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Cheap flights from Green Bay to Ontario (GRB - ONT) from $178

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/16. 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.
GRB — ONT
May 12 — May 191
From?
To?
Sun 5/12
Sun 5/19
1 adult, Economy
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Cheap flight deals from Green Bay to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Green Bay (GRB) to Ontario (ONT). 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 May 7, 2024.

Popular in

March

Cheapest in

September

Average price

$1,172

Round-trip from

$238
High demand for flights, 60% potential price rise
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Best time to find cheap flights, 66% potential price drop
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Average for round-trip flights in May 2024
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From Green Bay Austin-Straubel to Ontario
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How far in advance should I book a flight from Green Bay to Ontario?

To save on the cost of your flight from Green Bay to Ontario, book at least 26 days before your planned departure. Booking around this time can save you about 106% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $428 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $507.

What is the cheapest month to fly from Green Bay to Ontario?

February is one of the best times of the year to fly to Ontario from Green Bay. Prices for February average $471 per person but you can even find prices for as low as $182. The most expensive prices can be found in the month of June. Opting for a February flight can save you 22% on your journey compared to booking in June

When is the cheapest time to fly from Green Bay to Ontario (GRB - ONT)?

When flying from Green Bay to Ontario, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Cheap Frontier flights from Green Bay to Ontario

Explore cheap flight options specifically provided by Frontier for the route between Green Bay and Ontario. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,749,864 searches. Data last updated May 7, 2024.
Take a peek at the cheapest Frontier flights we've detected traveling from Green Bay to Ontario. It's recommended that users confirm their flight details before booking.
Wed 5/299:27 amGRB - ONT
1 stop6h 07mFrontier
Sun 6/212:59 amONT - GRB
1 stop17h 19mFrontier
Deal found 5/6$211
Mon 5/279:27 pmGRB - ONT
1 stop28h 32mFrontier
Sun 6/212:59 amONT - GRB
1 stop17h 19mFrontier
Deal found 5/6$215
Wed 8/289:40 amGRB - ONT
1 stop28h 35mFrontier
Sun 9/11:10 pmONT - GRB
1 stop28h 36mFrontier
Deal found 5/6$249
Fri 6/146:31 pmGRB - ONT
1 stop7h 13mFrontier
Sun 6/1612:59 amONT - GRB
1 stop12h 03mFrontier
Deal found 5/6$268
Wed 8/289:40 amGRB - ONT
1 stop15h 59mFrontier
Sun 9/11:10 pmONT - GRB
1 stop28h 36mFrontier
Deal found 5/6$293
Fri 6/146:31 pmGRB - ONT
1 stop7h 13mFrontier
Mon 6/177:13 amONT - GRB
1 stop5h 49mFrontier
Deal found 5/6$328

Cheap American Airlines flights from Green Bay to Ontario

Explore cheap flight options specifically provided by American Airlines for the route between Green Bay and Ontario. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,749,864 searches. Data last updated May 7, 2024.
To aid your search, here are some of the cheapest American Airlines flights we've found from Green Bay to Ontario. Deals frequently update to provide users with more options.
Mon 5/276:01 amGRB - ONT
2 stops9h 51mAmerican Airlines
Mon 6/311:59 pmONT - GRB
2 stops9h 07mAmerican Airlines
Deal found 5/6$818
Fri 6/142:43 pmGRB - ONT
2 stops9h 26mAmerican Airlines
Mon 6/1710:54 amONT - GRB
2 stops8h 45mAmerican Airlines
Deal found 5/6$878
Fri 6/142:43 pmGRB - ONT
2 stops9h 26mAmerican Airlines
Mon 6/176:30 amONT - GRB
2 stops13h 09mAmerican Airlines
Deal found 5/6$949
Wed 5/2911:36 amGRB - ONT
2 stops8h 46mAmerican Airlines
Mon 6/36:45 amONT - GRB
2 stops12h 58mAmerican Airlines
Deal found 5/6$1,019
Sat 6/111:32 amGRB - ONT
2 stops10h 36mAmerican Airlines
Sat 6/86:30 amONT - GRB
2 stops9h 21mAmerican Airlines
Deal found 5/7$2,255

