$122+ Cheap flights from Islip, NY to Grand Rapids (ISP - GRR)
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 9/11. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — GRR
Sep 7 — Sep 141
Round-trip
1 adult, Economy
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Find cheap flights from Islip to Grand Rapids with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Islip to Grand Rapids
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Best
Last-minute
One-way
Cheapest flights from Islip to Grand RapidsExplore the most affordable flight options available from Islip to Grand Rapids. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 8, 2026.
Explore the most affordable flight options available from Islip to Grand Rapids. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 8, 2026.
This Frontier deal was found by Cheapflights users on 8/7. 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.
Fri 9/410:57 am -
1 stop9h 31m
Mon 9/79:33 pm -
1 stop12h 20m
Deal found 8/7![Frontier logo]()
$211
This Southwest deal was found by Cheapflights users on 8/4. 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 9/16:05 am -
1 stop6h 55m
Mon 9/75:45 am -
1 stop6h 50m
Deal found 8/4![Southwest logo]()
$263
This Southwest deal was found by Cheapflights users on 8/3. 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.
Sat 9/1911:55 am -
2 stops8h 20m
Mon 9/215:45 am -
1 stop3h 55m
Deal found 8/3![Southwest logo]()
$306
This Kiwi.com deal was found by Cheapflights users on 8/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/277:09 pm -
1 stop25h 19m
Mon 8/319:13 pm -
1 stop12h 40m
Deal found 8/7![Frontier logo]()
$308
This Frontier deal was found by Cheapflights users on 8/6. 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.
Wed 8/1910:57 am -
1 stop9h 31m
Fri 8/219:13 pm -
1 stop12h 40m
Deal found 8/6![Frontier logo]()
$324
This Kiwi.com deal was found by Cheapflights users on 8/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/277:09 pm -
1 stop25h 19m
Mon 8/319:13 pm -
2 stops19h 34m
Deal found 8/7![Multiple Airlines logo]()
$325
This Kiwi.com deal was found by Cheapflights users on 8/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/135:43 pm -
1 stop22h 58m
Fri 9/258:00 am -
2 stops27h 20m
Deal found 8/3![Multiple Airlines logo]()
$333
This Southwest deal was found by Cheapflights users on 8/3. 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.
Sun 9/1310:20 am -
1 stop3h 45m
Fri 9/253:30 pm -
1 stop6h 40m
Deal found 8/3![Southwest logo]()
$354
This Southwest deal was found by Cheapflights users on 8/5. 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 11/66:00 am -
1 stop9h 30m
Sun 11/84:05 pm -
1 stop6h 40m
Deal found 8/5![Southwest logo]()
$362
This Southwest deal was found by Cheapflights users on 8/7. 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 8/284:05 pm -
1 stop3h 50m
Sun 8/306:00 am -
1 stop3h 55m
Deal found 8/7![Southwest logo]()
$367
Best flights from Islip to Grand RapidsDiscover carefully curated flight deals from Islip to Grand Rapids that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 8, 2026.
Discover carefully curated flight deals from Islip to Grand Rapids that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 8, 2026.
This Frontier deal was found by Cheapflights users on 8/6. 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.
Fri 9/410:57 am -
1 stop9h 31m
Mon 9/79:33 pm -
1 stop12h 20m
Deal found 8/6![Frontier logo]()
$211
This Southwest deal was found by Cheapflights users on 8/3. 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.
Sat 9/195:30 am -
1 stop5h 50m
Mon 9/215:45 am -
1 stop3h 55m
Deal found 8/3![Southwest logo]()
$263
This Southwest deal was found by Cheapflights users on 8/4. 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 9/16:05 am -
1 stop6h 55m
Mon 9/75:45 am -
1 stop6h 50m
Deal found 8/4![Southwest logo]()
$263
This Kiwi.com deal was found by Cheapflights users on 8/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/277:09 pm -
1 stop25h 19m
Mon 8/319:13 pm -
1 stop12h 40m
Deal found 8/7![Frontier logo]()
$308
This Southwest deal was found by Cheapflights users on 8/3. 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.
