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Cheap flights from Green Bay to Ontario (GRB - ONT) from $125

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 5/9. 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 6 — May 131
From?
To?
Mon 5/6
Mon 5/13
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 1, 2024.

Round-trip from

$238

One-way from

$229
From Green Bay Austin-Straubel to Ontario
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One-way flight from Green Bay Austin-Straubel to Ontario
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What is the cheapest day to fly round-trip from Green Bay to Ontario?

Users have found that leaving on a Wednesday can be a cost-effective option. It’s possible to save up to 7% on your flight compared to booking on days when demand is much higher.

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 48 days before your planned departure. Booking around this time can save you about 44% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $460 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $878.

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

September is one of the best times of the year to fly to Ontario from Green Bay. Prices for September average $538 per person but you can even find prices for as low as $246. The most expensive prices can be found in the month of December. Opting for a September flight can save you 32% on your journey compared to booking in December

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 2,913,887 searches. Data last updated May 1, 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.
Tue 5/149:14 pmGRB - ONT
1 stop28h 45mFrontier
Thu 5/1612:59 amONT - GRB
1 stop16h 19mFrontier
Deal found 4/30$167
Wed 5/229:27 amGRB - ONT
1 stop6h 07mFrontier
Sun 5/2612:59 amONT - GRB
1 stop17h 28mFrontier
Deal found 4/29$184
Wed 5/229:27 amGRB - ONT
1 stop6h 07mFrontier
Mon 5/279:05 amONT - GRB
1 stop9h 22mFrontier
Deal found 4/29$213
Fri 5/248:22 pmGRB - ONT
1 stop13h 17mFrontier
Sun 5/2612:59 amONT - GRB
1 stop17h 28mFrontier
Deal found 4/30$229
Fri 5/248:22 pmGRB - ONT
1 stop13h 17mFrontier
Mon 5/279:05 amONT - GRB
1 stop9h 22mFrontier
Deal found 4/30$302
Mon 7/158:46 pmGRB - ONT
1 stop17h 46mFrontier
Thu 7/181:10 pmONT - GRB
1 stop28h 11mFrontier
Deal found 4/30$350
Wed 7/109:40 amGRB - ONT
1 stop11h 57mFrontier
Tue 7/1612:49 amONT - GRB
1 stop5h 51mFrontier
Deal found 4/30$369
Mon 7/88:46 pmGRB - ONT
1 stop28h 53mFrontier
Sun 7/1412:49 amONT - GRB
1 stop16h 57mFrontier
Deal found 4/30$448

Cheap United Airlines flights from Green Bay to Ontario

Explore cheap flight options specifically provided by United 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 2,913,887 searches. Data last updated May 1, 2024.
To aid your search, here are some of the cheapest United Airlines flights we've found from Green Bay to Ontario. Deals frequently update to provide users with more options.
Thu 8/1510:52 amGRB - ONT
2 stops12h 19mUnited Airlines
Tue 8/206:45 pmONT - GRB
2 stops13h 26mUnited Airlines
Deal found 4/30$523
Tue 9/1710:51 amGRB - ONT
2 stops12h 11mUnited Airlines
Sat 9/217:40 amONT - GRB
2 stops24h 31mUnited Airlines
Deal found 4/29$662
Tue 9/171:15 pmGRB - ONT
2 stops10h 16mUnited Airlines
Sat 9/217:40 amONT - GRB
2 stops24h 31mUnited Airlines
Deal found 4/30$667
Mon 7/1510:52 amGRB - ONT
2 stops13h 53mUnited Airlines
Thu 7/181:45 pmONT - GRB
2 stops29h 37mUnited Airlines
Deal found 4/30$948

