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Ontario

$58+ 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
May 28 — Jun 41
Thu 5/28
Thu 6/4
1 adult, Economy
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Cheapflights Tip: The best prices from Mesa to Ontario are usually found in September or August, booked 85 days in advance, depart on a Tuesday or Wednesday 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 April 28, 2026.

This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/2010:27 pm
PHX
-
ONT
1 stop9h 37m
Frontier
Wed 5/274:39 pm
ONT
-
PHX
1 stop6h 45m
Frontier
Deal found 4/27$112
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/267:40 am
PHX
-
ONT
1 stop8h 04m
Frontier
Tue 6/24:39 pm
ONT
-
PHX
1 stop6h 45m
Frontier
Deal found 4/28$113
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/207:40 am
PHX
-
ONT
1 stop8h 04m
Frontier
Thu 5/213:30 pm
ONT
-
PHX
1 stop7h 54m
Frontier
Deal found 4/28$120
This Kiwi.com deal was found by Cheapflights users on 4/24. 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.
Tue 5/197:40 am
PHX
-
ONT
1 stop8h 04m
Frontier
Wed 5/204:39 pm
ONT
-
PHX
1 stop6h 45m
Frontier
Deal found 4/24$128
This Kiwi.com deal was found by Cheapflights users on 4/26. 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 5/287:40 am
PHX
-
ONT
1 stop24h 24m
Frontier
Sun 6/73:30 pm
ONT
-
PHX
1 stop19h 53m
Frontier
Deal found 4/26$129
This Kiwi.com deal was found by Cheapflights users on 4/25. 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 6/110:27 pm
PHX
-
ONT
1 stop17h 17m
Frontier
Sun 6/73:30 pm
ONT
-
PHX
1 stop19h 53m
Frontier
Deal found 4/25$131
This American Airlines deal was found by Cheapflights users on 4/24. 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 5/197:17 am
PHX
-
ONT
Nonstop1h 22m
American Airlines
Wed 5/209:24 am
ONT
-
PHX
Nonstop1h 21m
American Airlines
Deal found 4/24$137
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/277:40 am
PHX
-
ONT
1 stop8h 04m
Frontier
Wed 6/34:39 pm
ONT
-
PHX
1 stop6h 45m
Frontier
Deal found 4/27$139
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.
Tue 5/194:29 pm
PHX
-
ONT
1 stop7h 20m
Frontier
Tue 5/264:39 pm
ONT
-
PHX
1 stop6h 45m
Frontier
Deal found 4/28$140

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 April 28, 2026.

Round-trip from

$112
(Kiwi.com)

One-way from

$59
(Kiwi.com)

Popular in

June

Cheapest in

September

Average price

$265
From Mesa to Ontario
Search Deals
One-way flight from Mesa to Ontario
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($34 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($6 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 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 April 28, 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 5/27

6:20 am-9:50 am

1 stop3h 30m

Ontario

Wed 6/3

3:45 pm-5:05 pm

Nonstop1h 20m

$147
Quickest round-trip

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Tue 5/26

1:55 pm-3:05 pm

Nonstop1h 10m

Ontario

Tue 6/2

2:25 pm-3:40 pm

Nonstop1h 15m

$157

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Mon 6/8

7:50 am-9:05 am

Nonstop1h 15m

Ontario

Mon 6/8

5:15 pm-6:35 pm

Nonstop1h 20m

$177

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Sat 5/23

1:55 pm-5:40 pm

1 stop3h 45m

Ontario

Sat 5/30

5:40 am-6:55 am

Nonstop1h 15m

$187

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Tue 6/23

9:50 pm-11:00 pm

Nonstop1h 10m

Ontario

Tue 7/7

7:20 pm-8:35 pm

Nonstop1h 15m

$218

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Thu 5/28

9:35 am-10:55 am

Nonstop1h 20m

Ontario

Thu 5/28

3:55 pm-9:15 pm

2 stops5h 20m

$253

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Wed 5/20

7:40 am-3:44 pm

1 stop8h 04m

Ontario

Thu 5/21

8:03 am-6:35 pm

1 stop10h 32m

$269

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Sun 5/24

2:30 pm-8:50 pm

2 stops6h 20m

Ontario

Sat 6/6

3:00 pm-8:15 pm

1 stop5h 15m

$283

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Wed 9/9

7:08 am-12:12 pm

1 stop5h 04m

Ontario

Tue 9/22

6:00 am-10:13 am

1 stop4h 13m

$297
Cheapest one-way
Quickest one-way

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Thu 6/4

9:00 pm-10:10 pm

Nonstop1h 10m

$89

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/23

Showing 1-10 of 21 resultsSorted by cheapest first
1
2
3

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 April 28, 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 15% on airfare.

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 April 25, 2026.

Travelers seeking maximum savings on their Mesa to Ontario flight should consider departing on Tuesday evenings 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.

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 28, 2026.

The most flights from MS9 to ONT are scheduled on a Tuesday (12 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (1 on average).

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

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 28, 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
4,315 reviews

Comfort

8.0

Food

7.0

Overall

8.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Southwest
8.0
Very good
4,315 reviews
Southwest
8.0
Very good
4,315 reviews

Comfort

8.0

Food

7.0

Overall

8.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
American Airlines
7.1
Good
11,680 reviews
Southwest
8.0
Very good
4,315 reviews

Comfort

8.0

Food

7.0

Overall

8.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Frontier
5.7
Fair
2,970 reviews
Southwest
8.0
Very good
4,315 reviews

Comfort

8.0

Food

7.0

Overall

8.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

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 7 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 $177. 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 $67 one-way.

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

    Consider Envoy Air (100%), British Airways (92%) or American Airlines (84%) 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 $24. On average you can expect to pay $290. The most popular route, (Phoenix Sky Harbor Intl - Ontario), can usually be booked for $137.

  • 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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See prices for flight routes from nearby airports that may be better suited for you.
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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 April 28, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$84Average$177FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$97Average$269FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$97Average$278FlexibilityNo cancel feeOn-time71%

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