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$206+ Cheap flights from Grand Rapids to Islip, NY (GRR - ISP)

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 7/19. Fares are subject to change and may not be available on all flights or dates of travel.
GRR — ISP
Apr 22 — Apr 291
Wed 4/22
Wed 4/29
1 adult, Economy
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Cheap flight deals from Grand Rapids to Islip

Cheapest flights from Grand Rapids to Islip
Explore the most affordable flight options available from Grand Rapids to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 23, 2026.

This Southwest deal was found by Cheapflights users on 3/22. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/28:10 am
GRR
-
ISP
1 stop5h 40m
Southwest
Tue 6/169:00 am
ISP
-
GRR
1 stop4h 10m
Southwest
Deal found 3/22$249
This Southwest deal was found by Cheapflights users on 3/18. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/178:25 am
GRR
-
ISP
1 stop8h 05m
Southwest
Sun 4/196:05 am
ISP
-
GRR
1 stop6h 45m
Southwest
Deal found 3/18$326
This Southwest deal was found by Cheapflights users on 3/21. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/165:35 am
GRR
-
ISP
1 stop6h 25m
Southwest
Mon 10/196:00 am
ISP
-
GRR
1 stop6h 40m
Southwest
Deal found 3/21$337
This Southwest deal was found by Cheapflights users on 3/22. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/151:55 pm
GRR
-
ISP
1 stop8h 40m
Southwest
Sun 7/196:00 am
ISP
-
GRR
1 stop10h 10m
Southwest
Deal found 3/22$381
This Southwest deal was found by Cheapflights users on 3/19. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/295:25 am
GRR
-
ISP
1 stop6h 25m
Southwest
Fri 7/35:20 am
ISP
-
GRR
2 stops8h 45m
Southwest
Deal found 3/19$398

Find flight deals from Grand Rapids to Islip

Discover tips and strategies to find the most affordable flight options for your journey from Grand Rapids (GRR) 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 March 23, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$249
(Southwest)

One-way from

$206
(Southwest)

Popular in

December

Cheapest in

August

Average price

$318
Provider with most accurate pricing for Grand Rapids Gerald R. Ford Intl-Islip Long Island flight deals.
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Provider most trusted by Cheapflights users for Grand Rapids Gerald R. Ford Intl-Islip Long Island flights.
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From Grand Rapids Gerald R. Ford Intl to Islip Long Island
Search Deals
One-way flight from Grand Rapids Gerald R. Ford Intl to Islip Long Island
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($33 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
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Average for round-trip flights in March 2026
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Grand Rapids 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 2,558,603 searches. Data last updated March 23, 2026.
Use the filters below to find and compare flights from Grand Rapids to Islip that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

Grand RapidsIslip

GRR - ISP

GRRISP

Grand Rapids Gerald R. Ford Intl

Tue 6/2

8:10 am-1:50 pm

1 stop5h 40m

Islip Long Island

Tue 6/16

9:00 am-1:10 pm

1 stop4h 10m

$249

Grand RapidsIslip

GRR - ISP

GRRISP

Grand Rapids Gerald R. Ford Intl

Fri 4/17

8:25 am-4:30 pm

1 stop8h 05m

Islip Long Island

Sun 4/19

6:05 am-12:50 pm

1 stop6h 45m

$326

Grand RapidsIslip

GRR - ISP

GRRISP

Grand Rapids Gerald R. Ford Intl

Wed 7/15

1:55 pm-10:35 pm

1 stop8h 40m

Islip Long Island

Sun 7/19

6:00 am-4:10 pm

1 stop10h 10m

$381

Grand RapidsIslip

GRR - ISP

GRRISP

Grand Rapids Gerald R. Ford Intl

Mon 6/29

5:25 am-11:50 am

1 stop6h 25m

Islip Long Island

Fri 7/3

5:20 am-2:05 pm

2 stops8h 45m

$398

Grand RapidsIslip

GRR - ISP

GRRISP

Grand Rapids Gerald R. Ford Intl

Fri 7/17

5:25 am-11:50 am

1 stop6h 25m

Islip Long Island

Fri 7/17

3:05 pm-12:15 am

1 stop9h 10m

$449
Cheapest one-way
Quickest one-way

Grand RapidsIslip

GRR - ISP

GRRISP

Grand Rapids Gerald R. Ford Intl

Sun 7/19

5:30 am-11:45 am

1 stop6h 15m

$206

Grand RapidsIslip

GRR - ISP

GRRISP

Grand Rapids Gerald R. Ford Intl

Sun 6/21

5:30 am-11:45 am

1 stop6h 15m

$284

Grand RapidsIslip

GRR - ISP

GRRISP

Grand Rapids Gerald R. Ford Intl

Sun 7/19

8:00 am-1:28 pm

3 stops29h 28m

$348

Grand RapidsIslip

GRR - ISP

GRRISP

Grand Rapids Gerald R. Ford Intl

Sun 6/21

5:31 pm-8:03 pm

3 stops26h 32m

$349

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/19

Sorted by cheapest first
  • Most accurate provider: When it comes to deals on Grand Rapids-Islip, New York flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Grand Rapids-Islip, New York flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Grand Rapids-Islip, New York flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Grand Rapids-Islip, New York flights, Cheapflights users trust FlightHub the most. FlightHub 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 Grand Rapids-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 Grand Rapids to Islip

Have a flexible travel schedule? Discover the best time to fly to Islip from Grand Rapids 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.

Cheapflights Insights

Everything you need to know about your flight from Grand Rapids to Islip

What is the cheapest month to book a flight from Grand Rapids to Islip, New York?

Currently, July is the cheapest month in which you can book a flight from Grand Rapids to Islip, New York (average of $98). Flying from Grand Rapids to Islip, New York in November is currently the most expensive (average of $232). 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.

Related info for your journey

Find useful and relevant information for your journey from Grand Rapids to Islip. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Grand Rapids to Islip, New York?

    A quick flight from Grand Rapids to Islip, New York can take about 5h 40m. Southwest provides one of the quickest options available for as low as $249. The distance between Grand Rapids and Islip, New York is about 655 mi.

  • Can I find deals for flights from Grand Rapids to Islip that include hotel bookings?

    Yes. In addition to deals on Grand Rapids to Islip flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Grand Rapids to Islip?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Grand Rapids to Islip.

  • Can I find deals for business class flights from Grand Rapids to Islip?

    Yes. Cheapflights offers flight deals from Grand Rapids to Islip by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Grand Rapids to Islip, New York?

    Currently, July is the cheapest month in which you can book a flight from Grand Rapids to Islip, New York (average of $98). Flying from Grand Rapids to Islip, New York in November is currently the most expensive (average of $232). 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

Traveling to a place near Islip?

Book flights to Islip if you plan to visit one of these locations
Riverhead

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