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$467+ 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 8/27. Fares are subject to change and may not be available on all flights or dates of travel.
GRU — ONT
Jul 6 — Jul 131
Sun 7/6
Sun 7/13
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 July 1, 2025.

Round-trip from

$858
(MaxMilhas)

One-way from

$467
(Mytrip)

Popular in

December

Cheapest in

November

Average price

$861
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 ($69 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 July 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 July 1, 2025.

This MaxMilhas deal was found by Cheapflights users on 6/29. 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 MaxMilhas is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/510:50 pmGRU - ONT
1 stop15h 45mDelta
Fri 9/1911:55 amONT - GRU
1 stop17h 05mDelta
Deal found 6/29$858
This Flightnetwork deal was found by Cheapflights users on 6/30. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/217:20 amGRU - ONT
2 stops18h 35mAvianca
Tue 8/2611:25 pmONT - GRU
2 stops21h 15mAvianca
Deal found 6/30$1,026
This United Airlines deal was found by Cheapflights users on 6/30. 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 11/1710:15 pmGRU - ONT
2 stops19h 18mUnited Airlines
Sun 11/306:09 amONT - GRU
1 stop22h 21mUnited Airlines
Deal found 6/30$1,068
This LATAM Airlines deal was found by Cheapflights users on 6/30. 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.
Tue 10/2110:50 pmGRU - ONT
1 stop16h 34mLATAM Airlines
Wed 10/2912:00 pmONT - GRU
1 stop17h 35mLATAM Airlines
Deal found 6/30$1,091

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 July 1, 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 9/5

10:50 pm-10:35 am

1 stop15h 45m

Ontario

Fri 9/19

11:55 am-9:00 am

1 stop17h 05m

$858

Sao PauloOntario

GRU - ONT

GRUONT

Sao Paulo Guarulhos Intl

Thu 8/21

7:20 am-9:55 pm

2 stops18h 35m

Ontario

Tue 8/26

11:25 pm-12:40 am

2 stops21h 15m

$1,026

Sao PauloOntario

GRU - ONT

GRUONT

Sao Paulo Guarulhos Intl

Wed 9/24

9:50 pm-12:13 pm

2 stops18h 23m

Ontario

Wed 10/8

9:36 am-7:35 am

2 stops17h 59m

$1,128

Sao PauloOntario

GRU - ONT

GRUONT

Sao Paulo Guarulhos Intl

Fri 8/22

10:05 am-10:20 pm

1 stop16h 15m

Ontario

Wed 8/27

11:45 am-9:00 am

1 stop17h 15m

$1,187

Sao PauloOntario

GRU - ONT

GRUONT

Sao Paulo Guarulhos Intl

Tue 7/8

6:35 pm-11:13 pm

3 stops32h 38m

Ontario

Mon 7/14

1:09 am-5:35 am

2 stops24h 26m

$1,289

Sao PauloOntario

GRU - ONT

GRUONT

Sao Paulo Guarulhos Intl

Wed 8/27

4:23 am-11:07 pm

3 stops22h 44m

$467

Sao PauloOntario

GRU - ONT

GRUONT

Sao Paulo Guarulhos Intl

Tue 9/23

7:20 am-9:55 pm

2 stops18h 35m

$500

Sao PauloOntario

GRU - ONT

GRUONT

Sao Paulo Guarulhos Intl

Mon 9/29

9:50 pm-12:13 pm

2 stops18h 23m

$576

Sao PauloOntario

GRU - ONT

GRUONT

Sao Paulo Guarulhos Intl

Mon 9/29

10:05 am-10:23 pm

1 stop16h 18m

$581

Sao PauloOntario

GRU - ONT

GRUONT

Sao Paulo Guarulhos Intl

Thu 8/7

4:10 pm-10:30 am

3 stops46h 20m

$710

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/29

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.

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 July 1, 2025.
Read through reviews of airlines operating flights from Sao Paulo Guarulhos Intl Airport to Ontario, such as Delta, LATAM Airlines, and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,973 reviews

Crew

8.5

Boarding

8.2

Food

7.3

Overall

8.0

Entertainment

7.9

Comfort

7.9

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
7,973 reviews
Delta
8.0
Very good
7,973 reviews

Crew

8.5

Boarding

8.2

Food

7.3

Overall

8.0

Entertainment

7.9

Comfort

7.9

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
1,801 reviews
Delta
8.0
Very good
7,973 reviews

Crew

8.5

Boarding

8.2

Food

7.3

Overall

8.0

Entertainment

7.9

Comfort

7.9

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
8,858 reviews
Delta
8.0
Very good
7,973 reviews

Crew

8.5

Boarding

8.2

Food

7.3

Overall

8.0

Entertainment

7.9

Comfort

7.9

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
7,973 reviews

Crew

8.5

Boarding

8.2

Food

7.3

Overall

8.0

Entertainment

7.9

Comfort

7.9

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
2,363 reviews
Delta
8.0
Very good
7,973 reviews

Crew

8.5

Boarding

8.2

Food

7.3

Overall

8.0

Entertainment

7.9

Comfort

7.9

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 ($500), United Airlines ($576), and LATAM Airlines ($581).

  • 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.

See more FAQs

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