ONT - GRB

$254 Find Cheap Flights from Ontario to Green Bay

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Ontario to Green Bay departing on 5/26. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Green Bay

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Green Bay, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Green Bay, as well as popular online travel agencies
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 24% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Everything you should know

Cheapest round-trip
$347
Delta
Thu 9/24Tue 10/6
ONT - GRB • 1 stop
Cheapest one-way
$254
Delta
Tue 5/26
ONT - GRB • 1 stop
Top airlines
Cheapest • from $347 (round-trip)
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Ontario and Green Bay. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $218 (round-trip)
Shortest trip • 5h 44m (one-way)
Insights
Insights
Insights
Insights
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Green Bay!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Ontario to Green Bay (ONT-GRB)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ontario to Green Bay that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Ontario to Green Bay

Thu, Sep 24 - Tue, Oct 6
Delta Logo
12:00 pm - 9:58 pm
ONT
-
GRB
7h 58m
1 stop
Delta Logo
7:00 am - 6:18 pm
GRB
-
ONT
13h 18m
2 stops
$347Delta
Thu, Sep 24 - Tue, Oct 6
Delta Logo
10:59 pm - 10:22 am
ONT
-
GRB
9h 23m
2 stops
Delta Logo
7:00 am - 6:18 pm
GRB
-
ONT
13h 18m
2 stops
$352Delta
Fri, May 29 - Fri, Jun 5
Delta Logo
10:00 pm - 11:13 am
ONT
-
GRB
11h 13m
2 stops
Delta Logo
5:20 am - 10:57 am
GRB
-
ONT
7h 37m
1 stop
$354Delta
Thu, Sep 24 - Tue, Oct 6
Delta Logo
12:00 pm - 9:58 pm
ONT
-
GRB
7h 58m
1 stop
Delta Logo
5:30 am - 11:27 am
GRB
-
ONT
7h 57m
1 stop
$374Delta
Fri, May 29 - Fri, Jun 5
Delta Logo
12:07 pm - 10:52 pm
ONT
-
GRB
8h 45m
1 stop
Delta Logo
5:20 am - 10:57 am
GRB
-
ONT
7h 37m
1 stop
$384Delta
Fri, May 29 - Fri, Jun 5
American Airlines Logo
11:59 pm - 11:45 am
ONT
-
GRB
9h 46m
2 stops
American Airlines Logo
12:59 pm - 10:36 pm
GRB
-
ONT
11h 37m
2 stops
$385American Airlines
Fri, May 29 - Fri, Jun 5
Delta Logo
10:00 pm - 11:13 am
ONT
-
GRB
11h 13m
2 stops
Delta Logo
4:19 pm - 11:34 pm
GRB
-
ONT
9h 15m
2 stops
$394Delta
Thu, Sep 24 - Tue, Oct 6
Delta Logo
12:00 pm - 9:58 pm
ONT
-
GRB
7h 58m
1 stop
Delta Logo
5:30 am - 11:27 am
GRB
-
ONT
7h 57m
1 stop
$414Delta
Sun, May 24 - Sat, May 30
United Airlines Logo
6:30 am - 3:11 pm
ONT
-
GRB
6h 41m
1 stop
United Airlines Logo
3:46 pm - 10:51 pm
GRB
-
ONT
9h 05m
1 stop
$442United Airlines
Thu, Aug 13 - Sat, Sep 5
United Airlines Logo
7:13 pm - 9:59 am
ONT
-
GRB
12h 46m
2 stops
United Airlines Logo
10:34 am - 6:19 pm
GRB
-
ONT
9h 45m
1 stop
$447United Airlines
Booking Insights

KAYAK's insights & trends for Ontario to Green Bay flights

Get data-powered insights and trends into flights from Ontario to Green Bay to help you find the cheapest flights, the best time to fly and much more.

Which airlines provide the cheapest flights from Ontario to Green Bay?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from Ontario to Green Bay were found on Delta ($347) and American Airlines ($385).

Good to know

Cheapest flight$254
Flight from Ontario to Green Bay

When to book flights from Ontario to Green Bay

Are your dates flexible? Find out the best times to travel from Ontario to Green Bay based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Ontario to Green Bay

  • What is the cheapest flight from Ontario to Green Bay?

