$111 Cheap Flights from Islip (ISP) to Grand Rapids (GRR)

View $111 flight on Wed, Jul 9, 2025Opens in a new window

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

  • Plan, book, fly with confidence

  • trending down icon
    Be in the know
    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon
    Book smarter
    Save up to 30% on select hotels after you book a flight*
  • one key icon
    Earn twice
    Earn your airline miles on top of our OneKeyCash
    Learn about One Key

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

Prices were available within the past 7 days and start at $111 for one-way flights and $218 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Sat, Sep 27 - Mon, Oct 13
ISP
Islip
GRR
Grand Rapids
$218 Roundtrip, found 5 days ago
$218
Roundtrip
found 5 days ago
Select Frontier Airlines flight, departing Sat, Sep 27 from Islip to Grand Rapids, returning Mon, Oct 13, priced at $218 found 5 days ago
Frontier Airlines
Wed, Jun 18 - Thu, Jun 26
ISP
Islip
GRR
Grand Rapids
$239 Roundtrip, found 8 hours ago
$239
Roundtrip
found 8 hours ago
Select Frontier Airlines flight, departing Wed, Jun 18 from Islip to Grand Rapids, returning Thu, Jun 26, priced at $239 found 8 hours ago
Frontier Airlines
Fri, Jun 20 - Thu, Jun 26
ISP
Islip
GRR
Grand Rapids
$249 Roundtrip, found 8 hours ago
$249
Roundtrip
found 8 hours ago
Select Frontier Airlines flight, departing Fri, Jun 20 from Islip to Grand Rapids, returning Thu, Jun 26, priced at $249 found 8 hours ago
Frontier Airlines
Sun, Sep 28 - Mon, Oct 13
ISP
Islip
GRR
Grand Rapids
$292 Roundtrip, found 5 days ago
$292
Roundtrip
found 5 days ago
Select Frontier Airlines flight, departing Sun, Sep 28 from Islip to Grand Rapids, returning Mon, Oct 13, priced at $292 found 5 days ago
Southwest Airlines
Sat, Jul 5 - Fri, Jul 11
ISP
Islip
GRR
Grand Rapids
$296 Roundtrip, found 2 days ago
$296
Roundtrip
found 2 days ago
Select Southwest Airlines flight, departing Sat, Jul 5 from Islip to Grand Rapids, returning Fri, Jul 11, priced at $296 found 2 days ago
Southwest Airlines
Mon, Jul 21 - Fri, Jul 25
ISP
Islip
GRR
Grand Rapids
$301 Roundtrip, found 5 days ago
$301
Roundtrip
found 5 days ago
Select Southwest Airlines flight, departing Mon, Jul 21 from Islip to Grand Rapids, returning Fri, Jul 25, priced at $301 found 5 days ago
Southwest Airlines
Mon, Jul 21 - Thu, Jul 24
ISP
Islip
GRR
Grand Rapids
$302 Roundtrip, found 5 days ago
$302
Roundtrip
found 5 days ago
Select Southwest Airlines flight, departing Mon, Jul 21 from Islip to Grand Rapids, returning Thu, Jul 24, priced at $302 found 5 days ago
Southwest Airlines
Mon, Jul 21 - Thu, Jul 24
ISP
Islip
GRR
Grand Rapids
$305 Roundtrip, found 5 days ago
$305
Roundtrip
found 5 days ago
Select Southwest Airlines flight, departing Mon, Jul 21 from Islip to Grand Rapids, returning Thu, Jul 24, priced at $305 found 5 days ago
Southwest Airlines
Tue, Jul 8 - Sat, Jul 12
ISP
Islip
GRR
Grand Rapids
$307 Roundtrip, found 5 days ago
$307
Roundtrip
found 5 days ago
Select Southwest Airlines flight, departing Tue, Jul 8 from Islip to Grand Rapids, returning Sat, Jul 12, priced at $307 found 5 days ago
Southwest Airlines
Sat, Jul 5 - Tue, Jul 8
ISP
Islip
GRR
Grand Rapids
$312 Roundtrip, found 2 days ago
$312
Roundtrip
found 2 days ago
Select Southwest Airlines flight, departing Sat, Jul 5 from Islip to Grand Rapids, returning Tue, Jul 8, priced at $312 found 2 days ago
Flights from Islip (ISP) to Grand Rapids (GRR)
Origin airport
MacArthur
Destination airport
Gerald R. Ford Intl.
Airlines serving
Frontier Airlines, Southwest Airlines
Roundtrip price
$218
Distance
655 mi

Islip to Grand Rapids Flights

The cheapest times to fly from Islip to Grand Rapids

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 Islip to Grand Rapids are during the month of September. You can find some of the cheapest flights from Islip to Grand Rapids with Expedia's search tool and vast selection of airlines.

 

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

Sunday is one of the best days to book for cheap flights from Islip to Grand Rapids: 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 Islip to Grand Rapids

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 Islip to Grand Rapids in 2025. You can also book with separate airlines for your outbound and return journeys, from $111 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 Islip to Grand Rapids 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 Islip to Grand Rapids 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 MacArthur Airport (ISP) to Gerald R. Ford Intl. Airport (GRR) cost?
Discover the latest flight deals from ISP to GRR 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 ISP to GRR?
The cheapest flights from ISP to GRR 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 ISP to GRR?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that’ll take you from ISP to GRR. Sort your results by “Price (lowest to highest)” to snap up a great deal.
How many flights per day from MacArthur Airport (ISP) to Gerald R. Ford Intl. Airport (GRR)?
There aren’t any daily nonstop flights available from MacArthur Airport (ISP) to Gerald R. Ford Intl. Airport (GRR). But you can book 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 ISP to GRR?
Friday is generally the busiest day for flights, while Tuesday is often the quietest.* Remember that flight schedules can change based on a number of factors, such as the time of year and airline.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from MacArthur Airport (ISP) to Gerald R. Ford Intl. Airport (GRR)?
To avoid potential delays on the MacArthur Airport (ISP) to Gerald R. Ford Intl. Airport (GRR) route, travel before 3 PM. Flights after this time have a 22% higher chance of being canceled.**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.
Is it cheaper to buy a plane ticket from MacArthur Airport (ISP) to Gerald R. Ford Intl. Airport (GRR) last-minute?
Last-minute bookings from ISP to GRR are usually more expensive. To secure the best rates, start searching for flights early. That being said, if you’re flexible with your travel plans, you may score a cheap fare just before your departure.
Is it cheaper to book an ISP to GRR flight and hotel package?
Opting for an ISP to GRR flight and hotel package is typically cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your trip all in one place. Choose from our impressive range of accommodations and then add flights, car rentals and activities to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from MacArthur Airport (ISP) to Gerald R. Ford Intl. Airport (GRR)?
If you reserved your ISP to GRR flight within the last 24 hours, you may be able to cancel or modify it without fees. Depending on the airline and the type of ticket you purchased, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal for more details.

Explore a world of travel with Expedia

*Available to One Key members.