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Ontario

$72+ 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 6/13. Fares are subject to change and may not be available on all flights or dates of travel.
PHX — ONT
May 20 — May 271
Tue 5/20
Tue 5/27
1 adult, Economy
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Cheapflights Tip: The best prices from Mesa to Ontario are usually found in July or June, booked 70 days in advance, depart on a Saturday or Wednesday 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 May 15, 2025.

Round-trip from

$141
(Cheapflightsfares)

One-way from

$72
(Frontier)

Popular in

December

Cheapest in

July

Average price

$128
From Mesa to Ontario
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One-way flight from Mesa to Ontario
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Highest demand for flights based on searches. 22% potential increase in price ($57 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($8 potential savings vs. average RT price).
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Average for round-trip flights in May 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 May 15, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 5/14. 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.
Sat 6/2112:28 pmPHX - ONT
1 stop6h 46mFrontier
Sat 6/285:13 pmONT - PHX
1 stop4h 02mFrontier
Deal found 5/14$132
This American Airlines deal was found by Cheapflights users on 5/14. 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 5/285:10 pmPHX - ONT
Nonstop1h 13mAmerican Airlines
Sat 5/3110:00 amONT - PHX
Nonstop1h 19mAmerican Airlines
Deal found 5/14$199
This Southwest deal was found by Cheapflights users on 5/13. 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 6/36:00 amPHX - ONT
1 stop4h 10mSouthwest
Sat 6/74:35 pmONT - PHX
Nonstop1h 20mSouthwest
Deal found 5/13$215
This Expedia deal was found by Cheapflights users on 5/13. 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 6/32:05 pmPHX - ONT
2 stops8h 41mMultiple Airlines
Fri 6/612:59 amONT - PHX
1 stop10h 02mMultiple Airlines
Deal found 5/13$287
This Alaska Airlines deal was found by Cheapflights users on 5/14. 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.
Fri 8/221:54 pmPHX - ONT
1 stop10h 05mAlaska Airlines
Tue 8/263:04 pmONT - PHX
1 stop8h 51mAlaska Airlines
Deal found 5/14$358

Cheapflights Fare Finder

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 May 15, 2025.
Use the filters below to find and compare flights from Mesa to Ontario that are best for you.

Fly from

Mesa

Fly to

Ontario

Route

Depart

Return

Price

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Sat 6/21

12:28 pm-7:14 pm

1 stop6h 46m

Ontario

Sat 6/28

5:13 pm-9:15 pm

1 stop4h 02m

$132

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Wed 5/28

5:10 pm-6:23 pm

Nonstop1h 13m

Ontario

Sat 5/31

10:00 am-11:19 am

Nonstop1h 19m

$199

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Tue 6/3

6:00 am-10:10 am

1 stop4h 10m

Ontario

Sat 6/7

4:35 pm-5:55 pm

Nonstop1h 20m

$215

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Tue 6/3

2:05 pm-10:46 pm

2 stops8h 41m

Ontario

Fri 6/6

12:59 am-11:01 am

1 stop10h 02m

$287

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Sat 5/31

7:00 am-10:46 pm

2 stops15h 46m

Ontario

Sat 6/7

7:30 am-5:16 pm

1 stop9h 46m

$379

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Thu 6/5

10:05 am-5:39 pm

1 stop7h 34m

Ontario

Tue 6/10

6:41 pm-10:59 am

1 stop16h 18m

$400

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Fri 6/13

6:00 am-11:52 am

1 stop5h 52m

$72

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Fri 7/4

12:55 pm-2:05 pm

Nonstop1h 10m

$100

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Sat 6/21

2:56 pm-4:13 pm

Nonstop1h 17m

$116

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Sat 6/7

3:20 pm-11:57 pm

1 stop8h 37m

$172

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/15

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.

Cheapflights Insights

Everything you need to know about your flight from Mesa to Ontario

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 May 9, 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 $328). 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 May 15, 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 Saturday at noon when fares are most often at their lowest. Sunday mornings 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 May 15, 2025.

The most flights from MS9 to ONT are scheduled on a Monday (13 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (8 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 May 15, 2025.
To help decide which airline to fly from Mesa to Ontario, see what other customers have to say about Alaska Airlines, Southwest and Delta. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.9

Food

7.1

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.9

Food

7.1

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,291 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.9

Food

7.1

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,946 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.9

Food

7.1

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.9
Good
2,435 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.9

Food

7.1

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,731 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.9

Food

7.1

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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 11 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 $72. Southwest flights start at $100 while deals on American Airlines start at $116 one-way.

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

    Consider Envoy Air (91%), British Airways (87%) or SkyWest Airlines (86%) 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 $48. On average you can expect to pay $221. The most popular route, (Phoenix Sky Harbor Intl - Ontario), can usually be booked for $144.

  • 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 $328). 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.

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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 May 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$40Average$95FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$118Average$282FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$128Average$262FlexibilityNo cancel feeOn-time63%

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