediocreBhoopal,Nov 2024
STL - BOS
Boarding
8.1
Food
7.0
Entertainment
7.5
Crew
8.6
Overall
8.0
Comfort
8.0
Reviews
1 / 20
2.0
MediocreBhoopal,Nov 2024
STL - BOS
Boarding
8.1
Food
7.0
Entertainment
7.5
Crew
8.6
Overall
8.0
Comfort
8.0
Reviews
1 / 20
2.0
MediocreBhoopal,Nov 2024
STL - BOS
Related info for your journey
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| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$94 | Average$212 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$148 | Average$381 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$215 | Average$383 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$232 | Average$407 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$292 | Average$380 | FlexibilityNo cancel fee | On-time62% |