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Green Bay

$175+ Cheap flights from Ontario to Green Bay (ONT - GRB)

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 7/29. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — GRB
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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Cheap flight deals from Ontario to Green Bay

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Green Bay (GRB). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated June 12, 2025.

Round-trip from

$298
(Booking.com)

One-way from

$175
(Delta)

Popular in

July

Cheapest in

June

Average price

$269
From Ontario to Green Bay Austin-Straubel
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One-way flight from Ontario to Green Bay Austin-Straubel
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High demand for flights, 0% potential price rise
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Cheapest flight prices on average. 5% potential price decrease ($25 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Find flight deals from Ontario to Green Bay

Cheapest flights from Ontario to Green Bay
Explore the most affordable flight options available from Ontario to Green Bay. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.

This Booking.com deal was found by Cheapflights users on 6/12. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/1012:59 amONT - GRB
1 stop15h 56mFrontier
Fri 8/157:52 pmGRB - ONT
1 stop5h 58mFrontier
Deal found 6/12$298
This Delta deal was found by Cheapflights users on 6/10. 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 7/1911:40 amONT - GRB
1 stop9h 42mDelta
Wed 7/235:32 amGRB - ONT
1 stop7h 08mDelta
Deal found 6/10$370
This United Airlines deal was found by Cheapflights users on 6/10. 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 9/36:50 pmONT - GRB
2 stops13h 15mUnited Airlines
Sat 9/205:30 pmGRB - ONT
1 stop7h 00mUnited Airlines
Deal found 6/10$384
This American Airlines deal was found by Cheapflights users on 6/10. 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 8/712:22 pmONT - GRB
2 stops9h 08mAmerican Airlines
Tue 8/129:42 amGRB - ONT
2 stops10h 42mAmerican Airlines
Deal found 6/10$457

Cheapflights Fare Finder

Customize your flight search to find flights from Ontario to Green Bay 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 June 12, 2025.
Use the filters below to find and compare flights from Ontario to Green Bay that are best for you.

Fly from

Ontario

Fly to

Green Bay

Route

Depart

Return

Price

OntarioGreen Bay

ONT - GRB

ONTGRB

Ontario

Sun 8/10

12:59 am-6:55 pm

1 stop15h 56m

Green Bay Austin-Straubel

Fri 8/15

7:52 pm-11:50 pm

1 stop5h 58m

$298

OntarioGreen Bay

ONT - GRB

ONTGRB

Ontario

Sat 7/19

11:40 am-11:22 pm

1 stop9h 42m

Green Bay Austin-Straubel

Wed 7/23

5:32 am-10:40 am

1 stop7h 08m

$370

OntarioGreen Bay

ONT - GRB

ONTGRB

Ontario

Wed 9/3

6:50 pm-10:05 am

2 stops13h 15m

Green Bay Austin-Straubel

Sat 9/20

5:30 pm-10:30 pm

1 stop7h 00m

$384

OntarioGreen Bay

ONT - GRB

ONTGRB

Ontario

Thu 8/7

12:22 pm-11:30 pm

2 stops9h 08m

Green Bay Austin-Straubel

Tue 8/12

9:42 am-6:24 pm

2 stops10h 42m

$457

OntarioGreen Bay

ONT - GRB

ONTGRB

Ontario

Tue 7/29

11:40 am-11:22 pm

1 stop9h 42m

$175

OntarioGreen Bay

ONT - GRB

ONTGRB

Ontario

Thu 6/19

5:21 pm-6:54 pm

1 stop23h 33m

$181

OntarioGreen Bay

ONT - GRB

ONTGRB

Ontario

Fri 7/4

7:00 am-4:48 pm

1 stop7h 48m

$220

OntarioGreen Bay

ONT - GRB

ONTGRB

Ontario

Sun 7/6

9:45 pm-9:21 am

2 stops9h 36m

$349

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/12

Best time to book a flight from Ontario to Green Bay

Have a flexible travel schedule? Discover the best time to fly to Green Bay from Ontario 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 Ontario to Green Bay

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

Currently, January is the cheapest month in which you can book a flight from Ontario to Green Bay (average of $331). Flying from Ontario to Green Bay in July is currently the most expensive (average of $475). 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.

