$139+ 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 8/19. Fares are subject to change and may not be available on all flights or dates of travel.
GRR — ISP
Sep 7 — Sep 141
Round-trip
1 adult, Economy
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Find cheap flights from Grand Rapids to Islip 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 Grand Rapids to Islip
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Best
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One-way
Cheapest flights from Grand Rapids to IslipExplore 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 August 8, 2026.
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 August 8, 2026.
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/69:13 pm -
1 stop12h 40m
Mon 9/710:57 am -
1 stop9h 41m
Deal found 8/6![Frontier logo]()
$199
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.
Tue 9/18:20 am -
1 stop3h 50m
Thu 9/104:05 pm -
1 stop3h 55m
Deal found 8/7![Southwest logo]()
$263
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/199:13 pm -
1 stop12h 40m
Sun 8/2310:57 am -
1 stop9h 31m
Deal found 8/4![Frontier logo]()
$266
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.
Sat 10/35:35 am -
1 stop6h 20m
Mon 10/53:10 pm -
2 stops8h 30m
Deal found 8/5![Southwest logo]()
$268
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.
Mon 8/319:13 pm -
1 stop12h 40m
Thu 9/105:43 pm -
1 stop22h 58m
Deal found 8/7![Frontier logo]()
$279
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.
Wed 9/29:13 pm -
1 stop21h 01m
Thu 9/105:43 pm -
1 stop22h 58m
Deal found 8/7![Frontier logo]()
$295
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.
Mon 8/319:13 pm -
1 stop12h 40m
Thu 9/105:43 pm -
2 stops19h 03m
Deal found 8/7![Multiple Airlines logo]()
$314
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.
Wed 9/29:13 pm -
1 stop21h 01m
Thu 9/105:43 pm -
2 stops19h 03m
Deal found 8/7![Multiple Airlines logo]()
$330
Best flights from Grand Rapids to IslipDiscover carefully curated flight deals from Grand Rapids to Islip 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 Grand Rapids to Islip that have cost, travel time, and layovers in mind to ensure you get the best travel experience. 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.
Tue 9/18:20 am -
1 stop3h 50m
Thu 9/104:05 pm -
1 stop3h 55m
Deal found 8/7![Southwest logo]()
$263
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/199:13 pm -
1 stop12h 40m
Sun 8/2310:57 am -
1 stop9h 31m
Deal found 8/4![Frontier logo]()
$266
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.
Sun 8/308:30 am -
1 stop25h 23m
Thu 9/105:43 pm -
2 stops19h 03m
Deal found 8/7![Multiple Airlines logo]()
$383
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.
Sat 10/35:35 am -
1 stop6h 20m
Mon 10/53:10 pm -
2 stops8h 30m
Deal found 8/5![Southwest logo]()
$268
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/245:45 am -
1 stop3h 55m
Tue 8/256:05 am -
1 stop6h 55m
Deal found 8/6![Southwest logo]()
$405
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/67:50 am -
2 stops8h 45m
Mon 9/76:10 am -
1 stop7h 25m
Deal found 8/6![Southwest logo]()
$458
Last-minute flights from Grand Rapids to IslipDiscover last-minute flight deals from Grand Rapids to Islip. Data last updated August 8, 2026 and is based on user searches.
Discover last-minute flight deals from Grand Rapids to Islip. Data last updated August 8, 2026 and is based on user searches.
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/199:13 pm -
1 stop12h 40m
Sun 8/2310:57 am -
1 stop9h 31m
Deal found 8/4![Frontier logo]()
$266
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.
Sun 8/308:30 am -
1 stop25h 23m
Thu 9/105:43 pm -
1 stop22h 58m
Deal found 8/7![Multiple Airlines logo]()
$348
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.
Mon 8/319:13 pm -
1 stop12h 40m
Thu 9/105:43 pm -
1 stop22h 58m
Deal found 8/7![Frontier logo]()
$279
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.
Mon 8/319:13 pm -
1 stop12h 40m
Thu 9/105:43 pm -
2 stops19h 03m
Deal found 8/7![Multiple Airlines logo]()
$314
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.
Tue 9/18:20 am -
1 stop3h 50m
Thu 9/104:05 pm -
1 stop3h 55m
Deal found 8/7![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.
Wed 9/29:13 pm -
1 stop21h 01m
Thu 9/105:43 pm -
1 stop22h 58m
Deal found 8/7![Frontier logo]()
$295
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.
Wed 9/29:13 pm -
1 stop21h 01m
Thu 9/105:43 pm -
2 stops19h 03m
Deal found 8/7![Multiple Airlines logo]()
$330
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/69:13 pm -
1 stop12h 40m
Mon 9/710:57 am -
1 stop9h 41m
Deal found 8/6![Frontier logo]()
$199
One-way flights from Grand Rapids to IslipSearch for one-way flight options from Grand Rapids to Islip. Find affordable one-way fares based on user searches. Data last updated August 8, 2026.
