$59+ Cheap flights from Mesa, AZ to St. Louis (STL)
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 4/11. Fares are subject to change and may not be available on all flights or dates of travel.
PHX — STL
Mar 27 — Apr 31
1 adult, Economy
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Find cheap flights from Mesa to St. Louis 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 Mesa to Lambert-St Louis are usually found in January or December, booked 25 days in advance, depart on a Friday or Tuesday and return on a Wednesday
Cheap flight deals from Mesa to St. Louis
Cheapest
Best
Last-minute
One-way
Cheapest flights from Mesa to St. LouisExplore the most affordable flight options available from Mesa to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 25, 2026.
Explore the most affordable flight options available from Mesa to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 25, 2026.
This Kiwi.com deal was found by Cheapflights users on 2/21. 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.
Sat 4/189:52 am
PHX
- STL
1 stop7h 40m
Frontier
Sat 4/258:17 pm
STL
- PHX
1 stop13h 19m
Frontier
Deal found 2/21![Frontier logo]()
$132
This Kiwi.com deal was found by Cheapflights users on 2/23. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/84:27 pm
PHX
- STL
1 stop17h 52m
Frontier
Sat 4/111:06 pm
STL
- PHX
Nonstop3h 35m
Frontier
Deal found 2/23![Frontier logo]()
$159
This Kiwi.com deal was found by Cheapflights users on 2/23. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/29:24 pm
PHX
- STL
1 stop10h 24m
Frontier
Mon 4/68:19 pm
STL
- PHX
1 stop17h 26m
Frontier
Deal found 2/23![Frontier logo]()
$161
This Kiwi.com deal was found by Cheapflights users on 2/23. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/99:24 pm
PHX
- STL
1 stop10h 24m
Frontier
Mon 4/138:19 pm
STL
- PHX
1 stop23h 28m
Frontier
Deal found 2/23![Frontier logo]()
$163
This Kiwi.com deal was found by Cheapflights users on 2/23. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/265:09 pm
PHX
- STL
Nonstop2h 53m
Frontier
Mon 3/308:12 pm
STL
- PHX
1 stop19h 49m
Frontier
Deal found 2/23![Frontier logo]()
$164
This Kiwi.com deal was found by Cheapflights users on 2/21. 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 3/265:09 pm
PHX
- STL
Nonstop2h 53m
Frontier
Sun 3/2910:49 pm
STL
- PHX
Nonstop3h 41m
Frontier
Deal found 2/21![Frontier logo]()
$166
This Super.com deal was found by Cheapflights users on 2/23. 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.
Thu 3/125:09 pm
PHX
- STL
Nonstop2h 53m
Frontier
Mon 3/165:46 pm
STL
- PHX
Nonstop3h 41m
Frontier
Deal found 2/23![Frontier logo]()
$168
This Kiwi.com deal was found by Cheapflights users on 2/22. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/249:24 pm
PHX
- STL
1 stop20h 08m
Frontier
Mon 4/278:17 pm
STL
- PHX
1 stop5h 30m
Frontier
Deal found 2/22![Frontier logo]()
$171
This Kiwi.com deal was found by Cheapflights users on 2/22. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/316:45 pm
PHX
- STL
1 stop13h 03m
Frontier
Tue 4/711:21 am
STL
- PHX
2 stops38h 26m
Frontier
Deal found 2/22![Frontier logo]()
$173
This Kiwi.com deal was found by Cheapflights users on 2/24. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/246:45 pm
PHX
- STL
1 stop13h 04m
Frontier
Tue 3/3111:27 am
STL
- PHX
2 stops29h 06m
Frontier
Deal found 2/24![Frontier logo]()
$174
Best flights from Mesa to St. LouisDiscover carefully curated flight deals from Mesa to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 25, 2026.
Discover carefully curated flight deals from Mesa to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 25, 2026.
This Southwest deal was found by Cheapflights users on 2/23. 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 4/85:35 am
PHX
- STL
Nonstop2h 50m
Southwest
Mon 4/136:00 pm
STL
- PHX
Nonstop3h 25m
Southwest
Deal found 2/23![Southwest logo]()
$260
This United Airlines deal was found by Cheapflights users on 2/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/3011:30 pm
PHX
- STL
1 stop7h 09m
United Airlines
Sun 5/37:45 am
STL
- PHX
1 stop7h 25m
United Airlines
Deal found 2/21![United Airlines logo]()
$375
This Southwest deal was found by Cheapflights users on 2/22. 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 3/315:55 am
PHX
- STL
Nonstop2h 45m
Southwest
Tue 4/75:35 pm
STL
- PHX
Nonstop3h 25m
Southwest
Deal found 2/22![Southwest logo]()
$315
This Southwest deal was found by Cheapflights users on 2/24. 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.
