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$465+ 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 10/29. Fares are subject to change and may not be available on all flights or dates of travel.
GRU — ONT
Nov 21 — Nov 281
Fri 11/21
Fri 11/28
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 October 22, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,078
(United Airlines)

One-way from

$465
(Mytrip)

Popular in

July

Cheapest in

November

Average price

$503
Provider with most accurate pricing for Sao Paulo (SAO)-Los Angeles flight deals.
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Provider most trusted by Cheapflights users for Sao Paulo (SAO)-Los Angeles flights.
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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. 12% potential increase in price ($82 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($24 potential savings vs. average RT price).
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Average for round-trip flights in October 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 October 22, 2025.

This United Airlines deal was found by Cheapflights users on 10/21. 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.
Wed 12/1710:15 pmGRU - ONT
1 stop28h 37mUnited Airlines
Tue 1/66:00 amONT - GRU
1 stop22h 30mUnited Airlines
Deal found 10/21$1,078
This United Airlines deal was found by Cheapflights users on 10/19. 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 12/1210:15 pmGRU - ONT
2 stops19h 03mUnited Airlines
Sat 1/246:00 amONT - GRU
2 stops22h 30mUnited Airlines
Deal found 10/19$1,178
This United Airlines deal was found by Cheapflights users on 10/20. 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 12/410:15 pmGRU - ONT
2 stops19h 17mUnited Airlines
Thu 12/111:34 pmONT - GRU
2 stops36h 41mUnited Airlines
Deal found 10/20$1,213
This United Airlines deal was found by Cheapflights users on 10/21. 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.
Thu 11/2710:15 pmGRU - ONT
2 stops19h 18mUnited Airlines
Thu 12/46:00 amONT - GRU
2 stops22h 30mUnited Airlines
Deal found 10/21$1,228
This United Airlines deal was found by Cheapflights users on 10/22. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/2010:15 pmGRU - ONT
2 stops19h 22mUnited Airlines
Sun 12/76:00 amONT - GRU
1 stop22h 30mUnited Airlines
Deal found 10/22$1,236
This Booking.com deal was found by Cheapflights users on 10/21. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/52:40 amGRU - ONT
2 stops23h 15mAvianca
Tue 11/1110:30 pmONT - GRU
2 stops19h 10mAvianca
Deal found 10/21$1,238
This FlightHub deal was found by Cheapflights users on 10/20. 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.
Mon 11/31:20 amGRU - ONT
2 stops24h 35mAvianca
Tue 11/1110:30 pmONT - GRU
2 stops19h 10mAvianca
Deal found 10/20$1,260
This United Airlines deal was found by Cheapflights users on 10/20. 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 11/2210:15 pmGRU - ONT
2 stops19h 18mUnited Airlines
Sat 11/296:00 amONT - GRU
2 stops22h 30mUnited Airlines
Deal found 10/20$1,284
This FlightHub deal was found by Cheapflights users on 10/20. 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.
Wed 11/52:40 amGRU - ONT
2 stops23h 15mAvianca
Thu 11/1310:30 pmONT - GRU
2 stops22h 05mAvianca
Deal found 10/20$1,293

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 October 22, 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

Wed 12/17

10:15 pm-9:52 pm

1 stop28h 37m

Ontario

Tue 1/6

6:00 am-9:30 am

1 stop22h 30m

$1,078

Sao PauloOntario

GRU - ONT

GRUONT

Sao Paulo Guarulhos Intl

Mon 2/2

10:15 pm-12:47 pm

2 stops19h 32m

Ontario

Tue 2/10

6:00 am-9:30 am

2 stops22h 30m

$1,078

Sao PauloOntario

GRU - ONT

GRUONT

Sao Paulo Guarulhos Intl

Wed 3/18

10:25 pm-8:45 pm

2 stops26h 20m

Ontario

Sun 3/22

11:50 pm-7:15 am

1 stop27h 25m

$1,131

Sao PauloOntario

GRU - ONT

GRUONT

Sao Paulo Guarulhos Intl

Wed 3/18

9:15 pm-9:14 pm

2 stops27h 59m

Ontario

Sun 3/22

10:30 pm-4:30 pm

2 stops38h 00m

$1,156

Sao PauloOntario

GRU - ONT

GRUONT

Sao Paulo Guarulhos Intl

Fri 12/12

10:15 pm-12:32 pm

2 stops19h 17m

Ontario

Sat 1/24

6:00 am-9:30 am

1 stop22h 30m

$1,178

Sao PauloOntario

GRU - ONT

GRUONT

Sao Paulo Guarulhos Intl

Tue 2/3

10:25 pm-12:47 pm

2 stops19h 22m

$577

Sao PauloOntario

GRU - ONT

GRUONT

Sao Paulo Guarulhos Intl

Fri 11/14

2:40 am-8:55 pm

2 stops23h 15m

$577

Sao PauloOntario

GRU - ONT

GRUONT

Sao Paulo Guarulhos Intl

Wed 2/18

10:15 pm-12:38 pm

2 stops19h 23m

$581

Sao PauloOntario

GRU - ONT

GRUONT

Sao Paulo Guarulhos Intl

Wed 11/26

5:25 pm-8:55 pm

2 stops32h 30m

$650

Sao PauloOntario

GRU - ONT

GRUONT

Sao Paulo Guarulhos Intl

Fri 11/7

2:40 am-8:55 pm

2 stops23h 15m

$653

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/21

Showing 1-10 of 16 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, October is the cheapest month in which you can book a flight from Sao Paulo Guarulhos Intl Airport to Ontario (average of $299). Flying from Sao Paulo Guarulhos Intl Airport to Ontario in August is currently the most expensive (average of $433). 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 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.

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

    Airlines like United Airlines fly from Sao Paulo Guarulhos Intl Airport to Ontario in about 28h 37m. The time it takes to get you to your destination can typically vary by up to . The distance between Sao Paulo Guarulhos Intl Airport and Ontario is about 6122 mi.

  • 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, October is the cheapest month in which you can book a flight from Sao Paulo Guarulhos Intl Airport to Ontario (average of $299). Flying from Sao Paulo Guarulhos Intl Airport to Ontario in August is currently the most expensive (average of $433). 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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