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$149+ Cheap flights from Mexico 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 8/14. Fares are subject to change and may not be available on all flights or dates of travel.
MEX — ONT
Jun 21 — Jun 281
Sat 6/21
Sat 6/28
1 adult, Economy
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Cheap flight deals from Mexico to Ontario

Keep the following information in mind while searching for Mexico to Ontario flight deals. Data was last updated June 16, 2025.

Round-trip from

$265
(United Airlines)

One-way from

$149
(Trip.com)

Popular in

December

Cheapest in

March

Average price

$324

Good round-trip deal

$192 or less

Good one-way deal

$180 or less
From Mexico to Ontario
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One-way flight from Mexico to Ontario
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Highest demand for flights based on searches. 10% potential increase in price ($39 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Price to beat on a round-trip flight from Mexico to Ontario.
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Price to beat on a one-way flight from Mexico to Ontario.
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Find flight deals from Mexico to Ontario

Cheapest flights from Mexico to Ontario
Explore the most affordable flight options available from Mexico to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 16, 2025.

This United Airlines deal was found by Cheapflights users on 6/15. 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 8/611:10 amSJD - ONT
1 stop6h 33mUnited Airlines
Sun 8/105:05 amONT - SJD
1 stop7h 05mUnited Airlines
Deal found 6/15$265
This Frontier deal was found by Cheapflights users on 6/15. 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 8/129:10 pmGDL - ONT
Nonstop3h 03mFrontier
Sat 8/161:09 amONT - GDL
Nonstop3h 05mFrontier
Deal found 6/15$274
This eDestinos deal was found by Cheapflights users on 6/15. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/29:10 pmGDL - ONT
Nonstop3h 03mVolaris
Wed 7/169:11 pmONT - GDL
Nonstop3h 05mVolaris
Deal found 6/15$281
This Priceline deal was found by Cheapflights users on 6/15. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/213:25 pmCUN - ONT
1 stop10h 25mFrontier
Fri 6/2712:59 amONT - CUN
1 stop13h 23mFrontier
Deal found 6/15$290
This Booking.com deal was found by Cheapflights users on 6/15. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/313:54 pmSJD - ONT
Nonstop2h 25mVolaris
Mon 8/412:40 pmONT - SJD
Nonstop2h 24mVolaris
Deal found 6/15$291
This CheapOair deal was found by Cheapflights users on 6/16. 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.
Thu 11/69:28 amBJX - ONT
Nonstop3h 32mVolaris
Fri 11/1411:59 pmONT - BJX
Nonstop2h 58mVolaris
Deal found 6/16$306
This United Airlines deal was found by Cheapflights users on 6/13. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/154:15 pmCUN - ONT
1 stop8h 37mUnited Airlines
Wed 7/235:05 amONT - CUN
1 stop9h 40mUnited Airlines
Deal found 6/13$307
This Delta deal was found by Cheapflights users on 6/15. 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.
Tue 8/123:50 pmGDL - ONT
1 stop8h 50mDelta
Sun 8/176:05 amONT - GDL
1 stop6h 09mDelta
Deal found 6/15$311
This United Airlines deal was found by Cheapflights users on 6/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/2012:30 pmGDL - ONT
2 stops11h 15mUnited Airlines
Mon 6/306:00 amONT - GDL
1 stop14h 34mUnited Airlines
Deal found 6/14$312
This Booking.com deal was found by Cheapflights users on 6/14. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/288:35 amMLM - ONT
Nonstop3h 25mVolaris
Thu 8/2811:53 pmONT - MLM
Nonstop3h 07mVolaris
Deal found 6/14$312
This United Airlines deal was found by Cheapflights users on 6/15. 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 9/1112:25 pmPVR - ONT
2 stops24h 48mUnited Airlines
Sun 9/216:00 amONT - PVR
2 stops28h 27mUnited Airlines
Deal found 6/15$340
This United Airlines deal was found by Cheapflights users on 6/15. 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 8/1411:45 amBJX - ONT
2 stops12h 07mUnited Airlines
Sun 8/176:31 pmONT - BJX
2 stops15h 18mUnited Airlines
Deal found 6/15$342

Cheapflights Fare Finder

Customize your flight search to find flights from Mexico 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 16, 2025.
Use the filters below to find and compare flights from Mexico to Ontario that are best for you.

