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 34% 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 Delta 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 2 as of September 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.

$292 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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1:05 pm - 8:25 pmGRB Green Bay Austin-Straubel-ONT Ontario

9h 20m1 stop Atlanta Hartsfield-Jackson

12:16 pm - 10:17 pmONT Ontario-GRB Green Bay Austin-Straubel

8h 01m1 stop Atlanta Hartsfield-Jackson

$379Delta

Wed, Oct 28 - Sat, Oct 31

5:30 am - 11:06 amGRB Green Bay Austin-Straubel-ONT Ontario

7h 36m1 stop Atlanta Hartsfield-Jackson

12:16 pm - 10:17 pmONT Ontario-GRB Green Bay Austin-Straubel

8h 01m1 stop Atlanta Hartsfield-Jackson

$379Delta

Tue, Oct 27 - Sat, Oct 31

5:30 am - 11:06 amGRB Green Bay Austin-Straubel-ONT Ontario

7h 36m1 stop Atlanta Hartsfield-Jackson

12:16 pm - 10:17 pmONT Ontario-GRB Green Bay Austin-Straubel

8h 01m1 stop Atlanta Hartsfield-Jackson

$379Delta

Thu, Oct 29 - Sat, Oct 31

5:30 am - 11:06 amGRB Green Bay Austin-Straubel-ONT Ontario

7h 36m1 stop Atlanta Hartsfield-Jackson

12:16 pm - 10:17 pmONT Ontario-GRB Green Bay Austin-Straubel

8h 01m1 stop Atlanta Hartsfield-Jackson

$379Delta

Mon, Oct 26 - Sat, Oct 31

3:45 pm - 10:49 pmGRB Green Bay Austin-Straubel-ONT Ontario

9h 04m1 stop Chicago O'Hare Intl

6:59 am - 4:52 pmONT Ontario-GRB Green Bay Austin-Straubel

7h 53m1 stop Chicago O'Hare Intl

$406United Airlines

Sat, Oct 10 - Sat, Oct 31

3:45 pm - 10:49 pmGRB Green Bay Austin-Straubel-ONT Ontario

9h 04m1 stop Chicago O'Hare Intl

9:25 am - 10:43 pmONT Ontario-GRB Green Bay Austin-Straubel

11h 18m2 stops San Francisco Chicago O'Hare Intl

$411United Airlines

Sat, Oct 10 - Sat, Oct 31

6:00 am - 3:16 pmGRB Green Bay Austin-Straubel-ONT Ontario

11h 16m2 stops Chicago O'Hare Intl Phoenix Sky Harbor Intl

6:15 am - 6:17 pmONT Ontario-GRB Green Bay Austin-Straubel

10h 02m2 stops Phoenix Sky Harbor Intl Chicago O'Hare Intl

$466American Airlines

Sat, Oct 10 - Sat, Oct 31

10:02 am - 9:55 pmGRB Green Bay Austin-Straubel-ONT Ontario

13h 53m2 stops Chicago O'Hare Intl Phoenix Sky Harbor Intl

7:45 pm - 9:32 amONT Ontario-GRB Green Bay Austin-Straubel

11h 47m2 stops Phoenix Sky Harbor Intl Chicago O'Hare Intl

$470American Airlines

Wed, Nov 18 - Sun, Nov 22

1:17 pm - 10:51 pmGRB Green Bay Austin-Straubel-ONT Ontario

11h 34m2 stops Chicago O'Hare Intl San Francisco

7:00 am - 4:54 pmONT Ontario-GRB Green Bay Austin-Straubel

7h 54m1 stop Chicago O'Hare Intl

$481United Airlines

Sat, Oct 10 - Sat, Oct 24

2:46 pm - 8:48 pmGRB Green Bay Austin-Straubel-ONT Ontario

8h 02m1 stop Chicago O'Hare Intl

7:50 pm - 9:22 amONT Ontario-GRB Green Bay Austin-Straubel

11h 32m2 stops Phoenix Sky Harbor Intl Chicago O'Hare Intl

$484American Airlines

Wed, Feb 24 - Mon, Mar 1

Cheap last minute flights

Enter your travel dates to find the best prices.

