HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ontario

$49+ 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 5/20. Fares are subject to change and may not be available on all flights or dates of travel.
PHX — ONT
Apr 22 — Apr 291
Tue 4/22
Tue 4/29
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Mesa to Ontario with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: 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 April 17, 2025.

Round-trip from

$97
(American Airlines)

One-way from

$49
(Southwest)

Popular in

December

Cheapest in

June

Average price

$161
From Mesa to Ontario
Search Deals
One-way flight from Mesa to Ontario
Search Deals
Highest demand for flights based on searches. 25% potential increase in price ($66 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($9 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2025
Search Deals

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 April 17, 2025.

This American Airlines deal was found by Cheapflights users on 4/17. 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.
Thu 5/157:41 amPHX - ONT
Nonstop1h 13mAmerican Airlines
Mon 5/197:25 pmONT - PHX
Nonstop1h 15mAmerican Airlines
Deal found 4/17$97
This Southwest deal was found by Cheapflights users on 4/16. 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.
Thu 5/154:20 pmPHX - ONT
Nonstop1h 15mSouthwest
Tue 5/206:10 amONT - PHX
1 stop3h 45mSouthwest
Deal found 4/16$107
This Cheapflightsfares deal was found by Cheapflights users on 4/17. 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 5/85:50 amPHX - ONT
1 stop5h 25mFrontier
Sun 5/118:24 amONT - PHX
1 stop5h 08mFrontier
Deal found 4/17$157
This United Airlines deal was found by Cheapflights users on 4/17. 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.
Wed 5/145:15 amPHX - ONT
1 stop7h 09mUnited Airlines
Wed 5/146:48 pmONT - PHX
1 stop4h 39mUnited Airlines
Deal found 4/17$206
This Orbitz deal was found by Cheapflights users on 4/16. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/157:00 amPHX - ONT
2 stops15h 46mMultiple Airlines
Sun 5/1812:59 amONT - PHX
1 stop7h 25mMultiple Airlines
Deal found 4/16$287
This Alaska Airlines deal was found by Cheapflights users on 4/17. 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.
Sat 5/177:00 amPHX - ONT
2 stops15h 46mAlaska Airlines
Sat 5/244:45 pmONT - PHX
1 stop7h 13mAlaska Airlines
Deal found 4/17$333

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 April 17, 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

Thu 5/8

7:41 am-8:54 am

Nonstop1h 13m

Ontario

Mon 5/12

7:25 pm-8:40 pm

Nonstop1h 15m

$97

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Thu 5/15

4:20 pm-5:35 pm

Nonstop1h 15m

Ontario

Tue 5/20

6:10 am-9:55 am

1 stop3h 45m

$107

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Thu 5/8

11:08 am-5:57 pm

1 stop6h 49m

Ontario

Mon 5/12

8:24 am-1:32 pm

1 stop5h 08m

$158

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Thu 5/15

7:00 am-10:46 pm

2 stops15h 46m

Ontario

Sun 5/18

12:59 am-8:24 am

1 stop7h 25m

$287

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Thu 5/8

6:00 am-3:32 pm

1 stop9h 32m

Ontario

Sat 5/10

7:00 am-4:28 pm

2 stops9h 28m

$343

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Tue 4/22

5:15 am-11:05 am

1 stop5h 50m

Ontario

Tue 4/22

3:55 pm-1:06 pm

1 stop21h 11m

$751

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Thu 5/8

5:10 pm-6:23 pm

Nonstop1h 13m

$49

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Mon 6/9

6:20 am-11:35 am

1 stop5h 15m

$59

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Thu 5/8

5:50 am-11:15 am

1 stop5h 25m

$78

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Tue 5/20

7:00 am-6:25 pm

2 stops11h 25m

$168

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/16

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 April 11, 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 April 17, 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 April 17, 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 (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 April 17, 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
9,887 reviews

Boarding

8.1

Comfort

7.9

Crew

8.5

Entertainment

7.1

Food

7.1

Overall

8.0

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Alaska Airlines
8.0
Very good
9,887 reviews
Alaska Airlines
8.0
Very good
9,887 reviews

Boarding

8.1

Comfort

7.9

Crew

8.5

Entertainment

7.1

Food

7.1

Overall

8.0

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Southwest
8.0
Very good
4,280 reviews
Alaska Airlines
8.0
Very good
9,887 reviews

Boarding

8.1

Comfort

7.9

Crew

8.5

Entertainment

7.1

Food

7.1

Overall

8.0

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Delta
8.0
Very good
7,916 reviews
Alaska Airlines
8.0
Very good
9,887 reviews

Boarding

8.1

Comfort

7.9

Crew

8.5

Entertainment

7.1

Food

7.1

Overall

8.0

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
United Airlines
7.4
Good
8,667 reviews
Alaska Airlines
8.0
Very good
9,887 reviews

Boarding

8.1

Comfort

7.9

Crew

8.5

Entertainment

7.1

Food

7.1

Overall

8.0

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
9,887 reviews

Boarding

8.1

Comfort

7.9

Crew

8.5

Entertainment

7.1

Food

7.1

Overall

8.0

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

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 Southwest, which is currently one of the cheapest options available, starting at $49. Frontier flights start at $78 while deals on American Airlines start at $100 one-way.

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

    Consider Envoy Air (91%), British Airways (84%) or Southwest (80%) 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 $63. On average you can expect to pay $213. 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 $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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Mesa to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
Sky Harbor Intl to Los Angeles flights
Sky Harbor Intl to San Diego flights
Sky Harbor Intl to San Francisco flights
Las Vegas to Los Angeles flights
Sky Harbor Intl to Las Vegas flights
Las Vegas to Burbank flights
Las Vegas to Santa Ana flights
Las Vegas to San Francisco flights
Sky Harbor Intl to Burbank flights
Sky Harbor Intl to San Jose flights
Sky Harbor Intl to Santa Ana flights
Sky Harbor Intl to Ontario flights
Tucson to Las Vegas flights
Sky Harbor Intl to Reno flights
Sky Harbor Intl to Sacramento flights
Las Vegas to San Diego flights
Las Vegas to Ontario flights
Las Vegas to San Jose flights
Las Vegas to Reno flights
Las Vegas to Oakland flights
Sky Harbor Intl to Oakland flights
Tucson to Los Angeles flights
Las Vegas to Long Beach flights
Tucson to San Francisco flights
Las Vegas to Sacramento flights
Sky Harbor Intl to Medford flights
Las Vegas to Palm Springs flights
Tucson to Sacramento flights
Tucson to Ontario flights
Sky Harbor Intl to Fresno flights
Phoenix-Mesa Gateway to Las Vegas flights
Sky Harbor Intl to Monterey flights
Sky Harbor Intl to Santa Barbara flights
Sky Harbor Intl to Long Beach flights
Sky Harbor Intl to Palm Springs flights
Tucson to San Diego flights
Tucson to Santa Ana flights
Las Vegas to Fresno flights
Sky Harbor Intl to San Luis Obispo flights
Las Vegas to Santa Barbara flights
Tucson to San Luis Obispo flights
Las Vegas to Santa Rosa flights
Tucson to Long Beach flights
Tucson to San Jose flights
Las Vegas to Stockton flights
Sky Harbor Intl to Santa Rosa flights
Tucson to Reno flights
Sky Harbor Intl to Bakersfield flights
Las Vegas to Tijuana flights
Prescott to Los Angeles flights

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 April 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$39Average$98FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$119Average$281FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$129Average$260FlexibilityNo cancel feeOn-time63%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.