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

Delta, at $289, was found to be the cheapest airline from Ontario to Green Bay.Alternate airlines to your destination round-trip include United Airlines and American Airlines. You may be able to fly from Ontario to Green Bay for 46% less than the average price by searching for these airlines.

What is the cheapest day to fly from Ontario to Green Bay?

Travelers seeking maximum savings on their Ontario to Green Bay flight should consider departing on Saturday mornings when fares are most often at their lowest. Friday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

What is the cheapest day to fly round-trip from Ontario to Green Bay?

Departing on a Monday is a good option for securing a great price. You can expect to save up to 33% when planning your travel around this day of the week.

How far in advance should I book a flight from Ontario to Green Bay?

To save on the cost of your flight from Ontario to Green Bay, book at least 27 days before your planned departure. Booking around this time can save you about 116% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $413 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $607.

What is the cheapest month to fly from Ontario to Green Bay?

February is one of the best times of the year to fly to Green Bay from Ontario. Prices for February average $532 per person but you can even find prices for as low as $288. The most expensive prices can be found in the month of November. Opting for a February flight can save you 57% on your journey compared to booking in November

Most accurate provider : When it comes to deals on Ontario-Green Bay flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Green Bay flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-Green Bay flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on Ontario-Green Bay flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Green Bay flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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.

$264+ Flights from Ontario to Green Bay

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Cheap flight deals from Ontario to Green Bay

Most accurate provider	FlightHub 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$289 (Delta)
One-way from	$264 (United Airlines)
Popular in	December
Cheapest in	June
Average price	$523

Provider with most accurate pricing for Ontario-Green Bay Austin-Straubel flight deals.

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Provider most trusted by Cheapflights users for Ontario-Green Bay Austin-Straubel flights.

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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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Highest demand for flights based on searches. 0% potential increase in price ($0 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 7% potential price decrease ($37 potential savings vs. average RT price).

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Average for round-trip flights in April 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 April 15, 2025.

Tue 5/2012:18 pmONT - GRB

1 stop7h 07mDelta

Sat 5/315:35 amGRB - ONT

1 stop7h 33mDelta

Deal found 4/15

$289

Wed 5/214:15 pmONT - GRB

2 stops18h 07mUnited Airlines

Fri 5/303:54 pmGRB - ONT

1 stop8h 32mUnited Airlines

Deal found 4/15

$467

Tue 5/201:14 pmONT - GRB

2 stops7h 56mAmerican Airlines

Sat 5/3111:27 amGRB - ONT

2 stops8h 56mAmerican Airlines

Deal found 4/15

$490

Best flights from Ontario to Green Bay
Discover carefully curated flight deals from Ontario to Green Bay that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 15, 2025.

Tue 5/2012:18 pmONT - GRB

1 stop7h 07mDelta

Sat 5/315:35 amGRB - ONT

1 stop7h 33mDelta

Deal found 4/15

$289

Wed 5/214:15 pmONT - GRB

2 stops18h 07mUnited Airlines

Thu 5/293:54 pmGRB - ONT

1 stop8h 32mUnited Airlines

Deal found 4/15

$467

Tue 5/201:14 pmONT - GRB

2 stops7h 56mAmerican Airlines

Sat 5/3111:27 amGRB - ONT

2 stops8h 56mAmerican Airlines

Deal found 4/15

$490

Last-minute flights from Ontario to Green Bay
Discover last-minute flight deals from Ontario to Green Bay. Data last updated April 15, 2025 and is based on user searches.

Thu 4/243:55 pmONT - GRB

2 stops16h 20mUnited Airlines

Thu 5/16:45 amGRB - ONT

2 stops10h 24mUnited Airlines

Deal found 4/14

$572

Tue 5/2012:18 pmONT - GRB

1 stop7h 07mDelta

Sat 5/315:35 amGRB - ONT

1 stop7h 33mDelta

Deal found 4/15

$289

Tue 5/201:14 pmONT - GRB

2 stops7h 56mAmerican Airlines

Sat 5/3111:27 amGRB - ONT

2 stops8h 56mAmerican Airlines

Deal found 4/15

$490

Wed 5/214:15 pmONT - GRB

2 stops18h 07mUnited Airlines

Wed 5/283:48 pmGRB - ONT

1 stop8h 38mUnited Airlines

Deal found 4/15

$467

One-way flights from Ontario to Green Bay
Search for one-way flight options from Ontario to Green Bay. Find affordable one-way fares based on user searches. Data last updated April 15, 2025.

Tue 7/16:39 pmONT - GRB

2 stops13h 32mUnited Airlines

Deal found 4/14

$264

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

OntarioGreen Bay

ONT - GRB

ONTGRB

Ontario

Tue 5/20

12:18 pm-9:25 pm

1 stop7h 07m

Green Bay Austin-Straubel

Sat 5/31

5:35 am-11:08 am

1 stop7h 33m

$289

OntarioGreen Bay

ONT - GRB

ONTGRB

Ontario

Wed 5/21

4:15 pm-12:22 pm

2 stops18h 07m

Green Bay Austin-Straubel

Fri 5/30

3:54 pm-10:26 pm

1 stop8h 32m

$467

OntarioGreen Bay

ONT - GRB

ONTGRB

Ontario

Tue 5/20

1:14 pm-11:10 pm

2 stops7h 56m

Green Bay Austin-Straubel

Sat 5/31

11:27 am-6:23 pm

2 stops8h 56m

$490

OntarioGreen Bay

ONT - GRB

ONTGRB

Ontario

Tue 7/1

6:39 pm-10:11 am

2 stops13h 32m

$264

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/14

Compare providers for flights from Ontario to Green Bay

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Green Bay in April.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy1 star	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*2 stars
eDreams	Price Accuracy3 stars	Trust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

Most accurate provider: When it comes to deals on Ontario-Green Bay flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Green Bay flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-Green Bay flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on Ontario-Green Bay flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Green Bay flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 June is currently the most expensive (average of $495). 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?

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

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

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

Delta

8.0

Very good

7,918 reviews

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

7,918 reviews

Delta

8.0

Very good

7,918 reviews

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

8,658 reviews

Delta

8.0

Very good

7,918 reviews

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

7,918 reviews

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

What are the cheapest airlines flying from Ontario to Green Bay round-trip?
Delta, at $289, was found to be the cheapest airline from Ontario to Green Bay.Alternate airlines to your destination round-trip include United Airlines and American Airlines. You may be able to fly from Ontario to Green Bay for 46% less than the average price by searching for these airlines.
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 June is currently the most expensive (average of $495). 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

Marinette

Manitowoc

Browse thousands of different options on Cheapflights for your next trip

Top 2 airlines flying from Ontario to Green Bay

Airline	Cheapest	Average	Flexibility	On-time
American Airlines	Cheapest$353	Average$598	FlexibilityNo cancel fee	On-time71%
Delta	Cheapest$371	Average$503	FlexibilityNo cancel fee	On-timeN/A

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$264+ 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 7/1. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Ontario to Green Bay with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Ontario to Green Bay

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Ontario to Green Bay

Cheapest flights from Ontario to Green BayExplore 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 April 15, 2025.

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 April 15, 2025.

Cheapflights Fare Finder

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

Compare providers for flights from Ontario to Green Bay

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Green Bay in April.

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.

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?

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 April 15, 2025.

Rainfall in Green Bay by month

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

Temperature in Green Bay by month

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

Reviews of airlines servicing Green Bay

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?

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

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

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

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

Traveling to a place near Ontario?

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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.

Top 2 airlines flying from Ontario to Green Bay

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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 April 15, 2025.