What airlines fly to Ontario?

Allegiant Air, American Airlines and United Airlines are the top three most popular airlines that fly to Ontario from Green Bay according to our data. Allegiant Air is the first choice among our users, with 35% of people opting to fly with this airline when traveling to Ontario. Keep in mind that there are 4 different airlines that fly to Ontario on a routine basis, so you have a few additional options to choose from.

What is the cheapest airline that flies from Green Bay Austin-Straubel to Ontario?

United Airlines and American Airlines are the most popular carriers operating from Green Bay Austin-Straubel to Ontario

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 November 2026.

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.

$377 Cheap Flights from Green Bay to Ontario in 2026/27

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Green Bay to Los Angeles

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1:22 pm - 6:50 pmGRB Green Bay Austin-Straubel-ONT Ontario

7h 28m1 stop Chicago O'Hare Intl

7:00 am - 5:11 pmONT Ontario-GRB Green Bay Austin-Straubel

8h 11m1 stop Chicago O'Hare Intl

$519United Airlines

Sat, Jan 23 - Sat, Jan 30

1:15 pm - 6:44 pmGRB Green Bay Austin-Straubel-ONT Ontario

7h 29m1 stop Chicago O'Hare Intl

11:52 pm - 10:12 amONT Ontario-GRB Green Bay Austin-Straubel

8h 20m1 stop Chicago O'Hare Intl

$519United Airlines

Sat, Dec 12 - Sat, Dec 19

9:45 am - 8:38 pmGRB Green Bay Austin-Straubel-ONT Ontario

12h 53m2 stops Chicago O'Hare Intl San Francisco

11:52 pm - 10:12 amONT Ontario-GRB Green Bay Austin-Straubel

8h 20m1 stop Chicago O'Hare Intl

$524United Airlines

Wed, Dec 16 - Wed, Dec 23

5:18 pm - 10:31 pmGRB Green Bay Austin-Straubel-ONT Ontario

7h 13m1 stop Chicago O'Hare Intl

6:53 pm - 10:30 amONT Ontario-GRB Green Bay Austin-Straubel

13h 37m2 stops San Francisco Chicago O'Hare Intl

$524United Airlines

Sat, May 1 - Wed, May 5

6:15 am - 5:36 pmGRB Green Bay Austin-Straubel-ONT Ontario

13h 21m2 stops Chicago O'Hare Intl San Francisco

11:52 pm - 10:12 amONT Ontario-GRB Green Bay Austin-Straubel

8h 20m1 stop Chicago O'Hare Intl

$524United Airlines

Wed, Dec 16 - Mon, Dec 21

8:03 am - 5:36 pmGRB Green Bay Austin-Straubel-ONT Ontario

11h 33m2 stops Chicago O'Hare Intl San Francisco

11:52 pm - 10:12 amONT Ontario-GRB Green Bay Austin-Straubel

8h 20m1 stop Chicago O'Hare Intl

$524United Airlines

Sat, Dec 12 - Sat, Dec 19

1:11 pm - 9:21 pmGRB Green Bay Austin-Straubel-ONT Ontario

10h 10m2 stops Chicago O'Hare Intl Houston George Bush Intcntl

6:53 pm - 10:30 amONT Ontario-GRB Green Bay Austin-Straubel

13h 37m2 stops San Francisco Chicago O'Hare Intl

$529United Airlines

Sat, May 1 - Wed, May 5

9:55 am - 5:35 pmGRB Green Bay Austin-Straubel-ONT Ontario

9h 40m2 stops Chicago O'Hare Intl San Francisco

5:00 am - 5:11 pmONT Ontario-GRB Green Bay Austin-Straubel

10h 11m2 stops Denver Intl Chicago O'Hare Intl

$529United Airlines

Thu, Jan 14 - Tue, Jan 19

5:18 pm - 10:31 pmGRB Green Bay Austin-Straubel-ONT Ontario

7h 13m1 stop Chicago O'Hare Intl

6:53 pm - 10:30 amONT Ontario-GRB Green Bay Austin-Straubel

13h 37m2 stops San Francisco Chicago O'Hare Intl

$534United Airlines

Sat, May 1 - Wed, May 5

5:30 am - 11:54 amGRB Green Bay Austin-Straubel-ONT Ontario

8h 24m1 stop Atlanta Hartsfield-Jackson

1:04 pm - 11:04 pmONT Ontario-GRB Green Bay Austin-Straubel

8h 00m1 stop Atlanta Hartsfield-Jackson

$875Delta

Wed, Feb 24 - Mon, Mar 1

Cheap last minute flights

Enter your travel dates to find the best prices.

