How long is the flight from Ontario to Green Bay?

There are many flights that can get you from Ontario to Green Bay in 9h 42m. Fly via United Airlines to get the fastest option. There are 1720 mi between Ontario and Green Bay.

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

Delta, at $225, was found to be the cheapest airline from Ontario to Green Bay.Alternate airlines to your destination round-trip include American Airlines and United Airlines. You may be able to fly from Ontario to Green Bay for 56% less than the average price by searching for these airlines.

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.

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).

What are the most popular airlines that fly from Ontario to Green Bay?

Before booking your flight from Ontario to Green Bay check out the most popular airlines for this route: United Airlines, American Airlines or Delta.

Most accurate provider : When it comes to deals on Ontario-Green Bay flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Ontario-Green Bay flight deals on Cheapflights vs. eDreams >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.

$244+ Flights from Ontario to Green Bay

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Cheap 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 December 16, 2025.

Tue 12/305:05 amONT - GRB

2 stops8h 02mUnited Airlines

Sat 1/33:42 pmGRB - ONT

1 stop8h 43mUnited Airlines

Deal found 12/15

$609

Tue 12/236:04 amONT - GRB

2 stops10h 58mUnited Airlines

Sat 12/275:22 pmGRB - ONT

1 stop7h 03mUnited Airlines

Deal found 12/14

$790

Wed 12/176:00 amONT - GRB

2 stops11h 00mUnited Airlines

Thu 12/253:42 pmGRB - ONT

1 stop8h 43mUnited Airlines

Deal found 12/14

$905

Sat 12/275:05 amONT - GRB

2 stops11h 58mUnited Airlines

Sun 12/285:22 pmGRB - ONT

1 stop7h 03mUnited Airlines

Deal found 12/14

$1,390

Fri 12/2611:59 pmONT - GRB

1 stop14h 48mUnited Airlines

Sun 12/283:42 pmGRB - ONT

1 stop8h 43mUnited Airlines

Deal found 12/16

$1,744

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 December 16, 2025.

Sat 1/175:05 amONT - GRB

2 stops9h 42mUnited Airlines

Wed 1/2110:42 amGRB - ONT

2 stops9h 01mUnited Airlines

Deal found 12/14

$393

Wed 2/256:37 pmONT - GRB

2 stops13h 13mUnited Airlines

Sat 3/72:54 pmGRB - ONT

1 stop9h 31mUnited Airlines

Deal found 12/13

$404

Tue 12/305:05 amONT - GRB

2 stops8h 02mUnited Airlines

Sat 1/33:42 pmGRB - ONT

1 stop8h 43mUnited Airlines

Deal found 12/15

$609

Sat 12/2710:50 amONT - GRB

2 stops10h 46mAmerican Airlines

Sun 12/287:00 amGRB - ONT

2 stops13h 16mAmerican Airlines

Deal found 12/13

$1,439

Fri 2/276:37 pmONT - GRB

2 stops13h 13mUnited Airlines

Sat 3/710:34 amGRB - ONT

2 stops12h 16mUnited Airlines

Deal found 12/13

$644

Sat 12/275:05 amONT - GRB

2 stops11h 58mUnited Airlines

Sun 12/285:22 pmGRB - ONT

1 stop7h 03mUnited Airlines

Deal found 12/14

$1,390

Fri 12/2611:59 pmONT - GRB

1 stop14h 48mUnited Airlines

Sun 12/283:42 pmGRB - ONT

1 stop8h 43mUnited Airlines

Deal found 12/15

$1,744

Last-minute flights from Ontario to Green Bay
Discover last-minute flight deals from Ontario to Green Bay. Data last updated December 16, 2025 and is based on user searches.

Mon 12/1512:12 pmONT - GRB

1 stop8h 25mDelta

Mon 12/2211:11 amGRB - ONT

2 stops14h 12mDelta

Deal found 12/14

$489

Mon 12/1512:55 pmONT - GRB

2 stops8h 36mAmerican Airlines

Mon 12/2210:09 amGRB - ONT

3 stops10h 19mAmerican Airlines

Deal found 12/14

$1,217

Wed 12/176:00 amONT - GRB

2 stops11h 00mUnited Airlines

Thu 12/253:42 pmGRB - ONT

1 stop8h 43mUnited Airlines

Deal found 12/14

$905

Tue 12/236:04 amONT - GRB

2 stops10h 58mUnited Airlines

Sat 12/275:22 pmGRB - ONT

1 stop7h 03mUnited Airlines

Deal found 12/14

$790

Sat 12/275:05 amONT - GRB

2 stops11h 58mUnited Airlines

Sun 12/285:22 pmGRB - ONT

1 stop7h 03mUnited Airlines

Deal found 12/14

$1,390

Tue 12/305:05 amONT - GRB

2 stops8h 02mUnited Airlines

Sat 1/33:42 pmGRB - ONT

1 stop8h 43mUnited Airlines

Deal found 12/15

$609

Sat 1/175:05 amONT - GRB

2 stops9h 42mUnited Airlines

Wed 1/2110:42 amGRB - ONT

2 stops12h 16mUnited Airlines

Deal found 12/15

$393

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 December 16, 2025.

