ONT - GRB

$270 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 11/12. 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

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
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Everything you should know

Cheapest round-trip
$314
United Airlines
Thu 11/13Thu 11/20
ONT - GRB • 1 stop
Cheapest one-way
$270
United Airlines
Wed 11/12
ONT - GRB • 2 stops
Top airlines
United Airlines
Cheapest • from $314 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
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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, Nov 13 - Thu, Nov 20
United Airlines Logo
7:00 am - 4:46 pmONT-GRB
7h 46m1 stop
United Airlines Logo
3:51 pm - 10:31 pmGRB-ONT
8h 40m1 stop
$314United Airlines
Find Deal
Thu, Nov 13 - Thu, Nov 20
American Airlines Logo
7:30 pm - 9:15 amONT-GRB
11h 45m2 stops
American Airlines Logo
5:55 am - 4:01 pmGRB-ONT
12h 06m2 stops
$324American Airlines
Find Deal
Thu, Nov 13 - Thu, Nov 20
United Airlines Logo
7:00 am - 4:46 pmONT-GRB
7h 46m1 stop
United Airlines Logo
6:15 am - 12:33 pmGRB-ONT
8h 18m2 stops
$386United Airlines
Find Deal
Tue, Nov 4 - Mon, Nov 10
United Airlines Logo
7:00 am - 4:46 pmONT-GRB
7h 46m1 stop
United Airlines Logo
1:20 pm - 6:36 pmGRB-ONT
7h 16m1 stop
$404United Airlines
Find Deal
Tue, Apr 14 - Sat, Apr 18
Delta Logo
12:00 pm - 9:58 pmONT-GRB
7h 58m1 stop
Delta Logo
5:30 am - 11:20 amGRB-ONT
7h 50m1 stop
$429Delta
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Tue, Apr 14 - Sat, Apr 18
Delta Logo
12:00 pm - 9:58 pmONT-GRB
7h 58m1 stop
Delta Logo
4:00 pm - 11:44 pmGRB-ONT
9h 44m2 stops
$434Delta
Find Deal
Fri, Dec 5 - Fri, Dec 12
Delta Logo
12:12 pm - 10:37 pmONT-GRB
8h 25m1 stop
Delta Logo
4:17 pm - 11:58 pmGRB-ONT
9h 41m2 stops
$449Delta
Find Deal
Fri, Dec 5 - Fri, Dec 12
Delta Logo
10:25 pm - 11:33 amONT-GRB
11h 08m2 stops
Delta Logo
4:52 pm - 11:58 pmGRB-ONT
9h 06m2 stops
$454Delta
Find Deal
Tue, Nov 25 - Thu, Nov 27
United Airlines Logo
7:00 am - 4:46 pmONT-GRB
7h 46m1 stop
United Airlines Logo
8:00 am - 3:21 pmGRB-ONT
9h 21m1 stop
$457United Airlines
Find Deal
Tue, Apr 14 - Sat, Apr 18
American Airlines Logo
8:05 pm - 10:45 amONT-GRB
12h 40m2 stops
American Airlines Logo
6:20 am - 1:33 pmGRB-ONT
9h 13m2 stops
$467American Airlines
Find Deal
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.

What’s the cheapest day of the week to fly from Ontario to Green Bay?

The average price of all round-trip flights from Ontario to Green Bay clicked on KAYAK for each day over the last 12 months.

If your flying dates are flexible, you should consider flying to Green Bay on a Tuesday, as we generally find the cheapest rates on that day for this route. On the other hand, Sunday is the most expensive day to fly from Ontario to Green Bay. For your return ticket, we recommend flying on a Thursday and avoiding Fridays for the best deals.

Good to know

Low seasonNovember
Cheapest flight$270
Best time to beat the crowds with an average 35% drop in price.
Most popular time to fly with an average 70% increase in price.
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 $270 for a one-way ticket and $314 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?

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

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

    The two airlines most popular with KAYAK users for flights from Ontario to Green Bay are Delta and United Airlines. With an average price for the route of $464 and an overall rating of 7.9, Delta is the most popular choice. United Airlines is also a great choice for the route, with an average price of $608 and an overall rating of 7.4.

  • 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 3 airlines serving 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.
7.9
DeltaOverall score based on 7984 reviews
7.9Comfort
8.5Crew
7.9Entertainment
8.2Boarding
7.3Food
Airline reviews

Delayed flight (1hour) plus a long layover after an overnight flight with no backup plane available.

6.0 GoodFernando, Oct 2025SAN - ATL
Read more Delta reviews

Delayed flight (1hour) plus a long layover after an overnight flight with no backup plane available.

Flight delayed for two and half hours and then canceled altogether due to mechanical issues. No mechanic onsite to fix so had to send one from LAX.

My husband upgraded our seats and I don't know if it was due to the type of planet was or if they didn't upgrade our seats. We were supposed to be in I believe comfort seats and they were just as tight as any other seat- no leg room and we are very tall people but at least it wasn't extremely cold. My husband did put in a complaint about our seating because he paid extra and if we would have known that the space and the tightness would have been the same, we just would have gotten the emergency row emergency row seats that we normally get. We love Delta but both our flights coming home we're not good. Oh I forgot to mention that on our flight to Hawaii our luggage wheels got broke and we had to purse new luggage on vacation then we never had this problem so we didn't know protocol and reported it after we got home only for them to tell is we only had 24hrs to report the damage. Not sure what was going on with Delta this vacation trip.

