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$466+ Cheap flights from Guarulhos Intl, Brazil (GRU) 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 8/1. Fares are subject to change and may not be available on all flights or dates of travel.
GRU — ONT
Jun 28 — Jul 51
Sat 6/28
Sat 7/5
1 adult, Economy
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Cheap flight deals from Guarulhos Intl to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Guarulhos Intl (GRU) 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 23, 2025.

Round-trip from

$1,032
(Priceline)

One-way from

$466
(Mytrip)

Popular in

December

Cheapest in

November

Average price

$677
From Sao Paulo Guarulhos Intl to Ontario
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One-way flight from Sao Paulo Guarulhos Intl to Ontario
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Highest demand for flights based on searches. 9% potential increase in price ($68 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($23 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 Guarulhos Intl to Ontario

Cheapest flights from Guarulhos Intl to Ontario
Explore the most affordable flight options available from Guarulhos Intl to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 23, 2025.

This Priceline deal was found by Cheapflights users on 6/22. 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.
Tue 9/234:10 amGRU - ONT
2 stops21h 45mAvianca
Tue 10/711:25 pmONT - GRU
2 stops22h 45mAvianca
Deal found 6/22$1,032
This LATAM Airlines deal was found by Cheapflights users on 6/22. 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 LATAM Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2210:05 amGRU - ONT
1 stop16h 36mLATAM Airlines
Wed 10/2912:00 pmONT - GRU
1 stop17h 35mLATAM Airlines
Deal found 6/22$1,035
This United Airlines deal was found by Cheapflights users on 6/21. 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.
Mon 11/1010:15 pmGRU - ONT
2 stops19h 18mUnited Airlines
Sat 11/227:00 amONT - GRU
1 stop19h 15mUnited Airlines
Deal found 6/21$1,069
This Mytrip deal was found by Cheapflights users on 6/22. 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.
Tue 7/14:50 pmGRU - ONT
3 stops34h 23mMultiple Airlines
Sun 7/61:09 amONT - GRU
3 stops24h 26mMultiple Airlines
Deal found 6/22$1,222
This Delta deal was found by Cheapflights users on 6/22. 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.
Wed 8/610:50 pmGRU - ONT
1 stop15h 40mDelta
Wed 8/137:05 amONT - GRU
1 stop18h 35mDelta
Deal found 6/22$1,226
This American Airlines deal was found by Cheapflights users on 6/21. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/510:00 pmGRU - ONT
1 stop16h 01mAmerican Airlines
Thu 7/178:15 amONT - GRU
1 stop19h 00mAmerican Airlines
Deal found 6/21$1,709

Cheapflights Fare Finder

Customize your flight search to find flights from Guarulhos Intl 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 23, 2025.
Use the filters below to find and compare flights from Sao Paulo Guarulhos Intl Airport to Ontario that are best for you.

Fly from

Guarulhos Intl

Fly to

Ontario

Route

Depart

Return

Price

Sao PauloOntario

GRU - ONT

GRUONT

Sao Paulo Guarulhos Intl

Tue 9/23

4:10 am-9:55 pm

2 stops21h 45m

Ontario

Tue 10/7

11:25 pm-2:10 am

2 stops22h 45m

$1,032

Sao PauloOntario

GRU - ONT

GRUONT

Sao Paulo Guarulhos Intl

Wed 10/22

10:05 am-10:41 pm

1 stop16h 36m

Ontario

Wed 10/29

12:00 pm-9:35 am

1 stop17h 35m

$1,035

Sao PauloOntario

GRU - ONT

GRUONT

Sao Paulo Guarulhos Intl

Mon 11/10

10:15 pm-12:33 pm

2 stops19h 18m

Ontario

Sat 11/22

5:40 am-9:30 am

2 stops22h 50m

$1,069

Sao PauloOntario

GRU - ONT

GRUONT

Sao Paulo Guarulhos Intl

Wed 8/6

10:50 pm-10:30 am

1 stop15h 40m

Ontario

Wed 8/13

7:05 am-5:40 am

1 stop18h 35m

$1,226

Sao PauloOntario

GRU - ONT

GRUONT

Sao Paulo Guarulhos Intl

Sun 7/20

9:50 pm-9:37 pm

1 stop27h 47m

Ontario

Sun 8/3

11:25 pm-2:10 am

2 stops22h 45m

$1,258

Sao PauloOntario

GRU - ONT

GRUONT

Sao Paulo Guarulhos Intl

Sat 7/5

10:00 pm-10:01 am

1 stop16h 01m

Ontario

Thu 7/17

8:15 am-7:15 am

1 stop19h 00m

$1,709

Sao PauloOntario

GRU - ONT

GRUONT

Sao Paulo Guarulhos Intl

Fri 8/1

4:10 am-11:13 pm

3 stops23h 03m

$466

Sao PauloOntario

GRU - ONT

GRUONT

Sao Paulo Guarulhos Intl

Tue 9/9

7:20 am-9:55 pm

2 stops18h 35m

$499

Sao PauloOntario

GRU - ONT

GRUONT

Sao Paulo Guarulhos Intl

Mon 11/10

10:15 pm-12:33 pm

2 stops19h 18m

$577

Sao PauloOntario

GRU - ONT

GRUONT

Sao Paulo Guarulhos Intl

Mon 11/10

11:45 pm-10:41 pm

1 stop27h 56m

$609

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/21

Showing 1-10 of 13 results
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Best time to book a flight from Guarulhos Intl to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Guarulhos Intl 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 Sao Paulo Guarulhos Intl Airport to Ontario

What is the cheapest month to book a flight from Sao Paulo Guarulhos Intl Airport to Ontario?

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

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 23, 2025.
To help decide which airline to fly from Sao Paulo to Ontario, see what other customers have to say about Delta, LATAM Airlines and United Airlines. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,962 reviews

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Comfort

7.9

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
7,962 reviews
Delta
8.0
Very good
7,962 reviews

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Comfort

7.9

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
LATAM Airlines
7.5
Good
1,790 reviews
Delta
8.0
Very good
7,962 reviews

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Comfort

7.9

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
8,830 reviews
Delta
8.0
Very good
7,962 reviews

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Comfort

7.9

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
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,962 reviews

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Comfort

7.9

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
9,604 reviews
Delta
8.0
Very good
7,962 reviews

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Comfort

7.9

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 Guarulhos Intl 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 Sao Paulo Guarulhos Intl?

    Located just 3.1 mi from the city center, Ontario is the airport most travelers will use when flying to Ontario from Sao Paulo Guarulhos Intl. Booking flights from Sao Paulo Guarulhos Intl to Ontario (ONT) should be relatively easy as there are 0 daily inbound flights from Sao Paulo Guarulhos Intl from 0 different airlines.

  • What are the cheapest airlines to fly from Sao Paulo Guarulhos Intl Airport to Ontario one-way?

    The cheapest airlines for a one-way flight from Sao Paulo Guarulhos Intl Airport to Ontario are Avianca ($499), United Airlines ($577), and LATAM Airlines ($609).

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

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

  • How can I find direct flights from Guarulhos Intl to Ontario?

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

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

    Yes. Cheapflights offers flight deals from Guarulhos Intl 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 Sao Paulo Guarulhos Intl Airport to Ontario?

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

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