$267+ Cheap flights from Ontario to Green Bay (ONT - GRB)
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/27. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — GRB
Jul 17 — Jul 241
Round-trip
1 adult, Economy
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Find cheap flights from Ontario to Green Bay with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Ontario to Green Bay
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Best
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One-way
Cheapest flights from Ontario to Green BayExplore the most affordable flight options available from Ontario to Green Bay. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 17, 2026.
Explore the most affordable flight options available from Ontario to Green Bay. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 17, 2026.
This Delta deal was found by Cheapflights users on 6/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/2411:59 am
ONT
- GRB
1 stop8h 30m
Delta
Tue 10/65:30 am
GRB
- ONT
1 stop7h 57m
Delta
Deal found 6/13![Delta logo]()
$349
This American Airlines deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/247:11 pm
ONT
- GRB
2 stops12h 24m
American Airlines
Tue 10/68:10 pm
GRB
- ONT
2 stops14h 20m
American Airlines
Deal found 6/16![American Airlines logo]()
$389
This Delta deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/411:50 am
ONT
- GRB
1 stop9h 01m
Delta
Thu 7/95:10 am
GRB
- ONT
1 stop7h 28m
Delta
Deal found 6/14![Delta logo]()
$431
This United Airlines deal was found by Cheapflights users on 6/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/2911:00 am
ONT
- GRB
2 stops10h 19m
United Airlines
Tue 9/15:29 pm
GRB
- ONT
1 stop7h 06m
United Airlines
Deal found 6/13![United Airlines logo]()
$454
This American Airlines deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/1412:59 pm
ONT
- GRB
2 stops9h 17m
American Airlines
Tue 8/186:55 pm
GRB
- ONT
2 stops19h 08m
American Airlines
Deal found 6/16![American Airlines logo]()
$470
This American Airlines deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1010:29 am
ONT
- GRB
2 stops10h 41m
American Airlines
Tue 10/208:10 pm
GRB
- ONT
2 stops14h 20m
American Airlines
Deal found 6/16![American Airlines logo]()
$484
This Delta deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/1312:00 pm
ONT
- GRB
1 stop8h 06m
Delta
Tue 8/185:24 am
GRB
- ONT
1 stop7h 18m
Delta
Deal found 6/12![Delta logo]()
$493
This Delta deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/1410:00 pm
ONT
- GRB
2 stops10h 27m
Delta
Tue 8/185:24 am
GRB
- ONT
1 stop7h 18m
Delta
Deal found 6/16![Delta logo]()
$498
Best flights from Ontario to Green BayDiscover carefully curated flight deals from Ontario to Green Bay that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 17, 2026.
Discover carefully curated flight deals from Ontario to Green Bay that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 17, 2026.
This Delta deal was found by Cheapflights users on 6/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/2411:59 am
ONT
- GRB
1 stop8h 30m
Delta
Tue 10/612:30 pm
GRB
- ONT
2 stops11h 44m
Delta
Deal found 6/15![Delta logo]()
$409
This United Airlines deal was found by Cheapflights users on 6/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/2911:00 am
ONT
- GRB
2 stops10h 19m
United Airlines
Tue 9/15:29 pm
GRB
- ONT
1 stop7h 06m
United Airlines
Deal found 6/13![United Airlines logo]()
$454
This Delta deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/1312:00 pm
ONT
- GRB
1 stop8h 06m
Delta
Tue 8/185:24 am
GRB
- ONT
1 stop7h 18m
Delta
Deal found 6/12![Delta logo]()
$493
This United Airlines deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/275:00 am
ONT
- GRB
2 stops17h 19m
United Airlines
Sat 10/313:44 pm
GRB
- ONT
1 stop8h 42m
United Airlines
Deal found 6/16![United Airlines logo]()
$513
This Delta deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/1412:00 pm
ONT
- GRB
1 stop8h 06m
Delta
Tue 8/185:24 am
GRB
- ONT
1 stop7h 18m
Delta
Deal found 6/16![Delta logo]()
$493
Last-minute flights from Ontario to Green BayDiscover last-minute flight deals from Ontario to Green Bay. Data last updated June 17, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Green Bay. Data last updated June 17, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 6/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/206:05 am
ONT
- GRB
1 stop7h 01m
United Airlines
Wed 6/2412:34 pm
GRB
- ONT
2 stops12h 03m
United Airlines
Deal found 6/15![United Airlines logo]()
$645