Thu 4/165:00 am
PHX
- STL
1 stop5h 50m
Southwest
Sun 4/199:55 pm
STL
- PHX
Nonstop3h 25m
Southwest
Deal found 2/24![Southwest logo]()
$333
This Southwest deal was found by Cheapflights users on 2/21. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/305:15 am
PHX
- STL
Nonstop2h 50m
Southwest
Sun 5/35:35 am
STL
- PHX
Nonstop3h 25m
Southwest
Deal found 2/21![Southwest logo]()
$355
This Southwest deal was found by Cheapflights users on 2/22. 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 4/244:10 pm
PHX
- STL
Nonstop2h 55m
Southwest
Mon 4/279:40 pm
STL
- PHX
Nonstop3h 25m
Southwest
Deal found 2/22![Southwest logo]()
$355
This Southwest deal was found by Cheapflights users on 2/23. 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.
Fri 3/275:00 am
PHX
- STL
Nonstop2h 50m
Southwest
Mon 3/305:15 am
STL
- PHX
Nonstop3h 35m
Southwest
Deal found 2/23![Southwest logo]()
$355
This Southwest deal was found by Cheapflights users on 2/22. 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 5/155:15 am
PHX
- STL
Nonstop2h 50m
Southwest
Sun 5/179:55 pm
STL
- PHX
Nonstop3h 25m
Southwest
Deal found 2/22![Southwest logo]()
$355
This Southwest deal was found by Cheapflights users on 2/21. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/92:05 pm
PHX
- STL
1 stop6h 00m
Southwest
Mon 4/136:00 pm
STL
- PHX
Nonstop3h 25m
Southwest
Deal found 2/21![Southwest logo]()
$365
This Southwest deal was found by Cheapflights users on 2/24. 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 2/2812:35 pm
PHX
- STL
1 stop4h 25m
Southwest
Tue 3/33:50 pm
STL
- PHX
1 stop5h 25m
Southwest
Deal found 2/24![Southwest logo]()
$410
Last-minute flights from Mesa to St. LouisDiscover last-minute flight deals from Mesa to St. Louis. Data last updated February 25, 2026 and is based on user searches.
Discover last-minute flight deals from Mesa to St. Louis. Data last updated February 25, 2026 and is based on user searches.
This Super.com deal was found by Cheapflights users on 2/23. 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.
Thu 3/125:09 pm
PHX
- STL
Nonstop2h 53m
Frontier
Mon 3/165:46 pm
STL
- PHX
Nonstop3h 41m
Frontier
Deal found 2/23![Frontier logo]()
$168
This Kiwi.com deal was found by Cheapflights users on 2/23. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/238:27 pm
PHX
- STL
1 stop12h 52m
Frontier
Mon 3/308:12 pm
STL
- PHX
1 stop23h 34m
Frontier
Deal found 2/23![Frontier logo]()
$181
This Kiwi.com deal was found by Cheapflights users on 2/24. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/246:45 pm
PHX
- STL
1 stop13h 04m
Frontier
Tue 3/3111:27 am
STL
- PHX
2 stops29h 06m
Frontier
Deal found 2/24![Frontier logo]()
$174
This Kiwi.com deal was found by Cheapflights users on 2/23. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/265:09 pm
PHX
- STL
Nonstop2h 53m
Frontier
Mon 3/308:12 pm
STL
- PHX
1 stop19h 49m
Frontier
Deal found 2/23![Frontier logo]()
$164
This Kiwi.com deal was found by Cheapflights users on 2/21. 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 3/265:09 pm
PHX
- STL
Nonstop2h 53m
Frontier
Sun 3/2910:49 pm
STL
- PHX
Nonstop3h 41m
Frontier
Deal found 2/21![Frontier logo]()
$166
This Kiwi.com deal was found by Cheapflights users on 2/23. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/279:24 pm
PHX
- STL
1 stop10h 25m
Frontier
Mon 3/308:12 pm
STL
- PHX
1 stop19h 49m
Frontier
Deal found 2/23![Frontier logo]()
$176
This Kiwi.com deal was found by Cheapflights users on 2/22. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/316:45 pm
PHX
- STL
1 stop13h 03m
Frontier
Tue 4/711:21 am
STL
- PHX
2 stops38h 26m
Frontier
Deal found 2/22![Frontier logo]()
$173
One-way flights from Mesa to St. LouisSearch for one-way flight options from Mesa to St. Louis. Find affordable one-way fares based on user searches. Data last updated February 25, 2026.