Fly from

Mexico

Fly to

Ontario

Route

Depart

Return

Price

San José del CaboOntario

SJD - ONT

SJDONT

San José del Cabo Los Cabos

Wed 8/6

11:10 am-5:43 pm

1 stop6h 33m

Ontario

Sun 8/10

5:05 am-12:10 pm

1 stop7h 05m

$265

GuadalajaraOntario

GDL - ONT

GDLONT

Guadalajara Miguel Hidal

Tue 8/12

9:10 pm-11:13 pm

Nonstop3h 03m

Ontario

Sat 8/16

1:09 am-5:14 am

Nonstop3h 05m

$274

GuadalajaraOntario

GDL - ONT

GDLONT

Guadalajara Miguel Hidal

Wed 7/2

9:10 pm-11:13 pm

Nonstop3h 03m

Ontario

Wed 7/16

9:11 pm-1:16 am

Nonstop3h 05m

$281

San José del CaboOntario

SJD - ONT

SJDONT

San José del Cabo Los Cabos

Thu 7/31

3:54 pm-6:19 pm

Nonstop2h 25m

Ontario

Mon 8/4

12:40 pm-3:04 pm

Nonstop2h 24m

$291

LeónOntario

BJX - ONT

BJXONT

León Del Bajio

Thu 11/6

9:28 am-11:00 am

Nonstop3h 32m

Ontario

Fri 11/14

11:59 pm-4:57 am

Nonstop2h 58m

$306

CancúnOntario

CUN - ONT

CUNONT

Cancun

Tue 7/15

4:15 pm-10:52 pm

1 stop8h 37m

Ontario

Wed 7/23

5:05 am-4:45 pm

1 stop9h 40m

$307

GuadalajaraOntario

GDL - ONT

GDLONT

Guadalajara Miguel Hidal

Tue 8/12

3:50 pm-11:40 pm

1 stop8h 50m

Ontario

Sun 8/17

6:05 am-1:14 pm

1 stop6h 09m

$311

MoreliaOntario

MLM - ONT

MLMONT

Morelia

Mon 7/28

8:35 am-11:00 am

Nonstop3h 25m

Ontario

Thu 8/28

11:53 pm-4:00 am

Nonstop3h 07m

$312

CancúnOntario

CUN - ONT

CUNONT

Cancun

Wed 7/30

3:25 pm-11:50 pm

1 stop10h 25m

Ontario

Tue 8/5

12:59 am-4:20 pm

1 stop13h 21m

$322

Puerto VallartaOntario

PVR - ONT

PVRONT

Puerto Vallarta Ordaz

Thu 9/11

12:25 pm-12:13 pm

2 stops24h 48m

Ontario

Sun 9/21

6:00 am-11:27 am

2 stops28h 27m

$340

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/14

Showing 1-10 of 60 results
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Best time to book a flight from Mexico to Ontario

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

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

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

Find hourly flight availability from Mexico 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 16, 2025.

When flying from Mexico 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.

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 16, 2025.
See what other customers who have flown with Delta, Alaska Airlines and Southwest from Mexico to Ontario have to say. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,963 reviews

Crew

8.5

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Overall

8.0

Food

7.3

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
7,963 reviews
Delta
8.0
Very good
7,963 reviews

Crew

8.5

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Overall

8.0

Food

7.3

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
Alaska Airlines
8.0
Very good
10,000 reviews
Delta
8.0
Very good
7,963 reviews

Crew

8.5

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Overall

8.0

Food

7.3

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
Southwest
8.0
Very good
4,278 reviews
Delta
8.0
Very good
7,963 reviews

Crew

8.5

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Overall

8.0

Food

7.3

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
Finnair
7.6
Good
1,291 reviews
Delta
8.0
Very good
7,963 reviews

Crew

8.5

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Overall

8.0

Food

7.3

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
1,711 reviews
Delta
8.0
Very good
7,963 reviews

Crew

8.5

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Overall

8.0

Food

7.3

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 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 Mexico?

    Most people fly into Ontario (ONT) if they book a flight to Ontario from Mexico. Ontario is conveniently located just 3.1 mi from Ontario’s city center.

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

    The cheapest airlines for a one-way flight from Mexico to Ontario are Volaris ($149), Frontier ($174), and United Airlines ($177).

  • What are the most popular routes from Mexico to Ontario?

    While some choose either Monterrey Gen Mariano Escobedo - Ontario or Guadalajara Miguel Hidal - Ontario, Mexico City Benito Juarez - Ontario is the most popular route from Mexico to Ontario.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Mexico 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 to Ontario?

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

See prices for flight routes from nearby airports that may be better suited for you.
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Top 2 airlines flying from Mexico to Ontario

Discover the top 2 airlines that operate flights from Mexico 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 June 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
VolarisCheapest$226Average$334FlexibilityNo cancel feeOn-time79%
FrontierCheapest$245Average$300FlexibilityNo cancel feeOn-time62%

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