$188 Cheap Flights from Ontario (ONT) to Cancun (CUN)

View $188 flight on Mon, May 19, 2025Opens in a new window

Popular airlines from Los Angeles - Ontario Intl. Airport (ONT) to Cancun Intl. Airport (CUN)

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Find available prices by choosing your travel dates.

Cheap Flights from Ontario to Cancun (ONT-CUN)

Prices were available within the past 7 days and start at $188 for one-way flights and $405 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Mon, Aug 18 - Fri, Aug 22
ONT
Ontario
CUN
Cancun
$405 Roundtrip, found 3 days ago
$405
Roundtrip
found 3 days ago
Select Delta flight, departing Mon, Aug 18 from Ontario to Cancun, returning Fri, Aug 22, priced at $405 found 3 days ago
Southwest Airlines
Mon, May 19 - Wed, May 28
ONT
Ontario
CUN
Cancun
$405 Roundtrip, just found
$405
Roundtrip
just found
Select Southwest Airlines flight, departing Mon, May 19 from Ontario to Cancun, returning Wed, May 28, priced at $405 just found
Southwest Airlines
Mon, Aug 25 - Fri, Aug 29
ONT
Ontario
CUN
Cancun
$409 Roundtrip, found 4 hours ago
$409
Roundtrip
found 4 hours ago
Select Southwest Airlines flight, departing Mon, Aug 25 from Ontario to Cancun, returning Fri, Aug 29, priced at $409 found 4 hours ago
American Airlines
Sun, May 25 - Fri, May 30
ONT
Ontario
CUN
Cancun
$409 Roundtrip, found 7 hours ago
$409
Roundtrip
found 7 hours ago
Select American Airlines flight, departing Sun, May 25 from Ontario to Cancun, returning Fri, May 30, priced at $409 found 7 hours ago
American Airlines
Sat, May 31 - Wed, Jun 4
ONT
Ontario
CUN
Cancun
$414 Roundtrip, found 1 hour ago
$414
Roundtrip
found 1 hour ago
Select American Airlines flight, departing Sat, May 31 from Ontario to Cancun, returning Wed, Jun 4, priced at $414 found 1 hour ago
United
Sun, May 25 - Fri, May 30
ONT
Ontario
CUN
Cancun
$417 Roundtrip, found 7 hours ago
$417
Roundtrip
found 7 hours ago
Select United flight, departing Sun, May 25 from Ontario to Cancun, returning Fri, May 30, priced at $417 found 7 hours ago
American Airlines
Sat, May 17 - Thu, May 22
ONT
Ontario
CUN
Cancun
$418 Roundtrip, found 7 hours ago
$418
Roundtrip
found 7 hours ago
Select American Airlines flight, departing Sat, May 17 from Ontario to Cancun, returning Thu, May 22, priced at $418 found 7 hours ago
American Airlines
Sat, Jun 7 - Tue, Jun 10
ONT
Ontario
CUN
Cancun
$419 Roundtrip, found 10 hours ago
$419
Roundtrip
found 10 hours ago
Select American Airlines flight, departing Sat, Jun 7 from Ontario to Cancun, returning Tue, Jun 10, priced at $419 found 10 hours ago
American Airlines
Wed, Oct 1 - Thu, Oct 9
ONT
Ontario
CUN
Cancun
$420 Roundtrip, found 17 hours ago
$420
Roundtrip
found 17 hours ago
Select American Airlines flight, departing Wed, Oct 1 from Ontario to Cancun, returning Thu, Oct 9, priced at $420 found 17 hours ago
Frontier Airlines
Fri, May 9 - Fri, May 16
ONT
Ontario
CUN
Cancun
$426 Roundtrip, found 5 hours ago
$426
Roundtrip
found 5 hours ago
Select Frontier Airlines flight, departing Fri, May 9 from Ontario to Cancun, returning Fri, May 16, priced at $426 found 5 hours ago
Flights from Ontario (ONT) to Cancun (CUN)
Origin airport
Los Angeles - Ontario Intl.
Destination airport
Cancun Intl.
Airlines serving
Aeromexico, Air Canada, Alaska Airlines, American Airlines, Delta, Frontier Airlines, Hawaiian Airlines, JetBlue Airways, Southwest Airlines, United, Volaris
Roundtrip price
$404
Distance
2074 mi

Ontario to Cancun Flights

The cheapest times to fly from Ontario to Cancun

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Ontario to Cancun are during the month of August. You can find some of the cheapest flights from Ontario to Cancun with Expedia's search tool and vast selection of airlines.

The best time to book a flight from Ontario to Cancun

Sunday is one of the best days to book for cheap flights from Ontario to Cancun: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

How to find cheap round-trip tickets from Ontario to Cancun

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Ontario to Cancun in 2025. You can also book with separate airlines for your outbound and return journeys, from $188 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Ontario to Cancun flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

You could also save big by booking one of Expedia's vacation packages. Bundling together your Ontario to Cancun airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

*Terms apply.

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

Frequently asked questions

How much does a flight from Los Angeles - Ontario Intl. Airport (ONT) to Cancun Intl. Airport (CUN) cost?
Discover the latest flight deals from ONT to CUN by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from ONT to CUN?
The cheapest flights from ONT to CUN are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
Which airlines fly direct from Los Angeles - Ontario Intl. Airport (ONT) to Cancun Intl. Airport (CUN)?
Direct flights aren’t available from Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Cancun Intl. Airport (CUN). However, you can find other airports with nonstop flights. Hop on your plane at Los Angeles Intl. Airport (LAX) and fly straight to Cancun without layovers.
What is the cheapest airline that flies from ONT to CUN?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that’ll take you from ONT to CUN. Sort your results by “Price (lowest to highest)” to snap up a great deal.
How many flights per day from Los Angeles - Ontario Intl. Airport (ONT) to Cancun Intl. Airport (CUN)?
Nonstop flights from Los Angeles - Ontario Intl. Airport (ONT) to Cancun Intl. Airport (CUN) aren’t available daily, so you’ll have to take a flight with a layover. Explore your options with Expedia’s filter tool. Enter your dates and choose either “1 Stop” or “2+ Stops.”
What day of the week has the most flights from ONT to CUN?
You’ll typically find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can vary from season to season and during public holidays or peak travel times.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Los Angeles - Ontario Intl. Airport (ONT) to Cancun Intl. Airport (CUN)?
Opt for a flight from Los Angeles - Ontario Intl. Airport (ONT) to Cancun Intl. Airport (CUN) that leaves before 3 PM to reduce the likelihood of delays. Departures after this time have a 22% higher chance of being canceled, on average.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.
Is it cheaper to buy a plane ticket from Los Angeles - Ontario Intl. Airport (ONT) to Cancun Intl. Airport (CUN) last-minute?
Booking your flight from ONT to CUN shortly before your journey is generally more expensive. But if you’re flexible with your travel dates and times, you could land a cheap last-minute fare.
Is it cheaper to book an ONT to CUN flight and hotel package?
Opting for an ONT to CUN flight and hotel package is generally cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Choose from our impressive range of accommodations and then add flights, car rentals and activities to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Los Angeles - Ontario Intl. Airport (ONT) to Cancun Intl. Airport (CUN)?
If you reserved your ONT to CUN flight in the last 24 hours, you may be able to cancel or modify it at no cost. Depending on the airline and the ticket type you purchased, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal for further details.

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*Available to One Key members.