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$496+ Cheap flights from Green Bay (GRB) to Ontario

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/28. Fares are subject to change and may not be available on all flights or dates of travel.
GRB — YYZ
May 7 — May 141
Thu 5/7
Thu 5/14
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 April 7, 2026.

This United Airlines deal was found by Cheapflights users on 4/2. 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.
Tue 4/286:30 am
GRB
-
YOW
1 stop9h 37m
United Airlines
Wed 4/296:25 am
YOW
-
GRB
1 stop4h 35m
United Airlines
Deal found 4/2$496
This United Airlines deal was found by Cheapflights users on 4/6. 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.
Tue 6/25:00 am
GRB
-
YOW
1 stop7h 59m
United Airlines
Wed 6/310:44 am
YOW
-
GRB
1 stop7h 07m
United Airlines
Deal found 4/6$518
This American Airlines deal was found by Cheapflights users on 4/2. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/299:42 am
GRB
-
YYZ
1 stop12h 47m
American Airlines
Sun 5/36:15 am
YYZ
-
GRB
1 stop18h 16m
American Airlines
Deal found 4/2$546
This American Airlines deal was found by Cheapflights users on 4/6. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/67:30 am
GRB
-
YYZ
1 stop14h 59m
American Airlines
Wed 5/136:15 am
YYZ
-
GRB
1 stop11h 39m
American Airlines
Deal found 4/6$567
This American Airlines deal was found by Cheapflights users on 4/2. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/135:24 pm
GRB
-
YYZ
1 stop20h 09m
American Airlines
Fri 4/176:27 pm
YYZ
-
GRB
1 stop15h 45m
American Airlines
Deal found 4/2$607
This United Airlines deal was found by Cheapflights users on 4/5. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/266:30 am
GRB
-
YYZ
1 stop8h 16m
United Airlines
Sat 5/3011:00 am
YYZ
-
GRB
1 stop9h 10m
United Airlines
Deal found 4/5$611
This United Airlines deal was found by Cheapflights users on 4/4. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/208:00 am
GRB
-
YYZ
1 stop8h 56m
United Airlines
Wed 5/276:25 am
YYZ
-
GRB
2 stops13h 45m
United Airlines
Deal found 4/4$621
This American Airlines deal was found by Cheapflights users on 4/4. 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.
Thu 6/412:15 pm
GRB
-
YUL
1 stop22h 29m
American Airlines
Tue 6/97:29 am
YUL
-
GRB
2 stops17h 24m
American Airlines
Deal found 4/4$623
This American Airlines deal was found by Cheapflights users on 4/6. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/216:00 am
GRB
-
YYZ
1 stop7h 30m
American Airlines
Thu 5/286:26 pm
YYZ
-
GRB
1 stop15h 47m
American Airlines
Deal found 4/6$632
This American Airlines deal was found by Cheapflights users on 4/4. 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.
Fri 7/176:55 pm
GRB
-
YUL
1 stop15h 49m
American Airlines
Thu 7/2312:30 pm
YUL
-
GRB
1 stop21h 49m
American Airlines
Deal found 4/4$633
This American Airlines deal was found by Cheapflights users on 4/3. 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.
Thu 6/256:00 am
GRB
-
YUL
1 stop9h 53m
American Airlines
Sat 7/47:17 am
YUL
-
GRB
2 stops12h 08m
American Airlines
Deal found 4/3$663
This United Airlines deal was found by Cheapflights users on 4/2. 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.
Mon 4/278:25 pm
GRB
-
YUL
1 stop13h 15m
United Airlines
Tue 4/282:20 pm
YUL
-
GRB
2 stops8h 17m
United Airlines
Deal found 4/2$683

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 April 7, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$496
(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

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 April 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 BayOttawa

GRB - YOW

GRBYOW

Green Bay Austin-Straubel

Tue 6/2

2:35 pm-9:35 pm

1 stop6h 00m

Ottawa

Wed 6/3

6:25 am-10:01 am

1 stop4h 36m

$496

Green BayOttawa

GRB - YOW

GRBYOW

Green Bay Austin-Straubel

Tue 4/28

6:30 am-5:07 pm

1 stop9h 37m

Ottawa

Wed 4/29

6:25 am-10:00 am

1 stop4h 35m

$496

Green BayToronto

GRB - YYZ

GRBYYZ

Green Bay Austin-Straubel

Wed 5/20

9:42 am-11:29 pm

1 stop12h 47m

Toronto Pearson Intl

Wed 5/27

6:26 pm-11:45 am

1 stop18h 19m

$546

Green BayToronto

GRB - YYZ

GRBYYZ

Green Bay Austin-Straubel

Wed 4/29

9:42 am-11:29 pm

1 stop12h 47m

Toronto Pearson Intl

Sun 5/3

6:15 am-11:31 pm

1 stop18h 16m

$546

Green BayToronto

GRB - YYZ

GRBYYZ

Green Bay Austin-Straubel

Wed 5/6

7:30 am-11:29 pm

1 stop14h 59m

Toronto Pearson Intl

Wed 5/13

6:15 am-4:54 pm

1 stop11h 39m

$567

Green BayToronto

GRB - YYZ

GRBYYZ

Green Bay Austin-Straubel

Tue 5/26

2:35 pm-11:18 pm

1 stop7h 43m

Toronto Pearson Intl

Sat 5/30

1:55 pm-9:30 pm

1 stop8h 35m

$611

Green BayToronto

GRB - YYZ

GRBYYZ

Green Bay Austin-Straubel

Wed 5/20

8:00 am-5:56 pm

1 stop8h 56m

Toronto Pearson Intl

Wed 5/27

6:25 am-7:10 pm

2 stops13h 45m

$621

Green BayMontreal

GRB - YUL

GRBYUL

Green Bay Austin-Straubel

Thu 6/4

12:15 pm-11:44 am

1 stop22h 29m

Montreal Pierre Elliott Trudeau Intl

Tue 6/9

7:29 am-11:53 pm

2 stops17h 24m

$623

Green BayMontreal

GRB - YUL

GRBYUL

Green Bay Austin-Straubel

Thu 6/25

6:00 am-4:53 pm

1 stop9h 53m

Montreal Pierre Elliott Trudeau Intl

Sat 7/4

7:17 am-6:25 pm

2 stops12h 08m

$663

Green BayMontreal

GRB - YUL

GRBYUL

Green Bay Austin-Straubel

Mon 4/27

8:25 pm-10:40 am

1 stop13h 15m

Montreal Pierre Elliott Trudeau Intl

Tue 4/28

2:20 pm-9:37 pm

2 stops8h 17m

$683

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/4

Showing 1-10 of 13 resultsSorted by cheapest first
1
2

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 $496, United Airlines can have you in Region of Ontario from Green Bay in 6h. Green Bay and Region of Ontario are separated by a distance of 611 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 - Montreal Pierre Elliott Trudeau Intl, Green Bay Austin-Straubel - Toronto Pearson 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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