1:37 pm - 6:47 pmGRB Green Bay Austin-Straubel-ONT Ontario

7h 10m1 stop Chicago O'Hare Intl

7:00 am - 4:52 pmONT Ontario-GRB Green Bay Austin-Straubel

7h 52m1 stop Chicago O'Hare Intl

$634United Airlines

Wed, Nov 18 - Wed, Nov 25

1:37 pm - 6:47 pmGRB Green Bay Austin-Straubel-ONT Ontario

7h 10m1 stop Chicago O'Hare Intl

9:25 am - 10:38 pmONT Ontario-GRB Green Bay Austin-Straubel

11h 13m2 stops San Francisco Chicago O'Hare Intl

$639United Airlines

Wed, Nov 18 - Tue, Nov 24

1:37 pm - 6:47 pmGRB Green Bay Austin-Straubel-ONT Ontario

7h 10m1 stop Chicago O'Hare Intl

6:00 am - 4:52 pmONT Ontario-GRB Green Bay Austin-Straubel

8h 52m2 stops Houston George Bush Intcntl Chicago O'Hare Intl

$639United Airlines

Wed, Nov 18 - Wed, Nov 25

1:37 pm - 8:51 pmGRB Green Bay Austin-Straubel-ONT Ontario

9h 14m2 stops Chicago O'Hare Intl Denver Intl

7:00 am - 4:52 pmONT Ontario-GRB Green Bay Austin-Straubel

7h 52m1 stop Chicago O'Hare Intl

$639United Airlines

Tue, Nov 17 - Wed, Nov 25

1:37 pm - 8:51 pmGRB Green Bay Austin-Straubel-ONT Ontario

9h 14m2 stops Chicago O'Hare Intl Denver Intl

9:25 am - 10:38 pmONT Ontario-GRB Green Bay Austin-Straubel

11h 13m2 stops San Francisco Chicago O'Hare Intl

$644United Airlines

Tue, Nov 17 - Tue, Nov 24

6:15 am - 12:33 pmGRB Green Bay Austin-Straubel-ONT Ontario

8h 18m2 stops Chicago O'Hare Intl Denver Intl

9:25 am - 10:38 pmONT Ontario-GRB Green Bay Austin-Straubel

11h 13m2 stops San Francisco Chicago O'Hare Intl

$644United Airlines

Wed, Nov 18 - Tue, Nov 24

6:15 am - 12:33 pmGRB Green Bay Austin-Straubel-ONT Ontario

8h 18m2 stops Chicago O'Hare Intl Denver Intl

9:25 am - 10:38 pmONT Ontario-GRB Green Bay Austin-Straubel

11h 13m2 stops San Francisco Chicago O'Hare Intl

$644United Airlines

Tue, Nov 17 - Wed, Nov 25

1:37 pm - 6:47 pmGRB Green Bay Austin-Straubel-ONT Ontario

7h 10m1 stop Chicago O'Hare Intl

7:00 am - 4:52 pmONT Ontario-GRB Green Bay Austin-Straubel

7h 52m1 stop Chicago O'Hare Intl

$679United Airlines

Wed, Nov 18 - Mon, Nov 23

6:15 am - 12:33 pmGRB Green Bay Austin-Straubel-ONT Ontario

8h 18m2 stops Chicago O'Hare Intl Denver Intl

7:00 am - 4:52 pmONT Ontario-GRB Green Bay Austin-Straubel

7h 52m1 stop Chicago O'Hare Intl

$684United Airlines

Wed, Nov 18 - Mon, Nov 23

1:37 pm - 6:47 pmGRB Green Bay Austin-Straubel-ONT Ontario

7h 10m1 stop Chicago O'Hare Intl

6:37 pm - 10:02 amONT Ontario-GRB Green Bay Austin-Straubel

13h 25m2 stops San Francisco Chicago O'Hare Intl

$684United Airlines

Wed, Nov 18 - Sun, Nov 22

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American Airlines flights from Green Bay to Ontario