Crew was excellent. Comfort seats not as nice as other kinds of planes.

It was a great flight and the stewards and stewardess were all kind and accommodating!! The seats were comfortable and entertainment screen excellent!

There are 4 flights in consecutive gates with about the same departure time. Two flights were boarding at the same time. One was delayed or boarding would be happening at the same time. I am not sure what Delta and LAX need to do to have a better layout at the end of Terminal 2

There was a security issue at the airport and we were unable to land. We circled endlessly and then landed at another airfield for fuel. We then circled the airport again, almost landed but didn’t fully touch down before circling again. I am thankful to the crew for keeping us safe- the issue was the airline and staff at the airport getting us seats on our connecting flights. That part was hours of searching for someone and getting in double my steps.

Most aspects were good however if they assign boarding zones they ought to enforce them or why bother? My luggage from SAN-JFK-MAD was lost in NY so I without my main bag for two days upon arrival in Spain. They were helpful in tracking it and eventually delivered it to my hotel. The flub was because of a delay upon arrival in NYC. I had booked 2 1/2 hours between flights but we had to hold on the taxiway for an hour after landing while waiting for a clear gate which likely caused the baggage error.

Excellent flight, the planes were newer, they did a nice job with boarding, great service overall.

It would be nice if was given wires ear buds. Overall was a good experience was able to sleep on the plane

I was in first class. The outlets at my seat did not work. The plane was shabby and run down. I had prepurchsed a day subscription for internet that was not redeemable. I had to repurchase the internet for my flight and then it didn’t work anyway. Quite disappointed in what was supposed to be the launch of a great vacation.

I understand stuff happens, but plane failures are likely due to lack of maintenance. Additionally, air conditioning wasn't working, no snack/drink service, no WiFi. Fortunately, the crew was communicative and light-hearted. United grabbed another plane and we were able to get to our destination.

Stuck on tarmac for two hours plus a 5.5 hour flight. Rude flight attendant. And no meals, not even for purchase!

I learned that seating towards the end of plane that a line forms for the restroom and people use your chair as a hand railing, bumping your seat consistently. I was seated in the aisle. I think that next time if I am towards the back row I would want to sit in the middle or window seat.

United sent me a mileage plus number last year but that number is invalid so I can’t use it to check into flights or collect mileage. There is human to speak about the problem, only computers who keep asking me if I am using the correct email. It’s so frustrating and I cannot resolve it.

Not a great experience. We paid for the upgrade for premium economy seats and seated ourselves in very comfortable seats. Someone came along with the same seat on their boarding pass. The aircraft had been changed and as a result we were booted out and sent further back to small uncomfortable seats. After complaining we were moved to emergency row seats, which gave us more leg room but the seats don’t recline. For people in our 70’s we found having to sit upright from California to NJ very uncomfortable. Not sure why they chose to move senior citizens instead of the two people that were allowed to take the more comfortable seats. Not happy.

Everything was great. Only thing that could’ve made it better was buy on board options for hot food, but the snacks were decent. The flight attendants were great. I had no complaints. I was able to make it to my destination safely

Boarded plane and then delayed 1.5 hours while on the plane

Horrific. They missed my connecting flight to San Diego. I didn’t get there until Monday at 9am when I had a mandatory court settlement conference scheduled at 6am since we had parties on the east coast. This caused many issues. All because United apparently forgot to hold the doors open until my flight landed that only had a 10 minute delay. This was the last flight to Southern California. So I couldn’t even rent a car to finish the trip. United cannot be trusted when traveling on specific days and times since weather didn’t have anything to do with the delays.

Really good 😊 the woman at the gate entrance was a little rude checking in our carry-on but i dont think she worked for the airline, she worked for the airport at sacramento, other than that amazing.

Always seated jammed in rear of aircraft Admirals Club food at DFW terminal D was absolute worst food experience and I pay $600/year to eat this dried out junk

Mostly good. Flight was crowded but Airline personnel were very friendly & accommodating. It would be good to have savory snacks rather than just sweet Biscoff cookies.

It was a red eye flight, so no meals were provided, but it was fine with snacks. The seats felt cramped and almost too narrow.

Very crowded flight but what can you expect these days?? Crew was accommodating.

The seats in economy were appeared to be quite thin and lack sufficient cushioning to be comfortable. Perhaps it was my seating position but the plane seemed notably load.

American airlines suck they delay the flights all the time made me sleep in an airport because my flight was delayed and I miss my connecting flight

The entertainment package was vast and the selections were very current. Keep updating it was great.

The seat was so hard my tailbone was aching The crew was kind of a b**** because I made a joke that I didn't care if they close the door I total c*** when she was trying to f****** act like she was mad at me because I said that The flight was bumpy. Sure you didnt have control over that.

4 hours late, including over +1 hour waiting in plane to take off. Baggage left behind too.

While waiting to claim my checked luggage, I discovered the airline had lost it. After a long wait and inquiries, I discovered it was on another flight. Fortunately, the airline finally sent my luggage home.

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

Information on your arrival and departure airports

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