HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Mesa

$79+ 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 5/21. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — PHX
May 5 — May 121
Mon 5/5
Mon 5/12
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to Mesa 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 Ontario to Mesa are usually found in July or June, booked 75 days in advance, depart on a Friday or Saturday and return on a Wednesday

Cheap flight deals from Ontario to Mesa

Keep the following information in mind while searching for Ontario to Mesa flight deals. Data was last updated April 30, 2025.

Round-trip from

$170
(Frontier)

One-way from

$79
(Cheapflightsfares)

Popular in

December

Cheapest in

July

Average price

$176
From Ontario to Mesa
Search Deals
One-way flight from Ontario to Mesa
Search Deals
Highest demand for flights based on searches. 22% potential increase in price ($60 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 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 April 30, 2025.

This Frontier deal was found by Cheapflights users on 4/28. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/178:24 amONT - PHX
1 stop6h 50mFrontier
Tue 5/201:17 pmPHX - ONT
1 stop10h 42mFrontier
Deal found 4/28$170
This American Airlines deal was found by Cheapflights users on 4/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/147:02 pmONT - PHX
Nonstop1h 17mAmerican Airlines
Wed 6/188:25 pmPHX - ONT
Nonstop1h 13mAmerican Airlines
Deal found 4/27$224
This Southwest deal was found by Cheapflights users on 4/28. 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.
Fri 5/304:55 pmONT - PHX
Nonstop1h 15mSouthwest
Sat 5/3110:05 amPHX - ONT
1 stop7h 20mSouthwest
Deal found 4/28$225
This Expedia deal was found by Cheapflights users on 4/28. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/178:24 amONT - PHX
1 stop6h 50mMultiple Airlines
Tue 5/207:00 amPHX - ONT
2 stops11h 25mMultiple Airlines
Deal found 4/28$272
This Alaska Airlines deal was found by Cheapflights users on 4/28. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/34:45 pmONT - PHX
1 stop7h 13mAlaska Airlines
Wed 6/113:43 pmPHX - ONT
1 stop7h 03mAlaska Airlines
Deal found 4/28$304
This Delta deal was found by Cheapflights users on 4/28. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/46:00 amONT - PHX
1 stop6h 50mDelta
Tue 6/107:11 pmPHX - ONT
1 stop15h 14mDelta
Deal found 4/28$305

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 April 30, 2025.
Use the filters below to find and compare flights from Ontario to Mesa that are best for you.

Fly from

Ontario

Fly to

Mesa

Route

Depart

Return

Price

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Sat 5/17

8:24 am-3:14 pm

1 stop6h 50m

Phoenix Sky Harbor Intl

Tue 5/20

1:17 pm-11:59 pm

1 stop10h 42m

$170

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Sat 6/14

7:02 pm-8:19 pm

Nonstop1h 17m

Phoenix Sky Harbor Intl

Wed 6/18

8:25 pm-9:38 pm

Nonstop1h 13m

$224

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Fri 5/30

4:55 pm-6:10 pm

Nonstop1h 15m

Phoenix Sky Harbor Intl

Sat 5/31

10:05 am-5:25 pm

1 stop7h 20m

$225

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Sun 5/18

12:59 am-8:24 am

1 stop7h 25m

Phoenix Sky Harbor Intl

Wed 5/21

7:00 am-6:25 pm

2 stops11h 25m

$262

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Tue 6/3

4:45 pm-11:58 pm

1 stop7h 13m

Phoenix Sky Harbor Intl

Wed 6/11

3:43 pm-10:46 pm

1 stop7h 03m

$304

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Wed 6/4

6:00 am-12:50 pm

1 stop6h 50m

Phoenix Sky Harbor Intl

Tue 6/10

7:11 pm-10:25 am

1 stop15h 14m

$305

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Wed 5/21

1:08 pm-4:49 pm

1 stop3h 41m

$79

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Thu 5/29

1:14 pm-2:29 pm

Nonstop1h 15m

$100

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Wed 6/25

6:45 am-1:05 pm

2 stops6h 20m

$124

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Tue 6/3

6:00 am-12:51 pm

1 stop6h 51m

$142

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/28

Showing 1-10 of 12 results
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

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

Use this chart to determine the optimal time to book a round-trip flight from Ontario to Mesa. Price data was last updated on April 25, 2025.

Booking 63 days in advance of your planned departure date is, on average, the best time to get cheap flights from Ontario to Mesa. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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

Currently, January is the cheapest month in which you can book a flight from Ontario to Mesa (average of $258). Flying from Ontario to Mesa in March is currently the most expensive (average of $337). 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 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 April 30, 2025.

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

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 December 16, 2024.

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

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 April 30, 2025.

The most flights from ONT to MS9 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 (1 on average).

Rainfall in Mesa by month

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

In terms of precipitation, rainfall in Mesa ranges from 0.0 - 1.1 inches per month. July is typically the wettest month, when rainfall can reach 1.1 in. June is typically the driest time to visit Mesa when rainfall is around 0.0 in.

Temperature in Mesa by month

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

If weather is an important factor for your trip to Mesa, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 95.0 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 55.4 F).

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 April 30, 2025.
To help decide which airline to fly from Ontario to Mesa, see what other customers have to say about Alaska Airlines, Southwest and Delta. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,968 reviews

Entertainment

7.1

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.1

Comfort

7.9

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
9,968 reviews
Alaska Airlines
8.0
Very good
9,968 reviews

Entertainment

7.1

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.1

Comfort

7.9

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
4,295 reviews
Alaska Airlines
8.0
Very good
9,968 reviews

Entertainment

7.1

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.1

Comfort

7.9

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
7,936 reviews
Alaska Airlines
8.0
Very good
9,968 reviews

Entertainment

7.1

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.1

Comfort

7.9

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
8,696 reviews
Alaska Airlines
8.0
Very good
9,968 reviews

Entertainment

7.1

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
9,968 reviews

Entertainment

7.1

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.1

Comfort

7.9

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 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 6 outbound flights to Mesa per day. You should also have plenty of airline options to choose from since 3 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.

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

    $79 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on American Airlines and Southwest, with prices starting from $100 and $124, 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: Envoy Air (94%), Southwest (89%), American Airlines (89%).

  • What are the cheapest flights from Ontario to Mesa?

    While on average a flight from Ontario to Mesa is generally $820, our data shows the cheapest flight currently is $99. When looking at the most popular route, (Ontario - Phoenix Sky Harbor Intl), you can expect to pay $187 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.

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

    Currently, January is the cheapest month in which you can book a flight from Ontario to Mesa (average of $258). Flying from Ontario to Mesa in March is currently the most expensive (average of $337). 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 Ontario to Mesa

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

Top 3 airlines flying from Ontario to Mesa

Discover the top 3 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 April 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$39Average$94FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$111Average$258FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$126Average$278FlexibilityNo cancel feeOn-time71%

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.