This United Airlines deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/36:10 am
ONT
- GRB
1 stop8h 41m
United Airlines
Thu 7/93:44 pm
GRB
- ONT
1 stop9h 07m
United Airlines
Deal found 6/14![United Airlines logo]()
$624
This Delta deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/411:50 am
ONT
- GRB
1 stop9h 01m
Delta
Thu 7/95:10 am
GRB
- ONT
1 stop7h 28m
Delta
Deal found 6/14![Delta logo]()
$431
This Delta deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/411:50 am
ONT
- GRB
1 stop9h 01m
Delta
Tue 7/75:10 am
GRB
- ONT
1 stop7h 28m
Delta
Deal found 6/14![Delta logo]()
$541
This Delta deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/411:50 am
ONT
- GRB
1 stop9h 01m
Delta
Fri 7/105:10 am
GRB
- ONT
1 stop7h 28m
Delta
Deal found 6/14![Delta logo]()
$599
This Delta deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/411:50 am
ONT
- GRB
1 stop9h 01m
Delta
Sun 7/56:15 am
GRB
- ONT
2 stops7h 55m
Delta
Deal found 6/14![Delta logo]()
$604
This Delta deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/1112:00 pm
ONT
- GRB
1 stop8h 48m
Delta
Wed 7/155:10 am
GRB
- ONT
1 stop7h 28m
Delta
Deal found 6/14![Delta logo]()
$569
This United Airlines deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/116:10 am
ONT
- GRB
1 stop8h 41m
United Airlines
Thu 7/163:44 pm
GRB
- ONT
1 stop9h 07m
United Airlines
Deal found 6/14![United Airlines logo]()
$619
This United Airlines deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/116:10 am
ONT
- GRB
1 stop6h 59m
United Airlines
Sun 7/129:00 am
GRB
- ONT
1 stop15h 51m
United Airlines
Deal found 6/14![United Airlines logo]()
$647
This American Airlines deal was found by Cheapflights users on 6/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/207:15 pm
ONT
- GRB
2 stops12h 06m
American Airlines
Tue 7/281:01 pm
GRB
- ONT
2 stops11h 33m
American Airlines
Deal found 6/13![American Airlines logo]()
$555
This American Airlines deal was found by Cheapflights users on 6/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/207:15 pm
ONT
- GRB
2 stops12h 06m
American Airlines
Wed 7/291:01 pm
GRB
- ONT
2 stops11h 33m
American Airlines
Deal found 6/13![American Airlines logo]()
$583
One-way flights from Ontario to Green BaySearch for one-way flight options from Ontario to Green Bay. Find affordable one-way fares based on user searches. Data last updated June 17, 2026.
Search for one-way flight options from Ontario to Green Bay. Find affordable one-way fares based on user searches. Data last updated June 17, 2026.
This American Airlines deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2712:59 pm
ONT
- GRB
2 stops9h 17m
American Airlines
Deal found 6/14![American Airlines logo]()
$267
This Delta deal was found by Cheapflights users on 6/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/1312:00 pm
ONT
- GRB
1 stop7h 58m
Delta
Deal found 6/15![Delta logo]()
$299
This United Airlines deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/46:10 am
ONT
- GRB
1 stop8h 41m
United Airlines
Deal found 6/16![United Airlines logo]()
$308
This Delta deal was found by Cheapflights users on 6/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/1112:00 pm
ONT
- GRB
1 stop8h 48m
Delta
Deal found 6/17![Delta logo]()
$329
This United Airlines deal was found by Cheapflights users on 6/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/117:00 am
ONT
- GRB
1 stop6h 43m
United Airlines
Deal found 6/17![United Airlines logo]()
$349
This United Airlines deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/225:00 am
ONT
- GRB
2 stops9h 43m
United Airlines
Deal found 6/16![United Airlines logo]()
$354
This United Airlines deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/306:10 am
ONT
- GRB
1 stop8h 41m
United Airlines
Deal found 6/16![United Airlines logo]()
$357
This United Airlines deal was found by Cheapflights users on 6/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/36:10 am
ONT
- GRB
1 stop8h 41m
United Airlines
Deal found 6/15![United Airlines logo]()
$400
Find flight deals from Ontario to Green Bay
Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Green Bay (GRB). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated June 17, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $349 (Delta) |
One-way from | $267 (American Airlines) |
Popular in | March |
Cheapest in | January |
Average price | $451 |
Cheapflights Fare Finder
Customize your flight search to find flights from Ontario to Green Bay that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 17, 2026.
