HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Islip

$91+ Cheap flights from Las Vegas to Islip, NY (LAS - 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 9/16. Fares are subject to change and may not be available on all flights or dates of travel.
LAS — ISP
Aug 22 — Aug 291
Fri 8/22
Fri 8/29
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Las Vegas 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 Las Vegas to Islip

Discover tips and strategies to find the most affordable flight options for your journey from Las Vegas (LAS) 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 17, 2025.

Round-trip from

$181
(CheapOair)

One-way from

$91
(CheapOair)

Popular in

December

Cheapest in

March

Average price

$556
From Las Vegas Harry Reid Intl to Islip Long Island
Search Deals
One-way flight from Las Vegas Harry Reid Intl to Islip Long Island
Search Deals
Highest demand for flights based on searches. 23% potential increase in price ($140 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease ($33 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2025
Search Deals

Find flight deals from Las Vegas to Islip

Cheapest flights from Las Vegas to Islip
Explore the most affordable flight options available from Las Vegas to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 17, 2025.

This CheapOair deal was found by Cheapflights users on 8/15. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/511:04 pmLAS - ISP
1 stop8h 51mFrontier
Mon 9/85:05 pmISP - LAS
1 stop25h 34mFrontier
Deal found 8/15$181
This CheapOair deal was found by Cheapflights users on 8/17. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2210:16 pmLAS - ISP
1 stop19h 26mFrontier
Sat 10/254:58 pmISP - LAS
1 stop9h 54mFrontier
Deal found 8/17$212
This Frontier deal was found by Cheapflights users on 8/17. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/1710:16 pmLAS - ISP
1 stop9h 21mFrontier
Sun 10/199:44 amISP - LAS
2 stops13h 41mFrontier
Deal found 8/17$213
This CheapOair deal was found by Cheapflights users on 8/17. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/411:04 pmLAS - ISP
1 stop8h 36mFrontier
Sun 9/711:35 amISP - LAS
1 stop24h 35mFrontier
Deal found 8/17$219
This CheapOair deal was found by Cheapflights users on 8/17. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/1011:04 pmLAS - ISP
1 stop8h 36mFrontier
Sun 9/1411:25 amISP - LAS
1 stop24h 45mFrontier
Deal found 8/17$227
This CheapOair deal was found by Cheapflights users on 8/16. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1911:04 pmLAS - ISP
1 stop8h 51mFrontier
Fri 9/265:05 pmISP - LAS
1 stop25h 34mFrontier
Deal found 8/16$238
This FlightHub deal was found by Cheapflights users on 8/15. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/312:50 pmLAS - ISP
2 stops41h 14mFrontier
Tue 9/2311:25 amISP - LAS
2 stops39h 25mFrontier
Deal found 8/15$243
This Frontier deal was found by Cheapflights users on 8/16. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1911:04 pmLAS - ISP
1 stop8h 51mFrontier
Sun 9/219:49 amISP - LAS
2 stops16h 44mFrontier
Deal found 8/16$256
This CheapOair deal was found by Cheapflights users on 8/16. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/810:16 pmLAS - ISP
1 stop19h 26mFrontier
Tue 10/219:37 pmISP - LAS
1 stop14h 50mFrontier
Deal found 8/16$259
This CheapOair deal was found by Cheapflights users on 8/17. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/3111:02 pmLAS - ISP
1 stop8h 35mFrontier
Sun 11/99:27 pmISP - LAS
1 stop15h 40mFrontier
Deal found 8/17$266

Cheapflights Fare Finder

 
Customize your flight search to find flights from Las Vegas 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 17, 2025.
Use the filters below to find and compare flights from Las Vegas to Islip that are best for you.