Search for one-way flight options from Mesa to St. Louis. Find affordable one-way fares based on user searches. Data last updated February 25, 2026.
This Booking.com deal was found by Cheapflights users on 2/22. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/117:25 am
PHX
- STL
Nonstop2h 56m
Frontier
Deal found 2/22![Frontier logo]()
$59
This Kiwi.com deal was found by Cheapflights users on 2/24. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/249:24 pm
PHX
- STL
1 stop20h 08m
Frontier
Deal found 2/24![Frontier logo]()
$65
This Kiwi.com deal was found by Cheapflights users on 2/22. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/246:50 am
PHX
- STL
1 stop24h 59m
Frontier
Deal found 2/22![Frontier logo]()
$72
This Kiwi.com deal was found by Cheapflights users on 2/23. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/259:52 am
PHX
- STL
1 stop7h 40m
Frontier
Deal found 2/23![Frontier logo]()
$80
This Kiwi.com deal was found by Cheapflights users on 2/24. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/228:07 pm
PHX
- STL
1 stop22h 53m
Frontier
Deal found 2/24![Frontier logo]()
$82
This Super.com deal was found by Cheapflights users on 2/23. 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 3/85:09 pm
PHX
- STL
Nonstop2h 53m
Frontier
Deal found 2/23![Frontier logo]()
$83
This Kiwi.com deal was found by Cheapflights users on 2/21. 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.
Sun 5/179:24 pm
PHX
- STL
1 stop19h 48m
Frontier
Deal found 2/21![Frontier logo]()
$85
This Frontier deal was found by Cheapflights users on 2/23. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/205:16 am
PHX
- STL
1 stop7h 20m
Frontier
Deal found 2/23![Frontier logo]()
$95
This Flightnetwork deal was found by Cheapflights users on 2/24. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/1011:33 am
PHX
- STL
1 stop5h 38m
Frontier
Deal found 2/24![Frontier logo]()
$96
Find flight deals from Mesa to St. Louis
Keep the following information in mind while searching for Mesa to St. Louis flight deals. Data was last updated February 25, 2026.
Round-trip from | $132 (Kiwi.com) |
|---|---|
One-way from | $59 (Booking.com) |
Popular in | April |
Cheapest in | January |
Average price | $365 |
Cheapflights Fare Finder
Customize your flight search to find flights from Mesa to St. Louis 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 February 25, 2026.
Use the filters below to find and compare flights from Mesa to St. Louis that are best for you.
Fly from
Fly to
Route
Depart
Return
PhoenixSt. Louis
PHX - STL
PHXSTL
Phoenix Sky Harbor Intl
Wed 4/8
5:35 am-10:25 am
Nonstop2h 50m
Lambert-St Louis
Mon 4/13
6:00 pm-7:25 pm
Nonstop3h 25m
$260
PhoenixSt. Louis
PHX - STL
PHXSTL
Phoenix Sky Harbor Intl
Tue 3/31
5:55 am-10:40 am
Nonstop2h 45m
Lambert-St Louis
Tue 4/7
5:35 pm-7:00 pm
Nonstop3h 25m
$315
PhoenixSt. Louis
PHX - STL
PHXSTL
Phoenix Sky Harbor Intl
Thu 4/16
5:00 am-12:50 pm
1 stop5h 50m
Lambert-St Louis
Sun 4/19
9:55 pm-11:20 pm
Nonstop3h 25m
$333
PhoenixSt. Louis
PHX - STL
PHXSTL
Phoenix Sky Harbor Intl
Thu 4/30
5:15 am-10:05 am
Nonstop2h 50m
Lambert-St Louis
Sun 5/3
5:35 am-7:00 am
Nonstop3h 25m
$355
PhoenixSt. Louis
PHX - STL
PHXSTL
Phoenix Sky Harbor Intl
Fri 4/24
4:10 pm-9:05 pm
Nonstop2h 55m
Lambert-St Louis
Mon 4/27
9:40 pm-11:05 pm
Nonstop3h 25m
$355
PhoenixSt. Louis
PHX - STL
PHXSTL
Phoenix Sky Harbor Intl
Fri 3/27
5:00 am-9:50 am
Nonstop2h 50m
Lambert-St Louis
Mon 3/30
5:15 am-6:50 am
Nonstop3h 35m
$355
PhoenixSt. Louis
PHX - STL
PHXSTL
Phoenix Sky Harbor Intl
Fri 5/15
5:15 am-10:05 am
Nonstop2h 50m
Lambert-St Louis
Sun 5/17
9:55 pm-11:20 pm
Nonstop3h 25m
$355
PhoenixSt. Louis
PHX - STL
PHXSTL
Phoenix Sky Harbor Intl
Thu 4/9
2:05 pm-10:05 pm
1 stop6h 00m
Lambert-St Louis
Mon 4/13
6:00 pm-7:25 pm
Nonstop3h 25m
$365
PhoenixSt. Louis
PHX - STL
PHXSTL
Phoenix Sky Harbor Intl
Thu 4/30
11:30 pm-8:39 am
1 stop7h 09m
Lambert-St Louis
Sun 5/3
7:45 am-1:10 pm
