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$186+ 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 8/25. Fares are subject to change and may not be available on all flights or dates of travel.
MEX — ONT
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$367
(FlightHub)

One-way from

$186
(Trip.com)

Popular in

October

Cheapest in

January

Average price

$433
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 ($79 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($18 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 12, 2025.

This FlightHub deal was found by Cheapflights users on 6/12. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/209:00 amMEX - ONT
1 stop10h 19mVolaris
Sat 9/279:11 pmONT - MEX
1 stop11h 29mVolaris
Deal found 6/12$367
This Frontier deal was found by Cheapflights users on 6/10. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/273:45 pmMEX - ONT
1 stop8h 47mFrontier
Tue 10/288:00 amONT - MEX
1 stop12h 10mFrontier
Deal found 6/10$371
This Kiwi.com deal was found by Cheapflights users on 6/11. 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 8/56:00 amMEX - ONT
2 stops11h 20mMultiple Airlines
Fri 8/81:09 amONT - MEX
1 stop7h 31mMultiple Airlines
Deal found 6/11$431
This United Airlines deal was found by Cheapflights users on 6/11. 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.
Tue 7/295:05 amMEX - ONT
1 stop8h 09mUnited Airlines
Thu 8/75:05 amONT - MEX
2 stops17h 05mUnited Airlines
Deal found 6/11$494
This Avianca deal was found by Cheapflights users on 6/10. 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 Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/194:55 amMEX - ONT
2 stops18h 00mAvianca
Sun 8/2411:25 pmONT - MEX
1 stop10h 30mAvianca
Deal found 6/10$503
This Delta deal was found by Cheapflights users on 6/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/191:00 pmMEX - ONT
2 stops11h 17mDelta
Wed 7/236:00 amONT - MEX
2 stops11h 00mDelta
Deal found 6/11$512

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 June 12, 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

Sat 9/20

9:00 am-6:19 pm

1 stop10h 19m

Ontario

Sat 9/27

9:11 pm-9:40 am

1 stop11h 29m

$367

Mexico CityOntario

MEX - ONT

MEXONT

Mexico City Benito Juarez

Sat 9/27

3:45 pm-11:32 pm

1 stop8h 47m

Ontario

Tue 10/28

8:00 am-9:10 pm

1 stop12h 10m

$371

Mexico CityOntario

MEX - ONT

MEXONT

Mexico City Benito Juarez

Tue 8/5

6:00 am-4:20 pm

2 stops11h 20m

Ontario

Fri 8/8

1:09 am-9:40 am

1 stop7h 31m

$431

Mexico CityOntario

MEX - ONT

MEXONT

Mexico City Benito Juarez

Tue 7/29

9:35 am-8:54 pm

2 stops12h 19m

Ontario

Sun 8/10

6:39 pm-8:35 am

2 stops12h 56m

$494

Mexico CityOntario

MEX - ONT

MEXONT

Mexico City Benito Juarez

Tue 8/19

4:55 am-9:55 pm

2 stops18h 00m

Ontario

Sun 8/24

11:25 pm-10:55 am

1 stop10h 30m

$503

Mexico CityOntario

MEX - ONT

MEXONT

Mexico City Benito Juarez

Tue 8/5

9:25 am-10:27 pm

2 stops14h 02m

Ontario

Fri 8/8

6:00 am-4:00 pm

2 stops9h 00m

$512

Mexico CityOntario

MEX - ONT

MEXONT

Mexico City Benito Juarez

Mon 8/25

9:00 am-6:19 pm

1 stop10h 19m

$186

Mexico CityOntario

MEX - ONT

MEXONT

Mexico City Benito Juarez

Mon 11/10

11:45 am-8:54 pm

1 stop11h 09m

$222

Mexico CityOntario

MEX - ONT

MEXONT

Mexico City Benito Juarez

Tue 7/1

6:00 am-4:18 pm

2 stops11h 18m

$265

Mexico CityOntario

MEX - ONT

MEXONT

Mexico City Benito Juarez

Sat 7/5

4:40 am-9:55 pm

3 stops18h 15m

$282

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

Showing 1-10 of 14 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.

What is the cheapest time of day to fly from MEX to ONT?

Find hourly flight availability from Mexico City 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 June 12, 2025.

A simple way to save on the total cost of your ticket is to fly from Mexico City to Ontario in the morning. If you’re flexible enough to do this you can expect to save up to 15% on your trip compared to booking a flight at noon.

Rainfall in Ontario by month

Plan your trip to Ontario by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Ontario ranges from 0.1 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. June is typically the driest time to visit Ontario when rainfall is around 0.1 in.

Temperature in Ontario by month

Plan your trip to Ontario by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 53.6 F).

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 June 12, 2025.
Read reviews from past customers who have flown Delta, Aeromexico and United Airlines from Mexico City to Ontario. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,946 reviews

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very good
7,946 reviews
Delta
8.0
Very good
7,946 reviews

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Aeromexico
7.5
Good
1,706 reviews
Delta
8.0
Very good
7,946 reviews

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
United Airlines
7.4
Good
8,790 reviews
Delta
8.0
Very good
7,946 reviews

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Air Canada
7.1
Good
9,537 reviews
Delta
8.0
Very good
7,946 reviews

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Avianca
6.7
Okay
2,345 reviews
Delta
8.0
Very good
7,946 reviews

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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.

  • What are the cheapest airlines flying from Mexico City to Ontario round-trip?

    Volaris, at $367, was found to be the cheapest airline from Mexico City to Ontario.Alternate airlines to your destination round-trip include Frontier and United Airlines. Volaris is priced at 24% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest airlines to fly from Mexico City to Ontario one-way?

    The cheapest airline one-way is Volaris, with whom users have recently found tickets for as low as $186. However, be on the lookout for offers from Frontier and Avianca, as they are both options that can get you from Mexico City to Ontario for a low price.

  • 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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Alternative routes for Mexico City to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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