$57+ Cheap flights from Ontario (ONT) 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 5/20. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — PHX
May 30 — Jun 61
Round-trip
1 adult, Economy
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Find cheap flights from Ontario 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 Ontario to Mesa are usually found in September or August, booked 73 days in advance, depart on a Wednesday or Thursday and return on a Tuesday
Cheap flight deals from Ontario to Mesa
Cheapest
Best
Last-minute
One-way
Cheapest flights from Ontario to MesaExplore the most affordable flight options available from Ontario to Mesa. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 30, 2026.
Explore the most affordable flight options available from Ontario to Mesa. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 30, 2026.
This Southwest deal was found by Cheapflights users on 4/25. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/97:20 pm
ONT
- PHX
Nonstop1h 15m
Southwest
Wed 6/106:50 pm
PHX
- ONT
Nonstop1h 10m
Southwest
Deal found 4/25![Southwest logo]()
$137
This Frontier deal was found by Cheapflights users on 4/25. 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.
Sat 5/1610:50 am
ONT
- PHX
1 stop5h 05m
Frontier
Tue 5/197:40 am
PHX
- ONT
1 stop8h 04m
Frontier
Deal found 4/25![Frontier logo]()
$140
This Frontier deal was found by Cheapflights users on 4/26. 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.
Tue 5/196:00 am
ONT
- PHX
1 stop9h 23m
Frontier
Tue 5/2610:27 pm
PHX
- ONT
1 stop9h 37m
Frontier
Deal found 4/26![Frontier logo]()
$141
This Frontier deal was found by Cheapflights users on 4/25. 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.
Sat 5/164:04 pm
ONT
- PHX
1 stop16h 43m
Frontier
Mon 5/1810:27 pm
PHX
- ONT
1 stop17h 17m
Frontier
Deal found 4/25![Frontier logo]()
$142
This Kiwi.com deal was found by Cheapflights users on 4/25. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/164:04 pm
ONT
- PHX
1 stop7h 20m
Frontier
Sat 5/307:40 am
PHX
- ONT
1 stop7h 29m
Frontier
Deal found 4/25![Frontier logo]()
$143
This Expedia deal was found by Cheapflights users on 4/26. 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.
Mon 5/1811:36 am
ONT
- PHX
1 stop23h 47m
Frontier
Tue 5/196:51 pm
PHX
- ONT
1 stop4h 58m
Frontier
Deal found 4/26![Frontier logo]()
$146
This Southwest deal was found by Cheapflights users on 4/27. 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 6/210:30 am
ONT
- PHX
Nonstop1h 15m
Southwest
Wed 6/107:35 pm
PHX
- ONT
1 stop3h 10m
Southwest
Deal found 4/27![Southwest logo]()
$147
This Kiwi.com deal was found by Cheapflights users on 4/29. 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 5/196:00 am
ONT
- PHX
2 stops11h 59m
Frontier
Wed 5/2010:27 pm
PHX
- ONT
1 stop9h 37m
Frontier
Deal found 4/29![Frontier logo]()
$148
This Kiwi.com deal was found by Cheapflights users on 4/24. 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.
Mon 5/1811:36 am
ONT
- PHX
2 stops25h 44m
Frontier
Mon 5/2510:27 pm
PHX
- ONT
1 stop9h 37m
Frontier
Deal found 4/24![Frontier logo]()
$149
This CheapOair deal was found by Cheapflights users on 4/27. 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.
Mon 5/1811:36 am
ONT
- PHX
1 stop23h 47m
Frontier
Sat 5/2310:27 pm
PHX
- ONT
1 stop9h 37m
Frontier
Deal found 4/27![Frontier logo]()
$152
Best flights from Ontario to MesaDiscover carefully curated flight deals from Ontario to Mesa that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 30, 2026.
Discover carefully curated flight deals from Ontario to Mesa that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 30, 2026.