Wed 1/2812:41 pmONT - GRB

1 stop7h 49mDelta

Deal found 12/13

$244

Mon 6/110:59 pmONT - GRB

2 stops9h 23mDelta

Deal found 12/14

$284

Wed 1/286:00 amONT - GRB

3 stops31h 07mUnited Airlines

Deal found 12/13

$383

Fri 12/2611:59 pmONT - GRB

1 stop14h 48mUnited Airlines

Deal found 12/15

$894

Mon 6/16:02 amONT - GRB

3 stops11h 03mUnited Airlines

Deal found 12/14

$1,332

Find flight deals from Ontario to Green Bay

Most accurate provider	eDreams 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$393 (United Airlines)
One-way from	$244 (Delta)
Popular in	December
Cheapest in	January
Average price	$847

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

Search Deals

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

Search Deals

From Ontario to Green Bay Austin-Straubel

Search Deals

One-way flight from Ontario to Green Bay Austin-Straubel

Search Deals

Highest demand for flights based on searches. 14% potential increase in price ($84 potential increase over avg. RT price).

Search Deals

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

Search Deals

Average for round-trip flights in December 2025

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

OntarioGreen Bay

ONT - GRB

ONTGRB

Ontario

Sat 1/17

5:05 am-4:47 pm

2 stops9h 42m

Green Bay Austin-Straubel

Wed 1/21

10:42 am-5:43 pm

2 stops9h 01m

$393

OntarioGreen Bay

ONT - GRB

ONTGRB

Ontario

Wed 2/25

6:37 pm-9:50 am

2 stops13h 13m

Green Bay Austin-Straubel

Sat 3/7

2:54 pm-10:25 pm

1 stop9h 31m

$404

OntarioGreen Bay

ONT - GRB

ONTGRB

Ontario

Tue 12/30

5:05 am-3:07 pm

2 stops8h 02m

Green Bay Austin-Straubel

Sat 1/3

3:42 pm-10:25 pm

1 stop8h 43m

$609

OntarioGreen Bay

ONT - GRB

ONTGRB

Ontario

Fri 2/27

6:37 pm-9:50 am

2 stops13h 13m

Green Bay Austin-Straubel

Sat 3/7

10:34 am-8:50 pm

2 stops12h 16m

$644

OntarioGreen Bay

ONT - GRB

ONTGRB

Ontario

Sat 12/27

5:05 am-7:03 pm

2 stops11h 58m

Green Bay Austin-Straubel

Sun 12/28

5:22 pm-10:25 pm

1 stop7h 03m

$1,390

OntarioGreen Bay

ONT - GRB

ONTGRB

Ontario

Sat 12/27

10:50 am-11:36 pm

2 stops10h 46m

Green Bay Austin-Straubel

Sun 12/28

7:00 am-6:16 pm

2 stops13h 16m

$1,439

OntarioGreen Bay

ONT - GRB

ONTGRB

Ontario

Fri 12/26

11:59 pm-4:47 pm

1 stop14h 48m

Green Bay Austin-Straubel

Sun 12/28

3:42 pm-10:25 pm

1 stop8h 43m

$1,744

OntarioGreen Bay

ONT - GRB

ONTGRB

Ontario

Wed 1/28

12:41 pm-10:30 pm

1 stop7h 49m

$244

OntarioGreen Bay

ONT - GRB

ONTGRB

Ontario

Mon 6/1

10:59 pm-10:22 am

2 stops9h 23m

$284

OntarioGreen Bay

ONT - GRB

ONTGRB

Ontario

Wed 1/28

6:00 am-3:07 pm

3 stops31h 07m

$383

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/13

Showing 1-10 of 12 results

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 December.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy2 stars	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*1 star
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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Ontario-Green Bay flight deals on Cheapflights vs. eDreams >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, July is the cheapest month in which you can book a flight from Ontario to Green Bay (average of $105). Flying from Ontario to Green Bay in February is currently the most expensive (average of $282). 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?

One of the essential ways to save on airfare from Ontario to Green Bay is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight at noon could potentially save you up to 16% on airfare.

Reviews of airlines servicing Green Bay

Peruse reviews from past customers who have flown with Delta, United Airlines, and American Airlines from Ontario to Green Bay to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

7.9

Good

8,008 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

7.9

Good

8,008 reviews

Delta

7.9

Good

8,008 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

9,092 reviews

Delta

7.9

Good

8,008 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

11,049 reviews

Delta

7.9

Good

8,008 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

How long is the flight from Ontario to Green Bay?
There are many flights that can get you from Ontario to Green Bay in 9h 42m. Fly via United Airlines to get the fastest option. There are 1720 mi between Ontario and Green Bay.
What are the cheapest airlines flying from Ontario to Green Bay round-trip?
Delta, at $225, was found to be the cheapest airline from Ontario to Green Bay.Alternate airlines to your destination round-trip include American Airlines and United Airlines. You may be able to fly from Ontario to Green Bay for 56% 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, July is the cheapest month in which you can book a flight from Ontario to Green Bay (average of $105). Flying from Ontario to Green Bay in February is currently the most expensive (average of $282). 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

Manitowoc

Browse thousands of different options on Cheapflights for your next trip

Top 3 airlines flying from Ontario to Green Bay

Airline	Cheapest	Average	Flexibility	On-time
American Airlines	Cheapest$299	Average$867	FlexibilityNo cancel fee	On-time71%
United Airlines	Cheapest$368	Average$608	FlexibilityNo cancel fee	On-time69%
Delta	Cheapest$371	Average$464	FlexibilityNo cancel fee	On-timeN/A

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$244+ 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 1/28. 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

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 December 16, 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 December 16, 2025.

Find 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

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 December.

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?

Reviews of airlines servicing Green Bay

Peruse reviews from past customers who have flown with Delta, United Airlines, and American Airlines from Ontario to Green Bay to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

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.

How long is the flight from Ontario to Green Bay?

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 Green Bay?

Browse thousands of different options on Cheapflights for your next trip

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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 3 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 December 16, 2025.