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$282+ Cheap flights from Green Bay (GRB) to Ontario

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 9/1. Fares are subject to change and may not be available on all flights or dates of travel.
GRB — YYZ
Aug 6 — Aug 131
Thu 8/6
Thu 8/13
1 adult, Economy
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Cheap flight deals from Green Bay to Ontario

Cheapest flights from Green Bay to Ontario
Explore the most affordable flight options available from Green Bay to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 7, 2026.

This American Airlines deal was found by Cheapflights users on 7/5. 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.
Mon 8/247:02 pm
GRB
-
YYZ
1 stop16h 31m
American Airlines
Tue 9/17:20 am
YYZ
-
GRB
1 stop8h 21m
American Airlines
Deal found 7/5$519
This American Airlines deal was found by Cheapflights users on 7/3. 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.
Wed 8/265:55 am
GRB
-
YYZ
1 stop16h 34m
American Airlines
Mon 8/311:15 pm
YYZ
-
GRB
1 stop12h 01m
American Airlines
Deal found 7/3$589
This American Airlines deal was found by Cheapflights users on 7/5. 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 8/273:20 pm
GRB
-
YYZ
1 stop18h 39m
American Airlines
Tue 9/17:20 am
YYZ
-
GRB
1 stop8h 21m
American Airlines
Deal found 7/5$610
This United Airlines deal was found by Cheapflights users on 7/2. 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 8/296:25 am
GRB
-
YYZ
1 stop13h 19m
United Airlines
Wed 9/27:00 am
YYZ
-
GRB
1 stop5h 55m
United Airlines
Deal found 7/2$629
This Billigflug deal was found by Cheapflights users on 7/5. 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 Billigflug is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/2412:03 pm
GRB
-
YYZ
1 stop5h 31m
Multiple Airlines
Tue 9/110:00 am
YYZ
-
GRB
2 stops11h 40m
Multiple Airlines
Deal found 7/5$634
This American Airlines deal was found by Cheapflights users on 7/3. 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.
Fri 7/243:24 pm
GRB
-
YYZ
1 stop18h 35m
American Airlines
Sun 7/267:20 am
YYZ
-
GRB
1 stop17h 52m
American Airlines
Deal found 7/3$645
This American Airlines deal was found by Cheapflights users on 7/5. 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.
Fri 7/316:08 am
GRB
-
YYZ
1 stop10h 27m
American Airlines
Tue 8/47:17 am
YYZ
-
GRB
1 stop17h 55m
American Airlines
Deal found 7/5$648
This United Airlines deal was found by Cheapflights users on 7/6. 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 7/2210:37 am
GRB
-
YYZ
1 stop4h 09m
United Airlines
Fri 7/242:45 pm
YYZ
-
GRB
1 stop5h 25m
United Airlines
Deal found 7/6$650
This American Airlines deal was found by Cheapflights users on 7/4. 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.
Wed 7/226:08 am
GRB
-
YUL
1 stop9h 39m
American Airlines
Fri 7/244:16 pm
YUL
-
GRB
2 stops19h 30m
American Airlines
Deal found 7/4$656
This United Airlines deal was found by Cheapflights users on 7/2. 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 9/266:20 am
GRB
-
YOW
1 stop6h 39m
United Airlines
Tue 9/296:25 am
YOW
-
GRB
1 stop7h 05m
United Airlines
Deal found 7/2$657
This Rumbo deal was found by Cheapflights users on 7/5. 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 Rumbo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/256:15 am
GRB
-
YYZ
1 stop4h 19m
WestJet
Sat 8/16:10 am
YYZ
-
GRB
1 stop15h 20m
WestJet
Deal found 7/5$659
This oojo deal was found by Cheapflights users on 7/2. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/256:50 am
GRB
-
YUL
1 stop8h 30m
WestJet
Sun 7/266:45 am
YUL
-
GRB
2 stops14h 45m
WestJet
Deal found 7/2$686

Find flight deals from Green Bay to Ontario

Keep the following information in mind while searching for Green Bay to Ontario flight deals. Data was last updated July 7, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$519
(American Airlines)

One-way from

$282
(United Airlines)
Provider with most accurate pricing for Green Bay Austin-Straubel-Toronto (YTO) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Green Bay Austin-Straubel-Toronto (YTO) flights.
Search Deals
From Green Bay Austin-Straubel to Ontario
Search Deals
One-way flight from Green Bay Austin-Straubel to Ontario
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Green Bay 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 7, 2026.
Use the filters below to find and compare flights from Green Bay to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Green BayToronto

