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Ontario

$55+ Cheap flights from Mesa, AZ to Ontario (ONT)

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 4/10. Fares are subject to change and may not be available on all flights or dates of travel.
PHX — ONT
Feb 27 — Mar 61
Thu 2/27
Thu 3/6
1 adult, Economy
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Find cheap flights from Mesa to Ontario with Cheapflights

1. Tell us where you want to go
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The best prices from Mesa to Ontario are usually found in June or July, booked 70 days in advance, depart on a Wednesday or Saturday and return on a Friday

Cheap flight deals from Mesa to Ontario

Keep the following information in mind while searching for Mesa to Ontario flight deals. Data was last updated February 22, 2025.

Round-trip from

$107
(Cheapflightsfares)

One-way from

$55
(Frontier)

Popular in

December

Cheapest in

June

Average price

$188
From Mesa to Ontario
Search Deals
One-way flight from Mesa to Ontario
Search Deals
Highest demand for flights based on searches. 33% potential increase in price ($86 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2025
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Find flight deals from Mesa to Ontario

Cheapest flights from Mesa to Ontario
Explore the most affordable flight options available from Mesa to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 22, 2025.

This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/82:33 pmPHX - ONT
1 stop3h 12mFrontier
Sat 5/108:24 amONT - PHX
1 stop4h 48mFrontier
Deal found 2/21$107
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/235:09 pmPHX - ONT
Nonstop1h 11mAmerican Airlines
Tue 4/297:25 pmONT - PHX
Nonstop1h 17mAmerican Airlines
Deal found 2/21$117
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.
Tue 3/116:00 pmPHX - ONT
Nonstop1h 15mSouthwest
Fri 3/144:40 pmONT - PHX
Nonstop1h 15mSouthwest
Deal found 2/21$132
This Alaska 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/239:00 amPHX - ONT
2 stops11h 29mAlaska Airlines
Tue 4/296:00 amONT - PHX
1 stop14h 59mAlaska Airlines
Deal found 2/21$248
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/62:38 pmPHX - ONT
2 stops10h 20mMultiple Airlines
Wed 3/1212:59 amONT - PHX
1 stop6h 31mMultiple Airlines
Deal found 2/21$266
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.
Mon 4/76:50 pmPHX - ONT
2 stops16h 15mUnited Airlines
Thu 4/103:55 pmONT - PHX
2 stops16h 50mUnited Airlines
Deal found 2/21$512

Find flights from Mesa to Ontario within your budget

Customize your flight search to find flights from Mesa to Ontario 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 22, 2025.

Fly from

Mesa

Fly to

Ontario

Route

Depart

Return

Price

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Thu 5/8

2:33 pm-5:45 pm

1 stop3h 12m

Ontario

Sat 5/10

8:24 am-1:12 pm

1 stop4h 48m

$107

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Wed 4/23

5:09 pm-6:20 pm

Nonstop1h 11m

Ontario

Tue 4/29

7:25 pm-8:42 pm

Nonstop1h 17m

$117

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Tue 3/11

6:00 pm-7:15 pm

Nonstop1h 15m

Ontario

Fri 3/14

4:40 pm-5:55 pm

Nonstop1h 15m

$132

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Wed 4/23

9:00 am-8:29 pm

2 stops11h 29m

Ontario

Tue 4/29

6:00 am-8:59 pm

1 stop14h 59m

$248

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Thu 3/6

2:38 pm-11:58 pm

2 stops10h 20m

Ontario

Wed 3/12

12:59 am-7:30 am

1 stop6h 31m

$266

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Mon 4/7

6:50 pm-11:05 am

2 stops16h 15m

Ontario

Thu 4/10

3:55 pm-8:45 am

2 stops16h 50m

$512

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Thu 4/10

5:40 am-2:12 pm

1 stop8h 32m

$55

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Thu 4/10

7:43 am-8:59 am

Nonstop1h 16m

$59

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Thu 5/15

4:00 pm-9:10 pm

1 stop5h 10m

$69

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Thu 4/24

6:00 am-11:59 pm

1 stop17h 59m

$127

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/22

Showing 1-10 of 12 results
1
2

Best time to book a flight from Mesa to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Mesa 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.

Travel insights for flights from Mesa to Ontario

Get recent, data-driven insights about flights from Mesa to Ontario including ideal travel times, pricing trends, and more.

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

Use this chart to determine the optimal time to book a round-trip flight from Mesa to Ontario. Price data was last updated on February 14, 2025.

The best time to book flights from Mesa to Ontario is 70 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, August is the cheapest month in which you can book a flight from Mesa to Ontario (average of $246). Flying from Mesa to Ontario in March is currently the most expensive (average of $315). 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 ONT?

