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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 9/5. Fares are subject to change and may not be available on all flights or dates of travel.
PHX — ONT
Aug 28 — Sep 41
Fri 8/28
Fri 9/4
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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Cheapflights Tip: The best prices from Mesa to Ontario are usually found in September or October, booked 62 days in advance, depart on a Saturday or Tuesday and return on a Wednesday

Cheap 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 July 29, 2026.

This Southwest deal was found by Cheapflights users on 7/27. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/294:10 pm
PHX
-
ONT
Nonstop1h 10m
Southwest
Tue 9/13:35 pm
ONT
-
PHX
Nonstop1h 20m
Southwest
Deal found 7/27$117
This Southwest deal was found by Cheapflights users on 7/28. 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.
Thu 9/38:55 pm
PHX
-
ONT
Nonstop1h 10m
Southwest
Sun 9/63:25 pm
ONT
-
PHX
Nonstop1h 20m
Southwest
Deal found 7/28$122
This Southwest deal was found by Cheapflights users on 7/26. 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 8/205:35 am
PHX
-
ONT
1 stop4h 45m
Southwest
Mon 8/245:15 am
ONT
-
PHX
Nonstop1h 15m
Southwest
Deal found 7/26$127
This Southwest deal was found by Cheapflights users on 7/28. 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.
Wed 8/197:10 am
PHX
-
ONT
2 stops6h 25m
Southwest
Sat 8/225:50 am
ONT
-
PHX
Nonstop1h 15m
Southwest
Deal found 7/28$132
This Kiwi.com deal was found by Cheapflights users on 7/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/208:35 am
PHX
-
ONT
1 stop15h 15m
Frontier
Mon 8/248:48 am
ONT
-
PHX
2 stops23h 10m
Frontier
Deal found 7/26$160
This Southwest deal was found by Cheapflights users on 7/28. 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 9/47:30 pm
PHX
-
ONT
Nonstop1h 15m
Southwest
Mon 9/75:15 am
ONT
-
PHX
Nonstop1h 15m
Southwest
Deal found 7/28$162
This Southwest deal was found by Cheapflights users on 7/25. 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.
Sat 8/227:20 am
PHX
-
ONT
2 stops6h 55m
Southwest
Sat 8/298:35 am
ONT
-
PHX
2 stops6h 40m
Southwest
Deal found 7/25$164
This Kiwi.com deal was found by Cheapflights users on 7/25. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/176:53 pm
PHX
-
ONT
1 stop15h 11m
Frontier
Mon 8/248:48 am
ONT
-
PHX
2 stops23h 10m
Frontier
Deal found 7/25$166
This Southwest deal was found by Cheapflights users on 7/25. 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 9/48:55 pm
PHX
-
ONT
Nonstop1h 10m
Southwest
Sun 9/63:25 pm
ONT
-
PHX
Nonstop1h 20m
Southwest
Deal found 7/25$167

Find flight deals from Mesa to Ontario

Keep the following information in mind while searching for Mesa to Ontario flight deals. Data was last updated July 29, 2026.

Round-trip from

$117
(Southwest)

One-way from

$59
(American Airlines)

Popular in

June

Cheapest in

September

Average price

$328
From Mesa to Ontario
Search Deals
One-way flight from Mesa to Ontario
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($46 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals

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 July 29, 2026.
Use the filters below to find and compare flights from Mesa to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Wed 9/9

7:45 pm-9:00 pm

Nonstop1h 15m

Ontario

Wed 9/16

6:40 am-8:05 am

Nonstop1h 25m

$117
Quickest round-trip

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Thu 8/20

1:55 pm-3:05 pm

Nonstop1h 10m

Ontario

Thu 8/27

5:15 am-6:30 am

Nonstop1h 15m

$117

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Mon 10/12

7:50 am-9:05 am

Nonstop1h 15m

Ontario

Wed 10/14

7:20 pm-8:35 pm

Nonstop1h 15m

$117

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Thu 9/3

8:55 pm-10:05 pm

Nonstop1h 10m

Ontario

Sun 9/6

3:25 pm-4:45 pm

Nonstop1h 20m

$122

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Wed 8/26

7:10 am-1:35 pm

2 stops6h 25m

Ontario

Wed 9/2

6:40 am-8:05 am

Nonstop1h 25m

$132

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Thu 8/20

7:02 am-12:12 pm

1 stop5h 10m

Ontario

Mon 8/24

1:56 pm-6:35 pm

1 stop4h 39m

$241

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Wed 8/19

1:12 pm-6:16 pm

1 stop5h 04m

Ontario

Thu 8/20

6:08 am-10:26 am

1 stop4h 18m

$241
Cheapest one-way

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Thu 8/27

5:35 am-10:20 am

1 stop4h 45m

$69
Quickest one-way

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Fri 9/4

7:30 pm-8:45 pm

Nonstop1h 15m

$104

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Fri 10/2

7:50 am-9:05 am

Nonstop1h 15m

$104

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

Showing 1-10 of 17 resultsSorted by cheapest first
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

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 July 29, 2026.

One of the essential ways to save on airfare from Mesa to Ontario is to remain as flexible as possible. Flights that are in the evening tend to be the most expensive. A flight at noon could potentially save you up to 30% on airfare.

How much does it cost to fly round-trip from Mesa to Ontario?

Airfare is below average for this route at the moment.
Mesa to Ontario flights typically cost between $158 and $328 in August.
The cheapest round-trip price found within the last 5 days was $117 on Southwest (Aug 29-Sep 1).

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 July 25, 2026.

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

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 July 29, 2026.
Peruse reviews from past customers who have flown with Southwest,American Airlines, andFrontier from Mesa to Ontario to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,227 reviews

Boarding

8.1

Overall

8.0

Crew

8.6

Food

7.0

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Walter,May 2026

LAS - BUR

Short but excellent flight. Everyone was friendly and professional it was a great flight!
Southwest
8.0
Very good
4,227 reviews
Southwest
8.0
Very good
4,227 reviews

Boarding

8.1

Overall

8.0

Crew

8.6

Food

7.0

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Walter,May 2026

LAS - BUR

Short but excellent flight. Everyone was friendly and professional it was a great flight!
American Airlines
7.1
Good
11,839 reviews
Southwest
8.0
Very good
4,227 reviews

Boarding

8.1

Overall

8.0

Crew

8.6

Food

7.0

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Walter,May 2026

LAS - BUR

Short but excellent flight. Everyone was friendly and professional it was a great flight!
Frontier
5.6
Fair
2,749 reviews
Southwest
8.0
Very good
4,227 reviews

Boarding

8.1

Overall

8.0

Crew

8.6

Food

7.0

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Walter,May 2026

LAS - BUR

Short but excellent flight. Everyone was friendly and professional it was a great flight!

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 6 inbound flights from Mesa per day from 3 airlines. Ontario is conveniently located just 3.1 mi from Ontario’s city center.

  • How long is the flight from Mesa to Ontario?

    A quick flight from Mesa to Ontario can take about 1h 15m. Southwest provides one of the quickest options available for as low as $117. The distance between Mesa and Ontario is about 324 mi. All flights are typically nonstop.

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

    To fly one-way, consider booking your trip with American Airlines, which is currently one of the cheapest options available, starting at $48. Southwest flights start at $48 while deals on Frontier start at $65 one-way.

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

    Consider American Airlines (83%), Envoy Air (80%) or Porter Airlines (77%) 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 $417. The most popular route, (Phoenix Sky Harbor Intl - Ontario), can usually be booked for $117.

  • 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.

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 July 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$81Average$175FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$97Average$283FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$97Average$266FlexibilityNo cancel feeOn-time63%

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