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Cheap flights from Green Bay to Ontario (GRB - ONT) from $136

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 7/5. 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
Jun 7 — Jun 141
From?
To?
Fri 6/7
Fri 6/14
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 June 2, 2024.

Popular in

March

Cheapest in

September

Average price

$285

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 June 2024
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From Green Bay Austin-Straubel to Ontario
Search Deals

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 102% 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 $497.

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

January is one of the best times of the year to fly to Ontario from Green Bay. Prices for January average $466 per person but you can even find prices for as low as $250. The most expensive prices can be found in the month of June. Opting for a January flight can save you 24% on your journey compared to booking in June

What is the cheapest time of day to fly from GRB to 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 2,810,401 searches. Data last updated June 2, 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.
Fri 6/286:33 pmGRB - ONT
1 stop7h 07mFrontier
Sun 6/3012:59 amONT - GRB
1 stop12h 03mFrontier
Deal found 6/1$253
Fri 7/196:33 pmGRB - ONT
1 stop7h 06mFrontier
Mon 7/297:19 amONT - GRB
1 stop5h 45mFrontier
Deal found 6/1$271
Fri 7/196:33 pmGRB - ONT
1 stop7h 06mFrontier
Tue 7/3012:59 amONT - GRB
1 stop9h 38mFrontier
Deal found 6/1$286
Mon 7/154:04 pmGRB - ONT
1 stop9h 45mFrontier
Sun 7/2812:59 amONT - GRB
1 stop12h 05mFrontier
Deal found 6/1$310
Mon 7/154:04 pmGRB - ONT
1 stop9h 45mFrontier
Tue 7/3012:59 amONT - GRB
1 stop9h 38mFrontier
Deal found 6/1$325
Fri 6/76:33 pmGRB - ONT
1 stop7h 07mFrontier
Sun 6/911:29 amONT - GRB
1 stop25h 33mFrontier
Deal found 6/1$367
Fri 6/216:32 pmGRB - ONT
1 stop7h 08mFrontier
Tue 7/212:59 amONT - GRB
1 stop9h 47mFrontier
Deal found 6/1$414

Cheap Delta flights from Green Bay to Ontario

Explore cheap flight options specifically provided by Delta 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 2,810,401 searches. Data last updated June 2, 2024.
To aid your search, here are some of the cheapest Delta flights we've found from Green Bay to Ontario. Deals frequently update to provide users with more options.
Tue 7/166:15 amGRB - ONT
2 stops8h 00mDelta
Tue 7/3011:23 amONT - GRB
1 stop10h 08mDelta
Deal found 6/1$553
Fri 6/74:22 pmGRB - ONT
2 stops9h 20mDelta
Sun 6/911:30 amONT - GRB
1 stop9h 17mDelta
Deal found 6/1$923

Cheap Green Bay to Ontario flights in June & July 2024

Find cheap flight options from Green Bay to Ontario specifically for the months of June and July 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,810,401 searches. Prices were last updated on June 2, 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 6/286:33 pmGRB - ONT
1 stop7h 07mFrontier
Sun 6/3012:59 amONT - GRB
1 stop12h 03mFrontier
Deal found 6/1$253
Fri 6/76:33 pmGRB - ONT
1 stop7h 07mFrontier
Sun 6/911:29 amONT - GRB
1 stop25h 33mFrontier
Deal found 6/1$367
Fri 6/216:32 pmGRB - ONT
1 stop7h 08mFrontier
Tue 7/212:59 amONT - GRB
1 stop9h 47mFrontier
Deal found 5/31$414
Fri 6/73:50 pmGRB - ONT
2 stops10h 19mUnited Airlines
Sun 6/96:25 pmONT - GRB
2 stops24h 37mUnited Airlines
Deal found 6/1$737
Fri 6/212:43 pmGRB - ONT
2 stops20h 04mAmerican Airlines
Wed 7/311:59 pmONT - GRB
2 stops12h 19mAmerican Airlines
Deal found 5/31$765
Fri 6/2111:28 amGRB - ONT
2 stops12h 41mAmerican Airlines
Wed 7/311:59 pmONT - GRB
2 stops12h 19mAmerican Airlines
Deal found 6/1$783
Fri 6/282:43 pmGRB - ONT
2 stops8h 57mAmerican Airlines
Mon 7/111:59 pmONT - GRB
2 stops9h 04mAmerican Airlines
Deal found 6/1$808
Sat 6/111:32 amGRB - ONT
2 stops9h 16mAmerican Airlines
Sun 6/29:30 amONT - GRB
2 stops10h 13mAmerican Airlines
Deal found 5/31$828
Fri 6/73:50 pmGRB - ONT
2 stops10h 19mUnited Airlines
Sun 6/95:50 amONT - GRB
3 stops26h 27mUnited Airlines
Deal found 6/1$852

