$95+ 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 7/14. Fares are subject to change and may not be available on all flights or dates of travel.
STL — PHX
Jun 24 — Jul 11
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
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 24 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 May 25, 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 May 25, 2026.
This Super.com deal was found by Cheapflights users on 5/21. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/238:08 pm
STL
- PHX
1 stop5h 21m
Frontier
Tue 5/2611:30 pm
PHX
- STL
1 stop7h 25m
Frontier
Deal found 5/21![Frontier logo]()
$247
This Frontier deal was found by Cheapflights users on 5/24. 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.
Wed 6/177:03 pm
STL
- PHX
1 stop6h 01m
Frontier
Sat 6/206:24 am
PHX
- STL
1 stop10h 10m
Frontier
Deal found 5/24![Frontier logo]()
$248
This Super.com deal was found by Cheapflights users on 5/22. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/276:51 pm
STL
- PHX
1 stop6h 33m
Frontier
Sun 5/316:00 am
PHX
- STL
1 stop6h 31m
Frontier
Deal found 5/22![Frontier logo]()
$249
This Frontier deal was found by Cheapflights users on 5/24. 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.
Wed 6/105:06 pm
STL
- PHX
1 stop7h 14m
Frontier
Mon 6/156:40 am
PHX
- STL
1 stop10h 13m
Frontier
Deal found 5/24![Frontier logo]()
$250
This Super.com deal was found by Cheapflights users on 5/20. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/288:08 pm
STL
- PHX
1 stop5h 21m
Frontier
Sun 5/3112:20 am
PHX
- STL
1 stop8h 09m
Frontier
Deal found 5/20![Frontier logo]()
$251
This Priceline deal was found by Cheapflights users on 5/24. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/48:08 pm
STL
- PHX
1 stop5h 21m
Frontier
Thu 6/256:24 am
PHX
- STL
1 stop9h 54m
Frontier
Deal found 5/24![Frontier logo]()
$252
This Jettzy deal was found by Cheapflights users on 5/22. 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 Jettzy is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/117:10 pm
STL
- PHX
1 stop5h 55m
Frontier
Wed 7/159:58 pm
PHX
- STL
1 stop18h 17m
Frontier
Deal found 5/22![Frontier logo]()
$255
This Frontier deal was found by Cheapflights users on 5/20. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/113:34 pm
STL
- PHX
1 stop9h 22m
Frontier
Sat 7/186:24 am
PHX
- STL
1 stop6h 25m
Frontier
Deal found 5/20![Frontier logo]()
$256
This Mytrip deal was found by Cheapflights users on 5/24. 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.
Wed 7/87:03 pm
STL
- PHX
1 stop6h 02m
Frontier
Wed 7/152:04 pm
PHX
- STL
1 stop26h 11m
Frontier
Deal found 5/24![Frontier logo]()
$258
This Booking.com deal was found by Cheapflights users on 5/21. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/218:08 pm
STL
- PHX
1 stop5h 21m
Frontier
Fri 5/2211:30 pm
PHX
- STL
1 stop7h 25m
Frontier
Deal found 5/21![Frontier logo]()
$259
This Gotogate deal was found by Cheapflights users on 5/22. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/255:19 pm
STL
- PHX
1 stop25h 31m
Frontier
Tue 10/2710:40 pm
PHX
- STL
1 stop21h 59m
Frontier
Deal found 5/22![Frontier logo]()
$260
This Booking.com deal was found by Cheapflights users on 5/20. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/219:06 pm
STL
- PHX
1 stop28h 18m
Frontier
Tue 5/2612:20 am
PHX
- STL
1 stop21h 37m
Frontier
Deal found 5/20![Frontier logo]()
$261
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 May 25, 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 May 25, 2026.
This Southwest deal was found by Cheapflights users on 5/24. 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 7/42:15 pm
STL
- PHX
1 stop4h 35m
Southwest
Tue 7/75:00 am
PHX
- STL
Nonstop2h 50m
Southwest
Deal found 5/24![Southwest logo]()
$283
This United Airlines deal was found by Cheapflights users on 5/22. 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.
