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$178+ Cheap flights from Mexico City (MEX) 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 1/28. Fares are subject to change and may not be available on all flights or dates of travel.
MEX — ONT
Aug 19 — Aug 261
Tue 8/19
Tue 8/26
1 adult, Economy
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Cheap flight deals from Mexico City to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Mexico City (MEX) 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 August 14, 2025.

Round-trip from

$275
(Mytrip)

One-way from

$178
(CheapOair)

Popular in

November

Cheapest in

January

Average price

$432
From Mexico City Benito Juarez to Ontario
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One-way flight from Mexico City Benito Juarez to Ontario
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Highest demand for flights based on searches. 13% potential increase in price ($72 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Find flight deals from Mexico City to Ontario

Cheapest flights from Mexico City to Ontario
Explore the most affordable flight options available from Mexico City to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 14, 2025.

This Mytrip deal was found by Cheapflights users on 8/14. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1210:00 amMEX - ONT
1 stop10h 21mVolaris
Sun 9/1412:40 pmONT - MEX
1 stop10h 05mVolaris
Deal found 8/14$275
This Mytrip deal was found by Cheapflights users on 8/13. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/274:30 pmMEX - ONT
1 stop7h 43mVolaris
Sat 10/412:40 pmONT - MEX
1 stop10h 05mVolaris
Deal found 8/13$288
This Flightnetwork deal was found by Cheapflights users on 8/13. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/124:30 pmMEX - ONT
1 stop7h 43mVolaris
Fri 9/199:11 pmONT - MEX
1 stop11h 29mVolaris
Deal found 8/13$310
This Frontier deal was found by Cheapflights users on 8/14. 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 10/1411:45 amMEX - ONT
1 stop9h 57mFrontier
Fri 10/2412:32 pmONT - MEX
1 stop8h 28mFrontier
Deal found 8/14$314
This Frontier deal was found by Cheapflights users on 8/13. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/67:00 amMEX - ONT
1 stop9h 47mFrontier
Mon 11/1012:40 pmONT - MEX
1 stop7h 20mFrontier
Deal found 8/13$315
This CheapOair deal was found by Cheapflights users on 8/14. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/174:30 pmMEX - ONT
1 stop7h 43mVolaris
Mon 10/2012:40 pmONT - MEX
1 stop10h 05mVolaris
Deal found 8/14$316
This CheapOair deal was found by Cheapflights users on 8/13. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/174:30 pmMEX - ONT
1 stop7h 43mVolaris
Sat 10/181:09 amONT - MEX
1 stop7h 31mVolaris
Deal found 8/13$318
This Mytrip deal was found by Cheapflights users on 8/14. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/229:00 amMEX - ONT
1 stop10h 19mVolaris
Fri 9/2612:40 pmONT - MEX
1 stop10h 05mVolaris
Deal found 8/14$323
This Frontier deal was found by Cheapflights users on 8/14. 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.
Thu 9/258:10 amMEX - ONT
1 stop12h 44mFrontier
Wed 10/298:00 amONT - MEX
1 stop12h 10mFrontier
Deal found 8/14$328

Cheapflights Fare Finder

 
Customize your flight search to find flights from Mexico City 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 August 14, 2025.
Use the filters below to find and compare flights from Mexico City to Ontario that are best for you.

Fly from

Mexico City

Fly to

Ontario

Route

Depart

Return

Price

Mexico CityOntario

MEX - ONT

MEXONT

Mexico City Benito Juarez

Fri 9/12

10:00 am-7:21 pm

1 stop10h 21m

Ontario

Sun 9/14

12:40 pm-11:45 pm

1 stop10h 05m

$275

Mexico CityOntario

MEX - ONT

MEXONT

Mexico City Benito Juarez

Sat 9/27

4:30 pm-11:13 pm

1 stop7h 43m

Ontario

Sat 10/4

12:40 pm-11:45 pm

1 stop10h 05m

$288

Mexico CityOntario

MEX - ONT

MEXONT

Mexico City Benito Juarez

Fri 9/12

4:30 pm-11:13 pm

1 stop7h 43m

Ontario

Fri 9/19

9:11 pm-9:40 am

1 stop11h 29m

$310

Mexico CityOntario

MEX - ONT

MEXONT

Mexico City Benito Juarez

Tue 10/14

11:45 am-8:42 pm

1 stop9h 57m

Ontario

Fri 10/24

12:32 pm-10:00 pm

1 stop8h 28m

$314

Mexico CityOntario

MEX - ONT

MEXONT

Mexico City Benito Juarez

Thu 11/6

7:00 am-2:47 pm

1 stop9h 47m

Ontario

Mon 11/10

12:40 pm-10:00 pm

1 stop7h 20m

$315

Mexico CityOntario

MEX - ONT

MEXONT

Mexico City Benito Juarez

Fri 10/17

4:30 pm-11:13 pm

1 stop7h 43m

Ontario

Mon 10/20

12:40 pm-11:45 pm

1 stop10h 05m

$316

Mexico CityOntario

MEX - ONT

MEXONT

Mexico City Benito Juarez

Fri 9/12

4:30 pm-11:13 pm

1 stop7h 43m

Ontario

Mon 9/15

12:40 pm-11:45 pm

1 stop10h 05m

$319

Mexico CityOntario

MEX - ONT

MEXONT

Mexico City Benito Juarez

Wed 1/28

2:10 pm-6:44 pm

1 stop6h 34m

$178

Mexico CityOntario

MEX - ONT

MEXONT

Mexico City Benito Juarez

Wed 10/15

4:30 pm-11:13 pm

1 stop7h 43m

$180

Mexico CityOntario

MEX - ONT

MEXONT

Mexico City Benito Juarez

Fri 9/5

4:30 pm-11:13 pm

1 stop7h 43m

$180

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/14

Showing 1-10 of 17 results
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Best time to book a flight from Mexico City to Ontario

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

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

Currently, August is the cheapest month in which you can book a flight from Mexico City to Ontario (average of $246). Flying from Mexico City 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.

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

Related info for your journey

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

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

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

  • How can I find direct flights from Mexico City to Ontario?

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

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

    Yes. Cheapflights offers flight deals from Mexico City 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 Mexico City to Ontario?

    Currently, August is the cheapest month in which you can book a flight from Mexico City to Ontario (average of $246). Flying from Mexico City 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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