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Mesa

$63+ 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 1/20. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — PHX
oct. 11 — oct. 181
sáb. 10/11
sáb. 10/18
1 adult, Economy
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1. Tell us where you want to go

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Cheapflights Tip: The best prices from Ontario to Mesa are usually found in August or September, booked 75 days in advance, depart on a Wednesday or Friday and return on a Saturday

Cheap flight deals from Ontario to Mesa

Keep the following information in mind while searching for Ontario to Mesa flight deals. Data was last updated septiembre 11, 2025.

Round-trip from

$131
(Southwest)

One-way from

$63
(Southwest)

Popular in

July

Cheapest in

August

Average price

$208
From Ontario to Mesa
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One-way flight from Ontario to Mesa
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Highest demand for flights based on searches. 2% potential increase in price ($6 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($5 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Ontario to Mesa

Cheapest flights from Ontario to Mesa
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 septiembre 11, 2025.

This Southwest deal was found by Cheapflights users on 9/10. 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.
mar. 10/77:15 pmONT - PHX
Nonstop1h 20mSouthwest
mar. 10/148:35 amPHX - ONT
Nonstop1h 20mSouthwest
Deal found 9/10$131
This Kiwi.com deal was found by Cheapflights users on 9/10. 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.
mié. 10/18:59 pmONT - PHX
1 stop10h 33mFrontier
mié. 10/84:14 pmPHX - ONT
1 stop7h 36mFrontier
Deal found 9/10$137
This Kiwi.com deal was found by Cheapflights users on 9/10. 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.
mié. 10/86:53 amONT - PHX
1 stop8h 11mFrontier
mié. 10/157:30 pmPHX - ONT
1 stop28h 20mFrontier
Deal found 9/10$139
This Kiwi.com deal was found by Cheapflights users on 9/11. 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.
dom. 9/287:30 pmONT - PHX
1 stop3h 12mFrontier
dom. 10/57:40 amPHX - ONT
1 stop7h 44mFrontier
Deal found 9/11$143
This CheapOair deal was found by Cheapflights users on 9/10. 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.
vie. 9/194:08 pmONT - PHX
1 stop7h 49mFrontier
lun. 9/2210:31 amPHX - ONT
1 stop3h 29mFrontier
Deal found 9/10$144
This CheapOair deal was found by Cheapflights users on 9/10. 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.
jue. 10/96:54 pmONT - PHX
1 stop4h 47mFrontier
dom. 10/125:45 amPHX - ONT
1 stop6h 09mFrontier
Deal found 9/10$145
This Kiwi.com deal was found by Cheapflights users on 9/10. 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.
mié. 10/86:53 amONT - PHX
1 stop8h 11mFrontier
jue. 10/94:55 pmPHX - ONT
1 stop7h 12mFrontier
Deal found 9/10$146
This Booking.com deal was found by Cheapflights users on 9/11. 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.
dom. 10/126:44 pmONT - PHX
1 stop4h 57mFrontier
lun. 10/135:45 amPHX - ONT
1 stop6h 02mFrontier
Deal found 9/11$148
This Frontier deal was found by Cheapflights users on 9/10. 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.
sáb. 10/118:00 amONT - PHX
1 stop4h 23mFrontier
sáb. 10/114:14 pmPHX - ONT
1 stop7h 36mFrontier
Deal found 9/10$149
This CheapOair deal was found by Cheapflights users on 9/10. 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.
mar. 9/238:00 amONT - PHX
1 stop14h 21mFrontier
mié. 10/84:14 pmPHX - ONT
1 stop7h 36mFrontier
Deal found 9/10$150
This CheapOair deal was found by Cheapflights users on 9/10. 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.
jue. 9/118:59 pmONT - PHX
1 stop10h 33mFrontier
lun. 9/2210:31 amPHX - ONT
1 stop3h 29mFrontier
Deal found 9/10$151

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 septiembre 11, 2025.
Use the filters below to find and compare flights from Ontario to Mesa that are best for you.