Sat 6/65:10 am
STL
- PHX
1 stop5h 50m
United Airlines
Sat 6/64:29 pm
PHX
- STL
1 stop5h 28m
United Airlines
Deal found 5/22![United Airlines logo]()
$297
This Southwest deal was found by Cheapflights users on 5/22. 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 6/25:35 am
STL
- PHX
1 stop5h 45m
Southwest
Tue 6/93:30 pm
PHX
- STL
1 stop6h 10m
Southwest
Deal found 5/22![Southwest logo]()
$297
This Southwest deal was found by Cheapflights users on 5/23. 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 7/309:45 pm
STL
- PHX
Nonstop3h 15m
Southwest
Tue 8/46:00 am
PHX
- STL
Nonstop2h 55m
Southwest
Deal found 5/23![Southwest logo]()
$314
This Southwest deal was found by Cheapflights users on 5/23. 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 7/12:10 pm
STL
- PHX
1 stop5h 50m
Southwest
Sun 7/58:00 pm
PHX
- STL
Nonstop2h 55m
Southwest
Deal found 5/23![Southwest logo]()
$324
This Southwest deal was found by Cheapflights users on 5/24. 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 5/315:35 am
STL
- PHX
Nonstop3h 25m
Southwest
Mon 6/88:55 pm
PHX
- STL
Nonstop2h 55m
Southwest
Deal found 5/24![Southwest logo]()
$351
This Southwest deal was found by Cheapflights users on 5/22. 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 7/99:45 pm
STL
- PHX
Nonstop3h 15m
Southwest
Thu 7/161:35 pm
PHX
- STL
Nonstop2h 55m
Southwest
Deal found 5/22![Southwest logo]()
$351
This Southwest deal was found by Cheapflights users on 5/22. 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 5/296:45 pm
STL
- PHX
1 stop5h 25m
Southwest
Sun 5/318:25 pm
PHX
- STL
Nonstop2h 50m
Southwest
Deal found 5/22![Southwest logo]()
$361
This Southwest deal was found by Cheapflights users on 5/20. 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.
Fri 6/55:05 am
STL
- PHX
1 stop6h 15m
Southwest
Mon 6/84:40 pm
PHX
- STL
Nonstop2h 55m
Southwest
Deal found 5/20![Southwest logo]()
$361
This Southwest deal was found by Cheapflights users on 5/24. 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 6/126:30 pm
STL
- PHX
1 stop5h 45m
Southwest
Sun 6/145:00 am
PHX
- STL
Nonstop2h 50m
Southwest
Deal found 5/24![Southwest logo]()
$361
This Southwest deal was found by Cheapflights users on 5/24. 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 7/65:45 am
STL
- PHX
Nonstop3h 10m
Southwest
Fri 7/104:40 pm
PHX
- STL
Nonstop2h 55m
Southwest
Deal found 5/24![Southwest logo]()
$393
This Southwest deal was found by Cheapflights users on 5/20. 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.
Tue 7/289:40 am
STL
- PHX
Nonstop3h 10m
Southwest
Sun 8/28:00 pm
PHX
- STL
Nonstop2h 55m
Southwest
Deal found 5/20![Southwest logo]()
$405
Last-minute flights from St. Louis to MesaDiscover last-minute flight deals from St. Louis to Mesa. Data last updated May 25, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Mesa. Data last updated May 25, 2026 and is based on user searches.
This Booking.com deal was found by Cheapflights users on 5/21. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/218:08 pm
STL
- PHX
1 stop5h 21m
Frontier
Fri 5/2211:30 pm
PHX
- STL
1 stop7h 25m
Frontier
Deal found 5/21![Frontier logo]()
$259
This Booking.com deal was found by Cheapflights users on 5/20. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/219:06 pm
STL
- PHX
1 stop28h 18m
Frontier
Tue 5/2612:20 am
PHX
- STL
1 stop21h 37m
Frontier
Deal found 5/20![Frontier logo]()
$261
This Super.com deal was found by Cheapflights users on 5/21. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/238:08 pm
STL
- PHX
1 stop5h 21m
Frontier
Tue 5/2611:30 pm
PHX
- STL
1 stop7h 25m
Frontier
Deal found 5/21![Frontier logo]()
$247
This Booking.com deal was found by Cheapflights users on 5/20. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/238:08 pm
STL
- PHX
1 stop5h 21m
Frontier
Mon 5/2510:27 pm
PHX
- STL
1 stop17h 39m
Frontier
Deal found 5/20![Frontier logo]()
$262
This Super.com deal was found by Cheapflights users on 5/22. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/276:51 pm
STL
- PHX
1 stop6h 33m
Frontier
Sun 5/316:00 am
PHX
- STL
1 stop6h 31m
Frontier
Deal found 5/22![Frontier logo]()
$249
This Super.com deal was found by Cheapflights users on 5/20. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/288:08 pm
STL
- PHX
1 stop5h 21m
Frontier
Sun 5/3112:20 am
PHX
- STL
1 stop8h 09m
Frontier
Deal found 5/20![Frontier logo]()
$251
This Super.com deal was found by Cheapflights users on 5/24. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/319:06 pm
STL
- PHX
1 stop16h 17m
Frontier
Mon 6/85:15 am
PHX
- STL
1 stop12h 08m
Frontier
Deal found 5/24![Frontier logo]()
$264
This Priceline deal was found by Cheapflights users on 5/24. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/48:08 pm
STL
- PHX
1 stop5h 21m
Frontier
Thu 6/256:24 am
PHX
- STL
1 stop9h 54m
Frontier
Deal found 5/24![Frontier logo]()
$252
This Frontier deal was found by Cheapflights users on 5/24. 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.