Cheap Green Bay to Ontario flights in May & June 2024

Find cheap flight options from Green Bay to Ontario specifically for the months of May and June 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,749,864 searches. Prices were last updated on May 7, 2024.
These are some of the most attractive deals on flights from Green Bay to Ontario in 2024. Check back regularly for other flight deals.
Wed 5/299:27 amGRB - ONT
1 stop6h 07mFrontier
Sun 6/212:59 amONT - GRB
1 stop17h 19mFrontier
Deal found 5/6$211
Mon 5/279:27 pmGRB - ONT
1 stop28h 32mFrontier
Sun 6/212:59 amONT - GRB
1 stop17h 19mFrontier
Deal found 5/6$215
Fri 6/146:31 pmGRB - ONT
1 stop7h 13mFrontier
Sun 6/1612:59 amONT - GRB
1 stop12h 03mFrontier
Deal found 5/6$268
Fri 6/146:31 pmGRB - ONT
1 stop7h 13mFrontier
Mon 6/177:13 amONT - GRB
1 stop5h 49mFrontier
Deal found 5/6$328
Fri 6/146:31 pmGRB - ONT
1 stop21h 27mFrontier
Tue 6/188:29 amONT - GRB
1 stop26h 17mFrontier
Deal found 5/7$335
Thu 6/65:19 amGRB - ONT
1 stop8h 21mDelta
Thu 6/1310:00 pmONT - GRB
2 stops10h 21mDelta
Deal found 5/7$398
Thu 6/65:19 amGRB - ONT
1 stop8h 21mDelta
Thu 6/1311:30 amONT - GRB
1 stop9h 17mDelta
Deal found 5/7$443
Thu 6/612:05 pmGRB - ONT
2 stops12h 42mDelta
Thu 6/1310:00 pmONT - GRB
2 stops10h 21mDelta
Deal found 5/7$458
Mon 5/276:01 amGRB - ONT
2 stops9h 51mAmerican Airlines
Mon 6/311:59 pmONT - GRB
2 stops9h 07mAmerican Airlines
Deal found 5/6$818

Green Bay to Ontario 2024 flight deals

Discover exclusive flight deals for travel between Green Bay and Ontario in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 2,749,864 searches. Data last updated May 7, 2024.
These are some of the most attractive deals on flights from Green Bay to Ontario in 2024. Check back regularly for other flight deals.
Fri 8/168:22 pmGRB - ONT
1 stop12h 08mFrontier
Sun 8/1812:49 amONT - GRB
1 stop16h 57mFrontier
Deal found 5/7$178
Wed 5/299:27 amGRB - ONT
1 stop6h 07mFrontier
Sun 6/212:59 amONT - GRB
1 stop17h 19mFrontier
Deal found 5/6$211
Mon 5/279:27 pmGRB - ONT
1 stop28h 32mFrontier
Sun 6/212:59 amONT - GRB
1 stop17h 19mFrontier
Deal found 5/6$215
Wed 8/289:40 amGRB - ONT
1 stop28h 35mFrontier
Sun 9/11:10 pmONT - GRB
1 stop28h 36mFrontier
Deal found 5/6$249
Fri 6/146:31 pmGRB - ONT
1 stop7h 13mFrontier
Sun 6/1612:59 amONT - GRB
1 stop12h 03mFrontier
Deal found 5/6$268
Wed 8/289:40 amGRB - ONT
1 stop15h 59mFrontier
Sun 9/11:10 pmONT - GRB
1 stop28h 36mFrontier
Deal found 5/6$293
Fri 6/146:31 pmGRB - ONT
1 stop7h 13mFrontier
Mon 6/177:13 amONT - GRB
1 stop5h 49mFrontier
Deal found 5/6$328
Fri 6/146:31 pmGRB - ONT
1 stop21h 27mFrontier
Tue 6/188:29 amONT - GRB
1 stop26h 17mFrontier
Deal found 5/7$335
Thu 6/65:19 amGRB - ONT
1 stop8h 21mDelta
Thu 6/1310:00 pmONT - GRB
2 stops10h 21mDelta
Deal found 5/7$398

