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Cheap flights from Ontario to Green Bay from $270

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 1/6. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
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.
United Airlines Logo
11:59 pm - 9:45 amONT-GRB
7h 46m1 stop
United Airlines Logo
2:45 pm - 10:26 pmGRB-ONT
9h 41m1 stop
$289United Airlines
Find Deal
Sat, Mar 28 - Thu, Apr 2
United Airlines Logo
6:53 pm - 9:45 amONT-GRB
12h 52m2 stops
United Airlines Logo
2:45 pm - 10:26 pmGRB-ONT
9h 41m1 stop
$294United Airlines
Find Deal
Tue, Mar 31 - Sat, Apr 4
United Airlines Logo
11:59 pm - 9:45 amONT-GRB
7h 46m1 stop
United Airlines Logo
10:51 am - 8:46 pmGRB-ONT
11h 55m2 stops
$312United Airlines
Find Deal
Sat, Mar 28 - Thu, Apr 2
Delta Logo
12:12 pm - 10:37 pmONT-GRB
8h 25m1 stop
Delta Logo
5:15 am - 11:02 amGRB-ONT
7h 47m1 stop
$359Delta
Find Deal
Wed, Dec 3 - Sun, Dec 7
Delta Logo
10:25 pm - 11:33 amONT-GRB
11h 08m2 stops
Delta Logo
5:15 am - 11:02 amGRB-ONT
7h 47m1 stop
$364Delta
Find Deal
Wed, Dec 3 - Sun, Dec 7
United Airlines Logo
11:59 pm - 9:45 amONT-GRB
7h 46m1 stop
United Airlines Logo
2:45 pm - 10:26 pmGRB-ONT
9h 41m1 stop
$379United Airlines
Find Deal
Sat, Mar 28 - Wed, Apr 1
United Airlines Logo
6:00 am - 7:05 pmONT-GRB
11h 05m2 stops
United Airlines Logo
3:30 pm - 10:26 pmGRB-ONT
8h 56m1 stop
$384United Airlines
Find Deal
Tue, Apr 14 - Sat, Apr 18
American Airlines Logo
6:27 am - 4:23 pmONT-GRB
7h 56m2 stops
American Airlines Logo
11:20 am - 6:45 pmGRB-ONT
9h 25m2 stops
$389American Airlines
Find Deal
Sat, Jan 31 - Wed, Feb 4
American Airlines Logo
9:59 am - 9:58 pmONT-GRB
9h 59m2 stops
American Airlines Logo
6:00 am - 4:02 pmGRB-ONT
12h 02m2 stops
$399American Airlines
Find Deal
Wed, Dec 3 - Sun, Dec 7
Delta Logo
12:12 pm - 10:37 pmONT-GRB
8h 25m1 stop
Delta Logo
5:15 am - 11:02 amGRB-ONT
7h 47m1 stop
$404Delta
Find Deal
Fri, Dec 5 - Fri, Dec 12

Delta flights from Ontario to Green Bay

Our best Delta deals on Ontario to Green Bay flight tickets
Delta
Dec 3
ONT12:12 pmOntario
8h 25m
1 stop
GRB10:37 pmGreen Bay Austin-Straubel
Dec 7
GRB5:15 amGreen Bay Austin-Straubel
7h 47m
1 stop
ONT11:02 amOntario
$359
Find similar
Delta
Dec 3
ONT10:25 pmOntario
11h 08m
2 stops
GRB11:33 amGreen Bay Austin-Straubel
Dec 7
GRB5:15 amGreen Bay Austin-Straubel
7h 47m
1 stop
ONT11:02 amOntario
$364
Find similar
Delta
Dec 5
ONT12:12 pmOntario
8h 25m
1 stop
GRB10:37 pmGreen Bay Austin-Straubel
Dec 12
GRB5:15 amGreen Bay Austin-Straubel
7h 47m
1 stop
ONT11:02 amOntario
$404
Find similar