Sun 9/1310:20 am -
1 stop3h 45m
Fri 9/253:30 pm -
1 stop6h 40m
Deal found 8/3![Southwest logo]()
$354
This Southwest deal was found by Cheapflights users on 8/5. 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 11/66:00 am -
1 stop9h 30m
Sun 11/84:05 pm -
1 stop6h 40m
Deal found 8/5![Southwest logo]()
$362
This Southwest deal was found by Cheapflights users on 8/7. 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.
Thu 8/276:10 am -
1 stop7h 25m
Sun 8/306:00 am -
1 stop3h 55m
Deal found 8/7![Southwest logo]()
$472
Last-minute flights from Islip to Grand RapidsDiscover last-minute flight deals from Islip to Grand Rapids. Data last updated August 8, 2026 and is based on user searches.
Discover last-minute flight deals from Islip to Grand Rapids. Data last updated August 8, 2026 and is based on user searches.
This Frontier deal was found by Cheapflights users on 8/6. 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.
Wed 8/1910:57 am -
1 stop9h 31m
Fri 8/219:13 pm -
1 stop12h 40m
Deal found 8/6![Frontier logo]()
$324
This Kiwi.com deal was found by Cheapflights users on 8/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/277:09 pm -
1 stop25h 19m
Mon 8/319:13 pm -
1 stop12h 40m
Deal found 8/7![Frontier logo]()
$308
This Kiwi.com deal was found by Cheapflights users on 8/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/277:09 pm -
1 stop25h 19m
Mon 8/319:13 pm -
2 stops19h 34m
Deal found 8/7![Multiple Airlines logo]()
$325
This Southwest deal was found by Cheapflights users on 8/7. 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 8/284:05 pm -
1 stop3h 50m
Sun 8/306:00 am -
1 stop3h 55m
Deal found 8/7![Southwest logo]()
$367
This Southwest deal was found by Cheapflights users on 8/4. 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 9/16:05 am -
1 stop6h 55m
Mon 9/75:45 am -
1 stop6h 50m
Deal found 8/4![Southwest logo]()
$263
This Frontier deal was found by Cheapflights users on 8/7. 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.
Fri 9/410:57 am -
1 stop9h 31m
Mon 9/79:33 pm -
1 stop12h 20m
Deal found 8/7![Frontier logo]()
$211
This Kiwi.com deal was found by Cheapflights users on 8/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/135:43 pm -
1 stop22h 58m
Fri 9/258:00 am -
2 stops27h 20m
Deal found 8/3![Multiple Airlines logo]()
$333
This Southwest deal was found by Cheapflights users on 8/3. 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.
Sun 9/1310:20 am -
1 stop3h 45m
Fri 9/253:30 pm -
1 stop6h 40m
Deal found 8/3![Southwest logo]()
$354
This Southwest deal was found by Cheapflights users on 8/3. 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.
Sat 9/1911:55 am -
2 stops8h 20m
Mon 9/215:45 am -
1 stop3h 55m
Deal found 8/3![Southwest logo]()
$306
One-way flights from Islip to Grand RapidsSearch for one-way flight options from Islip to Grand Rapids. Find affordable one-way fares based on user searches. Data last updated August 8, 2026.
Search for one-way flight options from Islip to Grand Rapids. Find affordable one-way fares based on user searches. Data last updated August 8, 2026.
This Southwest deal was found by Cheapflights users on 8/7. 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 9/114:05 pm -
1 stop3h 55m
Deal found 8/7![Southwest logo]()
$122
This Southwest deal was found by Cheapflights users on 8/7. 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.
Thu 9/104:05 pm -
1 stop3h 55m
Deal found 8/7![Southwest logo]()
$132
This Kiwi.com deal was found by Cheapflights users on 8/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/105:43 pm -
2 stops26h 35m
Deal found 8/7![Multiple Airlines logo]()
$173
This Kiwi.com deal was found by Cheapflights users on 8/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1111:52 am -
3 stops27h 34m
Deal found 8/7![Multiple Airlines logo]()
$246
Find flight deals from Islip to Grand Rapids
Discover tips and strategies to find the most affordable flight options for your journey from Islip (ISP) to Grand Rapids (GRR). 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 August 8, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $211 (Frontier) |
One-way from | $122 (Southwest) |
Popular in | January |
Cheapest in | October |
Average price | $363 |
Cheapflights Fare Finder
Customize your flight search to find flights from Islip to Grand Rapids 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 August 8, 2026.
