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Cheap flights from Green Bay to Ontario from C$ 380

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 24/9. Fares are subject to change and may not be available on all flights or dates of travel.
GRB — YYZ
6 Jun — 13 Jun1
1 adult

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 1 June 2025.

Round-trip from

C$ 890
United Airlines
  • United Airlines
  • 21/7-28/7
  • 2 total stops
  • 11h 15m total
  • Green Bay to Ontario
Search Deals

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 1 June 2025.

Mon 21/73:54 p.m.GRB - YYZ
1 stop7h 04mUnited Airlines
Mon 28/77:00 a.m.YYZ - GRB
1 stop4h 11mUnited Airlines
Deal found 31/5C$ 890
Sun 29/65:36 p.m.GRB - YUL
1 stop16h 54mAmerican Airlines
Sun 6/75:29 p.m.YUL - GRB
1 stop16h 52mAmerican Airlines
Deal found 31/5C$ 973
Thu 26/611:13 a.m.GRB - YYZ
1 stop5h 02mWestJet
Mon 30/67:24 p.m.YYZ - GRB
1 stop17h 06mWestJet
Deal found 1/6C$ 977
Thu 26/66:00 a.m.GRB - YYZ
2 stops11h 34mAmerican Airlines
Mon 30/66:30 a.m.YYZ - GRB
1 stop8h 31mAmerican Airlines
Deal found 1/6C$ 1,008

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 629,999 searches. Data last updated 1 June 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 21/7

3:54 p.m.-11:58 p.m.

1 stop7h 04m

Toronto Pearson Intl

Mon 28/7

7:00 a.m.-10:11 a.m.

1 stop4h 11m

C$ 890

Green BayMontreal

GRB - YUL

GRBYUL

Green Bay Austin-Straubel

Sun 29/6

5:36 p.m.-11:30 a.m.

1 stop16h 54m

Montreal Pierre Elliott Trudeau Intl

Sun 6/7

5:29 p.m.-9:21 a.m.

1 stop16h 52m

C$ 973

Green BayToronto

GRB - YYZ

GRBYYZ

Green Bay Austin-Straubel

Thu 26/6

11:13 a.m.-5:15 p.m.

1 stop5h 02m

Toronto Pearson Intl

Mon 30/6

7:24 p.m.-11:30 a.m.

1 stop17h 06m

C$ 977

Green BayToronto

GRB - YYZ

GRBYYZ

Green Bay Austin-Straubel

Thu 26/6

6:00 a.m.-6:34 p.m.

2 stops11h 34m

Toronto Pearson Intl

Mon 30/6

6:30 a.m.-2:01 p.m.

1 stop8h 31m

C$ 1,008

Green BayMontreal

GRB - YUL

GRBYUL

Green Bay Austin-Straubel

Wed 24/9

4:00 p.m.-11:24 p.m.

1 stop6h 24m

C$ 380

Green BayMontreal

GRB - YUL

GRBYUL

Green Bay Austin-Straubel

Wed 24/9

4:36 p.m.-9:50 a.m.

2 stops16h 14m

C$ 387

Flights are sorted by cheapest round-trip flights first.

Deals found on 31/5

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 51.0 - 83.0 mm per month. June is typically the wettest month, when rainfall can reach 83.0 mm. February is typically the driest time to visit Region of Ontario when rainfall is around 51.0 mm.

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 21.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -6.0 C).

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 1 June 2025.
United Airlines
7.4
Good
8,761 reviews
Check prices

Comfort

7.3

Crew

8.1

Entertainment

7.0

Food

6.6

Overall

7.4

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
United Airlines
7.4
Good
8,761 reviews
United Airlines
7.4
Good
8,761 reviews
Check prices

Comfort

7.3

Crew

8.1

Entertainment

7.0

Food

6.6

Overall

7.4

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
American Airlines
7.2
Good
10,000 reviews
United Airlines
7.4
Good
8,761 reviews
Check prices

Comfort

7.3

Crew

8.1

Entertainment

7.0

Food

6.6

Overall

7.4

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
WestJet
7.2
Good
2,861 reviews
United Airlines
7.4
Good
8,761 reviews
Check prices

Comfort

7.3

Crew

8.1

Entertainment

7.0

Food

6.6

Overall

7.4

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

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?

    Most people fly from Green Bay Austin-Straubel (GRB) if they book a flight from Green Bay to Ontario. Green Bay Austin-Straubel is conveniently located just 9.5 km from Green Bay’s city centre.

  • 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 C$ 167). Flying from Green Bay to Region of Ontario in July is currently the most expensive (average of C$ 257). 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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How does Cheapflights help users find flights from Green Bay to Ontario?

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Certainly. Search results for flights to Ontario from Green Bay shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

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Yes, Cheapflights offers price alerts on Green Bay to Ontario flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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