Wed 6/105:06 pm
STL
- PHX
1 stop7h 14m
Frontier
Mon 6/156:40 am
PHX
- STL
1 stop10h 13m
Frontier
Deal found 5/24![Frontier logo]()
$250
This Frontier deal was found by Cheapflights users on 5/24. 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.
Wed 6/177:03 pm
STL
- PHX
1 stop6h 01m
Frontier
Sat 6/206:24 am
PHX
- STL
1 stop10h 10m
Frontier
Deal found 5/24![Frontier logo]()
$248
This Expedia deal was found by Cheapflights users on 5/20. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/177:46 pm
STL
- PHX
1 stop17h 38m
Frontier
Wed 6/2411:21 am
PHX
- STL
1 stop6h 02m
Frontier
Deal found 5/20![Frontier logo]()
$263
This Trip.com deal was found by Cheapflights users on 5/22. 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.
Fri 6/195:06 pm
STL
- PHX
1 stop7h 14m
Frontier
Fri 6/267:45 am
PHX
- STL
1 stop28h 21m
Frontier
Deal found 5/22![Frontier logo]()
$266
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 May 25, 2026.
Search for one-way flight options from St. Louis to Mesa. Find affordable one-way fares based on user searches. Data last updated May 25, 2026.
This Kiwi.com deal was found by Cheapflights users on 5/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/148:08 pm
STL
- PHX
1 stop16h 03m
Frontier
Deal found 5/20![Frontier logo]()
$95
This Kiwi.com deal was found by Cheapflights users on 5/21. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/26:31 pm
STL
- PHX
1 stop29h 49m
Frontier
Deal found 5/21![Frontier logo]()
$122
This Super.com deal was found by Cheapflights users on 5/24. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/135:06 pm
STL
- PHX
1 stop7h 14m
Frontier
Deal found 5/24![Frontier logo]()
$123
This Frontier deal was found by Cheapflights users on 5/24. 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.
Wed 7/87:03 pm
STL
- PHX
1 stop6h 02m
Frontier
Deal found 5/24![Frontier logo]()
$124
This Super.com deal was found by Cheapflights users on 5/20. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/48:08 pm
STL
- PHX
1 stop5h 21m
Frontier
Deal found 5/20![Frontier logo]()
$125
This Frontier deal was found by Cheapflights users on 5/24. 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.
Fri 6/125:06 pm
STL
- PHX
1 stop7h 14m
Frontier
Deal found 5/24![Frontier logo]()
$126
This Frontier deal was found by Cheapflights users on 5/20. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/154:52 pm
STL
- PHX
1 stop7h 26m
Frontier
Deal found 5/20![Frontier logo]()
$128
This Expedia deal was found by Cheapflights users on 5/21. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/178:08 pm
STL
- PHX
1 stop16h 13m
Frontier
Deal found 5/21![Frontier logo]()
$130
This Super.com deal was found by Cheapflights users on 5/23. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/57:10 pm
STL
- PHX
1 stop18h 17m
Frontier
Deal found 5/23![Frontier logo]()
$131
This Frontier deal was found by Cheapflights users on 5/25. 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.
Sun 7/193:41 pm
STL
- PHX
1 stop9h 18m
Frontier
Deal found 5/25![Frontier logo]()
$132
This Kiwi.com deal was found by Cheapflights users on 5/21. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/198:08 pm
STL
- PHX
1 stop5h 26m
Frontier
Deal found 5/21![Frontier logo]()
$136
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 May 25, 2026.
