Cheap flights from Islip to Grand Rapids from $139

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Islip to Grand Rapids departing on 10/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.

Find the cheapest flights from Islip to Grand Rapids

Cheap round-trip flights

Southwest Logo
6:00 am - 2:20 pmISP-GRR
8h 20m1 stop
Southwest Logo
1:25 pm - 11:50 pmGRR-ISP
10h 25m1 stop
$233Southwest
Find Deal
Wed, Oct 29 - Fri, Nov 7
Southwest Logo
6:00 am - 4:25 pmISP-GRR
10h 25m2 stops
Southwest Logo
12:05 pm - 11:50 pmGRR-ISP
11h 45m2 stops
$294Southwest
Find Deal
Wed, Oct 29 - Fri, Nov 7

Southwest flights from Islip to Grand Rapids

Our best Southwest deals on Islip to Grand Rapids flight tickets
Southwest
Oct 29
ISP6:00 amIslip Long Island
8h 20m
1 stop
GRR2:20 pmGrand Rapids Gerald R. Ford Intl
Nov 7
GRR1:25 pmGrand Rapids Gerald R. Ford Intl
10h 25m
1 stop
ISP11:50 pmIslip Long Island
Southwest
Oct 29
ISP6:00 amIslip Long Island
10h 25m
2 stops
GRR4:25 pmGrand Rapids Gerald R. Ford Intl
Nov 7
GRR12:05 pmGrand Rapids Gerald R. Ford Intl
11h 45m
2 stops
ISP11:50 pmIslip Long Island

momondo 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, momondo users made 832,500 searches. Data last updated September 16, 2025.
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

Price

IslipGrand Rapids

ISP - GRR

ISPGRR

Islip Long Island

Wed 10/29

6:00 am-2:20 pm

1 stop8h 20m

Grand Rapids Gerald R. Ford Intl

Fri 11/7

1:25 pm-11:50 pm

1 stop10h 25m

$233

IslipGrand Rapids

ISP - GRR

ISPGRR

Islip Long Island

Wed 10/29

6:00 am-4:25 pm

2 stops10h 25m

Grand Rapids Gerald R. Ford Intl

Fri 11/7

12:05 pm-11:50 pm

2 stops11h 45m

$294

IslipGrand Rapids

ISP - GRR

ISPGRR

Islip Long Island

Wed 10/15

4:58 pm-9:43 am

1 stop16h 45m

$139

IslipGrand Rapids

ISP - GRR

ISPGRR

Islip Long Island

Wed 10/15

6:00 am-4:25 pm

2 stops10h 25m

$167

IslipGrand Rapids

ISP - GRR

ISPGRR

Islip Long Island

Wed 10/15

4:58 pm-9:31 pm

3 stops28h 33m

$303

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

See travel insights to Grand Rapids from

How to get the cheapest flight ticket from Islip to Grand Rapids

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest day to depart on your flight to Grand Rapids?

Our data shows that Saturday is the least expensive day to fly to Grand Rapids. Tickets to fly out on this day can be as low as $299. Be sure to avoid booking your departure on a Monday as prices are generally higher than usual. According to our data, the average ticket price to Grand Rapids on Monday is $422.

What is the cheapest time of day to depart on your flight to Grand Rapids?

At noon is the cheapest time of day to fly from Islip to Grand Rapids when you can find flight prices for as low as $311. Flying to Grand Rapids at noon is an ideal time because this is during off-peak travel hours. Flights to Grand Rapids are more costly in the afternoon, with an average ticket price of $372. Departure times in the afternoon fall within the peak daily travel times, which is why tickets can be more expensive.

Can stopping save me money on Islip to Grand Rapids flights?

You could potentially save up to 61% on your flight if you consider stops on a Islip to Grand Rapids flight.

When to book flights from Islip to Grand Rapids

Are you open to changing your travel dates? Check out the ideal times to fly from Islip to Grand Rapids according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Islip to Grand Rapids (ISP to GRR) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Islip to Grand Rapids

Direct flights

None
There are no direct flights from Islip to Grand Rapids. There are no popular flight routes from Islip to Grand Rapids.
  • How far is Islip Long Island to Grand Rapids Gerald R. Ford Intl by plane?

    Grand Rapids Gerald R. Ford Intl is 658.6 mi away from Islip Long Island. 8h 20m is a normal flight duration for this route.

  • When did momondo last update prices for flights from Islip Long Island Airport to Grand Rapids Gerald R. Ford Intl Airport?

    Prices for flights from Islip Long Island Airport to Grand Rapids Gerald R. Ford Intl Airport are refreshed on a daily basis.

  • How old do you have to be to fly from Islip Long Island Airport to Grand Rapids Gerald R. Ford Intl Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Islip Long Island Airport to Grand Rapids Gerald R. Ford Intl Airport.

  • What documentation or ID do you need to fly to Grand Rapids Gerald R. Ford Intl Airport?

    The travel and health documents you'll need for your trip to Grand Rapids Gerald R. Ford Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Grand Rapids Gerald R. Ford Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Traveling to a place near Grand Rapids?

Book flights to Grand Rapids if you plan to visit one of these locations
Holland
Saugatuck
Wyoming
Big Rapids
Rockford
Douglas
Hastings
Sparta

Why use momondo?

Why should I use momondo to find a flight deal from Islip to Grand Rapids?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Grand Rapids from Islip.

Can I find flights from Islip to Grand Rapids with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Islip to Grand Rapids flights to just show those with flexible booking policies.

How can momondo help me find flights from Islip to Grand Rapids?

Once you have performed a search for Islip to Grand Rapids flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Islip to Grand Rapids right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Islip to Grand Rapids flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

An easier way to manage your Grand Rapids trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Thu 10/16
Thu 10/23

Find better results for your trip to the United States