What is the cheapest time of day to fly from ONT to GRB?

Find hourly flight availability from Ontario to Green Bay. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 12, 2025.

When flying from Ontario to Green Bay, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Rainfall in Green Bay by month

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

In terms of precipitation, rainfall in Green Bay ranges from 1.1 - 3.9 inches per month. June is typically the wettest month, when rainfall can reach 3.9 in. January is typically the driest time to visit Green Bay when rainfall is around 1.1 in.

Temperature in Green Bay by month

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

If weather is an important factor for your trip to Green Bay, 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 15.8 F).

Reviews of airlines servicing Green Bay

Get insights into the airlines that provide service to Green Bay. 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 Green Bay. Reviews last updated June 12, 2025.
Read through reviews of airlines operating flights from Ontario to Green Bay, such as Delta, United Airlines and American Airlines. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,946 reviews

Crew

8.5

Overall

8.0

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Michael,Sep 2023

SMF - ATL

Not sufficient leg room and three seats are very tigh.t on 737 in economy main cabin
Delta
8.0
Very good
7,946 reviews
Delta
8.0
Very good
7,946 reviews

Crew

8.5

Overall

8.0

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Michael,Sep 2023

SMF - ATL

Not sufficient leg room and three seats are very tigh.t on 737 in economy main cabin
United Airlines
7.4
Good
8,790 reviews
Delta
8.0
Very good
7,946 reviews

Crew

8.5

Overall

8.0

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Michael,Sep 2023

SMF - ATL

Not sufficient leg room and three seats are very tigh.t on 737 in economy main cabin
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,946 reviews

Crew

8.5

Overall

8.0

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Michael,Sep 2023

SMF - ATL

Not sufficient leg room and three seats are very tigh.t on 737 in economy main cabin
Frontier
6.0
Okay
3,295 reviews
Delta
8.0
Very good
7,946 reviews

Crew

8.5

Overall

8.0

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Michael,Sep 2023

SMF - ATL

Not sufficient leg room and three seats are very tigh.t on 737 in economy main cabin

Related info for your journey

Find useful and relevant information for your journey from Ontario to Green Bay. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What are the cheapest airlines flying from Ontario to Green Bay round-trip?

    Frontier, at $298, was found to be the cheapest airline from Ontario to Green Bay.Alternate airlines to your destination round-trip include Delta and United Airlines. You may be able to fly from Ontario to Green Bay for 37% less than the average price by searching for these airlines.

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

    For one-way options, check prices for Delta. According to our data, you can fly for as low as $175. Users have also found prices from $181 and $220 on Frontier and United Airlines, respectively.

  • Can I find deals for flights from Ontario to Green Bay that include hotel bookings?

    Yes. In addition to deals on Ontario to Green Bay flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Green Bay?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Green Bay.

  • Can I find deals for business class flights from Ontario to Green Bay?

    Yes. Cheapflights offers flight deals from Ontario to Green Bay 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 Ontario to Green Bay?

    Currently, January is the cheapest month in which you can book a flight from Ontario to Green Bay (average of $331). Flying from Ontario to Green Bay in July is currently the most expensive (average of $475). 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

Traveling to a place near Ontario?

Book flights to Ontario if you plan to visit one of these locations
Marinette
Manitowoc

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Alternative routes for Ontario to Green Bay

See prices for flight routes from nearby airports that may be better suited for you.
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Top 2 airlines flying from Ontario to Green Bay

Discover the top 2 airlines that operate flights from Ontario to Green Bay. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$288Average$514FlexibilityNo cancel feeOn-time69%
DeltaCheapest$371Average$503FlexibilityNo cancel feeOn-timeN/A

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