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Mesa

$59+ 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 9/29. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — PHX
Aug 29 — Sep 51
Sat 8/29
Sat 9/5
1 adult, Economy
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Find cheap flights from Ontario to Mesa with Cheapflights

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 September or October, booked 41 days in advance, depart on a Wednesday or Thursday and return on a Saturday

Cheap 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 July 30, 2026.

This Southwest deal was found by Cheapflights users on 7/28. 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.
Tue 8/251:10 pm
ONT
-
PHX
Nonstop1h 25m
Southwest
Tue 8/257:45 pm
PHX
-
ONT
Nonstop1h 10m
Southwest
Deal found 7/28$117
This Frontier deal was found by Cheapflights users on 7/30. 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.
Thu 8/273:40 pm
ONT
-
PHX
1 stop7h 44m
Frontier
Thu 9/34:48 pm
PHX
-
ONT
1 stop7h 02m
Frontier
Deal found 7/30$118
This Frontier deal was found by Cheapflights users on 7/30. 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.
Thu 8/203:40 pm
ONT
-
PHX
1 stop7h 44m
Frontier
Mon 8/2410:30 pm
PHX
-
ONT
1 stop17h 24m
Frontier
Deal found 7/30$119
This deal was found by Cheapflights users on 7/29. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/18:00 am
ONT
-
PHX
1 stop8h 18m
Frontier
Sun 10/48:00 am
PHX
-
ONT
1 stop3h 22m
Frontier
Deal found 7/29$121
This American Airlines deal was found by Cheapflights users on 7/26. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/512:59 pm
ONT
-
PHX
Nonstop1h 26m
American Airlines
Sun 9/66:04 pm
PHX
-
ONT
Nonstop1h 11m
American Airlines
Deal found 7/26$122
This Southwest deal was found by Cheapflights users on 7/28. 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.
Mon 8/248:40 pm
ONT
-
PHX
Nonstop1h 15m
Southwest
Mon 8/316:50 am
PHX
-
ONT
1 stop5h 20m
Southwest
Deal found 7/28$127
This Southwest deal was found by Cheapflights users on 7/27. 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 8/188:35 am
ONT
-
PHX
Nonstop1h 20m
Southwest
Wed 8/197:10 am
PHX
-
ONT
2 stops6h 25m
Southwest
Deal found 7/27$132
This Frontier deal was found by Cheapflights users on 7/30. 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 11/712:57 pm
ONT
-
PHX
1 stop3h 53m
Frontier
Thu 11/127:30 am
PHX
-
ONT
1 stop7h 10m
Frontier
Deal found 7/30$134

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 July 30, 2026.

Most accurate provider

Expedia
1 star

Most trusted provider

Expedia
3 stars

Round-trip from

$117
(Southwest)

One-way from

$59
(American Airlines)

Popular in

July

Cheapest in

September

Average price

$446
Provider with most accurate pricing for Los Angeles-Phoenix flight deals.
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Provider most trusted by Cheapflights users for Los Angeles-Phoenix flights.
Search Deals
From Ontario to Mesa
Search Deals
One-way flight from Ontario to Mesa
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($55 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($15 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals

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 July 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

Price

Cheapest round-trip

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Tue 9/29

1:10 pm-2:35 pm

Nonstop1h 25m

Phoenix Sky Harbor Intl

Wed 9/30

9:00 am-10:25 am

Nonstop1h 25m

$117

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Mon 8/17

8:40 pm-9:55 pm

Nonstop1h 15m

Phoenix Sky Harbor Intl

Tue 8/18

9:45 am-12:40 pm

1 stop2h 55m

$127

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Mon 9/14

5:15 am-6:30 am

Nonstop1h 15m

Phoenix Sky Harbor Intl

Wed 9/16

7:10 am-1:40 pm

2 stops6h 30m

$132

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Fri 9/25

8:40 pm-10:00 pm

Nonstop1h 20m

Phoenix Sky Harbor Intl

Sat 9/26

1:25 pm-8:05 pm

2 stops6h 40m

$177
Quickest round-trip

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Fri 9/4

4:50 pm-6:10 pm

Nonstop1h 20m

Phoenix Sky Harbor Intl

Mon 9/7

8:55 pm-10:05 pm

Nonstop1h 10m

$207

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Mon 9/7

6:08 am-10:26 am

1 stop4h 18m

Phoenix Sky Harbor Intl

Wed 9/9

7:02 am-12:12 pm

1 stop5h 10m

$241

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Thu 8/27

1:56 pm-6:35 pm

1 stop4h 39m

Phoenix Sky Harbor Intl

Mon 8/31

7:02 am-12:12 pm

1 stop5h 10m

$241

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Thu 8/20

6:08 am-10:26 am

1 stop4h 18m

Phoenix Sky Harbor Intl

Mon 8/24

7:02 am-12:12 pm

1 stop5h 10m

$241
Cheapest one-way

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Tue 9/29

6:40 am-8:05 am

Nonstop1h 25m

$59
Quickest one-way

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Tue 10/13

7:20 pm-8:35 pm

Nonstop1h 15m

$59

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

Showing 1-10 of 18 resultsSorted by cheapest first
1
2

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

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 July 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.

