What airlines fly to Ontario?

American Airlines, Delta and United Airlines are the top three most popular airlines that fly to Ontario from Green Bay according to our data. American Airlines is the first choice among our users, with 46% of people opting to fly with this airline when traveling to Ontario. Keep in mind that there are 3 different airlines that fly to Ontario on a routine basis, so you have a few additional options to choose from.

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

Prices for flights from Green Bay Austin-Straubel Airport to Ontario Airport are updated daily.

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

The number of operators available for flights from Green Bay Austin-Straubel Airport to Ontario Airport is 1 as of December 2025.

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

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Green Bay Austin-Straubel Airport to Ontario Airport.

What documentation or ID do you need to fly to Ontario Airport?

The travel and health documents required for your trip to Ontario Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Ontario Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$224 Cheap Flights from Green Bay to Ontario in 2025/26

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Find the cheapest flights from Green Bay to Los Angeles

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

5:28 pm - 10:25 pm

GRB

ONT

6h 57m1 stop

11:59 pm - 9:59 am

ONT

GRB

8h 00m1 stop

$309United Airlines

Wed, Mar 11 - Mon, Mar 16

5:24 am - 11:31 am

GRB

ONT

8h 07m1 stop

12:41 pm - 10:29 pm

ONT

GRB

7h 48m1 stop

$334Delta

Thu, Jan 8 - Wed, Jan 14

5:24 am - 11:31 am

GRB

ONT

8h 07m1 stop

10:30 pm - 10:35 am

ONT

GRB

10h 05m2 stops

$339Delta

Thu, Jan 8 - Wed, Jan 14

10:42 am - 8:58 pm

GRB

ONT

12h 16m2 stops

5:05 am - 4:47 pm

ONT

GRB

9h 42m2 stops

$344United Airlines

Wed, Jan 7 - Tue, Jan 13

5:00 am - 11:31 am

GRB

ONT

8h 31m1 stop

12:41 pm - 10:30 pm

ONT

GRB

7h 49m1 stop

$354Delta

Thu, Jan 22 - Thu, Jan 29

3:00 pm - 10:26 pm

GRB

ONT

9h 26m1 stop

7:00 am - 3:12 pm

ONT

GRB

6h 12m1 stop

$399United Airlines

Thu, Apr 23 - Tue, Apr 28

11:15 am - 9:05 pm

GRB

ONT

11h 50m2 stops

12:41 pm - 10:30 pm

ONT

GRB

7h 49m1 stop

$403Delta

Thu, Jan 22 - Thu, Jan 29

3:00 pm - 10:26 pm

GRB

ONT

9h 26m1 stop

6:00 am - 9:42 pm

ONT

GRB

13h 42m2 stops

$404United Airlines

Thu, Apr 23 - Tue, Apr 28

10:42 am - 9:58 pm

GRB

ONT

13h 16m2 stops

6:00 am - 7:03 pm

ONT

GRB

11h 03m2 stops

$411United Airlines

Sat, Jan 17 - Sat, Jan 24

3:00 pm - 10:26 pm

GRB

ONT

9h 26m1 stop

7:00 am - 3:12 pm

ONT

GRB

6h 12m1 stop

$419United Airlines

Sat, May 2 - Sun, May 10

United Airlines flights from Green Bay to Ontario

Our best United Airlines deals on Green Bay to Ontario flight tickets

United Airlines

Mar 11

GRB5:28 pmGreen Bay Austin-Straubel

6h 57m

1 stop

ONT10:25 pmOntario

Mar 16

ONT11:59 pmOntario

8h 00m

1 stop

GRB9:59 amGreen Bay Austin-Straubel

$309

Find similar

United Airlines

Jan 7

GRB10:42 amGreen Bay Austin-Straubel

12h 16m

2 stops

ONT8:58 pmOntario

Jan 13

ONT5:05 amOntario

9h 42m

2 stops

GRB4:47 pmGreen Bay Austin-Straubel

$344

Find similar

United Airlines

Apr 23

GRB3:00 pmGreen Bay Austin-Straubel

9h 26m

1 stop

ONT10:26 pmOntario

Apr 28

ONT7:00 amOntario

6h 12m

1 stop

GRB3:12 pmGreen Bay Austin-Straubel

$399

Find similar

Delta flights from Green Bay to Ontario

Our best Delta deals on Green Bay to Ontario flight tickets

Delta

Jan 8

GRB5:24 amGreen Bay Austin-Straubel

8h 07m

1 stop

ONT11:31 amOntario

Jan 14

ONT12:41 pmOntario

7h 48m

1 stop

GRB10:29 pmGreen Bay Austin-Straubel

$334

Find similar

Delta

Jan 8

GRB5:24 amGreen Bay Austin-Straubel

8h 07m

1 stop

ONT11:31 amOntario

Jan 14

ONT10:30 pmOntario

10h 05m

2 stops

GRB10:35 amGreen Bay Austin-Straubel

$339

Find similar

Delta

Jan 22

GRB5:00 amGreen Bay Austin-Straubel

8h 31m

1 stop

ONT11:31 amOntario

Jan 29

ONT12:41 pmOntario

7h 49m

1 stop

GRB10:30 pmGreen Bay Austin-Straubel

$354

Find similar

Fly from

Fly to

Route

Depart

Return

Price

Green BayOntario

GRB - ONT

GRBONT

Green Bay Austin-Straubel

Wed 3/11

5:28 pm-10:25 pm

1 stop6h 57m

Ontario

Mon 3/16

11:59 pm-9:59 am

1 stop8h 00m

$309

Green BayOntario

GRB - ONT

GRBONT

Green Bay Austin-Straubel

Thu 1/8

5:24 am-11:31 am

1 stop8h 07m

Ontario

Wed 1/14

12:41 pm-10:29 pm

1 stop7h 48m

$334

Green BayOntario

GRB - ONT

GRBONT

Green Bay Austin-Straubel

Thu 1/8

