$146 Cheap Flights from Las Vegas (LAS) to Islip (ISP)

View $146 flight on Mon, Dec 15, 2025Opens in a new window

Popular airlines from Harry Reid Intl. Airport (LAS) to MacArthur Airport (ISP)

Cheap Flights from Las Vegas to Islip (LAS-ISP)

Prices were available within the past 7 days and start at $146 for one-way flights and $201 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Fri, Oct 3 - Tue, Oct 14
LAS
Las Vegas
ISP
Islip
$201 Roundtrip, found 4 days ago
$201
Roundtrip
found 4 days ago
Select Frontier Airlines flight, departing Fri, Oct 3 from Las Vegas to Islip, returning Tue, Oct 14, priced at $201 found 4 days ago
Frontier Airlines
Fri, Oct 17 - Sun, Oct 26
LAS
Las Vegas
ISP
Islip
$247 Roundtrip, found 5 days ago
$247
Roundtrip
found 5 days ago
Select Frontier Airlines flight, departing Fri, Oct 17 from Las Vegas to Islip, returning Sun, Oct 26, priced at $247 found 5 days ago
JetBlue Airways
Tue, Oct 28 - Tue, Nov 4
LAS
Las Vegas
ISP
Islip
$285 Roundtrip, found 1 day ago
$285
Roundtrip
found 1 day ago
Select JetBlue Airways flight, departing Tue, Oct 28 from Las Vegas to Islip, returning Tue, Nov 4, priced at $285 found 1 day ago
JetBlue Airways
Fri, Oct 31 - Tue, Nov 4
LAS
Las Vegas
ISP
Islip
$288 Roundtrip, found 1 day ago
$288
Roundtrip
found 1 day ago
Select JetBlue Airways flight, departing Fri, Oct 31 from Las Vegas to Islip, returning Tue, Nov 4, priced at $288 found 1 day ago
JetBlue Airways
Fri, Oct 31 - Sat, Nov 15
LAS
Las Vegas
ISP
Islip
$291 Roundtrip, found 1 day ago
$291
Roundtrip
found 1 day ago
Select JetBlue Airways flight, departing Fri, Oct 31 from Las Vegas to Islip, returning Sat, Nov 15, priced at $291 found 1 day ago
JetBlue Airways
Tue, Oct 28 - Mon, Nov 3
LAS
Las Vegas
ISP
Islip
$295 Roundtrip, found 1 day ago
$295
Roundtrip
found 1 day ago
Select JetBlue Airways flight, departing Tue, Oct 28 from Las Vegas to Islip, returning Mon, Nov 3, priced at $295 found 1 day ago
JetBlue Airways
Fri, Oct 31 - Mon, Nov 3
LAS
Las Vegas
ISP
Islip
$298 Roundtrip, found 1 day ago
$298
Roundtrip
found 1 day ago
Select JetBlue Airways flight, departing Fri, Oct 31 from Las Vegas to Islip, returning Mon, Nov 3, priced at $298 found 1 day ago
Frontier Airlines
Fri, Oct 3 - Tue, Oct 7
LAS
Las Vegas
ISP
Islip
$303 Roundtrip, found 1 day ago
$303
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Fri, Oct 3 from Las Vegas to Islip, returning Tue, Oct 7, priced at $303 found 1 day ago
JetBlue Airways
Tue, Dec 2 - Tue, Dec 9
LAS
Las Vegas
ISP
Islip
$308 Roundtrip, found 2 days ago
$308
Roundtrip
found 2 days ago
Select JetBlue Airways flight, departing Tue, Dec 2 from Las Vegas to Islip, returning Tue, Dec 9, priced at $308 found 2 days ago
Southwest Airlines
Fri, Oct 24 - Tue, Oct 28
LAS
Las Vegas
ISP
Islip
$322 Roundtrip, found 5 days ago
$322
Roundtrip
found 5 days ago
Select Southwest Airlines flight, departing Fri, Oct 24 from Las Vegas to Islip, returning Tue, Oct 28, priced at $322 found 5 days ago

Find the cheapest month to fly from Las Vegas (LAS) to Islip (ISP)

January is typically the cheapest month to fly

From $140 - $803 per traveler.
Flights from Las Vegas (LAS) to Islip (ISP)
Origin airport
Harry Reid Intl.
Destination airport
MacArthur
Airlines serving
Frontier Airlines, JetBlue Airways, Southwest Airlines
Roundtrip price
$200
Distance
2276 mi

Las Vegas to Islip Flights

The cheapest times to fly from Las Vegas 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 Las Vegas to Islip are during the month of October. You can find some of the cheapest flights from Las Vegas to Islip with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Las Vegas to Islip

Sunday is one of the best days to book for cheap flights from Las Vegas 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 Las Vegas 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 Las Vegas to Islip in 2025. You can also book with separate airlines for your outbound and return journeys, from $146 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 Las Vegas 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 Las Vegas 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 Harry Reid Intl. Airport (LAS) to MacArthur Airport (ISP) cost?
Get a cheap one-way flight from $146 or cheap return flight from $201 from Harry Reid Intl. Airport (LAS) to MacArthur Airport (ISP) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Harry Reid Intl. Airport (LAS) to MacArthur Airport (ISP)?
Planning your trip for October may help you find better deals, as it's the cheapest month for flights between LAS and ISP. You'll often find the lowest fares during the off-season.
What is the cheapest airline that flies from Harry Reid Intl. Airport (LAS) to MacArthur Airport (ISP)?
Use the filters on Expedia to compare different airlines and find the most affordable carrier that'll fly you from LAS to ISP. Then, sort your results by "Price (lowest to highest)" to snag the best deal available.
How many flights per day from Harry Reid Intl. Airport (LAS) to MacArthur Airport (ISP)?
There aren't any daily nonstop flights from Harry Reid Intl. Airport (LAS) to MacArthur Airport (ISP). But you can opt for flights with layovers. Filter your search results on Expedia to include one or two stops, and you'll be on your way before you know it.
What day of the week has the most flights from LAS to ISP?
Generally you'll have the most choice when it comes to flights on a Friday. Tuesdays are often the quietest.* However, this can change depending on the season, carrier and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Harry Reid Intl. Airport (LAS) to MacArthur Airport (ISP)?
To avoid possible delays on the Harry Reid Intl. Airport (LAS) to MacArthur Airport (ISP) route, travel before 3 PM. Later flights have a 22% higher chance of being canceled.**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.
What airports do you fly into for Islip from Harry Reid Intl. Airport (LAS)?
John F. Kennedy Intl. Airport (JFK) is the only airport in Islip with direct flights from Harry Reid Intl. Airport (LAS). Compare the options and discover affordable fares on Expedia.
Is it cheaper to buy a plane ticket from Harry Reid Intl. Airport (LAS) to MacArthur Airport (ISP) last-minute?
Last-minute fares from LAS to ISP are typically more expensive. To secure the lowest prices, start searching for flights well in advance. That being said, if you're flexible with your travel plans, it's possible to land a cheap fare right before your trip.
Is it cheaper to book a LAS to ISP flight and hotel package?
Booking a LAS to ISP flight and hotel package is generally cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your trip in one place. Choose from our extensive range of accommodations and then add flights, activities and car rentals to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Harry Reid Intl. Airport (LAS) to MacArthur Airport (ISP)?
In most instances, you can reschedule or cancel your LAS to ISP flight. However, additional fees may apply, especially if your booking was made over 24 hours ago. Check your itinerary for the airline's fees and policies on flight changes, or if you want further details, head to our Customer Service portal.

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*Available to One Key members.