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

American Airlines

Feb 24

GRB2:31 pmGreen Bay Austin-Straubel

9h 42m

2 stops

ONT10:13 pmOntario

Feb 28

ONT7:26 pmOntario

12h 12m

2 stops

GRB9:38 amGreen Bay Austin-Straubel

$609

American Airlines

Feb 14

GRB10:08 amGreen Bay Austin-Straubel

14h 05m

2 stops

ONT10:13 pmOntario

Feb 21

ONT7:26 pmOntario

12h 12m

2 stops

GRB9:38 amGreen Bay Austin-Straubel

$629

American Airlines

Nov 22

GRB2:37 pmGreen Bay Austin-Straubel

9h 15m

2 stops

ONT9:52 pmOntario

Nov 23

ONT6:30 amOntario

9h 52m

2 stops

GRB6:22 pmGreen Bay Austin-Straubel

$699

United Airlines flights from Green Bay to Ontario

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

United Airlines

Dec 12

GRB1:15 pmGreen Bay Austin-Straubel

7h 29m

1 stop

ONT6:44 pmOntario

Dec 19

ONT11:52 pmOntario

8h 20m

1 stop

GRB10:12 amGreen Bay Austin-Straubel

$519

United Airlines

Dec 16

GRB6:15 amGreen Bay Austin-Straubel

13h 21m

2 stops

ONT5:36 pmOntario

Dec 21

ONT11:52 pmOntario

8h 20m

1 stop

GRB10:12 amGreen Bay Austin-Straubel

$524

United Airlines

Jan 14

GRB9:55 amGreen Bay Austin-Straubel

9h 40m

2 stops

ONT5:35 pmOntario

Jan 19

ONT5:00 amOntario

10h 11m

2 stops

GRB5:11 pmGreen Bay Austin-Straubel

$529

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

Green BayOntario

GRB Green Bay Austin-Straubel - ONT Ontario

GRBONT

Green Bay Austin-Straubel

Sat 1/23

1:22 pm-6:50 pm

1 stop7h 28m

Ontario

Sat 1/30

7:00 am-5:11 pm

1 stop8h 11m

$519

Green BayOntario

GRB Green Bay Austin-Straubel - ONT Ontario

GRBONT

Green Bay Austin-Straubel

Sat 12/12

1:15 pm-6:44 pm

1 stop7h 29m

Ontario

Sat 12/19

11:52 pm-10:12 am

1 stop8h 20m

$519

Green BayOntario

GRB Green Bay Austin-Straubel - ONT Ontario

GRBONT

Green Bay Austin-Straubel

Wed 12/16

9:45 am-8:38 pm

2 stops12h 53m

Ontario

Wed 12/23

11:52 pm-10:12 am

1 stop8h 20m

$524

Green BayOntario

GRB Green Bay Austin-Straubel - ONT Ontario

GRBONT

Green Bay Austin-Straubel

Sat 5/1

5:18 pm-10:31 pm

1 stop7h 13m

Ontario

Wed 5/5

6:53 pm-10:30 am

2 stops13h 37m

$524

Green BayOntario

GRB Green Bay Austin-Straubel - ONT Ontario

GRBONT

Green Bay Austin-Straubel

Wed 12/16

6:15 am-5:36 pm

2 stops13h 21m

Ontario

Mon 12/21

11:52 pm-10:12 am

1 stop8h 20m

$524

Green BayOntario

GRB Green Bay Austin-Straubel - ONT Ontario

GRBONT

Green Bay Austin-Straubel

Sat 12/12

8:03 am-5:36 pm

2 stops11h 33m

Ontario

Sat 12/19

11:52 pm-10:12 am

1 stop8h 20m

$524

Green BayOntario

GRB Green Bay Austin-Straubel - ONT Ontario

GRBONT

Green Bay Austin-Straubel

Sat 5/1

1:11 pm-9:21 pm

2 stops10h 10m

Ontario

Wed 5/5

6:53 pm-10:30 am

2 stops13h 37m

$529

Green BayOntario

GRB Green Bay Austin-Straubel - ONT Ontario

GRBONT

Green Bay Austin-Straubel

Thu 1/14

9:55 am-5:35 pm

2 stops9h 40m

Ontario

Tue 1/19

5:00 am-5:11 pm

2 stops10h 11m

$529

Green BayOntario

GRB Green Bay Austin-Straubel - ONT Ontario

GRBONT

Green Bay Austin-Straubel

Sat 5/1

5:18 pm-10:31 pm

1 stop7h 13m

Ontario

Wed 5/5

6:53 pm-10:30 am

2 stops13h 37m

$534

Green BayOntario

GRB Green Bay Austin-Straubel - ONT Ontario

GRBONT

Green Bay Austin-Straubel

Wed 2/24

5:30 am-11:54 am

1 stop8h 24m

Ontario

Mon 3/1

1:04 pm-11:04 pm

1 stop8h 00m

$875

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted 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 month to fly to Ontario?

In general, May is the cheapest month to fly from Green Bay to Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $0. If you aren’t able to travel during the month of May, then book flights to Ontario from Green Bay during January instead. Flights to Ontario in January, while not as cheap as those in May, still average around $0.

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

You could potentially save up to 1% 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

Best Price Found	$377
Fastest flight time	7h 13m
Direct flights	None

The best one-way flight to Ontario from Green Bay in the past 72 hours is $377. The best round-trip flight deal from Green Bay to Ontario found on momondo in the last 72 hours is $519.

The fastest flight from Green Bay to Ontario takes 7h 13m

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

Search flight deals

Frequently asked questions about flying from Green Bay to Ontario

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 7h 13m 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 November 2026.
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 Delta, 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
Delta	PriceFrom $256	Free Cancellation	Rating 7.8 8,719 reviews		Search Delta 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.

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Cheap flights from Green Bay to Los Angeles from $377

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Green Bay to Los Angeles departing on 12/16. 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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How to get the cheapest flight ticket from Green Bay to Ontario

What is the cheapest month to fly to Ontario?

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

What is the cheapest airline that flies from Green Bay Austin-Straubel to Ontario?

What airlines fly to Ontario?

When to book flights from Green Bay to Ontario

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

Best Price Found

Fastest flight time

Direct flights

Frequently asked questions about flying from Green Bay to Ontario

Best airlines flying from Green Bay to Ontario

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

Why use momondo?

An easier way to manage your Ontario trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to the United States

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