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 2,810,401 searches. Data last updated June 2, 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 6/286:33 pmGRB - ONT
1 stop7h 07mFrontier
Sun 6/3012:59 amONT - GRB
1 stop12h 03mFrontier
Deal found 6/1$253
Fri 10/48:22 pmGRB - ONT
1 stop12h 08mFrontier
Sun 10/612:49 amONT - GRB
1 stop16h 57mFrontier
Deal found 5/31$312
Fri 6/76:33 pmGRB - ONT
1 stop7h 07mFrontier
Sun 6/911:29 amONT - GRB
1 stop25h 33mFrontier
Deal found 6/1$367
Fri 6/216:32 pmGRB - ONT
1 stop7h 08mFrontier
Tue 7/212:59 amONT - GRB
1 stop9h 47mFrontier
Deal found 5/31$414
Wed 7/310:52 amGRB - ONT
2 stops11h 56mUnited Airlines
Sat 7/135:10 amONT - GRB
2 stops9h 49mUnited Airlines
Deal found 5/31$568
Sun 7/215:10 amGRB - ONT
1 stop7h 03mDelta
Sat 7/276:50 amONT - GRB
2 stops13h 11mDelta
Deal found 5/31$618
Sun 7/2111:28 amGRB - ONT
2 stops13h 32mAmerican Airlines
Sat 7/277:21 pmONT - GRB
2 stops13h 39mAmerican Airlines
Deal found 5/31$631
Wed 7/311:28 amGRB - ONT
2 stops12h 12mAmerican Airlines
Sat 7/67:21 pmONT - GRB
2 stops17h 01mAmerican Airlines
Deal found 5/30$639
Sun 7/215:10 amGRB - ONT
1 stop7h 03mDelta
Sat 7/2711:23 amONT - GRB
1 stop10h 08mDelta
Deal found 5/31$703

Green Bay to Ontario flights leaving soon

Find last-minute flight options from Green Bay to Ontario for spontaneous travel. Discover available flights and compare prices based on user searches. Secure great deals and offers for spontaneous trips with quick booking options. Over the last 7 days, Cheapflights users made 2,810,401 searches. Data last updated June 2, 2024.
Users seeking a last-minute flight from Green Bay to Ontario should consider booking one of these fares. Users should be sure to double check the price, date, and time of their last-minute flight.
Fri 6/76:33 pmGRB - ONT
1 stop7h 07mFrontier
Sun 6/911:29 amONT - GRB
1 stop25h 33mFrontier
Deal found 6/1$367
Fri 6/73:50 pmGRB - ONT
2 stops10h 19mUnited Airlines
Sun 6/96:25 pmONT - GRB
2 stops24h 37mUnited Airlines
Deal found 6/1$737
Fri 6/73:50 pmGRB - ONT
2 stops10h 19mUnited Airlines
Sun 6/95:50 amONT - GRB
3 stops26h 27mUnited Airlines
Deal found 6/1$852
Fri 6/74:22 pmGRB - ONT
2 stops9h 20mDelta
Sun 6/911:30 amONT - GRB
1 stop9h 17mDelta
Deal found 6/1$923

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 2,810,401 searches. Data last updated June 2, 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.
Fri 7/56:33 pmGRB - ONT
1 stop7h 07mFrontier
Deal found 6/1$136
Mon 7/294:04 pmGRB - ONT
1 stop9h 45mFrontier
Deal found 6/1$241
Fri 7/56:30 amGRB - ONT
2 stops16h 18mUnited Airlines
Deal found 6/1$318
Mon 7/296:18 pmGRB - ONT
2 stops17h 36mAmerican Airlines
Deal found 6/1$409
Sat 7/66:30 amGRB - ONT
2 stops8h 03mUnited Airlines
Deal found 6/1$478
Sun 6/235:25 pmGRB - ONT
2 stops21h 20mUnited Airlines
Deal found 6/1$483
Sat 7/65:05 amGRB - ONT
1 stop16h 39mDelta
Deal found 6/1$782
Sun 6/96:25 amGRB - ONT
2 stops7h 52mDelta
Deal found 6/1$1,355
Thu 6/136:25 amGRB - ONT
2 stops7h 52mDelta
Deal found 6/1$2,246