Search for one-way flight options from Grand Rapids to Islip. Find affordable one-way fares based on user searches. Data last updated August 8, 2026.
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/199:13 pm -
1 stop12h 40m
Deal found 8/4![Frontier logo]()
$139
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.
Sun 9/134:31 pm -
2 stops24h 27m
Deal found 8/7![Multiple Airlines logo]()
$201
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/205:45 am -
1 stop3h 55m
Deal found 8/6![Southwest logo]()
$203
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/204:24 pm -
2 stops41h 29m
Deal found 8/6![Multiple Airlines logo]()
$264
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/2012:05 pm -
1 stop7h 01m
Deal found 8/4![Frontier logo]()
$419
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 August 8, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $199 (Expedia) |
One-way from | $88 (Frontier) |
Popular in | December |
Cheapest in | January |
Average price | $322 |
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 August 8, 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
Cheapest round-trip
Quickest round-trip
Grand RapidsIslip
GRR Grand Rapids Gerald R. Ford Intl - ISP Islip Long Island
GRRISP
Grand Rapids Gerald R. Ford Intl
Tue 9/1
8:20 am-12:10 pm
1 stop3h 50m
Islip Long Island
Thu 9/10
4:05 pm-8:00 pm
1 stop3h 55m
$263
Grand RapidsIslip
GRR Grand Rapids Gerald R. Ford Intl - ISP Islip Long Island
GRRISP
Grand Rapids Gerald R. Ford Intl
Wed 8/19
9:13 pm-9:53 am
1 stop12h 40m
Islip Long Island
Sun 8/23
10:57 am-8:28 pm
1 stop9h 31m
$266
Grand RapidsIslip
GRR Grand Rapids Gerald R. Ford Intl - ISP Islip Long Island
GRRISP
Grand Rapids Gerald R. Ford Intl
Sat 10/3
5:35 am-11:55 am
1 stop6h 20m
Islip Long Island
Mon 10/5
3:10 pm-11:40 pm
2 stops8h 30m
$268
Grand RapidsIslip
GRR Grand Rapids Gerald R. Ford Intl - ISP Islip Long Island
GRRISP
Grand Rapids Gerald R. Ford Intl
Sun 8/30
8:30 am-9:53 am
1 stop25h 23m
Islip Long Island
Thu 9/10
5:43 pm-12:46 pm
2 stops19h 03m
$383
Grand RapidsIslip
GRR Grand Rapids Gerald R. Ford Intl - ISP Islip Long Island
GRRISP
Grand Rapids Gerald R. Ford Intl
Mon 8/24
5:45 am-9:40 am
1 stop3h 55m
Islip Long Island
Tue 8/25
6:05 am-1:00 pm
1 stop6h 55m
$405
Grand RapidsIslip
GRR Grand Rapids Gerald R. Ford Intl - ISP Islip Long Island
GRRISP
Grand Rapids Gerald R. Ford Intl
Sun 9/6
7:50 am-4:35 pm
2 stops8h 45m
Islip Long Island
Mon 9/7
6:10 am-1:35 pm
1 stop7h 25m
$458
Cheapest one-way
Grand RapidsIslip
GRR Grand Rapids Gerald R. Ford Intl - ISP Islip Long Island
GRRISP
Grand Rapids Gerald R. Ford Intl
Wed 8/19
9:13 pm-9:53 am
1 stop12h 40m
$139
Quickest one-way
Grand RapidsIslip
GRR Grand Rapids Gerald R. Ford Intl - ISP Islip Long Island
GRRISP
Grand Rapids Gerald R. Ford Intl
Sun 9/13
6:00 am-9:55 am
1 stop3h 55m
$203
Grand RapidsIslip
GRR Grand Rapids Gerald R. Ford Intl - ISP Islip Long Island
GRRISP
Grand Rapids Gerald R. Ford Intl
Thu 8/20
5:45 am-9:40 am
1 stop3h 55m
$203
Grand RapidsIslip
GRR Grand Rapids Gerald R. Ford Intl - ISP Islip Long Island
GRRISP
Grand Rapids Gerald R. Ford Intl
Sun 9/13
4:31 pm-12:58 pm
3 stops44h 27m
$221
Showing 1-10 of 11 resultsSorted by cheapest first
Compare providers for flights from Grand Rapids to Islip
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 Grand Rapids to Islip in August.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars |
- 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.
GRR-ISP
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 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.
Traveling to a place near Islip?
Book flights to Islip if you plan to visit one of these locationsRiverhead
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