American Airlines flights from Ontario to Green Bay

Our best American Airlines deals on Ontario to Green Bay flight tickets
American Airlines
Jan 31
ONT6:27 amOntario
7h 56m
2 stops
GRB4:23 pmGreen Bay Austin-Straubel
Feb 4
GRB11:20 amGreen Bay Austin-Straubel
9h 25m
2 stops
ONT6:45 pmOntario
$389
Find similar
American Airlines
Dec 3
ONT9:59 amOntario
9h 59m
2 stops
GRB9:58 pmGreen Bay Austin-Straubel
Dec 7
GRB6:00 amGreen Bay Austin-Straubel
12h 02m
2 stops
ONT4:02 pmOntario
$399
Find similar
American Airlines
Dec 5
ONT12:46 pmOntario
8h 45m
2 stops
GRB11:31 pmGreen Bay Austin-Straubel
Dec 12
GRB7:17 amGreen Bay Austin-Straubel
10h 45m
2 stops
ONT4:02 pmOntario
$573
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 November 20, 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

Sat 3/28

11:59 pm-9:45 am

1 stop7h 46m

Green Bay Austin-Straubel

Thu 4/2

2:45 pm-10:26 pm

1 stop9h 41m

$289

OntarioGreen Bay

ONT - GRB

ONTGRB

Ontario

Tue 3/31

6:53 pm-9:45 am

2 stops12h 52m

Green Bay Austin-Straubel

Sat 4/4

2:45 pm-10:26 pm

1 stop9h 41m

$294

OntarioGreen Bay

ONT - GRB

ONTGRB

Ontario

Sat 3/28

11:59 pm-9:45 am

1 stop7h 46m

Green Bay Austin-Straubel

Thu 4/2

10:51 am-8:46 pm

2 stops11h 55m

$312

OntarioGreen Bay

ONT - GRB

ONTGRB

Ontario

Wed 12/3

12:12 pm-10:37 pm

1 stop8h 25m

Green Bay Austin-Straubel

Sun 12/7

5:15 am-11:02 am

1 stop7h 47m

$359

OntarioGreen Bay

ONT - GRB

ONTGRB

Ontario

Wed 12/3

10:25 pm-11:33 am

2 stops11h 08m

Green Bay Austin-Straubel

Sun 12/7

5:15 am-11:02 am

1 stop7h 47m

$364

OntarioGreen Bay

ONT - GRB

ONTGRB

Ontario

Sat 3/28

11:59 pm-9:45 am

1 stop7h 46m

Green Bay Austin-Straubel

Wed 4/1

2:45 pm-10:26 pm

1 stop9h 41m

$379

OntarioGreen Bay

ONT - GRB

ONTGRB

Ontario

Tue 4/14

6:00 am-7:05 pm

2 stops11h 05m

Green Bay Austin-Straubel

Sat 4/18

3:30 pm-10:26 pm

1 stop8h 56m

$384

OntarioGreen Bay

ONT - GRB

ONTGRB

Ontario

Sat 1/31

6:27 am-4:23 pm

2 stops7h 56m

Green Bay Austin-Straubel

Wed 2/4

11:20 am-6:45 pm

2 stops9h 25m

$389

OntarioGreen Bay

ONT - GRB

ONTGRB

Ontario

Wed 12/3

9:59 am-9:58 pm

2 stops9h 59m

Green Bay Austin-Straubel

Sun 12/7

6:00 am-4:02 pm

2 stops12h 02m

$399

OntarioGreen Bay

ONT - GRB

ONTGRB

Ontario

Fri 12/5

12:12 pm-10:37 pm

1 stop8h 25m

Green Bay Austin-Straubel

Fri 12/12

5:15 am-11:02 am

1 stop7h 47m

$404

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 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 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 56% 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.
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  • 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 7h 00m.

  • 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
9,029 reviews
Search United Airlines flights
American AirlinesPriceFrom $299Free CancellationRating
7.2
11,047 reviews
Search American Airlines flights
DeltaPriceFrom $371Free CancellationRating
7.9
8,002 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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