HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Guarulhos Intl

$421+ Cheap flights from Ontario (ONT) to Guarulhos Intl, Brazil (GRU)

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 4/15. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — GRU
Feb 24 — Mar 31
Tue 2/24
Tue 3/3
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to Guarulhos Intl with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Ontario to Guarulhos Intl

Cheapest flights from Ontario to Guarulhos Intl
Explore the most affordable flight options available from Ontario to Guarulhos Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 25, 2026.

This United Airlines deal was found by Cheapflights users on 1/23. 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 4/136:05 am
ONT
-
GRU
1 stop20h 40m
United Airlines
Wed 4/229:50 pm
GRU
-
ONT
2 stops18h 24m
United Airlines
Deal found 1/23$1,117
This Mytrip deal was found by Cheapflights users on 1/24. 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 3/2811:02 pm
ONT
-
GRU
3 stops25h 15m
Multiple Airlines
Sat 4/44:10 am
GRU
-
ONT
3 stops22h 55m
Multiple Airlines
Deal found 1/24$1,193
This Delta deal was found by Cheapflights users on 1/22. 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.
Fri 7/317:00 am
ONT
-
GRU
2 stops20h 50m
Delta
Fri 8/2811:00 pm
GRU
-
ONT
2 stops23h 01m
Delta
Deal found 1/22$1,197
This United Airlines deal was found by Cheapflights users on 1/23. 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 4/136:05 am
ONT
-
GRU
1 stop20h 40m
United Airlines
Fri 4/2410:20 pm
GRU
-
ONT
2 stops18h 18m
United Airlines
Deal found 1/23$1,242
This Mytrip deal was found by Cheapflights users on 1/23. 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 3/2711:02 pm
ONT
-
GRU
3 stops24h 08m
Multiple Airlines
Sun 4/54:10 am
GRU
-
ONT
3 stops22h 55m
Multiple Airlines
Deal found 1/23$1,285
This American Airlines deal was found by Cheapflights users on 1/22. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/3012:59 am
ONT
-
GRU
1 stop28h 01m
American Airlines
Fri 8/2810:00 pm
GRU
-
ONT
1 stop17h 53m
American Airlines
Deal found 1/22$1,294
This Mytrip deal was found by Cheapflights users on 1/25. 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.
Wed 1/2811:59 pm
ONT
-
GRU
3 stops32h 26m
Multiple Airlines
Sat 2/76:00 am
GRU
-
ONT
3 stops21h 52m
Multiple Airlines
Deal found 1/25$1,296
This United Airlines deal was found by Cheapflights users on 1/24. 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 3/281:50 pm
ONT
-
GRU
2 stops36h 55m
United Airlines
Sat 4/49:50 pm
GRU
-
ONT
2 stops26h 46m
United Airlines
Deal found 1/24$1,303
This Priceline deal was found by Cheapflights users on 1/24. 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.
Thu 5/2111:35 pm
ONT
-
GRU
2 stops26h 00m
Multiple Airlines
Tue 5/2610:50 pm
GRU
-
ONT
1 stop23h 25m
Multiple Airlines
Deal found 1/24$1,307
This American Airlines deal was found by Cheapflights users on 1/23. 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.
Thu 5/219:12 am
ONT
-
GRU
2 stops16h 43m
American Airlines
Tue 6/911:15 pm
GRU
-
ONT
2 stops24h 37m
American Airlines
Deal found 1/23$1,317
This United Airlines deal was found by Cheapflights users on 1/23. 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 3/316:05 am
ONT
-
GRU
1 stop20h 40m
United Airlines
Fri 4/1010:20 pm
GRU
-
ONT
2 stops18h 18m
United Airlines
Deal found 1/23$1,329

Find flight deals from Ontario to Guarulhos Intl

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Guarulhos Intl (GRU). 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 January 25, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

Ovago
2 stars

Round-trip from

$1,117
(United Airlines)

One-way from

$421
(Mytrip)

Popular in

December

Cheapest in

September

Average price

$680
Provider with most accurate pricing for Ontario-Sao Paulo Guarulhos Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Ontario-Sao Paulo Guarulhos Intl flights.
Search Deals
From Ontario to Sao Paulo Guarulhos Intl
Search Deals
One-way flight from Ontario to Sao Paulo Guarulhos Intl
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($66 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($17 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Guarulhos Intl 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 January 25, 2026.
Use the filters below to find and compare flights from Ontario to Sao Paulo Guarulhos Intl Airport that are best for you.

