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Cheap flights from Ontario to Green Bay from $241

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Green Bay departing on 1/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Ontario to Green Bay

Cheap round-trip flights

Enter your travel dates to find the best prices.
Delta Logo
10:30 pm - 11:19 amONT-GRB
10h 49m2 stops
Delta Logo
4:00 pm - 11:52 pmGRB-ONT
9h 52m2 stops
$354Delta
Find Deal
Thu, Jan 15 - Mon, Jan 19
Delta Logo
11:36 am - 10:52 pmONT-GRB
9h 16m1 stop
Delta Logo
12:02 pm - 10:22 pmGRB-ONT
12h 20m2 stops
$375Delta
Find Deal
Tue, Oct 28 - Tue, Nov 4
American Airlines Logo
4:49 pm - 3:39 pmONT-GRB
20h 50m2 stops
American Airlines Logo
9:53 am - 9:11 pmGRB-ONT
13h 18m2 stops
$381American Airlines
Find Deal
Sat, Nov 1 - Sat, Nov 8
United Airlines Logo
7:02 am - 3:09 pmONT-GRB
6h 07m1 stop
United Airlines Logo
5:22 pm - 10:31 pmGRB-ONT
7h 09m1 stop
$404United Airlines
Find Deal
Wed, Oct 22 - Wed, Oct 29
Delta Logo
5:50 pm - 10:26 amONT-GRB
14h 36m2 stops
Delta Logo
12:02 pm - 10:22 pmGRB-ONT
12h 20m2 stops
$405Delta
Find Deal
Tue, Oct 28 - Tue, Nov 4
United Airlines Logo
7:02 am - 3:09 pmONT-GRB
6h 07m1 stop
United Airlines Logo
10:46 am - 8:44 pmGRB-ONT
11h 58m2 stops
$409United Airlines
Find Deal
Wed, Oct 22 - Wed, Oct 29
United Airlines Logo
6:36 pm - 10:05 amONT-GRB
13h 29m2 stops
United Airlines Logo
1:20 pm - 10:51 pmGRB-ONT
11h 31m2 stops
$414United Airlines
Find Deal
Wed, Oct 22 - Wed, Oct 29
United Airlines Logo
7:02 am - 3:09 pmONT-GRB
6h 07m1 stop
United Airlines Logo
5:25 pm - 10:30 pmGRB-ONT
7h 05m1 stop
$469United Airlines
Find Deal
Sat, Oct 18 - Fri, Oct 24
American Airlines Logo
11:59 pm - 2:40 pmONT-GRB
12h 41m2 stops
American Airlines Logo
9:49 am - 6:22 pmGRB-ONT
10h 33m2 stops
$522American Airlines
Find Deal
Wed, Nov 26 - Tue, Dec 2
American Airlines Logo
12:55 pm - 11:31 pmONT-GRB
8h 36m2 stops
American Airlines Logo
6:00 am - 4:01 pmGRB-ONT
12h 01m2 stops
$830American Airlines
Find Deal
Sat, Dec 6 - Mon, Dec 8

Delta flights from Ontario to Green Bay

Our best Delta deals on Ontario to Green Bay flight tickets
Delta
Jan 15
ONT10:30 pmOntario
10h 49m
2 stops
GRB11:19 amGreen Bay Austin-Straubel
Jan 19
GRB4:00 pmGreen Bay Austin-Straubel
9h 52m
2 stops
ONT11:52 pmOntario
$354
Find similar
Delta
Oct 28
ONT11:36 amOntario
9h 16m
1 stop
GRB10:52 pmGreen Bay Austin-Straubel
Nov 4
GRB12:02 pmGreen Bay Austin-Straubel
12h 20m
2 stops
ONT10:22 pmOntario
$375
Find similar
Delta
Oct 28
ONT5:50 pmOntario
14h 36m
2 stops
GRB10:26 amGreen Bay Austin-Straubel
Nov 4
GRB12:02 pmGreen Bay Austin-Straubel
12h 20m
2 stops
ONT10:22 pmOntario
$405
Find similar

American Airlines flights from Ontario to Green Bay

Our best American Airlines deals on Ontario to Green Bay flight tickets
American Airlines
Nov 1
ONT4:49 pmOntario
20h 50m
2 stops
GRB3:39 pmGreen Bay Austin-Straubel
Nov 8
GRB9:53 amGreen Bay Austin-Straubel
13h 18m
2 stops
ONT9:11 pmOntario
$381
Find similar
American Airlines
Nov 26
ONT11:59 pmOntario
12h 41m
2 stops
GRB2:40 pmGreen Bay Austin-Straubel
Dec 2
GRB9:49 amGreen Bay Austin-Straubel
10h 33m
2 stops
ONT6:22 pmOntario
$522
Find similar
American Airlines
Dec 6
ONT12:55 pmOntario
8h 36m
2 stops
GRB11:31 pmGreen Bay Austin-Straubel
Dec 8
GRB6:00 amGreen Bay Austin-Straubel
12h 01m
2 stops
ONT4:01 pmOntario
$830
Find similar

momondo 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, momondo users made 832,500 searches. Data last updated October 6, 2025.
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

