ONT - GRB

$219 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 4/25. 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 23% 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
$359
American Airlines
sáb. 4/25sáb. 5/16
ONT - GRB • 2 stops
Cheapest one-way
$219
Delta
sáb. 4/25
ONT - GRB • 1 stop
Top airlines
American Airlines
Cheapest • from $359 (round-trip)
United Airlines
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
Denver (DEN)
Cheapest • Avg $218 (round-trip)
Minneapolis (MSP)
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

sáb., abr. 25 - sáb., may. 16
American Airlines Logo
10:54 am - 9:58 pm
ONT
-
GRB
9h 04m
2 stops
American Airlines Logo
9:42 am - 7:34 pm
GRB
-
ONT
11h 52m
2 stops
$359American Airlines
sáb., abr. 25 - sáb., may. 16
American Airlines Logo
10:54 am - 11:31 pm
ONT
-
GRB
10h 37m
2 stops
American Airlines Logo
9:42 am - 7:34 pm
GRB
-
ONT
11h 52m
2 stops
$367American Airlines
jue., abr. 30 - sáb., may. 9
Delta Logo
12:49 pm - 11:01 pm
ONT
-
GRB
8h 12m
1 stop
Delta Logo
11:11 am - 9:48 pm
GRB
-
ONT
12h 37m
2 stops
$368Delta
sáb., abr. 25 - sáb., may. 16
Delta Logo
12:49 pm - 11:01 pm
ONT
-
GRB
8h 12m
1 stop
Delta Logo
6:20 am - 12:19 pm
GRB
-
ONT
7h 59m
2 stops
$393Delta
mié., sep. 2 - dom., sep. 6
Delta Logo
12:00 pm - 9:58 pm
ONT
-
GRB
7h 58m
1 stop
Delta Logo
5:30 am - 4:14 pm
GRB
-
ONT
12h 44m
2 stops
$398Delta
sáb., abr. 25 - sáb., may. 16
Delta Logo
12:49 pm - 11:01 pm
ONT
-
GRB
8h 12m
1 stop
Delta Logo
6:20 am - 12:19 pm
GRB
-
ONT
7h 59m
2 stops
$422Delta
jue., abr. 30 - sáb., may. 9
Delta Logo
12:49 pm - 11:01 pm
ONT
-
GRB
8h 12m
1 stop
Delta Logo
11:06 am - 9:48 pm
GRB
-
ONT
12h 42m
2 stops
$423Delta
mié., abr. 1 - dom., abr. 5
United Airlines Logo
6:49 pm - 10:00 am
ONT
-
GRB
13h 11m
2 stops
United Airlines Logo
2:48 pm - 10:31 pm
GRB
-
ONT
9h 43m
1 stop
$424United Airlines
vie., mar. 27 - mar., mar. 31
United Airlines Logo
11:59 pm - 9:59 am
ONT
-
GRB
8h 00m
1 stop
United Airlines Logo
10:40 am - 9:50 pm
GRB
-
ONT
13h 10m
2 stops
$428United Airlines
jue., sep. 3 - dom., sep. 6
Delta Logo
12:00 pm - 9:58 pm
ONT
-
GRB
7h 58m
1 stop
Delta Logo
5:30 am - 11:04 am
GRB
-
ONT
7h 34m
1 stop
$434Delta
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 American Airlines ($359) and Delta ($368).

Find deals

Good to know

Cheapest flight$219
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 $219 for a one-way ticket and $359 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 $526 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 9431 reviews
8.1Crew
7.1Entertainment
7.7Boarding
6.6Food
7.3Comfort
Airline reviews

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

6.0 GoodJamie, Mar 2026
LAX - EWR
Read more United Airlines reviews

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.

Staff were good. My seat was in need of repair, but for a short flight was not problematic. Usual basic snack and drink setup that you'll find on any US carrier. Over, a decent, basic flight.

Complimentary light meal would be appreciated. But great flight crew service on all legs

Flight delayed for more than 16 hrs and no effort was spent to provide an alternate

Women boarding passengers at the gate was absolutely rude and disrespectful of passengers. The flight attendant was absolutely delightful! Smiling and connected with the passengers. So happy. The seats are cramped and uncomfortable but I guess that’s just the way it is Communication regarding flight was excellent

it was a very short flight so my expectations were low.

Very disappointing given gate agent behavior. Filed a formal complaint with United.

Crew was great (professional, attentive, prompt). Snacks for 4 hrs flight is deplorable.

Flight delayed. WiFi connectivity very poor if not existant. Last minute arrival forced me to run to catch my connection.

Delay after delay with little communication then AA lost my luggage and at airport would not assist just said scan this QR code to track your luggage and submit a claim. However QR code provided did not work so have to go back to airport

Dloght delayed by 2.5 hrs . Common theme in my last four american floghts

They are rarely on time! Very hard to plan your travels when flights or connections keep getting delayed.

My seat was assigned last row behind restrooms No legroom’s I’m very Pettit Still was not comfortable Food choice was excellent

The chicken wrap was tiny ($13 for what looked like a 1/3 of a normal wrap?) and disgusting.

Mediocre would be best description. Food bland. Seat biz class uncomfortable to sleep. Crew never dimmed lights completely in an overnight flight to Europe. Would avoid AA if possible.

Small plane, poor meal choices for first class, bad terminal and boarding experience at LAX

Massimo, flight attendant was very authentic, attentive - wonderful. Food/wrap was just okay.

Never ontime and always delays. Long waits for customer service and often app doesn’t work

Experience was great. The best part is the free Wi-Fi connection which helps me to work on the flight

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

Information on your arrival and departure airports

Ontario (ONT)
Green Bay (GRB)