$157 Cheap Flights from Newark Liberty Intl. Airport (EWR) to Islip (ISP)

View $157 flight on Mon, Jul 28, 2025Opens in a new window

Popular airlines from Newark Liberty Intl. Airport (EWR) to MacArthur Airport (ISP)

Cheap Flights from Newark Liberty Intl. Airport to Islip (EWR-ISP)

Prices were available within the past 7 days and start at $157 for one-way flights and $292 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

JetBlue Airways
Wed, Jul 30 - Tue, Aug 5
EWR
New York
ISP
Islip
$292 Roundtrip, found 6 hours ago
$292
Roundtrip
found 6 hours ago
Select JetBlue Airways flight, departing Wed, Jul 30 from New York to Islip, returning Tue, Aug 5, priced at $292 found 6 hours ago
JetBlue Airways
Fri, Aug 1 - Fri, Aug 8
EWR
New York
ISP
Islip
$293 Roundtrip, found 3 days ago
$293
Roundtrip
found 3 days ago
Select JetBlue Airways flight, departing Fri, Aug 1 from New York to Islip, returning Fri, Aug 8, priced at $293 found 3 days ago
JetBlue Airways
Sat, Aug 2 - Wed, Aug 20
EWR
New York
ISP
Islip
$298 Roundtrip, found 3 days ago
$298
Roundtrip
found 3 days ago
Select JetBlue Airways flight, departing Sat, Aug 2 from New York to Islip, returning Wed, Aug 20, priced at $298 found 3 days ago
JetBlue Airways
Wed, Aug 20 - Tue, Sep 2
EWR
New York
ISP
Islip
$303 Roundtrip, found 6 days ago
$303
Roundtrip
found 6 days ago
Select JetBlue Airways flight, departing Wed, Aug 20 from New York to Islip, returning Tue, Sep 2, priced at $303 found 6 days ago
JetBlue Airways
Fri, Aug 1 - Wed, Aug 20
EWR
New York
ISP
Islip
$314 Roundtrip, found 3 days ago
$314
Roundtrip
found 3 days ago
Select JetBlue Airways flight, departing Fri, Aug 1 from New York to Islip, returning Wed, Aug 20, priced at $314 found 3 days ago
JetBlue Airways
Fri, Aug 1 - Tue, Aug 5
EWR
New York
ISP
Islip
$317 Roundtrip, found 6 hours ago
$317
Roundtrip
found 6 hours ago
Select JetBlue Airways flight, departing Fri, Aug 1 from New York to Islip, returning Tue, Aug 5, priced at $317 found 6 hours ago
JetBlue Airways
Mon, Aug 11 - Thu, Aug 14
EWR
New York
ISP
Islip
$318 Roundtrip, found 2 days ago
$318
Roundtrip
found 2 days ago
Select JetBlue Airways flight, departing Mon, Aug 11 from New York to Islip, returning Thu, Aug 14, priced at $318 found 2 days ago
JetBlue Airways
Wed, Aug 13 - Sat, Aug 30
EWR
New York
ISP
Islip
$322 Roundtrip, found 4 hours ago
$322
Roundtrip
found 4 hours ago
Select JetBlue Airways flight, departing Wed, Aug 13 from New York to Islip, returning Sat, Aug 30, priced at $322 found 4 hours ago
JetBlue Airways
Mon, Jul 21 - Thu, Aug 7
EWR
New York
ISP
Islip
$323 Roundtrip, found 3 days ago
$323
Roundtrip
found 3 days ago
Select JetBlue Airways flight, departing Mon, Jul 21 from New York to Islip, returning Thu, Aug 7, priced at $323 found 3 days ago
Frontier Airlines
Sun, Aug 31 - Mon, Sep 8
EWR
New York
ISP
Islip
$429 Roundtrip, found 8 hours ago
$429
Roundtrip
found 8 hours ago
Select Frontier Airlines flight, departing Sun, Aug 31 from New York to Islip, returning Mon, Sep 8, priced at $429 found 8 hours ago

Alternative airports near Islip

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to MacArthur ISP. Cheapest and Closest option available. Average driving time to city center is 14 minutes. Flights from $298
ISP
MacArthur
CheapestClosest
Average driving time to city center14 min
Flights from $298
Flights from Newark Liberty Intl. Airport (EWR) to Islip (ISP)
Origin airport
Newark Liberty Intl. Airport
Destination airport
MacArthur
Airlines serving
Frontier Airlines, JetBlue Airways
Roundtrip price
$292
Distance
56 mi

Newark Liberty Intl. Airport to Islip Flights

The cheapest times to fly from Newark Liberty Intl. Airport to Islip

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Newark Liberty Intl. Airport to Islip are during the month of July. You can find some of the cheapest flights from Newark Liberty Intl. Airport to Islip with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Newark Liberty Intl. Airport to Islip

Sunday is one of the best days to book for cheap flights from Newark Liberty Intl. Airport to Islip: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Newark Liberty Intl. Airport to Islip

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Newark Liberty Intl. Airport to Islip in 2025. You can also book with separate airlines for your outbound and return journeys, from $157 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Newark Liberty Intl. Airport to Islip flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Newark Liberty Intl. Airport to Islip airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Liberty Intl. Airport (EWR) to MacArthur Airport (ISP) cost?
Discover the latest flight deals from EWR to ISP by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from EWR to ISP?
The cheapest flights from EWR to ISP are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from EWR to ISP?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from EWR to ISP. Sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from Liberty Intl. Airport (EWR) to MacArthur Airport (ISP)?
Direct flights from Liberty Intl. Airport (EWR) to MacArthur Airport (ISP) aren't available daily, so you'll have to take a flight with a layover. Explore your options with Expedia's filter tool. Enter your travel details and choose either "1 Stop" or "2+ Stops."
What day of the week has the most flights from EWR to ISP?
You'll usually find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can vary from season to season and during peak travel times or public holidays.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Liberty Intl. Airport (EWR) to MacArthur Airport (ISP)?
Book a flight from Liberty Intl. Airport (EWR) to MacArthur Airport (ISP) that leaves before 3 PM to reduce the likelihood of delays. Departures later than this have a 22% higher chance of being canceled, on average.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Liberty Intl. Airport (EWR) to MacArthur Airport (ISP) last-minute?
Booking your ticket from EWR to ISP right before your trip is generally more expensive. However, if there's some wiggle room with your travel times and dates, you could score a cheap last-minute fare.
Is it cheaper to book an EWR to ISP flight and hotel package?
You'll typically save money by securing an EWR to ISP flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's easy to manage everything in one convenient place. After choosing your preferred accommodations and flights, you can add extras like car rentals, activities and tours.
Can I cancel or change the date of my flight from Liberty Intl. Airport (EWR) to MacArthur Airport (ISP)?
If you reserved your EWR to ISP flight in the last 24 hours, you may be able to cancel or modify it at no cost. Depending on the airline and the type of ticket you have, additional charges may apply for changes after that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, go to our Customer Service portal if you'd like more information.

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*Available to One Key members.