Fly from

Ontario

Fly to

Mesa

Route

Depart

Return

Price

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

mar. 10/7

8:50 am-10:05 am

Nonstop1h 15m

Phoenix Sky Harbor Intl

mié. 10/8

8:35 am-9:55 am

Nonstop1h 20m

$131

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

mar. 10/7

4:35 pm-10:05 pm

1 stop5h 30m

Phoenix Sky Harbor Intl

mar. 10/14

11:05 am-12:20 pm

Nonstop1h 15m

$141

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

mié. 10/8

2:20 pm-3:40 pm

Nonstop1h 20m

Phoenix Sky Harbor Intl

jue. 10/9

7:40 am-9:00 am

Nonstop1h 20m

$151

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

jue. 10/16

3:00 pm-4:20 pm

Nonstop1h 20m

Phoenix Sky Harbor Intl

mar. 10/21

8:55 pm-10:05 pm

Nonstop1h 10m

$151

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

sáb. 10/11

1:37 pm-11:41 pm

1 stop10h 04m

Phoenix Sky Harbor Intl

dom. 10/12

5:45 am-11:54 am

1 stop6h 09m

$155

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

sáb. 10/11

10:09 am-11:30 am

Nonstop1h 21m

Phoenix Sky Harbor Intl

lun. 10/13

8:03 am-9:19 am

Nonstop1h 16m

$156

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

jue. 11/13

8:25 pm-10:45 pm

Nonstop1h 20m

Phoenix Sky Harbor Intl

lun. 11/17

8:45 pm-8:55 pm

Nonstop1h 10m

$157

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

lun. 10/6

5:55 pm-7:15 pm

Nonstop1h 20m

Phoenix Sky Harbor Intl

lun. 10/13

7:50 pm-9:00 pm

Nonstop1h 10m

$164

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

vie. 10/24

4:49 pm-6:07 pm

Nonstop1h 18m

Phoenix Sky Harbor Intl

vie. 10/31

2:10 pm-3:24 pm

Nonstop1h 14m

$172

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

mar. 10/21

6:40 am-7:55 am

Nonstop1h 15m

$66

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Showing 1-10 of 19 results
1
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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.
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

How far ahead should I book a flight from Ontario to Mesa?

Use this chart to determine the optimal time to book a round-trip flight from Ontario to Mesa. Price data was last updated on August 29, 2025.

Booking 75 days in advance of your planned departure date is, on average, the best time to get cheap flights from Ontario to Mesa. 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 Ontario to Mesa?

Currently, January is the cheapest month in which you can book a flight from Ontario to Mesa (average of $258). Flying from Ontario to Mesa in March is currently the most expensive (average of $337). 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 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 septiembre 11, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ontario to Mesa as you normally would.

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 December 16, 2024.

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 at noon 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 septiembre 11, 2025.

The most flights from ONT to MS9 are scheduled on a Thursday (10 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (1 on average).

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 septiembre 11, 2025.
See what other customers who have flown with Southwest, American Airlines, and Frontier 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.
Southwest
8.0
Very good
4,248 reviews

Crew

8.6

Boarding

8.1

Entertainment

7.5

Overall

8.0

Food

7.0

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Southwest
8.0
Very good
4,248 reviews
Southwest
8.0
Very good
4,248 reviews

Crew

8.6

Boarding

8.1

Entertainment

7.5

Overall

8.0

Food

7.0

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,248 reviews

Crew

8.6

Boarding

8.1

Entertainment

7.5

Overall

8.0

Food

7.0

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Frontier
5.8
Fair
3,177 reviews
Southwest
8.0
Very good
4,248 reviews

Crew

8.6

Boarding

8.1

Entertainment

7.5

Overall

8.0

Food

7.0

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.

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.

  • What airport do you fly from for flights from Ontario to Mesa?

    Ontario (ONT) is the airport you will fly out of if you book a flight from Ontario to Mesa. You should not have trouble finding flights to Mesa from Ontario; the airport handles an average of 7 outbound flights to Mesa per day. You should also have plenty of airline options to choose from since 3 airlines have flights from the Ontario airport to Mesa. It is only a 3.1 mi journey to Ontario (ONT) from Ontario’s city center.

  • How long is the flight from Ontario to Mesa?

    A quick flight from Ontario to Mesa can take about 1h 15m. Southwest provides one of the quickest options available for as low as $131. Airlines will cover a distance of 324 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the most reliable airlines from Ontario to Mesa?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Ontario to Mesa on time: Southwest (85%), SkyWest Airlines (83%), British Airways (76%).

  • What are the cheapest flights from Ontario to Mesa?

    While on average a flight from Ontario to Mesa is generally $756, our data shows the cheapest flight currently is $48. When looking at the most popular route, (Ontario - Phoenix Sky Harbor Intl), you can expect to pay $131 for that flight.

  • Can I find deals for flights from Ontario to Mesa that include hotel bookings?

    Yes. In addition to deals on Ontario to Mesa flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Mesa?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Mesa.

  • Can I find deals for business class flights from Ontario to Mesa?

    Yes. Cheapflights offers flight deals from Ontario to Mesa by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Ontario to Mesa?

    Currently, January is the cheapest month in which you can book a flight from Ontario to Mesa (average of $258). Flying from Ontario to Mesa in March is currently the most expensive (average of $337). 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.

See more FAQs

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Top 3 airlines flying from Ontario to Mesa

Discover the top 3 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 septiembre 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$63Average$161FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$107Average$261FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$127Average$290FlexibilityNo cancel feeOn-time71%

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