$1,022+ Cheap flights from Green Bay to Islip, NY (GRB - ISP)
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 10/29. Fares are subject to change and may not be available on all flights or dates of travel.
GRB — ISP
Nov 5 — Nov 121
Round-trip
1 adult, Economy
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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
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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 Green Bay to Islip
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Cheapest flights from Green Bay to IslipExplore the most affordable flight options available from Green Bay to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 6, 2026.
Explore the most affordable flight options available from Green Bay to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 6, 2026.
This United deal was found by Cheapflights users on 10/4. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/295:55 pm -
2 stops16h 14m
Sun 11/19:59 am -
2 stops13h 39m
Deal found 10/4![Multiple Airlines logo]()
$1,022
Best flights from Green Bay to IslipDiscover carefully curated flight deals from Green Bay to Islip that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 6, 2026.
Discover carefully curated flight deals from Green Bay to Islip that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 6, 2026.
This United deal was found by Cheapflights users on 10/4. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/295:55 pm -
2 stops16h 14m
Sun 11/19:59 am -
2 stops13h 39m
Deal found 10/4![Multiple Airlines logo]()
$1,022
Last-minute flights from Green Bay to IslipDiscover last-minute flight deals from Green Bay to Islip. Data last updated October 6, 2026 and is based on user searches.
Discover last-minute flight deals from Green Bay to Islip. Data last updated October 6, 2026 and is based on user searches.
This United deal was found by Cheapflights users on 10/4. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/295:55 pm -
2 stops16h 14m
Sun 11/19:59 am -
2 stops13h 39m
Deal found 10/4![Multiple Airlines logo]()
$1,022
Find flight deals from Green Bay to Islip
Discover tips and strategies to find the most affordable flight options for your journey from Green Bay (GRB) to Islip (ISP). 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 October 6, 2026.
Most accurate provider | Expedia 1 star |
|---|---|
Most trusted provider | Expedia 3 stars |
Round-trip from | $1,022 (United) |
Popular in | July |
Cheapest in | January |
Average price | $511 |
Cheapflights Fare Finder
Customize your flight search to find flights from Green Bay to Islip 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 7,457,451 searches. Data last updated October 6, 2026.
Use the filters below to find and compare flights from Green Bay to Islip that are best for you.
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Route
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Cheapest round-trip
Quickest round-trip
Green BayIslip
GRB Green Bay Austin-Straubel - ISP Islip Long Island
GRBISP
Green Bay Austin-Straubel
Thu 10/29
5:55 pm-11:09 am
2 stops16h 14m
Islip Long Island
Sun 11/1
9:59 am-10:38 pm
2 stops13h 39m
$1,022
Sorted by cheapest first
- Most accurate provider: When it comes to deals on Green Bay-Islip, New York flights, users find the pricing of Expedia to be most consistent on Cheapflights vs. Expedia Users can find the same prices on Green Bay-Islip, New York flight deals on Cheapflights vs. Expedia <90% of the time. Price accuracy is based on data collected from Green Bay-Islip, New York flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Green Bay-Islip, New York flights, Cheapflights users trust Expedia the most. Expedia 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 Green Bay-Islip, New York 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 Green Bay to Islip
Have a flexible travel schedule? Discover the best time to fly to Islip from Green Bay with our price prediction graph.
GRB-ISP
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.
Related info for your journey
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Book flights to Islip if you plan to visit one of these locationsRiverhead
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