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$482+ 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 9/23. Fares are subject to change and may not be available on all flights or dates of travel.
GRB — YYZ
oct. 15 — oct. 221
mié. 10/15
mié. 10/22
1 adult, Economy
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Cheap 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 septiembre 15, 2025.

Round-trip from

$520
(American Airlines)

One-way from

$482
(Delta)
From Green Bay Austin-Straubel to Ontario
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One-way flight from Green Bay Austin-Straubel to Ontario
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Find 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 septiembre 15, 2025.

This American Airlines deal was found by Cheapflights users on 9/13. 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.
mié. 10/299:44 amGRB - YYZ
2 stops12h 18mAmerican Airlines
mié. 11/54:44 pmYYZ - GRB
1 stop17h 31mAmerican Airlines
Deal found 9/13$520
This American Airlines deal was found by Cheapflights users on 9/14. 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.
jue. 11/66:01 amGRB - YUL
1 stop8h 10mAmerican Airlines
jue. 11/277:30 amYUL - GRB
2 stops32h 10mAmerican Airlines
Deal found 9/14$520
This American Airlines deal was found by Cheapflights users on 9/15. 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.
jue. 11/66:01 amGRB - YYZ
1 stop9h 03mAmerican Airlines
dom. 11/94:44 pmYYZ - GRB
1 stop17h 31mAmerican Airlines
Deal found 9/15$575
This American Airlines deal was found by Cheapflights users on 9/14. 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.
mié. 11/511:06 amGRB - YUL
2 stops25h 43mAmerican Airlines
jue. 11/207:30 amYUL - GRB
2 stops12h 52mAmerican Airlines
Deal found 9/14$598
This United deal was found by Cheapflights users on 9/14. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 11/63:51 pmGRB - YUL
1 stop23h 06mMultiple Airlines
jue. 11/274:45 pmYUL - GRB
1 stop20h 48mMultiple Airlines
Deal found 9/14$628
This United deal was found by Cheapflights users on 9/14. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 11/51:20 pmGRB - YUL
1 stop25h 37mMultiple Airlines
jue. 11/201:10 pmYUL - GRB
1 stop22h 01mMultiple Airlines
Deal found 9/14$629
This FlightHub deal was found by Cheapflights users on 9/15. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 11/277:00 amGRB - YUL
1 stop3h 59mWestJet
dom. 11/306:00 amYUL - GRB
1 stop11h 16mWestJet
Deal found 9/15$715
This United Airlines deal was found by Cheapflights users on 9/15. 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.
jue. 11/68:00 amGRB - YYZ
2 stops8h 49mUnited Airlines
dom. 11/95:30 pmYYZ - GRB
1 stop5h 08mUnited Airlines
Deal found 9/15$729
This FlightHub deal was found by Cheapflights users on 9/14. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 9/2811:07 amGRB - YYZ
1 stop21h 15mWestJet
jue. 10/210:12 amYYZ - GRB
1 stop6h 59mWestJet
Deal found 9/14$735
This Delta deal was found by Cheapflights users on 9/14. 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.
jue. 11/2712:20 pmGRB - YUL
1 stop6h 27mDelta
dom. 11/307:10 amYUL - GRB
1 stop9h 27mDelta
Deal found 9/14$786
This American Airlines deal was found by Cheapflights users on 9/14. 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.
dom. 9/289:48 amGRB - YYZ
1 stop3h 43mAmerican Airlines
jue. 10/23:45 pmYYZ - GRB
2 stops8h 43mAmerican Airlines
Deal found 9/14$815

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 septiembre 15, 2025.
Use the filters below to find and compare flights from Green Bay to Ontario that are best for you.

Fly from

Green Bay

Fly to

Ontario

Route

Depart

Return

Price

Green BayToronto

GRB - YYZ

GRBYYZ

Green Bay Austin-Straubel

mié. 10/29

9:44 am-11:02 pm

2 stops12h 18m

Toronto Pearson Intl

mié. 11/5

4:44 pm-9:15 am

1 stop17h 31m

$520

Green BayMontreal

GRB - YUL

GRBYUL

Green Bay Austin-Straubel

jue. 11/6

6:01 am-3:11 pm

1 stop8h 10m

Montreal Pierre Elliott Trudeau Intl

jue. 11/27

7:30 am-2:40 pm

2 stops32h 10m

$520

Green BayToronto

GRB - YYZ

GRBYYZ

Green Bay Austin-Straubel

jue. 11/6

6:01 am-4:04 pm

1 stop9h 03m

Toronto Pearson Intl

dom. 11/9

4:44 pm-9:15 am

1 stop17h 31m

$575

Green BayMontreal

GRB - YUL

GRBYUL

Green Bay Austin-Straubel

mié. 11/5

11:06 am-1:49 pm

2 stops25h 43m

Montreal Pierre Elliott Trudeau Intl

jue. 11/20

7:30 am-7:22 pm

2 stops12h 52m

$598

Green BayMontreal

GRB - YUL

GRBYUL

Green Bay Austin-Straubel

jue. 11/6

3:51 pm-3:57 pm

1 stop23h 06m

Montreal Pierre Elliott Trudeau Intl

jue. 11/27

4:45 pm-12:33 pm

1 stop20h 48m

$628

Green BayMontreal

GRB - YUL

GRBYUL

Green Bay Austin-Straubel

mié. 11/5

1:20 pm-3:57 pm

1 stop25h 37m

Montreal Pierre Elliott Trudeau Intl

jue. 11/20

1:10 pm-10:11 am

1 stop22h 01m

$629

Green BayToronto

GRB - YYZ

GRBYYZ

Green Bay Austin-Straubel

lun. 3/9

5:25 pm-11:02 pm

1 stop4h 37m

Toronto Pearson Intl

vie. 3/13

6:30 am-11:19 am

1 stop5h 49m

$708

Green BayMontreal

GRB - YUL

GRBYUL

Green Bay Austin-Straubel

jue. 11/27

7:00 am-11:59 am

1 stop3h 59m

Montreal Pierre Elliott Trudeau Intl

dom. 11/30

6:00 am-4:16 pm

1 stop11h 16m

$715

Green BayToronto

GRB - YYZ

GRBYYZ

Green Bay Austin-Straubel

jue. 11/6

8:00 am-5:49 pm

2 stops8h 49m

Toronto Pearson Intl

dom. 11/9

5:30 pm-9:38 pm

1 stop5h 08m

$729

Green BayToronto

GRB - YYZ

GRBYYZ

Green Bay Austin-Straubel

dom. 9/28

11:07 am-9:22 am

1 stop21h 15m

Toronto Pearson Intl

jue. 10/2

10:12 am-4:11 pm

1 stop6h 59m

$735

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Showing 1-10 of 14 results
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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 $708, American Airlines can have you in Region of Ontario from Green Bay in 4h 37m. 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 - 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.

  • What is the cheapest month to book a flight from Green Bay to Region of Ontario?

    Currently, January is the cheapest month in which you can book a flight from Green Bay to Region of Ontario (average of $243). Flying from Green Bay to Region of Ontario in August is currently the most expensive (average of $348). 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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See prices for flight routes from nearby airports that may be better suited for you.
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