HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Las Vegas

$96+ Cheap flights from Islip, NY to Las Vegas (ISP - LAS)

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 9/7. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — LAS
Aug 21 — Aug 281
Thu 8/21
Thu 8/28
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Islip to Las Vegas 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 Islip to Las Vegas

Discover tips and strategies to find the most affordable flight options for your journey from Islip (ISP) to Las Vegas (LAS). 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 16, 2025.

Round-trip from

$181
(CheapOair)

One-way from

$96
(CheapOair)

Popular in

June

Cheapest in

October

Average price

$397
From Islip Long Island to Las Vegas Harry Reid Intl
Search Deals
One-way flight from Islip Long Island to Las Vegas Harry Reid Intl
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($52 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($18 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2025
Search Deals

Find flight deals from Islip to Las Vegas

Cheapest flights from Islip to Las Vegas
Explore the most affordable flight options available from Islip to Las Vegas. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 16, 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 9/55:05 pmISP - LAS
1 stop25h 34mFrontier
Sat 9/1311:04 pmLAS - ISP
1 stop8h 36mFrontier
Deal found 8/15$181
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.
Fri 9/55:05 pmISP - LAS
1 stop25h 34mFrontier
Mon 9/811:04 pmLAS - ISP
1 stop8h 36mFrontier
Deal found 8/15$203
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.
Sat 9/205:05 pmISP - LAS
1 stop19h 05mFrontier
Wed 9/2411:04 pmLAS - ISP
1 stop8h 51mFrontier
Deal found 8/15$204
This Frontier deal was found by Cheapflights users on 8/14. 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.
Thu 9/411:45 amISP - LAS
2 stops15h 05mFrontier
Tue 9/911:04 pmLAS - ISP
1 stop8h 36mFrontier
Deal found 8/14$212
This Frontier deal was found by Cheapflights users on 8/14. 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.
Sun 10/199:44 amISP - LAS
2 stops13h 41mFrontier
Fri 10/2410:16 pmLAS - ISP
1 stop9h 21mFrontier
Deal found 8/14$213
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/279:49 amISP - LAS
2 stops16h 47mFrontier
Thu 10/3011:02 pmLAS - ISP
1 stop8h 35mFrontier
Deal found 8/15$214
This Cheapflightsfares deal was found by Cheapflights users on 8/14. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/1410:39 amISP - LAS
2 stops11h 16mFrontier
Fri 10/3111:02 pmLAS - ISP
1 stop8h 35mFrontier
Deal found 8/14$215
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 10/294:58 pmISP - LAS
2 stops31h 32mFrontier
Sat 11/111:02 pmLAS - ISP
1 stop19h 40mFrontier
Deal found 8/15$218
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/45:12 pmISP - LAS
2 stops17h 04mFrontier
Mon 9/811:04 pmLAS - ISP
1 stop8h 36mFrontier
Deal found 8/15$221
This FlightHub deal was found by Cheapflights users on 8/14. 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.
Mon 9/295:05 pmISP - LAS
2 stops21h 03mFrontier
Thu 10/211:04 pmLAS - ISP
1 stop8h 36mFrontier
Deal found 8/14$225
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.
Sat 9/135:05 pmISP - LAS
1 stop19h 05mFrontier
Sat 9/2011:04 pmLAS - ISP
1 stop8h 36mFrontier
Deal found 8/15$227

Cheapflights Fare Finder

 
Customize your flight search to find flights from Islip to Las Vegas 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 16, 2025.
Use the filters below to find and compare flights from Islip to Las Vegas that are best for you.