3:42 pm - 10:59 pmGRB Green Bay Austin-Straubel-ONT Ontario

9h 17m1 stop Chicago O'Hare Intl

1:24 pm - 11:19 pmONT Ontario-GRB Green Bay Austin-Straubel

7h 55m2 stops Denver Intl Chicago O'Hare Intl

$864United Airlines

Tue, Sep 22 - Thu, Sep 24

9:30 am - 8:01 pmGRB Green Bay Austin-Straubel-ONT Ontario

12h 31m2 stops Chicago O'Hare Intl San Francisco

1:24 pm - 11:19 pmONT Ontario-GRB Green Bay Austin-Straubel

7h 55m2 stops Denver Intl Chicago O'Hare Intl

$869United Airlines

Tue, Sep 22 - Thu, Sep 24

1:17 pm - 10:51 pmGRB Green Bay Austin-Straubel-ONT Ontario

11h 34m2 stops Chicago O'Hare Intl San Francisco

7:00 am - 12:30 pmONT Ontario-GRB Green Bay Austin-Straubel

27h 30m1 stop Chicago O'Hare Intl

$897United Airlines

Mon, Sep 21 - Fri, Sep 25

1:17 pm - 10:51 pmGRB Green Bay Austin-Straubel-ONT Ontario

11h 34m2 stops Chicago O'Hare Intl San Francisco

11:10 am - 11:19 pmONT Ontario-GRB Green Bay Austin-Straubel

10h 09m2 stops San Francisco Chicago O'Hare Intl

$951United Airlines

Mon, Sep 21 - Fri, Sep 25

3:42 pm - 10:59 pmGRB Green Bay Austin-Straubel-ONT Ontario

9h 17m1 stop Chicago O'Hare Intl

5:00 am - 7:51 pmONT Ontario-GRB Green Bay Austin-Straubel

12h 51m2 stops Denver Intl Chicago O'Hare Intl

$1,131United Airlines

Tue, Sep 22 - Wed, Sep 23

6:25 am - 12:50 pmGRB Green Bay Austin-Straubel-ONT Ontario

8h 25m2 stops Chicago O'Hare Intl Denver Intl

5:00 am - 7:51 pmONT Ontario-GRB Green Bay Austin-Straubel

12h 51m2 stops Denver Intl Chicago O'Hare Intl

$1,136United Airlines

Tue, Sep 22 - Wed, Sep 23

1:17 pm - 10:51 pmGRB Green Bay Austin-Straubel-ONT Ontario

11h 34m2 stops Chicago O'Hare Intl San Francisco

9:01 am - 11:19 pmONT Ontario-GRB Green Bay Austin-Straubel

12h 18m2 stops San Francisco Chicago O'Hare Intl

$1,260United Airlines

Mon, Sep 21 - Wed, Sep 23

5:05 pm - 10:59 pmGRB Green Bay Austin-Straubel-ONT Ontario

7h 54m1 stop Chicago O'Hare Intl

9:01 am - 11:19 pmONT Ontario-GRB Green Bay Austin-Straubel

12h 18m2 stops San Francisco Chicago O'Hare Intl

$1,334United Airlines

Mon, Sep 21 - Wed, Sep 23

1:17 pm - 10:51 pmGRB Green Bay Austin-Straubel-ONT Ontario

11h 34m2 stops Chicago O'Hare Intl San Francisco

9:01 am - 9:04 pmONT Ontario-GRB Green Bay Austin-Straubel

10h 03m2 stops San Francisco Chicago O'Hare Intl

$1,339United Airlines

Sun, Sep 20 - Wed, Sep 23

5:30 am - 11:05 amGRB Green Bay Austin-Straubel-ONT Ontario

7h 35m1 stop Atlanta Hartsfield-Jackson

12:19 pm - 10:24 pmONT Ontario-GRB Green Bay Austin-Straubel

8h 05m1 stop Atlanta Hartsfield-Jackson

$1,939Delta

Tue, Sep 22 - Wed, Sep 23

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United Airlines flights from Green Bay to Ontario