Fly from

Las Vegas

Fly to

Islip

Route

Depart

Return

Price

Las VegasIslip

LAS - ISP

LASISP

Las Vegas Harry Reid Intl

Fri 9/5

11:04 pm-10:55 am

1 stop8h 51m

Islip Long Island

Mon 9/8

5:05 pm-3:39 pm

1 stop25h 34m

$181

Las VegasIslip

LAS - ISP

LASISP

Las Vegas Harry Reid Intl

Fri 9/5

11:04 pm-10:55 am

1 stop8h 51m

Islip Long Island

Tue 9/9

11:25 am-3:39 pm

1 stop31h 14m

$181

Las VegasIslip

LAS - ISP

LASISP

Las Vegas Harry Reid Intl

Fri 9/12

11:04 pm-10:55 am

1 stop8h 51m

Islip Long Island

Sat 9/13

5:05 pm-9:10 am

1 stop19h 05m

$181

Las VegasIslip

LAS - ISP

LASISP

Las Vegas Harry Reid Intl

Wed 10/29

11:02 pm-5:42 pm

1 stop15h 40m

Islip Long Island

Mon 11/3

4:58 pm-10:07 am

1 stop20h 09m

$181

Las VegasIslip

LAS - ISP

LASISP

Las Vegas Harry Reid Intl

Wed 10/22

10:16 pm-8:42 pm

1 stop19h 26m

Islip Long Island

Sat 10/25

4:58 pm-11:52 pm

1 stop9h 54m

$212

Las VegasIslip

LAS - ISP

LASISP

Las Vegas Harry Reid Intl

Wed 9/10

11:04 pm-10:40 am

1 stop8h 36m

Islip Long Island

Mon 9/15

5:05 pm-3:39 pm

1 stop25h 34m

$212

Las VegasIslip

LAS - ISP

LASISP

Las Vegas Harry Reid Intl

Fri 10/17

10:16 pm-10:37 am

1 stop9h 21m

Islip Long Island

Sun 10/19

9:44 am-8:25 pm

2 stops13h 41m

$213

Las VegasIslip

LAS - ISP

LASISP

Las Vegas Harry Reid Intl

Thu 10/16

10:16 pm-10:37 am

1 stop9h 21m

$91

Las VegasIslip

LAS - ISP

LASISP

Las Vegas Harry Reid Intl

Mon 9/8

11:04 pm-10:40 am

1 stop8h 36m

$91

Las VegasIslip

LAS - ISP

LASISP

Las Vegas Harry Reid Intl

Thu 9/18

11:04 pm-10:40 am

1 stop8h 36m

$91

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/17

Showing 1-10 of 16 results
1
2

Best time to book a flight from Las Vegas to Islip

Have a flexible travel schedule? Discover the best time to fly to Islip from Las Vegas with our price prediction graph.
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.

Cheapflights Insights

Everything you need to know about your flight from Las Vegas to Islip

What is the cheapest month to book a flight from Las Vegas to Islip, New York?

Currently, January is the cheapest month in which you can book a flight from Las Vegas to Islip, New York (average of $108). Flying from Las Vegas to Islip, New York in November is currently the most expensive (average of $213). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from LAS to ISP?

Find hourly flight availability from Las Vegas to Islip. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 17, 2025.

It’s optimal to fly from Las Vegas to Islip, New York at noon. By choosing this option you can save up to 47% on the cost of your flight, compared to a flight in the morning.

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 August 17, 2025.
Read through reviews of airlines operating flights from Las Vegas to Islip, such as Southwest. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,246 reviews

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Overall

8.0

Crew

8.6

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Southwest
8.0
Very good
4,246 reviews
Southwest
8.0
Very good
4,246 reviews

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Overall

8.0

Crew

8.6

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.

Related info for your journey

Find useful and relevant information for your journey from Las Vegas to Islip. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What is the cheapest airline to fly from Las Vegas to Islip, New York round-trip?

    Our cheapest airline available from Las Vegas to Islip, New York is Southwest. Our recent data shows that you can find tickets from as low as $356 on this airline. Users have found that Southwest is 23% cheaper than the other options available to this destination.

  • Can I find deals for flights from Las Vegas to Islip that include hotel bookings?

    Yes. In addition to deals on Las Vegas to Islip flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Las Vegas to Islip?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Las Vegas to Islip.

  • Can I find deals for business class flights from Las Vegas to Islip?

    Yes. Cheapflights offers flight deals from Las Vegas to Islip by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Las Vegas to Islip, New York?

    Currently, January is the cheapest month in which you can book a flight from Las Vegas to Islip, New York (average of $108). Flying from Las Vegas to Islip, New York in November is currently the most expensive (average of $213). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Islip?

Book flights to Islip if you plan to visit one of these locations
Riverhead
Southampton

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Las Vegas to Islip

See prices for flight routes from nearby airports that may be better suited for you.
Las Vegas to John F Kennedy Intl flights
Las Vegas to Newark flights
Las Vegas to LaGuardia flights
Reno to John F Kennedy Intl flights
Reno to Newark flights
Reno to LaGuardia flights
Las Vegas to Buffalo flights
Las Vegas to Albany flights
Las Vegas to Rochester flights
Las Vegas to Stewart flights
Las Vegas to White Plains flights
Las Vegas to Syracuse flights
Reno to Buffalo flights
Reno to Syracuse flights
Reno to White Plains flights
Reno to Rochester flights
Reno to Albany flights
Reno to Ithaca flights
Twin Falls to Newark flights
Twin Falls to John F Kennedy Intl flights
Las Vegas to Rutland flights
Las Vegas to Niagara Falls flights
Twin Falls to Albany flights
Reno to Binghamton flights
Reno to Stewart flights
Las Vegas to Binghamton flights
Reno to Elmira flights
Las Vegas to Plattsburgh flights
Las Vegas to Ithaca flights
Las Vegas to Elmira flights
Las Vegas to Watertown flights

Top airline flying from Las Vegas to Islip

Discover the top airline that operate flights from Las Vegas 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 2,558,603 searches. Data last updated August 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$356Average$506FlexibilityNo cancel feeOn-time63%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.