Fly from

Islip

Fly to

Las Vegas

Route

Depart

Return

Price

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Sun 9/7

11:35 am-9:10 am

1 stop24h 35m

Las Vegas Harry Reid Intl

Wed 9/10

11:04 pm-10:40 am

1 stop8h 36m

$181

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Fri 9/5

5:05 pm-3:39 pm

1 stop25h 34m

Las Vegas Harry Reid Intl

Mon 9/8

11:04 pm-10:40 am

1 stop8h 36m

$181

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Sun 10/26

9:47 pm-9:35 am

1 stop14h 48m

Las Vegas Harry Reid Intl

Wed 10/29

11:02 pm-5:42 pm

1 stop15h 40m

$181

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Mon 9/8

5:05 pm-3:39 pm

1 stop25h 34m

Las Vegas Harry Reid Intl

Tue 9/9

11:04 pm-10:40 am

1 stop8h 36m

$181

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Sun 10/19

9:47 pm-12:54 am

1 stop30h 07m

Las Vegas Harry Reid Intl

Thu 10/23

10:16 pm-10:37 am

1 stop9h 21m

$181

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Tue 9/9

11:25 am-3:39 pm

1 stop31h 14m

Las Vegas Harry Reid Intl

Sat 9/13

11:04 pm-10:40 am

1 stop8h 36m

$181

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Fri 9/12

5:05 pm-3:39 pm

1 stop25h 34m

Las Vegas Harry Reid Intl

Mon 9/15

11:04 pm-10:40 am

1 stop8h 36m

$181

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Fri 9/5

5:05 pm-3:39 pm

1 stop25h 34m

Las Vegas Harry Reid Intl

Sat 9/13

11:04 pm-10:40 am

1 stop8h 36m

$181

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Mon 9/8

5:05 pm-3:39 pm

1 stop25h 34m

Las Vegas Harry Reid Intl

Fri 9/12

11:04 pm-10:55 am

1 stop8h 51m

$203

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Sun 9/7

11:35 am-9:10 am

1 stop24h 35m

$96

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/15

Showing 1-10 of 18 results
1
2

Best time to book a flight from Islip to Las Vegas

Have a flexible travel schedule? Discover the best time to fly to Las Vegas from Islip 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 Islip to Las Vegas

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

Currently, August is the cheapest month in which you can book a flight from Islip, New York to Las Vegas (average of $198). Flying from Islip, New York to Las Vegas in March is currently the most expensive (average of $269). 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 ISP to LAS?

Find hourly flight availability from Islip to Las Vegas. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 16, 2025.

When flying from Islip, New York to Las Vegas, the time of day you fly usually plays a role in the price. Save by searching for a flight at noon, which can drop the price by up to 15% versus a flight in the morning.

Reviews of airlines servicing Las Vegas

Get insights into the airlines that provide service to Las Vegas. 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 Las Vegas. Reviews last updated August 16, 2025.
See what other customers who have flown with Southwest and Frontier from Islip to Las Vegas have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,246 reviews

Comfort

8.0

Boarding

8.1

Entertainment

7.5

Crew

8.6

Overall

8.0

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

Comfort

8.0

Boarding

8.1

Entertainment

7.5

Crew

8.6

Overall

8.0

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.
Frontier
5.8
Fair
3,211 reviews
Southwest
8.0
Very good
4,246 reviews

Comfort

8.0

Boarding

8.1

Entertainment

7.5

Crew

8.6

Overall

8.0

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

  • What are the cheapest airlines flying from Islip, New York to Las Vegas round-trip?

    Flying on Frontier is currently your cheapest option to Las Vegas, with prices starting at $150. Another option worth looking into is Southwest, starting at $388 round trip. These flights start at 68% lower than the current average price 3 months from now.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Islip to Las Vegas 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 Islip, New York to Las Vegas?

    Currently, August is the cheapest month in which you can book a flight from Islip, New York to Las Vegas (average of $198). Flying from Islip, New York to Las Vegas in March is currently the most expensive (average of $269). 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 Las Vegas?

Book flights to Las Vegas if you plan to visit one of these locations
Henderson
Paradise
North Las Vegas
Sunrise Manor
Winchester
Primm
Mount Charleston
Kingman
Mesquite
Needles
Boulder City

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 Islip to Las Vegas

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

Top 2 airlines flying from Islip to Las Vegas

Discover the top 2 airlines that operate flights from Islip to Las Vegas. 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 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$150Average$268FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$388Average$495FlexibilityNo 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.