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

United Airlines

Oct 10

GRB3:45 pmGreen Bay Austin-Straubel

9h 04m

1 stop

ONT10:49 pmOntario

Oct 31

ONT9:25 amOntario

11h 18m

2 stops

GRB10:43 pmGreen Bay Austin-Straubel

$411

United Airlines

Oct 10

GRB1:17 pmGreen Bay Austin-Straubel

11h 34m

2 stops

ONT10:51 pmOntario

Oct 24

ONT7:00 amOntario

7h 54m

1 stop

GRB4:54 pmGreen Bay Austin-Straubel

$481

United Airlines

Nov 14

GRB1:58 pmGreen Bay Austin-Straubel

6h 49m

1 stop

ONT6:47 pmOntario

Nov 17

ONT5:00 amOntario

12h 10m

2 stops

GRB7:10 pmGreen Bay Austin-Straubel

$484

Delta flights from Green Bay to Ontario

Our best Delta deals on Green Bay to Ontario flight tickets

Delta

Oct 26

GRB5:30 amGreen Bay Austin-Straubel

7h 36m

1 stop

ONT11:06 amOntario

Oct 31

ONT12:16 pmOntario

8h 01m

1 stop

GRB10:17 pmGreen Bay Austin-Straubel

$379

Delta

Oct 24

GRB5:30 amGreen Bay Austin-Straubel

7h 36m

1 stop

ONT11:06 amOntario

Oct 30

ONT12:16 pmOntario

8h 11m

1 stop

GRB10:27 pmGreen Bay Austin-Straubel

$406

Delta

Nov 3

GRB5:30 amGreen Bay Austin-Straubel

7h 36m

1 stop

ONT11:06 amOntario

Nov 7

ONT12:16 pmOntario

8h 01m

1 stop

GRB10:17 pmGreen Bay Austin-Straubel

$468

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Green BayOntario

GRB Green Bay Austin-Straubel - ONT Ontario

GRBONT

Green Bay Austin-Straubel

Wed 10/28

1:05 pm-8:25 pm

1 stop9h 20m

Ontario

Sat 10/31

12:16 pm-10:17 pm

1 stop8h 01m

$379

Quickest round-trip

Green BayOntario

GRB Green Bay Austin-Straubel - ONT Ontario

GRBONT

Green Bay Austin-Straubel

Tue 10/27

5:30 am-11:06 am

1 stop7h 36m

Ontario

Sat 10/31

12:16 pm-10:17 pm

1 stop8h 01m

$379

Green BayOntario

GRB Green Bay Austin-Straubel - ONT Ontario

GRBONT

Green Bay Austin-Straubel

Thu 10/29

5:30 am-11:06 am

1 stop7h 36m

Ontario

Sat 10/31

12:16 pm-10:17 pm

1 stop8h 01m

$379

Green BayOntario

GRB Green Bay Austin-Straubel - ONT Ontario

GRBONT

Green Bay Austin-Straubel

Mon 10/26

5:30 am-11:06 am

1 stop7h 36m

Ontario

Sat 10/31

12:16 pm-10:17 pm

1 stop8h 01m

$379

Green BayOntario

GRB Green Bay Austin-Straubel - ONT Ontario

GRBONT

Green Bay Austin-Straubel

Sat 10/10

3:45 pm-10:49 pm

1 stop9h 04m

Ontario

Sat 10/31

6:59 am-4:52 pm

1 stop7h 53m

$406

Green BayOntario

GRB Green Bay Austin-Straubel - ONT Ontario

GRBONT

Green Bay Austin-Straubel

Sat 10/10

3:45 pm-10:49 pm

1 stop9h 04m

Ontario

Sat 10/31

9:25 am-10:43 pm

2 stops11h 18m

$411

Green BayOntario

GRB Green Bay Austin-Straubel - ONT Ontario

GRBONT

Green Bay Austin-Straubel

Sat 10/10

6:00 am-3:16 pm

2 stops11h 16m

Ontario

Sat 10/31

6:15 am-6:17 pm

2 stops10h 02m

$466

Green BayOntario

GRB Green Bay Austin-Straubel - ONT Ontario

GRBONT

Green Bay Austin-Straubel

Wed 11/18

10:02 am-9:55 pm

2 stops13h 53m

Ontario

Sun 11/22

7:45 pm-9:32 am

2 stops11h 47m

$470

Green BayOntario

GRB Green Bay Austin-Straubel - ONT Ontario

GRBONT

Green Bay Austin-Straubel

Sat 10/10

1:17 pm-10:51 pm

2 stops11h 34m

Ontario

Sat 10/24

7:00 am-4:54 pm

1 stop7h 54m

$481

Green BayOntario

GRB Green Bay Austin-Straubel - ONT Ontario

GRBONT

Green Bay Austin-Straubel

Wed 2/24

2:46 pm-8:48 pm

1 stop8h 02m

Ontario

Mon 3/1

7:50 pm-9:22 am

2 stops11h 32m

$484

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 26% 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	$292
Fastest flight time	6h 49m
Direct flights	None

The best one-way flight to Ontario from Green Bay in the past 72 hours is $292. The best round-trip flight deal from Green Bay to Ontario found on momondo in the last 72 hours is $379.

The fastest flight from Green Bay to Ontario takes 6h 49m

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 6h 49m 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 2 as of September 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 52% of all bookings. The subsequent popular airline is United Airlines at 48%.

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 10,232 reviews		Search United Airlines flights
Delta	PriceFrom $360	Free Cancellation	Rating 7.8 8,589 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 $292

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 12/15. 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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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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List of cabin classes available on flights landing in Los Angeles. Availability may vary depending on flight origin and airline.

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