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 2,810,401 searches. Data last updated June 2, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$253 - $783

Route

Depart

Return

Price

Green Bay Austin-StraubelOntario

GRB - ONT

GRBONT

Green Bay Austin-Straubel

Fri 6/28

1 stop7h 07m

Ontario

Sun 6/30

1 stop12h 03m

$253

Green Bay Austin-StraubelOntario

GRB - ONT

GRBONT

Green Bay Austin-Straubel

Fri 7/19

1 stop7h 06m

Ontario

Mon 7/29

1 stop5h 45m

$271

Green Bay Austin-StraubelOntario

GRB - ONT

GRBONT

Green Bay Austin-Straubel

Fri 7/19

1 stop7h 06m

Ontario

Tue 7/30

1 stop9h 38m

$286

Green Bay Austin-StraubelOntario

GRB - ONT

GRBONT

Green Bay Austin-Straubel

Mon 7/15

1 stop9h 45m

Ontario

Sun 7/28

1 stop12h 05m

$310

Green Bay Austin-StraubelOntario

GRB - ONT

GRBONT

Green Bay Austin-Straubel

Mon 7/15

1 stop9h 45m

Ontario

Tue 7/30

1 stop9h 38m

$325

Green Bay Austin-StraubelOntario

GRB - ONT

GRBONT

Green Bay Austin-Straubel

Fri 6/21

1 stop7h 08m

Ontario

Tue 7/2

1 stop9h 47m

$414

Green Bay Austin-StraubelOntario

GRB - ONT

GRBONT

Green Bay Austin-Straubel

Tue 7/16

2 stops8h 00m

Ontario

Tue 7/30

1 stop10h 08m

$553

Green Bay Austin-StraubelOntario

GRB - ONT

GRBONT

Green Bay Austin-Straubel

Thu 8/1

2 stops11h 29m

Ontario

Wed 8/7

2 stops13h 22m

$720

Green Bay Austin-StraubelOntario

GRB - ONT

GRBONT

Green Bay Austin-Straubel

Fri 6/21

2 stops12h 41m

Ontario

Wed 7/3

2 stops12h 19m

$783

Flights are sorted by cheapest first

Deals found on 6/1

What is the cheapest day 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 26, 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

Best time to book a flight from Green Bay to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Green Bay with our price prediction graph.
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.

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 June 2, 2024.
Read reviews from past customers who have flown Frontier, Delta and American Airlines 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
8.0
Very good
10,410 reviews
Check prices

Food

7.4

Boarding

8.2

Overall

8.0

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
8.0
Very good
10,410 reviews
Delta
8.0
Very good
10,410 reviews
Check prices

Food

7.4

Boarding

8.2

Overall

8.0

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
10,754 reviews
Delta
8.0
Very good
10,410 reviews
Check prices

Food

7.4

Boarding

8.2

Overall

8.0

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
14,268 reviews
Delta
8.0
Very good
10,410 reviews
Check prices

Food

7.4

Boarding

8.2

Overall

8.0

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
6.2
Okay
4,006 reviews
Delta
8.0
Very good
10,410 reviews
Check prices

Food

7.4

Boarding

8.2

Overall

8.0

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 $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 $253, but on average you can expect to pay $532.

  • Are there last-minute flights available from Green Bay to Ontario for under $400?

    There are currently 4+ open flights from Green Bay to Ontario within the next 7 days for less than $400.

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

    Currently priced at $253, 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 American Airlines - these airlines can fly you to your destination from $553 and $720, respectively. These flights start at 57% lower than the current average price 3 months from now.

  • 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 $136 on Frontier. Other airlines that offer cheap prices include United Airlines from $318 and American Airlines from $409 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 6/1.

  • What is the cheapest month to book a flight from Green Bay to Ontario?

    Currently, October is the cheapest month in which you can book a flight from Green Bay to Ontario (average of $238). Flying from Green Bay to Ontario in July is currently the most expensive (average of $328). 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.

See more FAQs

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Alternative routes for Green Bay to Ontario
See prices for flight routes from nearby airports that may be better suited for you.

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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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