GRB - YYZ

GRBYYZ

Green Bay Austin-Straubel

Sat 8/29

12:30 pm-8:44 pm

1 stop7h 14m

Toronto Pearson Intl

Wed 9/2

7:00 am-11:55 am

1 stop5h 55m

$629

Green BayToronto

GRB - YYZ

GRBYYZ

Green Bay Austin-Straubel

Mon 8/24

12:03 pm-6:34 pm

1 stop5h 31m

Toronto Pearson Intl

Tue 9/1

10:00 am-8:40 pm

2 stops11h 40m

$634

Green BayToronto

GRB - YYZ

GRBYYZ

Green Bay Austin-Straubel

Wed 7/22

6:08 am-11:29 pm

1 stop16h 21m

Toronto Pearson Intl

Fri 7/24

6:15 pm-10:46 am

1 stop17h 31m

$650
Quickest round-trip

Green BayToronto

GRB - YYZ

GRBYYZ

Green Bay Austin-Straubel

Wed 7/22

10:37 am-3:46 pm

1 stop4h 09m

Toronto Pearson Intl

Fri 7/24

2:45 pm-7:10 pm

1 stop5h 25m

$650

Green BayMontreal

GRB - YUL

GRBYUL

Green Bay Austin-Straubel

Wed 7/22

6:08 am-4:47 pm

1 stop9h 39m

Montreal Pierre Elliott Trudeau Intl

Fri 7/24

4:16 pm-10:46 am

2 stops19h 30m

$656

Green BayOttawa

GRB - YOW

GRBYOW

Green Bay Austin-Straubel

Sat 9/26

6:20 am-1:59 pm

1 stop6h 39m

Ottawa

Tue 9/29

6:25 am-12:30 pm

1 stop7h 05m

$657

Green BayMontreal

GRB - YUL

GRBYUL

Green Bay Austin-Straubel

Sat 7/25

6:50 am-4:45 pm

2 stops8h 55m

Montreal Pierre Elliott Trudeau Intl

Sun 7/26

6:45 am-8:30 pm

2 stops14h 45m

$687

Green BayMontreal

GRB - YUL

GRBYUL

Green Bay Austin-Straubel

Mon 8/3

11:07 am-11:30 pm

1 stop11h 23m

Montreal Pierre Elliott Trudeau Intl

Mon 8/10

5:45 pm-10:27 am

2 stops17h 42m

$690

Green BayMontreal

GRB - YUL

GRBYUL

Green Bay Austin-Straubel

Wed 7/22

6:50 am-4:20 pm

1 stop8h 30m

Montreal Pierre Elliott Trudeau Intl

Fri 7/24

12:47 pm-8:30 pm

1 stop8h 43m

$693

Green BayMontreal

GRB - YUL

GRBYUL

Green Bay Austin-Straubel

Sat 7/25

9:00 am-5:30 pm

1 stop7h 30m

Montreal Pierre Elliott Trudeau Intl

Sun 7/26

9:45 am-7:10 pm

1 stop10h 25m

$750

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/6

Showing 1-10 of 17 resultsSorted by cheapest first
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Best time to book a flight from Green Bay to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Green Bay 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 Green Bay to Ontario
No data available for this route at this time. Please check back soon.

Related info for your journey

Find useful and relevant information for your journey from Green Bay 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 from for flights from Green Bay to Ontario?

    Located just 5.9 mi from the city center, Green Bay Austin-Straubel (GRB) is the airport most travelers will use when flying to Ontario from Green Bay.

  • How long is the flight from Green Bay to Region of Ontario?

    For as low as $629, American Airlines can have you in Region of Ontario from Green Bay in 7h 14m. Green Bay and Region of Ontario are separated by a distance of 426 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the most popular routes from Green Bay to Region of Ontario?

    When deciding which route to take from Green Bay to Region of Ontario consider Green Bay Austin-Straubel - Toronto Pearson Intl, Green Bay Austin-Straubel - Montreal Pierre Elliott Trudeau Intl or Green Bay Austin-Straubel - Ottawa as they are the most popular.

  • Can I find deals for flights from Green Bay to Ontario that include hotel bookings?

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

  • How can I find direct flights from Green Bay to Ontario?

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

  • Can I find deals for business class flights from Green Bay to Ontario?

    Yes. Cheapflights offers flight deals from Green Bay 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.

See more FAQs

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