This Southwest deal was found by Cheapflights users on 4/25. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/235:40 am
ONT
- PHX
Nonstop1h 15m
Southwest
Sat 5/301:55 pm
PHX
- ONT
1 stop3h 45m
Southwest
Deal found 4/25![Southwest logo]()
$187
This KAYAK deal was found by Cheapflights users on 4/29. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/151:11 pm
ONT
- PHX
Nonstop1h 23m
American Airlines
Tue 6/168:43 pm
PHX
- ONT
Nonstop1h 14m
American Airlines
Deal found 4/29![American Airlines logo]()
$361
This Southwest deal was found by Cheapflights users on 4/26. 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 5/262:25 pm
ONT
- PHX
Nonstop1h 15m
Southwest
Wed 5/278:30 am
PHX
- ONT
1 stop3h 05m
Southwest
Deal found 4/26![Southwest logo]()
$224
This Southwest deal was found by Cheapflights users on 4/25. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/162:50 pm
ONT
- PHX
Nonstop1h 20m
Southwest
Sun 5/176:00 am
PHX
- ONT
1 stop5h 30m
Southwest
Deal found 4/25![Southwest logo]()
$284
This Southwest deal was found by Cheapflights users on 4/25. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/231:20 pm
ONT
- PHX
1 stop7h 50m
Southwest
Sun 5/242:30 pm
PHX
- ONT
2 stops6h 20m
Southwest
Deal found 4/25![Southwest logo]()
$299
This Southwest deal was found by Cheapflights users on 4/29. 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 5/183:55 pm
ONT
- PHX
2 stops5h 20m
Southwest
Thu 5/217:30 am
PHX
- ONT
Nonstop1h 15m
Southwest
Deal found 4/29![Southwest logo]()
$310
This Southwest deal was found by Cheapflights users on 4/29. 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 5/293:00 pm
ONT
- PHX
Nonstop1h 20m
Southwest
Sun 5/316:00 am
PHX
- ONT
1 stop5h 30m
Southwest
Deal found 4/29![Southwest logo]()
$329
This Southwest deal was found by Cheapflights users on 4/29. 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 5/223:55 pm
ONT
- PHX
2 stops5h 20m
Southwest
Sun 5/243:25 pm
PHX
- ONT
1 stop4h 00m
Southwest
Deal found 4/29![Southwest logo]()
$360
This Southwest deal was found by Cheapflights users on 4/25. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/194:00 pm
ONT
- PHX
2 stops5h 15m
Southwest
Sun 6/216:35 am
PHX
- ONT
1 stop5h 45m
Southwest
Deal found 4/25![Southwest logo]()
$372
This Southwest deal was found by Cheapflights users on 4/28. 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 6/254:00 pm
ONT
- PHX
2 stops5h 15m
Southwest
Mon 6/2911:40 am
PHX
- ONT
2 stops5h 55m
Southwest
Deal found 4/28![Southwest logo]()
$377
Last-minute flights from Ontario to MesaDiscover last-minute flight deals from Ontario to Mesa. Data last updated April 30, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Mesa. Data last updated April 30, 2026 and is based on user searches.
This Frontier deal was found by Cheapflights users on 4/25. 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.
Sat 5/1610:50 am
ONT
- PHX
1 stop5h 05m
Frontier
Tue 5/197:40 am
PHX
- ONT
1 stop8h 04m
Frontier
Deal found 4/25![Frontier logo]()
$140
This Frontier deal was found by Cheapflights users on 4/25. 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.
Sat 5/164:04 pm
ONT
- PHX
1 stop16h 43m
Frontier
Mon 5/1810:27 pm
PHX
- ONT
1 stop17h 17m
Frontier
Deal found 4/25![Frontier logo]()
$142
This Kiwi.com deal was found by Cheapflights users on 4/25. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/164:04 pm
ONT
- PHX
1 stop7h 20m
Frontier
Sat 5/307:40 am
PHX
- ONT
1 stop7h 29m
Frontier
Deal found 4/25![Frontier logo]()
$143
This Expedia deal was found by Cheapflights users on 4/26. 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.
Mon 5/1811:36 am
ONT
- PHX
1 stop23h 47m
Frontier
Tue 5/196:51 pm
PHX
- ONT
1 stop4h 58m
Frontier
Deal found 4/26![Frontier logo]()
$146
This Kiwi.com deal was found by Cheapflights users on 4/24. 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.
Mon 5/1811:36 am
ONT
- PHX
2 stops25h 44m
Frontier
Mon 5/2510:27 pm
PHX
- ONT
1 stop9h 37m
Frontier
Deal found 4/24![Frontier logo]()
$149
This CheapOair deal was found by Cheapflights users on 4/27. 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.
Mon 5/1811:36 am
ONT
- PHX
1 stop23h 47m
Frontier
Sat 5/2310:27 pm
PHX
- ONT
1 stop9h 37m
Frontier
Deal found 4/27![Frontier logo]()
$152
This Frontier deal was found by Cheapflights users on 4/26. 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.
