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$151+ Cheap flights from Cancún (CUN) 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 10/25. Fares are subject to change and may not be available on all flights or dates of travel.
CUN — ONT
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap flight deals from Cancún to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Cancún (CUN) to Ontario (ONT). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated September 11, 2025.

Round-trip from

$308
(United Airlines)

One-way from

$151
(Trip.com)

Popular in

April

Cheapest in

June

Average price

$442
From Cancun to Ontario
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One-way flight from Cancun to Ontario
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Highest demand for flights based on searches. 4% potential increase in price ($22 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($15 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Cancún to Ontario

Cheapest flights from Cancún to Ontario
Explore the most affordable flight options available from Cancún to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

This Trip.com deal was found by Cheapflights users on 9/8. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/3112:27 pmCUN - ONT
1 stop12h 04mUnited Airlines
Sun 11/95:05 amONT - CUN
1 stop7h 40mUnited Airlines
Deal found 9/8$303
This Delta deal was found by Cheapflights users on 9/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/234:16 pmCUN - ONT
1 stop9h 23mDelta
Mon 10/276:00 amONT - CUN
1 stop7h 16mDelta
Deal found 9/9$307
This United Airlines deal was found by Cheapflights users on 9/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/151:12 pmCUN - ONT
1 stop10h 12mUnited Airlines
Tue 10/216:00 amONT - CUN
1 stop6h 37mUnited Airlines
Deal found 9/11$308
This United Airlines deal was found by Cheapflights users on 9/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/257:51 amCUN - ONT
2 stops17h 01mUnited Airlines
Sat 11/16:38 pmONT - CUN
2 stops14h 47mUnited Airlines
Deal found 9/10$319
This United Airlines deal was found by Cheapflights users on 9/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/2512:36 pmCUN - ONT
1 stop11h 31mUnited Airlines
Sun 1/46:39 pmONT - CUN
2 stops22h 39mUnited Airlines
Deal found 9/10$329
This United Airlines deal was found by Cheapflights users on 9/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/151:04 pmCUN - ONT
1 stop11h 48mUnited Airlines
Sun 10/196:27 pmONT - CUN
1 stop16h 33mUnited Airlines
Deal found 9/11$336
This United Airlines deal was found by Cheapflights users on 9/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/258:39 amCUN - ONT
1 stop16h 13mUnited Airlines
Sat 1/35:05 amONT - CUN
2 stops31h 54mUnited Airlines
Deal found 9/10$346
This United Airlines deal was found by Cheapflights users on 9/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/254:51 pmCUN - ONT
1 stop8h 01mUnited Airlines
Fri 1/21:40 pmONT - CUN
2 stops20h 14mUnited Airlines
Deal found 9/10$362
This United Airlines deal was found by Cheapflights users on 9/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/167:51 amCUN - ONT
1 stop15h 33mUnited Airlines
Mon 10/206:36 pmONT - CUN
1 stop19h 36mUnited Airlines
Deal found 9/11$365
This Kiwi.com deal was found by Cheapflights users on 9/11. 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.
Fri 10/1711:16 amCUN - ONT
1 stop22h 33mMultiple Airlines
Tue 10/217:04 amONT - CUN
2 stops17h 29mMultiple Airlines
Deal found 9/11$367

Cheapflights Fare Finder

 
Customize your flight search to find flights from Cancún 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 September 11, 2025.
Use the filters below to find and compare flights from Cancún to Ontario that are best for you.

Fly from

Cancún

Fly to

Ontario

Route

Depart

Return

Price

CancúnOntario

CUN - ONT

CUNONT

Cancun

Wed 10/15

1:43 pm-9:24 pm

1 stop9h 41m

Ontario

Sat 10/18

6:36 pm-7:20 pm

2 stops22h 44m

$308

CancúnOntario

CUN - ONT

CUNONT

Cancun

Thu 10/23

12:25 pm-7:19 pm

1 stop8h 54m

Ontario

Mon 10/27

6:00 am-3:16 pm

1 stop7h 16m

$308

CancúnOntario

CUN - ONT

CUNONT

Cancun

Wed 11/26

8:39 am-9:49 pm

1 stop16h 10m

Ontario

Sun 11/30

6:05 am-3:59 pm

1 stop6h 54m

$308

CancúnOntario

CUN - ONT

CUNONT

Cancun

Wed 10/15

1:04 pm-10:52 pm

1 stop11h 48m

Ontario

Sun 10/19

6:00 am-2:37 pm

1 stop6h 37m

$308

CancúnOntario

CUN - ONT

CUNONT

Cancun

Thu 11/20

1:27 pm-10:31 pm

1 stop12h 04m

Ontario

Mon 11/24

6:05 am-8:18 pm

1 stop11h 13m

$308

CancúnOntario

CUN - ONT

CUNONT

Cancun

Wed 10/15

7:51 am-10:52 pm

2 stops17h 01m

Ontario

Tue 10/21

6:00 am-7:20 pm

1 stop11h 20m

$308

CancúnOntario

CUN - ONT

CUNONT

Cancun

Thu 11/13

1:37 pm-8:44 pm

1 stop10h 07m

Ontario

Tue 11/18

6:05 am-3:59 pm

1 stop6h 54m

$308

CancúnOntario

CUN - ONT

CUNONT

Cancun

Sat 10/25

7:51 am-10:52 pm

2 stops17h 01m

Ontario

Sat 11/1

6:38 pm-11:25 am

2 stops14h 47m

$319

CancúnOntario

CUN - ONT

CUNONT

Cancun

Thu 12/25

4:51 pm-9:52 pm

1 stop8h 01m

Ontario

Mon 1/5

6:00 am-6:55 pm

1 stop9h 55m

$329

CancúnOntario

CUN - ONT

CUNONT

Cancun

Thu 9/25

8:00 am-10:23 pm

1 stop16h 23m

$191

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/9

Showing 1-10 of 19 results
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Best time to book a flight from Cancún to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Cancún 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 Cancún to Ontario

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

Currently, August is the cheapest month in which you can book a flight from Cancún to Ontario (average of $246). Flying from Cancún to Ontario in March is currently the most expensive (average of $328). 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 CUN to ONT?

Find hourly flight availability from Cancún 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 September 11, 2025.

When flying from Cancún to Ontario, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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

Related info for your journey

Find useful and relevant information for your journey from Cancún to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Cancún to Ontario?

    United Airlines can get you from Cancún to Ontario in just under 9h 41m. Your travel time can differ by up to . Cancún and Ontario are separated by a distance of 2073 mi.

  • Can I find deals for flights from Cancún to Ontario that include hotel bookings?

    Yes. In addition to deals on Cancún to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Cancún to Ontario?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Cancún to Ontario.

  • Can I find deals for business class flights from Cancún to Ontario?

    Yes. Cheapflights offers flight deals from Cancún 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.

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

    Currently, August is the cheapest month in which you can book a flight from Cancún to Ontario (average of $246). Flying from Cancún to Ontario in March is currently the most expensive (average of $328). 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

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