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$485+ 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 5/19. Fares are subject to change and may not be available on all flights or dates of travel.
GRU — ONT
Apr 2 — Apr 91
Wed 4/2
Wed 4/9
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 March 28, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
1 star

Round-trip from

$888
(United Airlines)

One-way from

$485
(United Airlines)

Popular in

July

Cheapest in

November

Average price

$560
Provider with most accurate pricing for Sao Paulo Guarulhos Intl-Ontario flight deals.
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Provider most trusted by Cheapflights users for Sao Paulo Guarulhos Intl-Ontario 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 ($94 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 March 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 March 28, 2025.

This United Airlines deal was found by Cheapflights users on 3/27. 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 5/99:50 pmGRU - ONT
2 stops21h 26mUnited Airlines
Thu 5/156:08 amONT - GRU
1 stop21h 27mUnited Airlines
Deal found 3/27$888
This Booking.com deal was found by Cheapflights users on 3/27. 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.
Tue 9/237:20 amGRU - ONT
2 stops18h 35mAvianca
Thu 9/2511:25 pmONT - GRU
2 stops21h 15mAvianca
Deal found 3/27$1,003
This Delta deal was found by Cheapflights users on 3/27. 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.
Mon 4/710:50 pmGRU - ONT
1 stop27h 46mDelta
Mon 4/1412:07 pmONT - GRU
1 stop16h 53mDelta
Deal found 3/27$1,012
This American Airlines deal was found by Cheapflights users on 3/27. 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 5/2210:00 pmGRU - ONT
1 stop15h 50mAmerican Airlines
Wed 6/412:45 pmONT - GRU
1 stop14h 30mAmerican Airlines
Deal found 3/27$1,130
This Air Canada deal was found by Cheapflights users on 3/26. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/249:45 pmGRU - ONT
2 stops24h 33mAir Canada
Fri 2/65:45 amONT - GRU
2 stops23h 45mAir Canada
Deal found 3/26$1,827

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 March 28, 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

Fri 5/9

9:50 pm-3:16 pm

2 stops21h 26m

Ontario

Thu 5/15

6:08 am-7:35 am

1 stop21h 27m

$888

Sao PauloOntario

GRU - ONT

GRUONT

Sao Paulo Guarulhos Intl

Tue 9/23

7:20 am-9:55 pm

2 stops18h 35m

Ontario

Thu 9/25

11:25 pm-12:40 am

2 stops21h 15m

$1,003

Sao PauloOntario

GRU - ONT

GRUONT

Sao Paulo Guarulhos Intl

Thu 5/22

10:00 pm-9:50 am

1 stop15h 50m

Ontario

Wed 6/4

12:45 pm-7:15 am

1 stop14h 30m

$1,130

Sao PauloOntario

GRU - ONT

GRUONT

Sao Paulo Guarulhos Intl

Mon 5/19

9:50 pm-12:24 pm

2 stops18h 34m

$485

Sao PauloOntario

GRU - ONT

GRUONT

Sao Paulo Guarulhos Intl

Thu 6/5

7:20 am-9:55 pm

2 stops18h 35m

$507

Sao PauloOntario

GRU - ONT

GRUONT

Sao Paulo Guarulhos Intl

Fri 5/2

8:30 pm-7:28 pm

2 stops26h 58m

$528

Sao PauloOntario

GRU - ONT

GRUONT

Sao Paulo Guarulhos Intl

Thu 4/24

10:00 pm-11:45 am

1 stop17h 45m

$546

Sao PauloOntario

GRU - ONT

GRUONT

Sao Paulo Guarulhos Intl

Tue 6/17

1:45 am-7:12 pm

2 stops21h 27m

$627

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/26

  • Most accurate provider: When it comes to deals on Sao Paulo Guarulhos Intl Airport-Ontario flights, users find the pricing of AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Sao Paulo Guarulhos Intl Airport-Ontario flight deals on Cheapflights vs. AranGrant >95% of the time. Price accuracy is based on data collected from Sao Paulo Guarulhos Intl Airport-Ontario flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Sao Paulo Guarulhos Intl Airport-Ontario flights, Cheapflights users trust AranGrant the most. AranGrant 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 Sao Paulo Guarulhos Intl Airport-Ontario 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 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 $326). 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 March 28, 2025.
To help decide which airline to fly from Sao Paulo to Ontario, see what other customers have to say about Delta, United Airlines and American 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
7,896 reviews

Entertainment

7.9

Overall

8.0

Food

7.3

Comfort

8.0

Boarding

8.2

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
7,896 reviews
Delta
8.0
Very good
7,896 reviews

Entertainment

7.9

Overall

8.0

Food

7.3

Comfort

8.0

Boarding

8.2

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
8,603 reviews
Delta
8.0
Very good
7,896 reviews

Entertainment

7.9

Overall

8.0

Food

7.3

Comfort

8.0

Boarding

8.2

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
7,896 reviews

Entertainment

7.9

Overall

8.0

Food

7.3

Comfort

8.0

Boarding

8.2

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
2,300 reviews
Delta
8.0
Very good
7,896 reviews

Entertainment

7.9

Overall

8.0

Food

7.3

Comfort

8.0

Boarding

8.2

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 United Airlines ($485), Avianca ($507), and Delta ($528).

  • 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 $326). 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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