5:24 am-11:31 am

1 stop8h 07m

Ontario

Wed 1/14

10:30 pm-10:35 am

2 stops10h 05m

$339

Green BayOntario

GRB - ONT

GRBONT

Green Bay Austin-Straubel

Wed 1/7

10:42 am-8:58 pm

2 stops12h 16m

Ontario

Tue 1/13

5:05 am-4:47 pm

2 stops9h 42m

$344

Green BayOntario

GRB - ONT

GRBONT

Green Bay Austin-Straubel

Thu 1/22

5:00 am-11:31 am

1 stop8h 31m

Ontario

Thu 1/29

12:41 pm-10:30 pm

1 stop7h 49m

$354

Green BayOntario

GRB - ONT

GRBONT

Green Bay Austin-Straubel

Thu 4/23

3:00 pm-10:26 pm

1 stop9h 26m

Ontario

Tue 4/28

7:00 am-3:12 pm

1 stop6h 12m

$399

Green BayOntario

GRB - ONT

GRBONT

Green Bay Austin-Straubel

Thu 1/22

11:15 am-9:05 pm

2 stops11h 50m

Ontario

Thu 1/29

12:41 pm-10:30 pm

1 stop7h 49m

$403

Green BayOntario

GRB - ONT

GRBONT

Green Bay Austin-Straubel

Thu 4/23

3:00 pm-10:26 pm

1 stop9h 26m

Ontario

Tue 4/28

6:00 am-9:42 pm

2 stops13h 42m

$404

Green BayOntario

GRB - ONT

GRBONT

Green Bay Austin-Straubel

Sat 1/17

10:42 am-9:58 pm

2 stops13h 16m

Ontario

Sat 1/24

6:00 am-7:03 pm

2 stops11h 03m

$411

Green BayOntario

GRB - ONT

GRBONT

Green Bay Austin-Straubel

Sat 5/2

3:00 pm-10:26 pm

1 stop9h 26m

Ontario

Sun 5/10

7:00 am-3:12 pm

1 stop6h 12m

$419

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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

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

Prices

Airlines

What is the cheapest day to depart on your flight to Ontario?

The cheapest day to depart on your flight to Ontario is on a Thursday when prices can be found for as low as $487. This is often the case because there is less demand to fly during this day of the week. When flying out on a Friday, the most expensive travel day of the week, you can expect to see flight prices from Green Bay to Ontario for around $598.

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

You could potentially save up to 8% on your flight if you consider stops on a Green Bay to Ontario flight.

When to book flights from Green Bay to Ontario

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

Estimated round-trip price

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

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

Fastest flight time	6h 56m
Direct flights	None

The fastest flight from Green Bay to Ontario takes 6h 56m

There are no direct flights from Green Bay to Ontario. There are no popular flight routes from Green Bay to Ontario.

Search flight deals

How far is Green Bay Austin-Straubel to Ontario by plane?
The straight-line distance from Green Bay Austin-Straubel to Ontario is 1727.6 mi. Typically, this will take 6h 56m by plane in normal conditions.
When did momondo last update prices for flights from Green Bay Austin-Straubel Airport to Ontario Airport?
Prices for flights from Green Bay Austin-Straubel Airport to Ontario Airport are updated daily.
How many operators does momondo search for flights from Green Bay Austin-Straubel Airport to Ontario Airport?
The number of operators available for flights from Green Bay Austin-Straubel Airport to Ontario Airport is 1 as of December 2025.
How old do you have to be to fly from Green Bay Austin-Straubel Airport to Ontario Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Green Bay Austin-Straubel Airport to Ontario Airport.
What documentation or ID do you need to fly to Ontario Airport?
The travel and health documents required for your trip to Ontario Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Ontario Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular airline from Green Bay to Ontario?
momondo data reveals that the most frequently booked airline on the route from Green Bay to Ontario is United Airlines, representing 100% of all bookings.

Best airlines flying from Green Bay to Ontario

Compare and see reviews for airlines that fly from Green Bay to Ontario with momondo

Airline	Rating	Free Cancellation	Price
United Airlines	PriceFrom $288	Free Cancellation	Rating 7.4 9,111 reviews		Search United Airlines flights

Why use momondo?

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

It is quick and easy to find Green Bay to Ontario flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Ontario that suits you.

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

Yes. momondo enables you to select and highlight flights to Ontario from Green Bay with this policy.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Green Bay to Ontario.

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

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