One-way flights to Ontario from Green Bay

Search for one-way flight options from Green Bay to Ontario. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 2,749,864 searches. Data last updated May 7, 2024.
Users traveling one-way from Green Bay to Ontario can select one of these great deals. For those needing a return trip from Green Bay, there is a search form available above.
Sat 8/106:30 amGRB - ONT
2 stops16h 42mUnited Airlines
Deal found 5/5$371
Fri 5/1710:52 amGRB - ONT
2 stops14h 12mUnited Airlines
Deal found 5/5$456

Find flights from Green Bay to Ontario within your budget

Customize your flight search to find flights from Green Bay to Ontario 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 2,749,864 searches. Data last updated May 7, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$211 - $818

Route

Depart

Return

Price

Green Bay Austin-StraubelOntario

GRB - ONT

GRBONT

Green Bay Austin-Straubel

Wed 5/29

1 stop6h 07m

Ontario

Sun 6/2

1 stop17h 19m

$211

Green Bay Austin-StraubelOntario

GRB - ONT

GRBONT

Green Bay Austin-Straubel

Mon 5/27

1 stop28h 32m

Ontario

Sun 6/2

1 stop17h 19m

$215

Green Bay Austin-StraubelOntario

GRB - ONT

GRBONT

Green Bay Austin-Straubel

Wed 8/28

1 stop28h 35m

Ontario

Sun 9/1

1 stop28h 36m

$249

Green Bay Austin-StraubelOntario

GRB - ONT

GRBONT

Green Bay Austin-Straubel

Fri 6/14

1 stop7h 13m

Ontario

Sun 6/16

1 stop12h 03m

$268

Green Bay Austin-StraubelOntario

GRB - ONT

GRBONT

Green Bay Austin-Straubel

Wed 8/28

1 stop15h 59m

Ontario

Sun 9/1

1 stop28h 36m

$293

Green Bay Austin-StraubelOntario

GRB - ONT

GRBONT

Green Bay Austin-Straubel

Fri 6/14

1 stop7h 13m

Ontario

Mon 6/17

1 stop5h 49m

$328

Green Bay Austin-StraubelOntario

GRB - ONT

GRBONT

Green Bay Austin-Straubel

Tue 9/17

1 stop15h 37m

Ontario

Sat 9/21

1 stop7h 10m

$536

Green Bay Austin-StraubelOntario

GRB - ONT

GRBONT

Green Bay Austin-Straubel

Tue 9/17

2 stops10h 16m

Ontario

Sat 9/21

2 stops24h 31m

$577

Green Bay Austin-StraubelOntario

GRB - ONT

GRBONT

Green Bay Austin-Straubel

Mon 5/27

2 stops9h 51m

Ontario

Mon 6/3

2 stops9h 07m

$818

Flights are sorted by cheapest first

Deals found on 5/6

When is the cheapest time to fly from Green Bay to Ontario?

Use this chart to determine the cheapest time to fly round-trip from Green Bay to Ontario. Price data was last updated on May 5, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their Green Bay to Ontario flight should consider departing on Thursday mornings when fares are most often at their lowest. Thursday mornings flights should be avoided if possible as fares are typically the most expensive at this time.
Search Deals

Average price of flights to Ontario by month

Plan your trip from Green Bay to Ontario by taking into account the cheapest months to travel. The average price of a one-way flight from Green Bay to Ontario is currently $414 while a round-trip flight costs $388. Price data was last updated on April 28, 2024.

Currently, October is the cheapest month in which you can book a flight from Green Bay to Ontario (average of $237). Flying from Green Bay to Ontario in June is currently the most expensive (average of $337). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

January

$268

February

$287

March

$281

April

$256

May

$268

June

$337

July

$337

August

$287

September

$258

October

$237

November

$267

December

$272

Temperature and rainfall in Ontario by month

Plan your trip to Ontario by taking into account the average temperature and rainfall totals by month.

LAX

Temperature

57.2 - 73.4 °F

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated May 7, 2024.
Read reviews from past customers who have flown Frontier, American Airlines and Delta from Green Bay to Ontario. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.1
Very good
10,810 reviews
Check prices

Crew

8.6

Entertainment

8.0

Food

7.4

Boarding

8.2

Comfort

7.9

Overall

8.1

Reviews

1 / 10

Crew was nice and courteous. Boarding went smoothly. But we experienced a few minutes of extreme turbulence.

