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Islip

$291+ Cheap flights from Grand Rapids to Islip (GRR - 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 12/13. Fares are subject to change and may not be available on all flights or dates of travel.
GRR — ISP
out 11 — out 181
sáb 10/11
sáb 10/18
1 adult, Economy
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Cheap 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 setembro 11, 2025.

Round-trip from

$291
(Southwest)

Popular in

December

Cheapest in

July

Average price

$259
From Grand Rapids Gerald R. Ford Intl to Islip Long Island
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($49 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($9 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find 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 setembro 11, 2025.

This Southwest deal was found by Cheapflights users on 9/11. 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.
sáb 12/131:40 pmGRR - ISP
1 stop8h 05mSouthwest
seg 12/221:35 pmISP - GRR
2 stops10h 50mSouthwest
Deal found 9/11$291
This Southwest deal was found by Cheapflights users on 9/9. 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.
seg 12/221:30 pmGRR - ISP
1 stop3h 45mSouthwest
sex 12/265:40 amISP - GRR
1 stop8h 15mSouthwest
Deal found 9/9$388
This Frontier deal was found by Cheapflights users on 9/11. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
seg 12/229:52 amGRR - ISP
1 stop10h 22mFrontier
sex 12/269:09 pmISP - GRR
1 stop11h 48mFrontier
Deal found 9/11$666

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 setembro 11, 2025.
Use the filters below to find and compare flights from Grand Rapids to Islip that are best for you.

Fly from

Grand Rapids

Fly to

Islip

Route

Depart

Return

Price

Grand RapidsIslip

GRR - ISP

GRRISP

Grand Rapids Gerald R. Ford Intl

sáb 12/13

1:40 pm-9:45 pm

1 stop8h 05m

Islip Long Island

seg 12/22

1:35 pm-12:25 am

2 stops10h 50m

$291

Grand RapidsIslip

GRR - ISP

GRRISP

Grand Rapids Gerald R. Ford Intl

seg 12/22

1:30 pm-5:15 pm

1 stop3h 45m

Islip Long Island

sex 12/26

5:40 am-1:55 pm

1 stop8h 15m

$388

Grand RapidsIslip

GRR - ISP

GRRISP

Grand Rapids Gerald R. Ford Intl

seg 12/22

9:52 am-8:14 pm

1 stop10h 22m

Islip Long Island

sex 12/26

9:09 pm-8:57 am

1 stop11h 48m

$666

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/11

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?

Currently, January is the cheapest month in which you can book a flight from Grand Rapids to Islip (average of $108). Flying from Grand Rapids to Islip in November is currently the most expensive (average of $213). 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?

    For as low as $291, Southwest can have you in Islip from Grand Rapids in 8h 05m. The distance between Grand Rapids and Islip 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?

    Currently, January is the cheapest month in which you can book a flight from Grand Rapids to Islip (average of $108). Flying from Grand Rapids to Islip in November is currently the most expensive (average of $213). 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
Southampton

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