Fly from

Ontario

Fly to

Guarulhos Intl

Route

Depart

Return

Price

OntarioSao Paulo

ONT - GRU

ONTGRU

Ontario

Mon 4/13

6:05 am-6:45 am

1 stop20h 40m

Sao Paulo Guarulhos Intl

Tue 4/21

9:50 pm-12:14 pm

2 stops18h 24m

$1,117

OntarioSao Paulo

ONT - GRU

ONTGRU

Ontario

Mon 5/25

6:02 am-6:30 am

1 stop20h 28m

Sao Paulo Guarulhos Intl

Tue 6/2

9:50 pm-12:20 pm

2 stops18h 30m

$1,117

OntarioSao Paulo

ONT - GRU

ONTGRU

Ontario

Mon 4/13

6:05 am-6:45 am

1 stop20h 40m

Sao Paulo Guarulhos Intl

Wed 4/22

9:50 pm-12:14 pm

2 stops18h 24m

$1,117

OntarioSao Paulo

ONT - GRU

ONTGRU

Ontario

Fri 3/27

11:02 pm-3:10 am

3 stops24h 08m

Sao Paulo Guarulhos Intl

Sun 4/5

4:10 am-11:05 pm

3 stops22h 55m

$1,285

OntarioSao Paulo

ONT - GRU

ONTGRU

Ontario

Sat 3/28

1:50 pm-6:45 am

2 stops36h 55m

Sao Paulo Guarulhos Intl

Sat 4/4

9:50 pm-8:36 pm

2 stops26h 46m

$1,303

OntarioSao Paulo

ONT - GRU

ONTGRU

Ontario

Thu 5/21

11:35 pm-2:10 am

2 stops22h 35m

Sao Paulo Guarulhos Intl

Tue 5/26

10:50 pm-6:15 pm

1 stop23h 25m

$1,307

OntarioSao Paulo

ONT - GRU

ONTGRU

Ontario

Mon 2/16

6:00 am-9:30 am

1 stop22h 30m

Sao Paulo Guarulhos Intl

Mon 2/23

10:15 pm-12:43 pm

2 stops19h 28m

$1,307

OntarioSao Paulo

ONT - GRU

ONTGRU

Ontario

Thu 5/21

9:12 am-5:55 am

2 stops16h 43m

Sao Paulo Guarulhos Intl

Tue 6/9

11:15 pm-7:52 pm

2 stops24h 37m

$1,317

OntarioSao Paulo

ONT - GRU

ONTGRU

Ontario

Thu 4/16

6:00 am-6:45 am

2 stops20h 45m

Sao Paulo Guarulhos Intl

Sun 4/26

9:50 pm-12:14 pm

2 stops18h 24m

$1,329

OntarioSao Paulo

ONT - GRU

ONTGRU

Ontario

Tue 3/31

11:05 am-9:45 am

2 stops18h 40m

Sao Paulo Guarulhos Intl

Fri 4/10

10:20 pm-12:38 pm

2 stops18h 18m

$1,329

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/24

Showing 1-10 of 21 results
1
2
3

Compare providers for flights from Ontario to Guarulhos Intl

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Guarulhos Intl in January.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
OvagoPrice Accuracy2 starsTrust Score*2 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Ontario-Sao Paulo Guarulhos Intl Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Sao Paulo Guarulhos Intl Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-Sao Paulo Guarulhos Intl Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Ontario-Sao Paulo Guarulhos Intl Airport flights, Cheapflights users trust Ovago the most. Ovago has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Sao Paulo Guarulhos Intl Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Ontario to Guarulhos Intl

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

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

Currently, May is the cheapest month in which you can book a flight from Ontario to Sao Paulo Guarulhos Intl Airport (average of $418). Flying from Ontario to Sao Paulo Guarulhos Intl Airport in December is currently the most expensive (average of $499). 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.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Guarulhos Intl. 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 from for flights from Ontario to Sao Paulo Guarulhos Intl?

    Ontario (ONT) is the airport you will fly out of if you book a flight from Ontario to Sao Paulo Guarulhos Intl. You should not have trouble finding flights to Sao Paulo Guarulhos Intl from Ontario; the airport handles an average of 0 outbound flights to Sao Paulo Guarulhos Intl per day. You should also have plenty of airline options to choose from since 0 airlines have flights from the Ontario airport to Sao Paulo Guarulhos Intl. It is only a 3.1 mi journey to Ontario (ONT) from Ontario’s city center.

  • How long is the flight from Ontario to Sao Paulo Guarulhos Intl Airport?

    For as low as $1,117, United Airlines can have you in Sao Paulo Guarulhos Intl Airport from Ontario in 20h 40m. The distance from Ontario to Sao Paulo Guarulhos Intl Airport is about 6122 mi.

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

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

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

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

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

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

    Currently, May is the cheapest month in which you can book a flight from Ontario to Sao Paulo Guarulhos Intl Airport (average of $418). Flying from Ontario to Sao Paulo Guarulhos Intl Airport in December is currently the most expensive (average of $499). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.