HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ontario

$57+ 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 6/10. Fares are subject to change and may not be available on all flights or dates of travel.
PHX — ONT
Jun 13 — Jun 201
Sat 6/13
Sat 6/20
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 September or August, booked 85 days in advance, depart on a Wednesday or Saturday 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 May 14, 2026.

This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/102:03 pm
PHX
-
ONT
1 stop5h 48m
Frontier
Wed 6/243:34 pm
ONT
-
PHX
1 stop7h 26m
Frontier
Deal found 5/13$113
This Kiwi.com deal was found by Cheapflights users on 5/11. 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 7/82:00 pm
PHX
-
ONT
1 stop5h 53m
Frontier
Tue 7/211:28 pm
ONT
-
PHX
1 stop9h 29m
Frontier
Deal found 5/11$115
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.
Wed 6/1012:55 pm
PHX
-
ONT
Nonstop1h 10m
Southwest
Wed 6/247:20 pm
ONT
-
PHX
Nonstop1h 15m
Southwest
Deal found 5/13$117
This Kiwi.com deal was found by Cheapflights users on 5/9. 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 6/27:40 am
PHX
-
ONT
1 stop8h 04m
Frontier
Thu 6/43:30 pm
ONT
-
PHX
1 stop7h 54m
Frontier
Deal found 5/9$118
This Kiwi.com deal was found by Cheapflights users on 5/11. 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 6/17:40 am
PHX
-
ONT
1 stop7h 29m
Frontier
Wed 6/173:34 pm
ONT
-
PHX
1 stop7h 26m
Frontier
Deal found 5/11$121
This Kiwi.com deal was found by Cheapflights users on 5/11. 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 6/17:40 am
PHX
-
ONT
1 stop7h 29m
Frontier
Wed 6/103:34 pm
ONT
-
PHX
1 stop7h 26m
Frontier
Deal found 5/11$123
This Kiwi.com deal was found by Cheapflights users on 5/10. 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 6/47:40 am
PHX
-
ONT
1 stop7h 29m
Frontier
Sat 6/63:30 pm
ONT
-
PHX
1 stop7h 54m
Frontier
Deal found 5/10$128
This Southwest deal was found by Cheapflights users on 5/11. 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 6/95:10 pm
PHX
-
ONT
1 stop5h 35m
Southwest
Tue 6/166:35 pm
ONT
-
PHX
1 stop3h 05m
Southwest
Deal found 5/11$137
This Kiwi.com deal was found by Cheapflights users on 5/11. 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 6/92:20 pm
PHX
-
ONT
2 stops22h 28m
Frontier
Tue 6/163:34 pm
ONT
-
PHX
1 stop7h 26m
Frontier
Deal found 5/11$142
This Southwest deal was found by Cheapflights users on 5/11. 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.
Mon 6/18:05 pm
PHX
-
ONT
Nonstop1h 10m
Southwest
Wed 6/107:20 pm
ONT
-
PHX
Nonstop1h 15m
Southwest
Deal found 5/11$147
This American Airlines deal was found by Cheapflights users on 5/12. 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 7/295:04 pm
PHX
-
ONT
Nonstop1h 15m
American Airlines
Tue 8/47:14 pm
ONT
-
PHX
Nonstop1h 22m
American Airlines
Deal found 5/12$155

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 May 14, 2026.

Round-trip from

$113
(Kiwi.com)

One-way from

$57
(WAYA)

Popular in

July

Cheapest in

September

Average price

$258
From Mesa to Ontario
Search Deals
One-way flight from Mesa to Ontario
Search Deals
Highest demand for flights based on searches. 3% potential increase in price ($8 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 May 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 May 14, 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 6/10