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 2,913,887 searches. Prices were last updated on May 1, 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.
Tue 5/149:14 pmGRB - ONT
1 stop28h 45mFrontier
Thu 5/1612:59 amONT - GRB
1 stop16h 19mFrontier
Deal found 4/30$167
Tue 5/149:14 pmGRB - ONT
1 stop11h 12mFrontier
Thu 5/1612:59 amONT - GRB
1 stop16h 19mFrontier
Deal found 5/1$175
Wed 5/229:27 amGRB - ONT
1 stop6h 07mFrontier
Sun 5/2612:59 amONT - GRB
1 stop17h 28mFrontier
Deal found 4/29$184
Wed 5/229:27 amGRB - ONT
1 stop6h 07mFrontier
Mon 5/279:05 amONT - GRB
1 stop9h 22mFrontier
Deal found 4/29$213
Fri 5/248:22 pmGRB - ONT
1 stop13h 17mFrontier
Sun 5/2612:59 amONT - GRB
1 stop17h 28mFrontier
Deal found 4/30$229
Fri 5/248:22 pmGRB - ONT
1 stop13h 17mFrontier
Mon 5/279:05 amONT - GRB
1 stop9h 22mFrontier
Deal found 4/30$302
Sun 5/55:10 amGRB - ONT
1 stop8h 22mDelta
Mon 5/612:42 pmONT - GRB
1 stop8h 27mDelta
Deal found 4/30$518
Sun 5/56:00 amGRB - ONT
2 stops14h 07mAmerican Airlines
Mon 5/611:59 pmONT - GRB
2 stops9h 07mAmerican Airlines
Deal found 4/30$548
Sun 5/55:10 amGRB - ONT
1 stop8h 22mDelta
Mon 5/65:40 pmONT - GRB
2 stops15h 00mDelta
Deal found 4/30$553

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 2,913,887 searches. Data last updated May 1, 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.
Tue 5/149:14 pmGRB - ONT
1 stop28h 45mFrontier
Thu 5/1612:59 amONT - GRB
1 stop16h 19mFrontier
Deal found 4/30$167
Tue 5/149:14 pmGRB - ONT
1 stop11h 12mFrontier
Thu 5/1612:59 amONT - GRB
1 stop16h 19mFrontier
Deal found 5/1$175
Wed 5/229:27 amGRB - ONT
1 stop6h 07mFrontier
Sun 5/2612:59 amONT - GRB
1 stop17h 28mFrontier
Deal found 4/29$184
Wed 5/229:27 amGRB - ONT
1 stop6h 07mFrontier
Mon 5/279:05 amONT - GRB
1 stop9h 22mFrontier
Deal found 4/29$213
Fri 5/248:22 pmGRB - ONT
1 stop13h 17mFrontier
Sun 5/2612:59 amONT - GRB
1 stop17h 28mFrontier
Deal found 4/30$229
Fri 5/248:22 pmGRB - ONT
1 stop13h 17mFrontier
Mon 5/279:05 amONT - GRB
1 stop9h 22mFrontier
Deal found 4/30$302
Mon 7/158:46 pmGRB - ONT
1 stop17h 46mFrontier
Thu 7/181:10 pmONT - GRB
1 stop28h 11mFrontier
Deal found 4/30$350
Wed 7/109:40 amGRB - ONT
1 stop11h 57mFrontier
Tue 7/1612:49 amONT - GRB
1 stop5h 51mFrontier
Deal found 4/30$369
Mon 7/88:46 pmGRB - ONT
1 stop28h 53mFrontier
Sun 7/1412:49 amONT - GRB
1 stop16h 57mFrontier
Deal found 4/30$448

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 2,913,887 searches. Data last updated May 1, 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.
Thu 5/94:35 pmGRB - ONT
1 stop9h 21mFrontier
Deal found 4/30$125
Fri 6/146:31 pmGRB - ONT
1 stop7h 11mFrontier
Deal found 4/30$139
Wed 7/39:40 amGRB - ONT
1 stop11h 57mFrontier
Deal found 4/30$211
Mon 7/88:46 pmGRB - ONT
1 stop17h 46mFrontier
Deal found 4/30$229
Wed 7/34:23 pmGRB - ONT
2 stops9h 19mDelta
Deal found 4/30$259
Thu 7/46:25 amGRB - ONT
2 stops7h 52mDelta
Deal found 4/30$309
Sat 7/66:19 amGRB - ONT
2 stops9h 30mAmerican Airlines
Deal found 4/30$404
Fri 6/143:50 pmGRB - ONT
2 stops22h 35mUnited Airlines
Deal found 4/30$419
Thu 5/96:30 amGRB - ONT
2 stops8h 10mUnited Airlines
Deal found 4/30$429