Tue 5/196:00 am
ONT
- PHX
1 stop9h 23m
Frontier
Tue 5/2610:27 pm
PHX
- ONT
1 stop9h 37m
Frontier
Deal found 4/26![Frontier logo]()
$141
This Kiwi.com deal was found by Cheapflights users on 4/29. 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 5/196:00 am
ONT
- PHX
2 stops11h 59m
Frontier
Wed 5/2010:27 pm
PHX
- ONT
1 stop9h 37m
Frontier
Deal found 4/29![Frontier logo]()
$148
This Kiwi.com deal was found by Cheapflights users on 4/28. 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 5/196:00 am
ONT
- PHX
2 stops11h 59m
Frontier
Mon 5/2510:27 pm
PHX
- ONT
1 stop9h 37m
Frontier
Deal found 4/28![Frontier logo]()
$155
This American Airlines deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/276:10 am
ONT
- PHX
Nonstop1h 25m
American Airlines
Wed 6/310:45 am
PHX
- ONT
Nonstop1h 20m
American Airlines
Deal found 4/29![American Airlines logo]()
$137
One-way flights from Ontario to MesaSearch for one-way flight options from Ontario to Mesa. Find affordable one-way fares based on user searches. Data last updated April 30, 2026.
Search for one-way flight options from Ontario to Mesa. Find affordable one-way fares based on user searches. Data last updated April 30, 2026.
This WAYA deal was found by Cheapflights users on 4/28. 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 WAYA is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/204:39 pm
ONT
- PHX
1 stop6h 45m
Frontier
Deal found 4/28![Frontier logo]()
$57
This Kiwi.com deal was found by Cheapflights users on 4/27. 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 6/171:33 pm
ONT
- PHX
1 stop9h 27m
Frontier
Deal found 4/27![Frontier logo]()
$58
This Kiwi.com deal was found by Cheapflights users on 4/29. 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 5/253:30 pm
ONT
- PHX
1 stop19h 53m
Frontier
Deal found 4/29![Frontier logo]()
$59
This Kiwi.com deal was found by Cheapflights users on 4/25. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/264:39 pm
ONT
- PHX
1 stop6h 45m
Frontier
Deal found 4/25![Frontier logo]()
$65
This Kiwi.com deal was found by Cheapflights users on 4/27. 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 5/213:30 pm
ONT
- PHX
1 stop7h 54m
Frontier
Deal found 4/27![Frontier logo]()
$66
This American Airlines deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/261:10 pm
ONT
- PHX
Nonstop1h 24m
American Airlines
Deal found 4/29![American Airlines logo]()
$69
This Kiwi.com deal was found by Cheapflights users on 4/27. 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 5/174:04 pm
ONT
- PHX
1 stop16h 43m
Frontier
Deal found 4/27![Frontier logo]()
$72
This Super.com deal was found by Cheapflights users on 4/26. 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 5/246:00 am
ONT
- PHX
1 stop17h 29m
Frontier
Deal found 4/26![Frontier logo]()
$75
This Southwest deal was found by Cheapflights users on 4/27. 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 7/16:35 pm
ONT
- PHX
1 stop3h 05m
Southwest
Deal found 4/27![Southwest logo]()
$79
This Kiwi.com deal was found by Cheapflights users on 4/27. 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 5/233:30 pm
ONT
- PHX
1 stop7h 54m
Frontier
Deal found 4/27![Frontier logo]()
$87
This Super.com deal was found by Cheapflights users on 4/29. 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 5/169:15 am
ONT
- PHX
1 stop9h 20m
Frontier
Deal found 4/29![Frontier logo]()
$89
Find flight deals from Ontario to Mesa
Keep the following information in mind while searching for Ontario to Mesa flight deals. Data was last updated April 30, 2026.
Round-trip from | $137 (Southwest) |
|---|---|
One-way from | $57 (WAYA) |
Popular in | February |
Cheapest in | September |
Average price | $267 |
Cheapflights Fare Finder
Customize your flight search to find flights from Ontario 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 April 30, 2026.