Delta
8.1
Very good
10,810 reviews
Delta
8.1
Very good
10,810 reviews
Check prices

Crew

8.6

Entertainment

8.0

Food

7.4

Boarding

8.2

Comfort

7.9

Overall

8.1

Reviews

1 / 10

Crew was nice and courteous. Boarding went smoothly. But we experienced a few minutes of extreme turbulence.

United Airlines
7.4
Good
11,073 reviews
Delta
8.1
Very good
10,810 reviews
Check prices

Crew

8.6

Entertainment

8.0

Food

7.4

Boarding

8.2

Comfort

7.9

Overall

8.1

Reviews

1 / 10

Crew was nice and courteous. Boarding went smoothly. But we experienced a few minutes of extreme turbulence.

American Airlines
7.3
Good
14,686 reviews
Delta
8.1
Very good
10,810 reviews
Check prices

Crew

8.6

Entertainment

8.0

Food

7.4

Boarding

8.2

Comfort

7.9

Overall

8.1

Reviews

1 / 10

Crew was nice and courteous. Boarding went smoothly. But we experienced a few minutes of extreme turbulence.

Frontier
6.3
Okay
4,088 reviews
Delta
8.1
Very good
10,810 reviews
Check prices

Crew

8.6

Entertainment

8.0

Food

7.4

Boarding

8.2

Comfort

7.9

Overall

8.1

Reviews

1 / 10

Crew was nice and courteous. Boarding went smoothly. But we experienced a few minutes of extreme turbulence.

Related info for your journey

Find useful and relevant information for your journey from Green Bay to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • Can I find flights from Green Bay to Ontario for under $300 on Cheapflights?

    Yes, there are multiple flights from Green Bay to Ontario for under $300. The cheapest flight booked recently is on Frontier for just $211, but on average you can expect to pay $655.

  • What are the cheapest airlines flying from Green Bay to Ontario round-trip?

    Currently priced at $211, Frontier will fly you from Green Bay to Ontario and back. In addition to Frontier, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Delta and United Airlines - these airlines can fly you to your destination from $536 and $577, respectively. These flights start at 64% lower than the current average price 3 months from now.

  • What does GRB to ONT mean?

    These are just IATA (International Air Transport Association) codes. They are used in aviation to identify and differentiate airports. That’s why a Green Bay Austin-Straubel Airport to Ontario Airport flight would often be abbreviated as a GRB to ONT flight.

  • Can I find deals for flights from Green Bay to Ontario that include extra baggage allowance?

    The amount of baggage you can bring on your Green Bay to Ontario flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from Green Bay to Ontario with specific airlines?

    Yes, Cheapflights allows you to browse and filter Green Bay to Ontario flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

  • Can I find deals for flights from Green Bay to Ontario that include hotel bookings?

    Yes. In addition to deals on Green Bay to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Green Bay to Ontario?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Green Bay to Ontario.

  • Can I find deals for business class flights from Green Bay to Ontario?

    Yes. Cheapflights offers flight deals from Green Bay to Ontario by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • Can I find deals for flights from Green Bay to Ontario that allow pets onboard?

    Many airlines flying from Green Bay to Ontario offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from Green Bay to Ontario?

    Yes, you can often find last-minute deals on Green Bay to Ontario flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the Green Bay to Ontario flight deals updated?

    The Green Bay to Ontario flight deals you see on this page were last updated on 5/7.

See more FAQs

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Search flights from Green Bay to Ontario by cabin class

Find flights from Green Bay to Ontario, based on your preferred cabin class, be it economy, premium economy, business, or first class.
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Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Green Bay to Ontario?

Deals for Green Bay to Ontario flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from Green Bay to Ontario?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Green Bay to Ontario for you. Better yet — we are completely free to use.

Can Cheapflights find flights from Green Bay to Ontario with no change fees?

Need flexible booking options for your flight to Ontario from Green Bay? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Green Bay to Ontario become cheaper?

Yes, Cheapflights offers price alerts on Green Bay to Ontario flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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