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 2,913,887 searches. Data last updated May 1, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$167 - $768

Route

Depart

Return

Price

Green Bay Austin-StraubelOntario

GRB - ONT

GRBONT

Green Bay Austin-Straubel

Tue 5/14

1 stop28h 45m

Ontario

Thu 5/16

1 stop16h 19m

$167

Green Bay Austin-StraubelOntario

GRB - ONT

GRBONT

Green Bay Austin-Straubel

Wed 5/22

1 stop6h 07m

Ontario

Sun 5/26

1 stop17h 28m

$184

Green Bay Austin-StraubelOntario

GRB - ONT

GRBONT

Green Bay Austin-Straubel

Wed 5/22

1 stop6h 07m

Ontario

Mon 5/27

1 stop9h 22m

$213

Green Bay Austin-StraubelOntario

GRB - ONT

GRBONT

Green Bay Austin-Straubel

Fri 5/24

1 stop13h 17m

Ontario

Sun 5/26

1 stop17h 28m

$229

Green Bay Austin-StraubelOntario

GRB - ONT

GRBONT

Green Bay Austin-Straubel

Fri 5/24

1 stop13h 17m

Ontario

Mon 5/27

1 stop9h 22m

$302

Green Bay Austin-StraubelOntario

GRB - ONT

GRBONT

Green Bay Austin-Straubel

Mon 7/15

1 stop17h 46m

Ontario

Thu 7/18

1 stop28h 11m

$350

Green Bay Austin-StraubelOntario

GRB - ONT

GRBONT

Green Bay Austin-Straubel

Thu 8/15

2 stops12h 19m

Ontario

Tue 8/20

2 stops13h 26m

$523

Green Bay Austin-StraubelOntario

GRB - ONT

GRBONT

Green Bay Austin-Straubel

Tue 9/17

1 stop7h 37m

Ontario

Sat 9/21

1 stop7h 10m

$577

Green Bay Austin-StraubelOntario

GRB - ONT

GRBONT

Green Bay Austin-Straubel

Tue 5/14

2 stops8h 46m

Ontario

Fri 5/17

2 stops9h 07m

$768

Flights are sorted by cheapest first

Deals found on 4/30

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 April 28, 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 $280 while a round-trip flight costs $368. 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 $341). 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

$341

July

$336

August

$287

September

$258

October

$237

November

$268

December

$271

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 1, 2024.
Read reviews from past customers who have flown Frontier, United 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
10,874 reviews
Check prices

Food

7.4

Boarding

8.2

Overall

8.1

Comfort

7.9

Crew

8.6

Entertainment

8.0

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
10,874 reviews
Delta
8.1
Very good
10,874 reviews
Check prices

Food

7.4

Boarding

8.2

Overall

8.1

Comfort

7.9

Crew

8.6

Entertainment

8.0

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
11,159 reviews
Delta
8.1
Very good
10,874 reviews
Check prices

Food

7.4

Boarding

8.2

Overall

8.1

Comfort

7.9

Crew

8.6

Entertainment

8.0

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
14,788 reviews
Delta
8.1
Very good
10,874 reviews
Check prices

Food

7.4

Boarding

8.2

Overall

8.1

Comfort

7.9

Crew

8.6

Entertainment

8.0

Reviews

1 / 10

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

Frontier
6.3
Okay
4,114 reviews
Delta
8.1
Very good
10,874 reviews
Check prices

Food

7.4

Boarding

8.2

Overall

8.1

Comfort

7.9

Crew

8.6

Entertainment

8.0

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 $200 on Cheapflights?

    Yes, there are multiple flights from Green Bay to Ontario for under $200. The cheapest flight booked recently is on Frontier for just $167, but on average you can expect to pay $504.

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

    Currently priced at $167, 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 United Airlines and Delta - these airlines can fly you to your destination from $523 and $577, respectively.

  • What are the cheapest airlines to fly from Green Bay to Ontario one-way?

    One-way options have recently been found by users for as low as $125 on Frontier. Other airlines that offer cheap prices include Delta from $259 and American Airlines from $404 one-way.

  • 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 5/1.

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.
First Class
Business 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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