Use the filters below to find and compare flights from Ontario to Mesa that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
OntarioPhoenix
ONT - PHX
ONTPHX
Ontario
Sat 5/23
5:40 am-6:55 am
Nonstop1h 15m
Phoenix Sky Harbor Intl
Sat 5/30
1:55 pm-5:40 pm
1 stop3h 45m
$187
OntarioPhoenix
ONT - PHX
ONTPHX
Ontario
Tue 5/26
2:25 pm-3:40 pm
Nonstop1h 15m
Phoenix Sky Harbor Intl
Wed 5/27
8:30 am-11:35 am
1 stop3h 05m
$224
OntarioPhoenix
ONT - PHX
ONTPHX
Ontario
Sat 5/16
2:50 pm-4:10 pm
Nonstop1h 20m
Phoenix Sky Harbor Intl
Sun 5/17
6:00 am-11:30 am
1 stop5h 30m
$284
OntarioPhoenix
ONT - PHX
ONTPHX
Ontario
Sat 5/23
1:20 pm-9:10 pm
1 stop7h 50m
Phoenix Sky Harbor Intl
Sun 5/24
2:30 pm-8:50 pm
2 stops6h 20m
$299
OntarioPhoenix
ONT - PHX
ONTPHX
Ontario
Mon 5/18
3:55 pm-9:15 pm
2 stops5h 20m
Phoenix Sky Harbor Intl
Thu 5/21
7:30 am-8:45 am
Nonstop1h 15m
$310
OntarioPhoenix
ONT - PHX
ONTPHX
Ontario
Fri 5/29
3:00 pm-4:20 pm
Nonstop1h 20m
Phoenix Sky Harbor Intl
Sun 5/31
6:00 am-11:30 am
1 stop5h 30m
$329
OntarioPhoenix
ONT - PHX
ONTPHX
Ontario
Fri 5/22
3:55 pm-9:15 pm
2 stops5h 20m
Phoenix Sky Harbor Intl
Sun 5/24
3:25 pm-7:25 pm
1 stop4h 00m
$360
Quickest round-trip
OntarioPhoenix
ONT - PHX
ONTPHX
Ontario
Mon 6/15
1:11 pm-2:34 pm
Nonstop1h 23m
Phoenix Sky Harbor Intl
Tue 6/16
8:43 pm-9:57 pm
Nonstop1h 14m
$361
OntarioPhoenix
ONT - PHX
ONTPHX
Ontario
Fri 6/19
4:00 pm-9:15 pm
2 stops5h 15m
Phoenix Sky Harbor Intl
Sun 6/21
6:35 am-12:20 pm
1 stop5h 45m
$372
OntarioPhoenix
ONT - PHX
ONTPHX
Ontario
Thu 6/25
4:00 pm-9:15 pm
2 stops5h 15m
Phoenix Sky Harbor Intl
Mon 6/29
11:40 am-5:35 pm
2 stops5h 55m
$377
Showing 1-10 of 21 resultsSorted by cheapest first
Best time to book a flight from Ontario to Mesa
Have a flexible travel schedule? Discover the best time to fly to Mesa from Ontario with our price prediction graph.
ONT-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 Ontario to Mesa
ONT-MS9
ONT-PHX
What is the cheapest time of day to fly from ONT to MS9?
Find hourly flight availability from Ontario 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 April 30, 2026.
It’s typically best to fly out from Ontario to Mesa at noon. Doing so could potentially save you 16% on the flight price compared to flying in the evening, which is usually more expensive.
What is the cheapest day to fly from Ontario to Mesa?
Use this chart to determine the cheapest time to fly round-trip from Ontario to Mesa. Price data was last updated on April 25, 2026.
Travelers seeking maximum savings on their Ontario to Mesa flight should consider departing on Saturday 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 Ontario to Mesa
Explore weekly flight availability from Ontario 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 April 30, 2026.
The most flights from ONT to MS9 are scheduled on a Wednesday (12 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (2 on average).
How much does it cost to fly round-trip from Ontario to Mesa?
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 April 30, 2026.
See what other customers who have flown with Southwest,JetBlue, andAmerican Airlines from Ontario to Mesa have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Comfort
8.0
Boarding
8.1
Entertainment
7.5
Overall
8.0
Food
7.0
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Comfort
8.0
Boarding
8.1
Entertainment
7.5
Overall
8.0
Food
7.0
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Comfort
8.0
Boarding
8.1
Entertainment
7.5
Overall
8.0
Food
7.0
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Comfort
8.0
Boarding
8.1
Entertainment
7.5
Overall
8.0
Food
7.0
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Comfort
8.0
Boarding
8.1
Entertainment
7.5
Overall
8.0
Food
7.0
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Related info for your journey
Find useful and relevant information for your journey from Ontario 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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Ontario and Mesa flights
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Ontario to Mesa flights
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Top 4 airlines flying from Ontario to Mesa
Discover the top 4 airlines that operate flights from Ontario 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 April 30, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$79 | Average$166 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$112 | Average$265 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$124 | Average$304 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$228 | Average$308 | FlexibilityNo cancel fee | On-time62% |