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Islip

$115+ 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 8/14. Fares are subject to change and may not be available on all flights or dates of travel.
GRR — ISP
ago 3 — ago 101
dom 8/3
dom 8/10
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 julho 29, 2025.

Popular in

December

Cheapest in

September

Average price

$253
Highest demand for flights based on searches. 15% potential increase in price ($52 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($10 potential savings vs. average RT price).
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Average for round-trip flights in July 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 julho 29, 2025.

This Southwest deal was found by Cheapflights users on 7/28. 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 8/211:55 amGRR - ISP
1 stop5h 20mSouthwest
qui 8/73:05 pmISP - GRR
2 stops8h 05mSouthwest
Deal found 7/28$638
This Mytrip deal was found by Cheapflights users on 7/28. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb 8/29:06 pmGRR - ISP
3 stops36h 50mMultiple Airlines
qui 8/77:39 pmISP - GRR
2 stops25h 56mMultiple Airlines
Deal found 7/28$1,117

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 julho 29, 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

qui 8/14

10:53 am-11:47 pm

1 stop12h 54m

$115

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

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, January is the cheapest month in which you can book a flight from Grand Rapids to Islip, New York (average of $108). Flying from Grand Rapids to Islip, New York 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.

Reviews of airlines servicing Islip

Get insights into the airlines that provide service to Islip. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Islip. Reviews last updated julho 29, 2025.
Read reviews from past customers who have flown Frontier from Grand Rapids to Islip. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Frontier
5.9
Fair
3,238 reviews

Comfort

5.6

Boarding

6.1

Overall

5.9

Entertainment

4.5

Food

4.7

Crew

6.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Jun 2025

TTN - TPA

TTN is a small airport for Frontier. Drop off is easy as is parking. The location is remote so there is zero traffic. The place could use a renovation but for the price you pay it is not necessary. Good-Staff is very friendly. Flight left on time. Bad- run down, deplaning/boarding on the tarmac. I got wet on the stairs outside of the plane while waiting to board.
Frontier
5.9
Fair
3,238 reviews
Frontier
5.9
Fair
3,238 reviews

Comfort

5.6

Boarding

6.1

Overall

5.9

Entertainment

4.5

Food

4.7

Crew

6.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Jun 2025

TTN - TPA

TTN is a small airport for Frontier. Drop off is easy as is parking. The location is remote so there is zero traffic. The place could use a renovation but for the price you pay it is not necessary. Good-Staff is very friendly. Flight left on time. Bad- run down, deplaning/boarding on the tarmac. I got wet on the stairs outside of the plane while waiting to board.

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.

  • 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, January is the cheapest month in which you can book a flight from Grand Rapids to Islip, New York (average of $108). Flying from Grand Rapids to Islip, New York 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
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