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 July 30, 2026.

The most flights from ONT to MS9 are scheduled on a Thursday (10 on average). You will have fewer flight options on Wednesday, 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?

Airfare is below average for this route at the moment.
Ontario to Mesa flights typically cost between $165 and $353 in August.
The cheapest round-trip price found within the last 5 days was $117 on Southwest (Aug 25-Aug 26).

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 July 25, 2026.

Travelers seeking maximum savings on their Ontario to Mesa flight should consider departing on Friday 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.

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 July 30, 2026.
See what other customers who have flown with Southwest,American Airlines, andJetBlue 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
4,227 reviews

Entertainment

7.5

Comfort

8.0

Food

7.0

Crew

8.6

Boarding

8.1

Overall

8.0

Reviews

1 / 20
8.0
Excellent

La Tracimeldamarcos,Jun 2026

LAX - SLC

The second flight was not as comfortable as the first as we had to change planes to what seemed to be a slightly older aircraft. The seats weren’t as comfortable as the other plane. But it wasn’t bad.
Southwest
8.0
Very good
4,227 reviews
Southwest
8.0
Very good
4,227 reviews

Entertainment

7.5

Comfort

8.0

Food

7.0

Crew

8.6

Boarding

8.1

Overall

8.0

Reviews

1 / 20
8.0
Excellent

La Tracimeldamarcos,Jun 2026

LAX - SLC

The second flight was not as comfortable as the first as we had to change planes to what seemed to be a slightly older aircraft. The seats weren’t as comfortable as the other plane. But it wasn’t bad.
American Airlines
7.1
Good
11,842 reviews
Southwest
8.0
Very good
4,227 reviews

Entertainment

7.5

Comfort

8.0

Food

7.0

Crew

8.6

Boarding

8.1

Overall

8.0

Reviews

1 / 20
8.0
Excellent

La Tracimeldamarcos,Jun 2026

LAX - SLC

The second flight was not as comfortable as the first as we had to change planes to what seemed to be a slightly older aircraft. The seats weren’t as comfortable as the other plane. But it wasn’t bad.
JetBlue
7.1
Good
3,028 reviews
Southwest
8.0
Very good
4,227 reviews

Entertainment

7.5

Comfort

8.0

Food

7.0

Crew

8.6

Boarding

8.1

Overall

8.0

Reviews

1 / 20
8.0
Excellent

La Tracimeldamarcos,Jun 2026

LAX - SLC

The second flight was not as comfortable as the first as we had to change planes to what seemed to be a slightly older aircraft. The seats weren’t as comfortable as the other plane. But it wasn’t bad.
Frontier
5.6
Fair
2,747 reviews
Southwest
8.0
Very good
4,227 reviews

Entertainment

7.5

Comfort

8.0

Food

7.0

Crew

8.6

Boarding

8.1

Overall

8.0

Reviews

1 / 20
8.0
Excellent

La Tracimeldamarcos,Jun 2026

LAX - SLC

The second flight was not as comfortable as the first as we had to change planes to what seemed to be a slightly older aircraft. The seats weren’t as comfortable as the other plane. But it wasn’t bad.

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 5 outbound flights to Mesa per day. You should also have plenty of airline options to choose from since 4 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 25m. Southwest provides one of the quickest options available for as low as $117. Airlines will cover a distance of 324 mi. Generally, flights for this route are nonstop.

  • What are the cheapest airlines to fly from Ontario to Mesa one-way?

    $48 is the cheapest one-way deal found within the past few days, from Southwest. You may also be able to find cheap deals on American Airlines and Frontier, with prices starting from $58 and $69, respectively.

  • 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: Porter Airlines (94%), American Airlines (87%), Envoy Air (80%).

  • What are the cheapest flights from Ontario to Mesa?

    While on average a flight from Ontario to Mesa is generally $841, our data shows the cheapest flight currently is $129. When looking at the most popular route, (Ontario - Phoenix Sky Harbor Intl), you can expect to pay $117 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.

See more FAQs

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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 July 30, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$72Average$162FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$114Average$276FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$127Average$302FlexibilityNo cancel feeOn-time71%
JetBlueCheapest$228Average$322FlexibilityNo cancel feeOn-time62%

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