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$261+ 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 5/8. Fares are subject to change and may not be available on all flights or dates of travel.
GRB — YYZ
May 4 — May 111
Sun 5/4
Sun 5/11
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 April 29, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$525
(United Airlines)

One-way from

$261
(United Airlines)
Provider with most accurate pricing for Green Bay Austin-Straubel-Toronto (YTO) flight deals.
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Provider most trusted by Cheapflights users for Green Bay Austin-Straubel-Toronto (YTO) flights.
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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 April 29, 2025.

This United Airlines deal was found by Cheapflights users on 4/28. 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 5/126:44 amGRB - YYZ
1 stop5h 58mUnited Airlines
Thu 5/157:55 amYYZ - GRB
1 stop13h 57mUnited Airlines
Deal found 4/28$525
This American Airlines deal was found by Cheapflights users on 4/28. 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 5/246:00 amGRB - YYZ
1 stop3h 51mAmerican Airlines
Wed 5/287:25 amYYZ - GRB
2 stops11h 25mAmerican Airlines
Deal found 4/28$530
This Delta deal was found by Cheapflights users on 4/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/2412:06 pmGRB - YUL
2 stops10h 10mDelta
Wed 5/2811:00 amYUL - GRB
2 stops11h 24mDelta
Deal found 4/29$566
This United Airlines deal was found by Cheapflights users on 4/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/241:10 pmGRB - YUL
1 stop7h 19mUnited Airlines
Wed 5/286:15 amYUL - GRB
1 stop4h 56mUnited Airlines
Deal found 4/29$576
This Delta deal was found by Cheapflights users on 4/28. 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.
Wed 4/305:49 pmGRB - YYZ
1 stop4h 06mDelta
Sun 5/49:45 amYYZ - GRB
1 stop7h 38mDelta
Deal found 4/28$781
This WestJet deal was found by Cheapflights users on 4/29. 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 WestJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/25:04 pmGRB - YUL
1 stop5h 24mWestJet
Mon 5/54:50 pmYUL - GRB
1 stop4h 41mWestJet
Deal found 4/29$991

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 29, 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

Mon 5/12

6:44 am-1:42 pm

1 stop5h 58m

Toronto Pearson Intl

Thu 5/15

7:55 am-8:52 pm

1 stop13h 57m

$525

Green BayToronto

GRB - YYZ

GRBYYZ

Green Bay Austin-Straubel

Sat 5/24

6:00 am-10:51 am

1 stop3h 51m

Toronto Pearson Intl

Wed 5/28

7:25 am-5:50 pm

2 stops11h 25m

$530

Green BayMontreal

GRB - YUL

GRBYUL

Green Bay Austin-Straubel

Sat 5/24

12:06 pm-11:16 pm

2 stops10h 10m

Montreal Pierre Elliott Trudeau Intl

Wed 5/28

11:00 am-9:24 pm

2 stops11h 24m

$566

Green BayMontreal

GRB - YUL

GRBYUL

Green Bay Austin-Straubel

Sat 5/24

1:10 pm-9:29 pm

1 stop7h 19m

Montreal Pierre Elliott Trudeau Intl

Wed 5/28

6:15 am-10:11 am

1 stop4h 56m

$576

Green BayToronto

GRB - YYZ

GRBYYZ

Green Bay Austin-Straubel

Thu 5/8

8:33 am-1:42 pm

1 stop4h 09m

$261

Green BayToronto

GRB - YYZ

GRBYYZ

Green Bay Austin-Straubel

Thu 5/8

6:00 am-3:40 pm

2 stops8h 40m

$265

Green BayMontreal

GRB - YUL

GRBYUL

Green Bay Austin-Straubel

Wed 9/24

5:30 am-5:04 pm

1 stop10h 34m

$277

Green BayMontreal

GRB - YUL

GRBYUL

Green Bay Austin-Straubel

Wed 9/24

6:19 am-10:45 pm

2 stops15h 26m

$282

Green BayToronto

GRB - YYZ

GRBYYZ

Green Bay Austin-Straubel

Tue 5/6

11:07 am-5:18 pm

1 stop5h 11m

$325

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/28

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

Rainfall in Ontario by month

Plan your trip to Ontario by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Region of Ontario ranges from 2.0 - 3.3 inches per month. June is typically the wettest month, when rainfall can reach 3.3 in. February is typically the driest time to visit Region of Ontario when rainfall is around 2.0 in.

Temperature in Ontario by month

Plan your trip to Ontario by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Region of Ontario, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 69.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 21.2 F).

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 April 29, 2025.
Delta
8.0
Very good
7,936 reviews

Entertainment

7.9

Comfort

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,936 reviews
Delta
8.0
Very good
7,936 reviews

Entertainment

7.9

Comfort

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
United Airlines
7.4
Good
8,696 reviews
Delta
8.0
Very good
7,936 reviews

Entertainment

7.9

Comfort

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,936 reviews

Entertainment

7.9

Comfort

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
WestJet
7.2
Good
2,823 reviews
Delta
8.0
Very good
7,936 reviews

Entertainment

7.9

Comfort

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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.

  • What are the cheapest airlines to fly from Green Bay to Region of Ontario one-way?

    To fly one-way, consider booking your trip with United Airlines, which is currently one of the cheapest options available, starting at $261. American Airlines flights start at $265 while deals on Delta start at $277 one-way.

  • 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 July is currently the most expensive (average of $359). 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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Alternative routes for Green Bay to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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