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$325+ 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 7/15. Fares are subject to change and may not be available on all flights or dates of travel.
GRB — YYZ
Jun 23 — Jun 301
Tue 6/23
Tue 6/30
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 May 24, 2026.

This American Airlines deal was found by Cheapflights users on 5/21. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/126:51 pm
GRB
-
YYZ
1 stop18h 42m
American Airlines
Mon 6/156:24 pm
YYZ
-
GRB
1 stop19h 05m
American Airlines
Deal found 5/21$562
This United Airlines deal was found by Cheapflights users on 5/21. 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.
Fri 6/126:52 pm
GRB
-
YOW
2 stops14h 11m
United Airlines
Sun 6/146:25 am
YOW
-
GRB
1 stop4h 36m
United Airlines
Deal found 5/21$614
This American Airlines deal was found by Cheapflights users on 5/22. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/1512:59 pm
GRB
-
YYZ
1 stop9h 30m
American Airlines
Thu 6/187:25 am
YYZ
-
GRB
1 stop11h 56m
American Airlines
Deal found 5/22$644
This American Airlines deal was found by Cheapflights users on 5/22. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/122:51 pm
GRB
-
YUL
2 stops17h 54m
American Airlines
Sat 9/1910:35 am
YUL
-
GRB
2 stops13h 32m
American Airlines
Deal found 5/22$658
This United Airlines deal was found by Cheapflights users on 5/21. 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.
Mon 9/2111:45 am
GRB
-
YOW
2 stops11h 09m
United Airlines
Sat 9/265:20 pm
YOW
-
GRB
1 stop6h 59m
United Airlines
Deal found 5/21$689
This American Airlines deal was found by Cheapflights users on 5/22. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/316:00 am
GRB
-
YUL
1 stop9h 53m
American Airlines
Wed 6/1012:30 pm
YUL
-
GRB
1 stop12h 40m
American Airlines
Deal found 5/22$694
This American Airlines deal was found by Cheapflights users on 5/22. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/146:08 am
GRB
-
YUL
2 stops15h 48m
American Airlines
Sun 7/195:30 pm
YUL
-
GRB
1 stop20h 01m
American Airlines
Deal found 5/22$711
This United Airlines deal was found by Cheapflights users on 5/22. 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.
Sat 11/72:30 pm
GRB
-
YYZ
1 stop8h 49m
United Airlines
Tue 11/108:00 am
YYZ
-
GRB
1 stop9h 43m
United Airlines
Deal found 5/22$717
This American Airlines deal was found by Cheapflights users on 5/22. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1112:27 pm
GRB
-
YYZ
1 stop10h 02m
American Airlines
Sun 8/166:29 pm
YYZ
-
GRB
1 stop18h 28m
American Airlines
Deal found 5/22$728
This United Airlines deal was found by Cheapflights users on 5/19. 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.
Wed 6/36:30 am
GRB
-
YUL
1 stop10h 00m
United Airlines
Sat 6/66:10 am
YUL
-
GRB
1 stop6h 49m
United Airlines
Deal found 5/19$736
This Delta deal was found by Cheapflights users on 5/22. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/211:11 am
GRB
-
YUL
1 stop4h 04m
Delta
Tue 6/99:30 am
YUL
-
GRB
2 stops12h 02m
Delta
Deal found 5/22$744
This Delta deal was found by Cheapflights users on 5/22. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/297:00 am
GRB
-
YUL
1 stop3h 59m
Delta
Tue 6/99:30 am
YUL
-
GRB
2 stops12h 02m
Delta
Deal found 5/22$756

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 May 24, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$562
(American Airlines)

One-way from

$325
(American 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 May 24, 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

Fri 6/12

6:51 pm-2:33 pm

1 stop18h 42m

Toronto Pearson Intl

Mon 6/15

6:24 pm-12:29 pm

1 stop19h 05m

$562

Green BayOttawa

GRB - YOW

GRBYOW

Green Bay Austin-Straubel

Fri 6/12

6:52 pm-10:03 am

2 stops14h 11m

Ottawa

Sun 6/14

6:25 am-10:01 am

1 stop4h 36m

$614

Green BayToronto

GRB - YYZ

GRBYYZ

Green Bay Austin-Straubel

Mon 6/15

12:59 pm-11:29 pm

1 stop9h 30m

Toronto Pearson Intl

Thu 6/18

7:25 am-6:21 pm

1 stop11h 56m

$644

Green BayOttawa

GRB - YOW

GRBYOW

Green Bay Austin-Straubel

Mon 9/21

11:45 am-11:54 pm

2 stops11h 09m

Ottawa

Sat 9/26

6:00 am-4:43 pm

2 stops11h 43m

$657

Green BayToronto

GRB - YYZ

GRBYYZ

Green Bay Austin-Straubel

Sat 11/7

1:11 pm-12:19 am

1 stop10h 08m

Toronto Pearson Intl

Tue 11/10

5:30 pm-12:19 am

1 stop7h 49m

$717

Green BayToronto

GRB - YYZ

GRBYYZ

Green Bay Austin-Straubel

Tue 8/11

12:27 pm-11:29 pm

1 stop10h 02m

Toronto Pearson Intl

Sun 8/16

6:29 pm-11:57 am

1 stop18h 28m

$728

Green BayMontreal

GRB - YUL

GRBYUL

Green Bay Austin-Straubel

Wed 6/3

6:30 am-5:30 pm

1 stop10h 00m

Montreal Pierre Elliott Trudeau Intl

Sat 6/6

6:10 am-11:59 am

1 stop6h 49m

$736

Green BayMontreal

GRB - YUL

GRBYUL

Green Bay Austin-Straubel

Wed 6/3

4:19 pm-11:41 pm

1 stop6h 22m

Montreal Pierre Elliott Trudeau Intl

Tue 6/9

9:30 am-8:32 pm

2 stops12h 02m

$744
Quickest round-trip

Green BayMontreal

GRB - YUL

GRBYUL

Green Bay Austin-Straubel

Tue 7/14

6:08 am-11:43 am

1 stop4h 35m

Montreal Pierre Elliott Trudeau Intl

Sun 7/19

5:30 pm-12:12 am

1 stop7h 42m

$757

Green BayMontreal

GRB - YUL

GRBYUL

Green Bay Austin-Straubel

Fri 7/10

6:08 am-11:43 am

1 stop4h 35m

Montreal Pierre Elliott Trudeau Intl

Fri 7/10

5:30 pm-12:12 am

1 stop7h 42m

$757

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/22

Showing 1-10 of 21 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 $744, American Airlines can have you in Region of Ontario from Green Bay in 6h 22m. Green Bay and Region of Ontario are separated by a distance of 705 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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