Use the filters below to find and compare flights from Islip to Grand Rapids that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
IslipGrand Rapids
ISP Islip Long Island - GRR Grand Rapids Gerald R. Ford Intl
ISPGRR
Islip Long Island
Fri 9/4
10:57 am-8:28 pm
1 stop9h 31m
Grand Rapids Gerald R. Ford Intl
Mon 9/7
9:33 pm-9:53 am
1 stop12h 20m
$211
Quickest round-trip
IslipGrand Rapids
ISP Islip Long Island - GRR Grand Rapids Gerald R. Ford Intl
ISPGRR
Islip Long Island
Sat 9/19
5:30 am-11:20 am
1 stop5h 50m
Grand Rapids Gerald R. Ford Intl
Mon 9/21
5:45 am-9:40 am
1 stop3h 55m
$263
IslipGrand Rapids
ISP Islip Long Island - GRR Grand Rapids Gerald R. Ford Intl
ISPGRR
Islip Long Island
Tue 9/1
6:05 am-1:00 pm
1 stop6h 55m
Grand Rapids Gerald R. Ford Intl
Mon 9/7
5:45 am-12:35 pm
1 stop6h 50m
$263
IslipGrand Rapids
ISP Islip Long Island - GRR Grand Rapids Gerald R. Ford Intl
ISPGRR
Islip Long Island
Thu 8/27
7:09 pm-8:28 pm
1 stop25h 19m
Grand Rapids Gerald R. Ford Intl
Mon 8/31
9:13 pm-9:53 am
1 stop12h 40m
$308
IslipGrand Rapids
ISP Islip Long Island - GRR Grand Rapids Gerald R. Ford Intl
ISPGRR
Islip Long Island
Sun 9/13
10:20 am-2:05 pm
1 stop3h 45m
Grand Rapids Gerald R. Ford Intl
Fri 9/25
3:30 pm-10:10 pm
1 stop6h 40m
$354
IslipGrand Rapids
ISP Islip Long Island - GRR Grand Rapids Gerald R. Ford Intl
ISPGRR
Islip Long Island
Fri 11/6
6:00 am-3:30 pm
1 stop9h 30m
Grand Rapids Gerald R. Ford Intl
Sun 11/8
4:05 pm-10:45 pm
1 stop6h 40m
$362
IslipGrand Rapids
ISP Islip Long Island - GRR Grand Rapids Gerald R. Ford Intl
ISPGRR
Islip Long Island
Thu 8/27
6:10 am-1:35 pm
1 stop7h 25m
Grand Rapids Gerald R. Ford Intl
Sun 8/30
6:00 am-9:55 am
1 stop3h 55m
$472
Cheapest one-way
Quickest one-way
IslipGrand Rapids
ISP Islip Long Island - GRR Grand Rapids Gerald R. Ford Intl
ISPGRR
Islip Long Island
Fri 9/11
4:05 pm-8:00 pm
1 stop3h 55m
$122
IslipGrand Rapids
ISP Islip Long Island - GRR Grand Rapids Gerald R. Ford Intl
ISPGRR
Islip Long Island
Thu 9/10
4:05 pm-8:00 pm
1 stop3h 55m
$132
IslipGrand Rapids
ISP Islip Long Island - GRR Grand Rapids Gerald R. Ford Intl
ISPGRR
Islip Long Island
Thu 9/10
5:43 pm-8:18 pm
2 stops26h 35m
$173
Sorted by cheapest first
Compare providers for flights from Islip to Grand Rapids
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Islip to Grand Rapids in August.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Islip, New York-Grand Rapids flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Islip, New York-Grand Rapids flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Islip, New York-Grand Rapids flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Islip, New York-Grand Rapids 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 Islip, New York-Grand Rapids 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 Islip to Grand Rapids
Have a flexible travel schedule? Discover the best time to fly to Grand Rapids from Islip with our price prediction graph.
ISP-GRR
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.
Related info for your journey
Find useful and relevant information for your journey from Islip to Grand Rapids. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Grand Rapids?
Book flights to Grand Rapids if you plan to visit one of these locationsHolland
Wyoming
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