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Ontario

$59+ 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 5/15. Fares are subject to change and may not be available on all flights or dates of travel.
PHX — ONT
Mar 15 — Mar 221
Sat 3/15
Sat 3/22
1 adult, Economy
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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 March 10, 2025.

Round-trip from

$97
(American Airlines)

One-way from

$59
(Southwest)

Popular in

December

Cheapest in

June

Average price

$184
From Mesa to Ontario
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One-way flight from Mesa to Ontario
Search Deals
Highest demand for flights based on searches. 29% potential increase in price ($76 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($10 potential savings vs. average RT price).
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Average for round-trip flights in March 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 March 10, 2025.

This American Airlines deal was found by Cheapflights users on 3/9. 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 4/12:14 pmPHX - ONT
Nonstop1h 18mAmerican Airlines
Wed 4/97:25 pmONT - PHX
Nonstop1h 15mAmerican Airlines
Deal found 3/9$97
This Southwest deal was found by Cheapflights users on 3/9. 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 4/84:00 pmPHX - ONT
Nonstop1h 15mSouthwest
Tue 4/86:20 pmONT - PHX
1 stop4h 20mSouthwest
Deal found 3/9$107
This Frontier deal was found by Cheapflights users on 3/10. 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.
Tue 4/86:00 amPHX - ONT
1 stop8h 27mFrontier
Tue 4/153:17 pmONT - PHX
1 stop8h 40mFrontier
Deal found 3/10$150
This Expedia deal was found by Cheapflights users on 3/9. 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.
Tue 4/81:59 pmPHX - ONT
2 stops10h 00mMultiple Airlines
Mon 4/1412:59 amONT - PHX
1 stop11h 06mMultiple Airlines
Deal found 3/9$318
This Alaska Airlines deal was found by Cheapflights users on 3/9. 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.
Tue 4/89:08 pmPHX - ONT
1 stop12h 20mAlaska Airlines
Tue 4/157:00 amONT - PHX
2 stops10h 51mAlaska Airlines
Deal found 3/9$343
This United Airlines deal was found by Cheapflights users on 3/9. 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.
Sat 5/316:00 amPHX - ONT
2 stops16h 45mUnited Airlines
Mon 6/26:41 pmONT - PHX
2 stops14h 09mUnited Airlines
Deal found 3/9$486

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 March 10, 2025.

Fly from

Mesa

Fly to

Ontario

Route

Depart

Return

Price

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Tue 4/1

2:14 pm-3:32 pm

Nonstop1h 18m

Ontario

Wed 4/9

7:25 pm-8:40 pm

Nonstop1h 15m

$97

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Tue 4/8

4:00 pm-5:15 pm

Nonstop1h 15m

Ontario

Tue 4/8

6:20 pm-10:40 pm

1 stop4h 20m

$107

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Tue 4/8

6:00 am-2:27 pm

1 stop8h 27m

Ontario

Tue 4/15

3:17 pm-11:57 pm

1 stop8h 40m

$150

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Tue 4/8

1:59 pm-11:59 pm

2 stops10h 00m

Ontario

Mon 4/14

12:59 am-12:05 pm

1 stop11h 06m

$318

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Tue 4/8

9:08 pm-9:28 am

1 stop12h 20m

Ontario

Tue 4/15

7:00 am-5:51 pm

2 stops10h 51m

$343

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Sat 5/31

6:00 am-10:45 pm

2 stops16h 45m

Ontario

Mon 6/2

6:41 pm-8:50 am

2 stops14h 09m

$486

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Mon 7/7

7:25 pm-8:58 am

1 stop13h 33m

Ontario

Thu 7/10

7:00 am-6:18 pm

1 stop11h 18m

$922

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Thu 5/15

5:40 am-9:50 am

1 stop4h 10m

$59

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Tue 3/25

7:26 am-8:47 am

Nonstop1h 21m

$65

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Tue 4/8

5:09 pm-11:59 pm

1 stop6h 50m

$75

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/9

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 March 7, 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 $313). 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 March 10, 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 Wednesday evenings 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 March 10, 2025.

The most flights from MS9 to ONT are scheduled on a Monday (11 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (4 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 March 10, 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
4,300 reviews

Boarding

8.2

Crew

8.7

Entertainment

7.6

Overall

8.1

Comfort

8.1

Food

7.1

Reviews

1 / 20

10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

Southwest
8.1
Very good
4,300 reviews
Southwest
8.1
Very good
4,300 reviews

Boarding

8.2

Crew

8.7

Entertainment

7.6

Overall

8.1

Comfort

8.1

Food

7.1

Reviews

1 / 20

10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

Alaska Airlines
8.0
Very good
9,727 reviews
Southwest
8.1
Very good
4,300 reviews

Boarding

8.2

Crew

8.7

Entertainment

7.6

Overall

8.1

Comfort

8.1

Food

7.1

Reviews

1 / 20

10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

Delta
8.0
Very good
7,973 reviews
Southwest
8.1
Very good
4,300 reviews

Boarding

8.2

Crew

8.7

Entertainment

7.6

Overall

8.1

Comfort

8.1

Food

7.1

Reviews

1 / 20

10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

United Airlines
7.4
Good
8,631 reviews
Southwest
8.1
Very good
4,300 reviews

Boarding

8.2

Crew

8.7

Entertainment

7.6

Overall

8.1

Comfort

8.1

Food

7.1

Reviews

1 / 20

10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
4,300 reviews

Boarding

8.2

Crew

8.7

Entertainment

7.6

Overall

8.1

Comfort

8.1

Food

7.1

Reviews

1 / 20

10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

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 8 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 Southwest, which is currently one of the cheapest options available, starting at $59. American Airlines flights start at $65 while deals on Frontier start at $75 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 $58. On average you can expect to pay $222. The most popular route, (Phoenix Sky Harbor Intl - Ontario), can usually be booked for $97.

  • 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 $313). 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 March 10, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$40Average$94FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$116Average$275FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$132Average$271FlexibilityNo cancel feeOn-time63%
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