1 stop7h 25m
$375
PhoenixSt. Louis
PHX - STL
PHXSTL
Phoenix Sky Harbor Intl
Sat 2/28
12:35 pm-6:00 pm
1 stop4h 25m
Lambert-St Louis
Tue 3/3
3:50 pm-8:15 pm
1 stop5h 25m
$410
Showing 1-10 of 22 resultsSorted by cheapest first
Best time to book a flight from Mesa to St. Louis
Have a flexible travel schedule? Discover the best time to fly to St. Louis from Mesa with our price prediction graph.
PHX-STL
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 Mesa to St. Louis
MS9-STL
PHX-STL
How far ahead should I book a flight from Mesa to St. Louis?
Use this chart to determine the optimal time to book a round-trip flight from Mesa to St. Louis. Price data was last updated on February 20, 2026.
Booking 25 days in advance of your planned departure date is, on average, the best time to get cheap flights from Mesa to St. Louis. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
What is the cheapest month to book a flight from Mesa to St. Louis?
Currently, January is the cheapest month in which you can book a flight from Mesa to St. Louis (average of $93). Flying from Mesa to St. Louis in April is currently the most expensive (average of $310). 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 MS9 to STL?
Find hourly flight availability from Mesa to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated February 25, 2026.
A simple way to save on the total cost of your ticket is to fly from Mesa to St. Louis in the afternoon. If you’re flexible enough to do this you can expect to save up to 6% on your trip compared to booking a flight in the evening.
What is the cheapest day to fly from Mesa to St. Louis?
Use this chart to determine the cheapest time to fly round-trip from Mesa to St. Louis. Price data was last updated on February 21, 2026.
Travelers seeking maximum savings on their Mesa to St. Louis flight should consider departing on Monday at noon 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.
Weekly flight availability from Mesa to St. Louis
Explore weekly flight availability from Mesa to St. Louis. 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 February 25, 2026.
The most flights from MS9 to STL are scheduled on a Wednesday (10 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (2 on average).
Reviews of airlines servicing St. Louis
Get insights into the airlines that provide service to St. Louis. 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 St. Louis. Reviews last updated February 25, 2026.
Read reviews from past customers who have flown Southwest, Delta, and American Airlines from Mesa to St. Louis. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Overall
8.0
Food
7.0
Boarding
8.1
Comfort
8.0
Crew
8.6
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Overall
8.0
Food
7.0
Boarding
8.1
Comfort
8.0
Crew
8.6
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Overall
8.0
Food
7.0
Boarding
8.1
Comfort
8.0
Crew
8.6
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Overall
8.0
Food
7.0
Boarding
8.1
Comfort
8.0
Crew
8.6
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Overall
8.0
Food
7.0
Boarding
8.1
Comfort
8.0
Crew
8.6
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Related info for your journey
Find useful and relevant information for your journey from Mesa to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near St. Louis?
Book flights to St. Louis if you plan to visit one of these locationsEdwardsville
O'Fallon
Swansea
Fairview Heights
Fenton
Maryland Heights
Collinsville
Eureka
Wentzville
Glencoe
Chesterfield
Alton
Farmington
Festus
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| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$101 | Average$217 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$229 | Average$387 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$236 | Average$346 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$257 | Average$394 | FlexibilityNo cancel fee | On-time63% |