Find hourly flight availability from Mesa to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated February 22, 2025.

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

What is the cheapest day to fly from Mesa to Ontario?

Use this chart to determine the cheapest time to fly round-trip from Mesa to Ontario. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Mesa to Ontario flight should consider departing on Tuesday at noon when fares are most often at their lowest. Monday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Mesa to Ontario

Explore weekly flight availability from Mesa to Ontario. 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 22, 2025.

The most flights from MS9 to ONT are scheduled on a Thursday (16 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (3 on average).

Rainfall in Ontario by month

Plan your trip to Ontario by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Ontario ranges from 0.1 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. June is typically the driest time to visit Ontario when rainfall is around 0.1 in.

Temperature in Ontario by month

Plan your trip to Ontario by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 53.6 F).

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated February 22, 2025.
To help decide which airline to fly from Mesa to Ontario, see what other customers have to say about Southwest, Alaska Airlines and Delta. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,395 reviews

Boarding

8.2

Entertainment

7.6

Crew

8.7

Overall

8.1

Comfort

8.1

Food

7.1

Reviews

1 / 20

8.0
Excellent

Christine,Aug 2024

DEN - LGB

No issues. I needed pre boarding and I was able to get it without issue

Southwest
8.1
Very good
4,395 reviews
Southwest
8.1
Very good
4,395 reviews

Boarding

8.2

Entertainment

7.6

Crew

8.7

Overall

8.1

Comfort

8.1

Food

7.1

Reviews

1 / 20

8.0
Excellent

Christine,Aug 2024

DEN - LGB

No issues. I needed pre boarding and I was able to get it without issue

Alaska Airlines
8.0
Very good
9,700 reviews
Southwest
8.1
Very good
4,395 reviews

Boarding

8.2

Entertainment

7.6

Crew

8.7

Overall

8.1

Comfort

8.1

Food

7.1

Reviews

1 / 20

8.0
Excellent

Christine,Aug 2024

DEN - LGB

No issues. I needed pre boarding and I was able to get it without issue

Delta
8.0
Very good
8,203 reviews
Southwest
8.1
Very good
4,395 reviews

Boarding

8.2

Entertainment

7.6

Crew

8.7

Overall

8.1

Comfort

8.1

Food

7.1

Reviews

1 / 20

8.0
Excellent

Christine,Aug 2024

DEN - LGB

No issues. I needed pre boarding and I was able to get it without issue

United Airlines
7.4
Good
8,754 reviews
Southwest
8.1
Very good
4,395 reviews

Boarding

8.2

Entertainment

7.6

Crew

8.7

Overall

8.1

Comfort

8.1

Food

7.1

Reviews

1 / 20

8.0
Excellent

Christine,Aug 2024

DEN - LGB

No issues. I needed pre boarding and I was able to get it without issue

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
4,395 reviews

Boarding

8.2

Entertainment

7.6

Crew

8.7

Overall

8.1

Comfort

8.1

Food

7.1

Reviews

1 / 20

8.0
Excellent

Christine,Aug 2024

DEN - LGB

No issues. I needed pre boarding and I was able to get it without issue

Related info for your journey

Find useful and relevant information for your journey from Mesa to Ontario. 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 into for flights to Ontario from Mesa?

    Most people fly into Ontario (ONT) if they book a flight to Ontario from Mesa. On average, Ontario has 9 inbound flights from Mesa per day from 3 airlines. Ontario is conveniently located just 3.1 mi from Ontario’s city center.

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

    To fly one-way, consider booking your trip with Frontier, which is currently one of the cheapest options available, starting at $55. American Airlines flights start at $59 while deals on Southwest start at $69 one-way.

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

    Consider SkyWest Airlines (100%), Envoy Air (96%) or American Airlines (94%) when booking your flight. These represent the most reliable airlines when flying from Mesa to Ontario.

  • What are the cheapest flights from Mesa to Ontario?

    The cheapest flight price from Mesa to Ontario is $68. On average you can expect to pay $246. The most popular route, (Phoenix Sky Harbor Intl - Ontario), can usually be booked for $109.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Mesa to Ontario 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 Mesa to Ontario?

    Currently, August is the cheapest month in which you can book a flight from Mesa to Ontario (average of $246). Flying from Mesa to Ontario in March is currently the most expensive (average of $315). 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 Mesa to Ontario

Discover the top 3 airlines that operate flights from Mesa to Ontario. 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 February 22, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$38Average$92FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$117Average$273FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$138Average$272FlexibilityNo cancel feeOn-time63%
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