7:35 pm-10:45 pm

1 stop3h 10m

Ontario

Wed 6/24

7:20 pm-8:35 pm

Nonstop1h 15m

$127

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Mon 6/1

9:55 pm-11:05 pm

Nonstop1h 10m

Ontario

Wed 6/10

6:35 pm-9:40 pm

1 stop3h 05m

$157

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Tue 6/2

6:20 am-9:50 am

1 stop3h 30m

Ontario

Thu 6/4

8:50 pm-10:05 pm

Nonstop1h 15m

$157

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Mon 6/8

1:55 pm-3:05 pm

Nonstop1h 10m

Ontario

Sat 6/13

6:30 pm-7:50 pm

Nonstop1h 20m

$187

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Mon 6/22

2:50 pm-8:10 pm

1 stop5h 20m

Ontario

Fri 6/26

5:15 am-6:30 am

Nonstop1h 15m

$207

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Wed 6/10

5:50 am-9:05 am

1 stop3h 15m

Ontario

Thu 6/11

6:00 am-12:25 pm

2 stops6h 25m

$253

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Fri 6/19

7:50 am-9:05 am

Nonstop1h 15m

Ontario

Sun 6/21

8:40 pm-9:55 pm

Nonstop1h 15m

$268

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Fri 8/7

1:55 pm-3:05 pm

Nonstop1h 10m

Ontario

Sun 8/9

8:35 pm-9:55 pm

Nonstop1h 20m

$268
Quickest round-trip

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Wed 6/3

8:35 pm-9:45 pm

Nonstop1h 10m

Ontario

Sun 6/7

4:50 pm-6:05 pm

Nonstop1h 15m

$274

PhoenixOntario

PHX - ONT

PHXONT

Phoenix Sky Harbor Intl

Fri 6/12

10:05 am-11:20 am

Nonstop1h 15m

Ontario

Sun 6/14

4:35 pm-8:00 pm

1 stop3h 25m

$278

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/10

Showing 1-10 of 24 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 May 14, 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 19% 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 May 9, 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 May 14, 2026.

The most flights from MS9 to ONT are scheduled on a Thursday (13 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (3 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 May 14, 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
4,298 reviews

Comfort

8.0

Crew

8.6

Food

7.0

Boarding

8.1

Entertainment

7.5

Overall

8.0

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
4,298 reviews
Southwest
8.0
Very good
4,298 reviews

Comfort

8.0

Crew

8.6

Food

7.0

Boarding

8.1

Entertainment

7.5

Overall

8.0

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
11,666 reviews
Southwest
8.0
Very good
4,298 reviews

Comfort

8.0

Crew

8.6

Food

7.0

Boarding

8.1

Entertainment

7.5

Overall

8.0

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
2,953 reviews
Southwest
8.0
Very good
4,298 reviews

Comfort

8.0

Crew

8.6

Food

7.0

Boarding

8.1

Entertainment

7.5

Overall

8.0

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 9 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 3h 10m. Southwest provides one of the quickest options available for as low as $127. The distance between Mesa and Ontario is about 324 mi.

  • 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 $48. American Airlines 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 (89%) or American Airlines (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 $24. On average you can expect to pay $284. 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

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 Las Vegas flights
Sky Harbor Intl to San Francisco flights
Las Vegas to Los Angeles flights
Sky Harbor Intl to Los Angeles flights
Las Vegas to San Francisco flights
Las Vegas to Reno flights
Las Vegas to Santa Ana flights
Sky Harbor Intl to San Diego flights
Sky Harbor Intl to San Jose flights
Las Vegas to Ontario flights
Tucson to Las Vegas flights
Sky Harbor Intl to Sacramento flights
Las Vegas to San Diego flights
Sky Harbor Intl to Santa Ana flights
Sky Harbor Intl to Reno flights
Sky Harbor Intl to Ontario flights
Las Vegas to Sacramento flights
Las Vegas to Burbank flights
Tucson to Los Angeles flights
Phoenix-Mesa Gateway to Las Vegas flights
Tucson to San Francisco flights
Sky Harbor Intl to Burbank flights
Sky Harbor Intl to Oakland flights
Las Vegas to Oakland flights
Tucson to San Diego flights
Sky Harbor Intl to Fresno flights
Las Vegas to San Jose flights
Tucson to Ontario flights
Sky Harbor Intl to Santa Rosa flights
Sky Harbor Intl to Medford flights
Sky Harbor Intl to San Luis Obispo flights
Sky Harbor Intl to Santa Barbara flights
Las Vegas to Long Beach flights
Sky Harbor Intl to Long Beach flights
Sky Harbor Intl to Monterey flights
Las Vegas to Santa Barbara flights
Tucson to Santa Ana flights
Tucson to Reno flights
Las Vegas to Stockton flights
Tucson to Burbank flights
Sky Harbor Intl to Palm Springs flights
Las Vegas to Santa Rosa flights
Tucson to Oakland flights
Las Vegas to San Luis Obispo flights
Las Vegas to Palm Springs flights
Las Vegas to Fresno flights
Prescott to Los Angeles flights
Tucson to Medford flights
Tucson to Sacramento flights
Las Vegas to Medford 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 May 14, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$84Average$175FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$97Average$280FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$97Average$268FlexibilityNo 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.
Site
©2026 Cheapflights