$350+ Cheap flights from Grand Rapids to Islip, NY (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 10/7. Fares are subject to change and may not be available on all flights or dates of travel.
GRR — ISP
Oct 21 — Oct 281
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
Cheapest
Best
Last-minute
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 September 21, 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 September 21, 2026.
This Southwest deal was found by Cheapflights users on 9/16. 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 10/75:35 am -
1 stop10h 10m
Sun 10/115:40 am -
1 stop9h 25m
Deal found 9/16![Southwest logo]()
$350
This Southwest deal was found by Cheapflights users on 9/16. 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 pm -
2 stops6h 05m
Mon 10/193:10 pm -
2 stops8h 35m
Deal found 9/16![Southwest logo]()
$361
This Southwest deal was found by Cheapflights users on 9/17. 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 11/275:30 am -
1 stop6h 15m
Mon 11/304:55 pm -
1 stop7h 35m
Deal found 9/17![Southwest logo]()
$591
This Southwest deal was found by Cheapflights users on 9/19. 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.
Sat 12/195:25 am -
1 stop11h 00m
Sun 1/36:05 am -
2 stops12h 25m
Deal found 9/19![Southwest logo]()
$630
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 September 21, 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 September 21, 2026.
This Southwest deal was found by Cheapflights users on 9/16. 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 10/75:35 am -
1 stop10h 10m
Sun 10/115:40 am -
1 stop9h 25m
Deal found 9/16![Southwest logo]()
$350
This Southwest deal was found by Cheapflights users on 9/16. 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 pm -
2 stops6h 05m
Mon 10/193:10 pm -
2 stops8h 35m
Deal found 9/16![Southwest logo]()
$361
This Southwest deal was found by Cheapflights users on 9/17. 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 11/275:30 am -
1 stop6h 15m
Mon 11/304:55 pm -
1 stop7h 35m
Deal found 9/17![Southwest logo]()
$591
This Southwest deal was found by Cheapflights users on 9/19. 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.
Sat 12/195:25 am -
1 stop11h 00m
Sun 1/36:05 am -
2 stops12h 25m
Deal found 9/19![Southwest logo]()
$630
Last-minute flights from Grand Rapids to IslipDiscover last-minute flight deals from Grand Rapids to Islip. Data last updated September 21, 2026 and is based on user searches.
Discover last-minute flight deals from Grand Rapids to Islip. Data last updated September 21, 2026 and is based on user searches.
This Southwest deal was found by Cheapflights users on 9/16. 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 10/75:35 am -
1 stop10h 10m
Sun 10/115:40 am -
1 stop9h 25m
Deal found 9/16![Southwest logo]()
$350
This Southwest deal was found by Cheapflights users on 9/16. 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 pm -
2 stops6h 05m
Mon 10/193:10 pm -
2 stops8h 35m
Deal found 9/16![Southwest logo]()
$361
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 September 21, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $350 (Southwest) |
Popular in | December |
Cheapest in | January |
Average price | $349 |
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 7,457,451 searches. Data last updated September 21, 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
Grand RapidsIslip
GRR Grand Rapids Gerald R. Ford Intl - ISP Islip Long Island
GRRISP
Grand Rapids Gerald R. Ford Intl
Wed 10/7
5:35 am-3:45 pm
1 stop10h 10m
Islip Long Island
Sun 10/11
5:40 am-3:05 pm
1 stop9h 25m
$350
Grand RapidsIslip
GRR Grand Rapids Gerald R. Ford Intl - ISP Islip Long Island
GRRISP
Grand Rapids Gerald R. Ford Intl
Fri 10/16
5:35 pm-11:40 pm
2 stops6h 05m
Islip Long Island
Mon 10/19
3:10 pm-11:45 pm
2 stops8h 35m
$361
Quickest round-trip
Grand RapidsIslip
GRR Grand Rapids Gerald R. Ford Intl - ISP Islip Long Island
GRRISP
Grand Rapids Gerald R. Ford Intl
Fri 11/27
5:30 am-11:45 am
1 stop6h 15m
Islip Long Island
Mon 11/30
4:55 pm-12:30 am
1 stop7h 35m
$591
Grand RapidsIslip
GRR Grand Rapids Gerald R. Ford Intl - ISP Islip Long Island
GRRISP
Grand Rapids Gerald R. Ford Intl
Sat 12/19
5:25 am-4:25 pm
1 stop11h 00m
Islip Long Island
Sun 1/3
6:05 am-6:30 pm
2 stops12h 25m
$630
Sorted 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 September.
| 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.
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 September 21, 2026.
Read reviews from past customers who have flown Southwest 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.
Boarding
8.1
Comfort
8.0
Crew
8.6
Overall
8.0
Food
7.0
Entertainment
7.5
Reviews
1 / 20
4.0
OkaySteven,Sep 2026
OGG - HNL
Boarding
8.1
Comfort
8.0
Crew
8.6
Overall
8.0
Food
7.0
Entertainment
7.5
Reviews
1 / 20
4.0
OkaySteven,Sep 2026
OGG - HNL
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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Top airline flying from Grand Rapids to Islip
Discover the top airline that operate flights from Grand Rapids to Islip. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated September 21, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$242 | Average$313 | FlexibilityNo cancel fee | On-time63% |