Thu 1/15

10:30 pm-11:19 am

2 stops10h 49m

Green Bay Austin-Straubel

Mon 1/19

4:00 pm-11:52 pm

2 stops9h 52m

$354

OntarioGreen Bay

ONT - GRB

ONTGRB

Ontario

Tue 10/28

11:36 am-10:52 pm

1 stop9h 16m

Green Bay Austin-Straubel

Tue 11/4

12:02 pm-10:22 pm

2 stops12h 20m

$375

OntarioGreen Bay

ONT - GRB

ONTGRB

Ontario

Sat 11/1

4:49 pm-3:39 pm

2 stops20h 50m

Green Bay Austin-Straubel

Sat 11/8

9:53 am-9:11 pm

2 stops13h 18m

$381

OntarioGreen Bay

ONT - GRB

ONTGRB

Ontario

Wed 10/22

7:02 am-3:09 pm

1 stop6h 07m

Green Bay Austin-Straubel

Wed 10/29

5:22 pm-10:31 pm

1 stop7h 09m

$404

OntarioGreen Bay

ONT - GRB

ONTGRB

Ontario

Tue 10/28

5:50 pm-10:26 am

2 stops14h 36m

Green Bay Austin-Straubel

Tue 11/4

12:02 pm-10:22 pm

2 stops12h 20m

$405

OntarioGreen Bay

ONT - GRB

ONTGRB

Ontario

Wed 10/22

7:02 am-3:09 pm

1 stop6h 07m

Green Bay Austin-Straubel

Wed 10/29

10:46 am-8:44 pm

2 stops11h 58m

$409

OntarioGreen Bay

ONT - GRB

ONTGRB

Ontario

Wed 10/22

6:36 pm-10:05 am

2 stops13h 29m

Green Bay Austin-Straubel

Wed 10/29

1:20 pm-10:51 pm

2 stops11h 31m

$414

OntarioGreen Bay

ONT - GRB

ONTGRB

Ontario

Sat 10/18

7:02 am-3:09 pm

1 stop6h 07m

Green Bay Austin-Straubel

Fri 10/24

5:25 pm-10:30 pm

1 stop7h 05m

$469

OntarioGreen Bay

ONT - GRB

ONTGRB

Ontario

Wed 11/26

11:59 pm-2:40 pm

2 stops12h 41m

Green Bay Austin-Straubel

Tue 12/2

9:49 am-6:22 pm

2 stops10h 33m

$522

OntarioGreen Bay

ONT - GRB

ONTGRB

Ontario

Sat 12/6

12:55 pm-11:31 pm

2 stops8h 36m

Green Bay Austin-Straubel

Mon 12/8

6:00 am-4:01 pm

2 stops12h 01m

$830

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 18 resultsSorted by cheapest first
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See travel insights to Green Bay from

How to get the cheapest flight ticket from Ontario to Green Bay

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between Ontario and Green Bay?

What is the cheapest day to depart on your flight to Green Bay?

The cheapest day to depart from Ontario to Green Bay is on a Thursday when prices can be found for as low as $493. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Ontario to Green Bay for around $765.

What is the cheapest time of day to depart on your flight to Green Bay?

Our most recent data shows that the best time of day to fly to Green Bay is in the evening. Flights from Ontario to Green Bay during this time can be as low as $438. At noon is when there is more demand to fly to Green Bay, so prices are often more expensive at around $507 per ticket.

Can stopping save me money on Ontario to Green Bay flights?

You could potentially save up to 73% on your flight if you consider stops on a Ontario to Green Bay flight.

When to book flights from Ontario to Green Bay

Are you open to changing your travel dates? Check out the ideal times to fly from Ontario to Green Bay according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Ontario to Green Bay (ONT to GRB) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to Green Bay

Direct flights

None
There are no direct flights from Ontario to Green Bay. There are no popular flight routes from Ontario to Green Bay.
Search flight deals

  • How far is Ontario to Green Bay Austin-Straubel by plane?

    The straight-line distance from Ontario to Green Bay Austin-Straubel is 1727.6 mi. By plane, this route typically takes 6h 07m.

  • When did momondo last update prices for flights from Ontario Airport to Green Bay Austin-Straubel Airport?

    Prices for flights from Ontario Airport to Green Bay Austin-Straubel Airport were last updated today.

  • How many operators does momondo search for flights from Ontario Airport to Green Bay Austin-Straubel Airport?

  • How old do you have to be to fly from Ontario Airport to Green Bay Austin-Straubel Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to Green Bay Austin-Straubel Airport.

  • What documentation or ID do you need to fly to Green Bay Austin-Straubel Airport?

    The necessary travel and health documents for your Green Bay Austin-Straubel Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from Ontario to Green Bay?

Best airlines flying from Ontario to Green Bay

Compare and see reviews for airlines that fly from Ontario to Green Bay with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $298Free CancellationRating
7.4
8,953 reviews
Search United Airlines flights
American AirlinesPriceFrom $299Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
DeltaPriceFrom $371Free CancellationRating
7.9
7,969 reviews
Search Delta flights

Traveling to a place near Green Bay?

Book flights to Green Bay if you plan to visit one of these locations
Sturgeon Bay
Manitowoc
Marinette
Shawano
De Pere

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to Green Bay?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Ontario to Green Bay. momondo saves you time and could save you money on your trip.

Can I find flights from Ontario to Green Bay with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Ontario to Green Bay flights to just show those with flexible booking policies.

How can momondo help me find flights from Ontario to Green Bay?

momondo provides multiple filters to help you find the best flight to Green Bay from Ontario. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Ontario to Green Bay right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Ontario to Green Bay flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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