Use the filters below to find and compare flights from Ontario to Green Bay that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
OntarioGreen Bay
ONT - GRB
ONTGRB
Ontario
Thu 9/24
11:59 am-10:29 pm
1 stop8h 30m
Green Bay Austin-Straubel
Tue 10/6
12:30 pm-10:14 pm
2 stops11h 44m
$409
OntarioGreen Bay
ONT - GRB
ONTGRB
Ontario
Sat 8/29
11:00 am-11:19 pm
2 stops10h 19m
Green Bay Austin-Straubel
Tue 9/1
5:29 pm-10:35 pm
1 stop7h 06m
$454
Quickest round-trip
OntarioGreen Bay
ONT - GRB
ONTGRB
Ontario
Thu 8/13
12:00 pm-10:06 pm
1 stop8h 06m
Green Bay Austin-Straubel
Tue 8/18
5:24 am-10:42 am
1 stop7h 18m
$493
OntarioGreen Bay
ONT - GRB
ONTGRB
Ontario
Fri 8/14
12:00 pm-10:06 pm
1 stop8h 06m
Green Bay Austin-Straubel
Tue 8/18
5:24 am-10:42 am
1 stop7h 18m
$493
OntarioGreen Bay
ONT - GRB
ONTGRB
Ontario
Tue 10/27
5:00 am-12:19 am
2 stops17h 19m
Green Bay Austin-Straubel
Sat 10/31
3:44 pm-10:26 pm
1 stop8h 42m
$513
Cheapest one-way
OntarioGreen Bay
ONT - GRB
ONTGRB
Ontario
Sun 9/13
12:00 pm-9:58 pm
1 stop7h 58m
$299
OntarioGreen Bay
ONT - GRB
ONTGRB
Ontario
Sat 7/11
12:00 pm-10:48 pm
1 stop8h 48m
$329
OntarioGreen Bay
ONT - GRB
ONTGRB
Ontario
Sun 9/13
7:11 pm-9:35 am
2 stops12h 24m
$334
Quickest one-way
OntarioGreen Bay
ONT - GRB
ONTGRB
Ontario
Fri 9/11
7:00 am-3:43 pm
1 stop6h 43m
$349
OntarioGreen Bay
ONT - GRB
ONTGRB
Ontario
Sun 11/22
5:00 am-4:43 pm
2 stops9h 43m
$354
Showing 1-10 of 13 resultsSorted by cheapest first
Compare providers for flights from Ontario to Green Bay
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Green Bay in June.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Ontario-Green Bay flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Green Bay flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-Green Bay flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Ontario-Green Bay flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Green Bay flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from Ontario to Green Bay
Have a flexible travel schedule? Discover the best time to fly to Green Bay from Ontario with our price prediction graph.
ONT-GRB
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Reviews of airlines servicing Green Bay
Get insights into the airlines that provide service to Green Bay. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Green Bay. Reviews last updated June 17, 2026.
Peruse reviews from past customers who have flown with United Airlines from Ontario to Green Bay to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Comfort
7.3
Crew
8.1
Food
6.6
Overall
7.4
Entertainment
7.1
Boarding
7.7
Reviews
1 / 20
4.0
OkayDynasty,May 2026
LAX - EWR
Comfort
7.3
Crew
8.1
Food
6.6
Overall
7.4
Entertainment
7.1
Boarding
7.7
Reviews
1 / 20
4.0
OkayDynasty,May 2026
LAX - EWR
Related info for your journey
Find useful and relevant information for your journey from Ontario to Green Bay. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Browse thousands of different options on Cheapflights for your next trip
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Alternative routes for Ontario to Green Bay
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Complete your trip
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Other flights to Green Bay
Explore flights to Green Bay departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on June 17, 2026.
Ontario and Green Bay flights
Browse other Ontario and Green Bay flight options. Last updated on June 17, 2026.
Other flights from Ontario
Browse through other flights departing from Ontario. Flights are based on user searches made on Cheapflights and were last updated on June 17, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top airline flying from Ontario to Green Bay
Discover the top airline that operate flights from Ontario to Green Bay. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 17, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$344 | Average$518 | FlexibilityNo cancel fee | On-time69% |