Round-trip from | $247 (Super.com) |
|---|---|
One-way from | $95 (Kiwi.com) |
Popular in | April |
Cheapest in | November |
Average price | $376 |
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 May 25, 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 - PHX
STLPHX
Lambert-St Louis
Sat 7/4
2:15 pm-4:50 pm
1 stop4h 35m
Phoenix Sky Harbor Intl
Tue 7/7
5:00 am-9:50 am
Nonstop2h 50m
$283
St. LouisPhoenix
STL - PHX
STLPHX
Lambert-St Louis
Sat 6/6
5:10 am-9:00 am
1 stop5h 50m
Phoenix Sky Harbor Intl
Sat 6/6
4:29 pm-11:57 pm
1 stop5h 28m
$297
St. LouisPhoenix
STL - PHX
STLPHX
Lambert-St Louis
Tue 6/2
5:35 am-9:20 am
1 stop5h 45m
Phoenix Sky Harbor Intl
Tue 6/9
3:30 pm-11:40 pm
1 stop6h 10m
$297
St. LouisPhoenix
STL - PHX
STLPHX
Lambert-St Louis
Thu 7/30
9:45 pm-11:00 pm
Nonstop3h 15m
Phoenix Sky Harbor Intl
Tue 8/4
6:00 am-10:55 am
Nonstop2h 55m
$314
St. LouisPhoenix
STL - PHX
STLPHX
Lambert-St Louis
Wed 7/1
2:10 pm-6:00 pm
1 stop5h 50m
Phoenix Sky Harbor Intl
Sun 7/5
8:00 pm-12:55 am
Nonstop2h 55m
$324
St. LouisPhoenix
STL - PHX
STLPHX
Lambert-St Louis
Sun 5/31
5:35 am-7:00 am
Nonstop3h 25m
Phoenix Sky Harbor Intl
Mon 6/8
8:55 pm-1:50 am
Nonstop2h 55m
$351
St. LouisPhoenix
STL - PHX
STLPHX
Lambert-St Louis
Thu 7/9
9:45 pm-11:00 pm
Nonstop3h 15m
Phoenix Sky Harbor Intl
Thu 7/16
1:35 pm-6:30 pm
Nonstop2h 55m
$351
St. LouisPhoenix
STL - PHX
STLPHX
Lambert-St Louis
Fri 5/29
6:45 pm-10:10 pm
1 stop5h 25m
Phoenix Sky Harbor Intl
Sun 5/31
8:25 pm-1:15 am
Nonstop2h 50m
$361
St. LouisPhoenix
STL - PHX
STLPHX
Lambert-St Louis
Fri 6/5
5:05 am-9:20 am
1 stop6h 15m
Phoenix Sky Harbor Intl
Mon 6/8
4:40 pm-9:35 pm
Nonstop2h 55m
$361
St. LouisPhoenix
STL - PHX
STLPHX
Lambert-St Louis
Fri 6/12
6:30 pm-10:15 pm
1 stop5h 45m
Phoenix Sky Harbor Intl
Sun 6/14
5:00 am-9:50 am
Nonstop2h 50m
$361
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 May 25, 2026.
It’s optimal to fly from St. Louis to Mesa in the evening. By choosing this option you can save up to 29% on the cost of your flight, compared to a flight in the morning.
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 May 25, 2026.
The most flights from STL to MS9 are scheduled on a Monday (11 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (2 on average).
How much does it cost to fly round-trip from St. Louis to Mesa?
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 May 16, 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 at noon 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 May 25, 2026.
Read through reviews of airlines operating flights from St. Louis to Mesa, such as Southwest,Delta, andUnited Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.5
Comfort
8.0
Overall
7.9
Crew
8.6
Boarding
8.1
Food
7.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Entertainment
7.5
Comfort
8.0
Overall
7.9
Crew
8.6
Boarding
8.1
Food
7.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Entertainment
7.5
Comfort
8.0
Overall
7.9
Crew
8.6
Boarding
8.1
Food
7.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Entertainment
7.5
Comfort
8.0
Overall
7.9
Crew
8.6
Boarding
8.1
Food
7.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Entertainment
7.5
Comfort
8.0
Overall
7.9
Crew
8.6
Boarding
8.1
Food
7.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Entertainment
7.5
Comfort
8.0
Overall
7.9
Crew
8.6
Boarding
8.1
Food
7.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
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.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Other flight options
Other flights from St. Louis
Popular flights
Top destinations
Alternative routes for St. Louis to Mesa
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Mesa by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from St. Louis to Mesa by cabin class
Find flights from St. Louis to Mesa, based on your preferred cabin class, be it economy, premium economy, business, or first class.
St. Louis and Mesa flights
Browse other St. Louis and Mesa flight options. Last updated on May 25, 2026.
Other flights from St. Louis
Browse through other flights departing from St. Louis. Flights are based on user searches made on Cheapflights and were last updated on May 25, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
St. Louis to Mesa flights
Consider these flights traveling from St. Louis to Mesa.
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 May 25, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$94 | Average$212 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$121 | Average$199 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$148 | Average$386 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$213 | Average$382 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$218 | Average$394 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$236 | Average$336 | FlexibilityNo cancel fee | On-timeN/A |