$124 Cheap Flights from Grand Rapids (GRR) to Islip (ISP)

View $124 flight on Sat, Oct 18, 2025Opens in a new window

Popular airlines from Gerald R. Ford International Airport (GRR) to MacArthur Airport (ISP)

Cheap Flights from Grand Rapids to Islip (GRR-ISP)

Prices were available within the past 7 days and start at $124 for one-way flights and $236 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Mon, Jun 30 - Wed, Jul 9
GRR
Grand Rapids
ISP
Islip
$236 Roundtrip, found 5 hours ago
$236
Roundtrip
found 5 hours ago
Select Frontier Airlines flight, departing Mon, Jun 30 from Grand Rapids to Islip, returning Wed, Jul 9, priced at $236 found 5 hours ago
Frontier Airlines
Mon, Jun 30 - Wed, Jul 2
GRR
Grand Rapids
ISP
Islip
$261 Roundtrip, found 5 hours ago
$261
Roundtrip
found 5 hours ago
Select Frontier Airlines flight, departing Mon, Jun 30 from Grand Rapids to Islip, returning Wed, Jul 2, priced at $261 found 5 hours ago
Frontier Airlines
Thu, Jul 3 - Wed, Jul 9
GRR
Grand Rapids
ISP
Islip
$288 Roundtrip, found 5 hours ago
$288
Roundtrip
found 5 hours ago
Select Frontier Airlines flight, departing Thu, Jul 3 from Grand Rapids to Islip, returning Wed, Jul 9, priced at $288 found 5 hours ago
Frontier Airlines
Fri, Jul 4 - Wed, Jul 9
GRR
Grand Rapids
ISP
Islip
$292 Roundtrip, found 5 hours ago
$292
Roundtrip
found 5 hours ago
Select Frontier Airlines flight, departing Fri, Jul 4 from Grand Rapids to Islip, returning Wed, Jul 9, priced at $292 found 5 hours ago
Southwest Airlines
Tue, Jul 15 - Sat, Jul 19
GRR
Grand Rapids
ISP
Islip
$296 Roundtrip, found 4 days ago
$296
Roundtrip
found 4 days ago
Select Southwest Airlines flight, departing Tue, Jul 15 from Grand Rapids to Islip, returning Sat, Jul 19, priced at $296 found 4 days ago
Southwest Airlines
Tue, Jul 15 - Sun, Jul 20
GRR
Grand Rapids
ISP
Islip
$303 Roundtrip, found 4 days ago
$303
Roundtrip
found 4 days ago
Select Southwest Airlines flight, departing Tue, Jul 15 from Grand Rapids to Islip, returning Sun, Jul 20, priced at $303 found 4 days ago
Frontier Airlines
Mon, Jun 30 - Thu, Jul 3
GRR
Grand Rapids
ISP
Islip
$303 Roundtrip, found 5 hours ago
$303
Roundtrip
found 5 hours ago
Select Frontier Airlines flight, departing Mon, Jun 30 from Grand Rapids to Islip, returning Thu, Jul 3, priced at $303 found 5 hours ago
Southwest Airlines
Tue, Jul 15 - Sat, Jul 19
GRR
Grand Rapids
ISP
Islip
$312 Roundtrip, found 4 days ago
$312
Roundtrip
found 4 days ago
Select Southwest Airlines flight, departing Tue, Jul 15 from Grand Rapids to Islip, returning Sat, Jul 19, priced at $312 found 4 days ago
Southwest Airlines
Tue, Jul 15 - Sat, Jul 19
GRR
Grand Rapids
ISP
Islip
$317 Roundtrip, found 4 days ago
$317
Roundtrip
found 4 days ago
Select Southwest Airlines flight, departing Tue, Jul 15 from Grand Rapids to Islip, returning Sat, Jul 19, priced at $317 found 4 days ago
Southwest Airlines
Tue, Jul 15 - Sun, Jul 20
GRR
Grand Rapids
ISP
Islip
$319 Roundtrip, found 4 days ago
$319
Roundtrip
found 4 days ago
Select Southwest Airlines flight, departing Tue, Jul 15 from Grand Rapids to Islip, returning Sun, Jul 20, priced at $319 found 4 days ago
Flights from Grand Rapids (GRR) to Islip (ISP)
Origin airport
Gerald R. Ford Intl.
Destination airport
MacArthur
Roundtrip price
$236
Distance
655 mi

Grand Rapids to Islip Flights

The cheapest times to fly from Grand Rapids to Islip

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Grand Rapids to Islip are during the month of June. You can find some of the cheapest flights from Grand Rapids to Islip with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Grand Rapids to Islip

Sunday is one of the best days to book for cheap flights from Grand Rapids to Islip: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Grand Rapids to Islip

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Grand Rapids to Islip in 2025. You can also book with separate airlines for your outbound and return journeys, from $124 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Grand Rapids to Islip flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Grand Rapids to Islip airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Gerald R. Ford Intl. Airport (GRR) to MacArthur Airport (ISP) cost?
Discover the latest flight deals from GRR to ISP by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from GRR to ISP?
The cheapest flights from GRR to ISP are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from GRR to ISP?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from GRR to ISP. Sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from Gerald R. Ford Intl. Airport (GRR) to MacArthur Airport (ISP)?
There aren't any daily nonstop flights departing from Gerald R. Ford Intl. Airport (GRR) to MacArthur Airport (ISP). But you can choose flights with layovers. Filter your search results on Expedia to include one or two stops, and you'll be cruising above the clouds before you know it.
What day of the week has the most flights from GRR to ISP?
You'll usually find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can change from season to season and during peak travel times or public holidays.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Gerald R. Ford Intl. Airport (GRR) to MacArthur Airport (ISP)?
To reach MacArthur Airport (ISP) on schedule, choose a flight that takes off from Gerald R. Ford Intl. Airport (GRR) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this hour.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for Islip from Gerald R. Ford Intl. Airport (GRR)?
If you're boarding a direct flight from Gerald R. Ford Intl. Airport (GRR) to Islip, LaGuardia Airport (LGA) is the only airport you can touch down at.
Is it cheaper to buy a plane ticket from Gerald R. Ford Intl. Airport (GRR) to MacArthur Airport (ISP) last-minute?
Waiting until just before your departure to book a ticket from GRR to ISP generally means paying more. While it's possible to find some last-minute discounts, they're not always guaranteed. Be flexible with your itinerary to maximize your chances of getting a bargain.
Is it cheaper to book a GRR to ISP flight and hotel package?
You can save money by securing a GRR to ISP flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's simple to manage it all in one place. After selecting your ideal accommodations and flights, consider adding extras such as car rentals, activities and tours.
Can I cancel or change the date of my flight from Gerald R. Ford Intl. Airport (GRR) to MacArthur Airport (ISP)?
If you reserved your GRR to ISP flight in the last 24 hours, you may be able to modify or cancel it without fees. Depending on the airline and the type of ticket you purchased, additional charges may apply for changes beyond that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, go to our Customer Service portal for more information.

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*Available to One Key members.