    In the last 3 days, the lowest price for a flight from Ontario to Green Bay was $254 for a one-way ticket and $347 for a round-trip.

  • Do I need a passport to fly between Ontario and Green Bay?

    No, a passport isn't needed to fly from Ontario to Green Bay. However, local authorities might ask for an official ID.

  • Which aircraft models fly most regularly from Ontario to Green Bay?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Ontario to Green Bay?

    oneworld, and Star Alliance are the airline alliances operating flights between Ontario and Green Bay, with oneworld being the most commonly used for this route.

  • Which is the best airline for flights from Ontario to Green Bay, United Airlines or American Airlines?

    The two airlines most popular with KAYAK users for flights from Ontario to Green Bay are United Airlines and American Airlines. With an average price for the route of $518 and an overall rating of 7.4, United Airlines is the most popular choice. American Airlines is also a great choice for the route, with an average price of $867 and an overall rating of 7.1.

  • How does KAYAK find such low prices on flights from Ontario to Green Bay?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Ontario to Green Bay.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Ontario to Green Bay?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Green Bay from Ontario is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Ontario to Green Bay?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Green Bay with an airline and back to Ontario with another airline. Booking your flights between Ontario and GRB can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Ontario to Green Bay?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Green Bay from Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airlines flying from Ontario to Green Bay

 
See real verified KAYAK customer reviews for airlines flying from Ontario to Green Bay. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Ontario to Green Bay? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
United AirlinesOverall score based on 9683 reviews
8.1Crew
6.6Food
7.1Entertainment
7.3Comfort
7.7Boarding
Airline reviews

Booked through Kayak Business, had a seat in middle and towards back due to booking rate, not comfortable.

4.0 OkayMichael, Apr 2026
SNA - DEN
Read more United Airlines reviews

Booked through Kayak Business, had a seat in middle and towards back due to booking rate, not comfortable.

Outstanding service, efficient & friendly crew, flight was safe, comfortable & on time

It was a red-eye, but the flight felt surprisingly quick. The seats were very comfortable, and that made resting much easier. I also want to thank the gentleman seated next to me, who graciously moved so my mom could sit beside me. We slept almost the entire way. The cabin crew was respectful in not disturbing us, while also being courteous and professional throughout. Thank you, United.

Boarding was again a "free for all". We were boarding group 4, and almost the entire plane was able to board before us. It's a shame that someone who follows the rules, gets the short end of the stick. Not fair.

It was perfect! I've never flown with United before, but I definitely will in the future

I had a cancelled flight because of technical issues going to my destination, and a delayed flight coming home. All told it wasn’t a total bust.

They delayed the flight from 9:00 to 11:55 At 11:45 they canceled the flight. I paid a premium price for the tickets with poor service

My flight was canceled a few hours before boarding. I was rebooked on Copa airlines and missed an important meeting .

OK, we were delayed and had to de plane and reboard.

Seats are uncomfortable. This has been a trend in the industry for decades. Trying to fit more seats on each plane to increase profits at the expense of the passenger.

not sure why you ask about food, I n3ver get food on flights except maybe cookies or pretzels. wifi was slow and in and out most of the flight not good.

Left early arrived early..right amount of talking from pilots..of course had to love the biscuit and water!

Boarding gate at LAX was too crowded—two gates next to one another

On time departure and early arrival. Flight attendant very nice.

The SFO Lounge crew were amazing. The bartender Faris was great. Thanks!

Was not able to do a online check-in because the American Airlines system doesn't store our visa or other passport information, allowing us to have a trouble-free check-in. We were forced to have to check-in at the counter which Changes are upgrade status given that we were not able to check in much earlier.

Good flight, seated and had a water within 5 minutes. Crew was hospitable.

there are no options s for snack besides cookies would ve nice to have a salty option n

We left at 1030 am pacific from LA and supposed to land at 7 pm Eastern in NY. They made a detour, stopped in Philadelphia and didn’t land till 1130 PM Eastern!!! Worst flight experience with no pilot communication with no explanation as to what was going on. Everyone was very frustrated to say the least.

Flight boarded from Gate 159B, the farthest gate in the LAX Bradley Terminal. While the flight operated on time, the first class cabin attendant made no recognition of my being an Advantage Executive Platinum member.

Everything you need to know for your flight from Ontario to Green Bay

Information on your arrival and departure airports