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$71+ 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 12/6. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — LAS
Dec 18 — Dec 251
Thu 12/18
Thu 12/25
1 adult, Economy
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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 November 18, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$130
(CheapOair)

One-way from

$71
(CheapOair)

Popular in

November

Cheapest in

January

Average price

$864
Provider with most accurate pricing for Islip Long Island-Las Vegas Harry Reid Intl flight deals.
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Provider most trusted by Cheapflights users for Islip Long Island-Las Vegas Harry Reid Intl flights.
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From Islip Long Island to Las Vegas Harry Reid Intl
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One-way flight from Islip Long Island to Las Vegas Harry Reid Intl
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Highest demand for flights based on searches. 19% potential increase in price ($119 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($33 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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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 November 18, 2025.

This CheapOair deal was found by Cheapflights users on 11/16. 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.
Sat 12/610:19 amISP - LAS
1 stop26h 24mFrontier
Mon 12/810:20 pmLAS - ISP
1 stop18h 14mFrontier
Deal found 11/16$130
This CheapOair deal was found by Cheapflights users on 11/18. 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.
Tue 12/28:29 pmISP - LAS
1 stop16h 54mFrontier
Sat 12/610:20 pmLAS - ISP
1 stop9h 00mFrontier
Deal found 11/18$137
This CheapOair deal was found by Cheapflights users on 11/18. 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 12/610:19 amISP - LAS
1 stop26h 24mFrontier
Tue 12/910:20 pmLAS - ISP
1 stop21h 24mFrontier
Deal found 11/18$138
This CheapOair deal was found by Cheapflights users on 11/18. 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.
Tue 12/28:29 pmISP - LAS
1 stop16h 54mFrontier
Fri 12/510:20 pmLAS - ISP
1 stop7h 53mFrontier
Deal found 11/18$145
This CheapOair deal was found by Cheapflights users on 11/18. 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 12/36:00 amISP - LAS
1 stop30h 43mFrontier
Fri 12/510:20 pmLAS - ISP
1 stop7h 53mFrontier
Deal found 11/18$146
This CheapOair deal was found by Cheapflights users on 11/18. 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 12/36:00 amISP - LAS
1 stop30h 43mFrontier
Sat 12/610:20 pmLAS - ISP
1 stop9h 00mFrontier
Deal found 11/18$150
This CheapOair deal was found by Cheapflights users on 11/17. 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.
Mon 12/810:19 amISP - LAS
1 stop27h 04mFrontier
Mon 12/1510:20 pmLAS - ISP
1 stop18h 14mFrontier
Deal found 11/17$176
This CheapOair deal was found by Cheapflights users on 11/17. 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 12/128:29 pmISP - LAS
1 stop16h 14mFrontier
Mon 12/1510:20 pmLAS - ISP
1 stop18h 14mFrontier
Deal found 11/17$180
This Kiwi.com deal was found by Cheapflights users on 11/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/28:29 pmISP - LAS
1 stop16h 54mMultiple Airlines
Fri 12/512:39 pmLAS - ISP
2 stops23h 31mMultiple Airlines
Deal found 11/16$183
This CheapOair deal was found by Cheapflights users on 11/17. 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.
Sat 12/1310:19 amISP - LAS
1 stop26h 24mFrontier
Mon 12/1510:20 pmLAS - ISP
1 stop18h 14mFrontier
Deal found 11/17$184
This Kiwi.com deal was found by Cheapflights users on 11/17. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/1310:19 amISP - LAS
1 stop26h 24mMultiple Airlines
Tue 12/1611:45 pmLAS - ISP
2 stops19h 59mMultiple Airlines
Deal found 11/17$189
This CheapOair deal was found by Cheapflights users on 11/18. 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 12/1310:19 amISP - LAS
1 stop26h 24mFrontier
Tue 12/1610:20 pmLAS - ISP
1 stop23h 18mFrontier
Deal found 11/18$196

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 November 18, 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

Tue 12/2

8:29 pm-10:23 am

1 stop16h 54m

Las Vegas Harry Reid Intl

Tue 12/9

10:20 pm-10:44 pm

1 stop21h 24m

$137

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Sat 12/6

10:19 am-9:43 am

1 stop26h 24m

Las Vegas Harry Reid Intl

Tue 12/9

10:20 pm-10:44 pm

1 stop21h 24m

$138

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Mon 12/8

10:19 am-10:23 am

1 stop27h 04m

Las Vegas Harry Reid Intl

Wed 12/10

10:20 pm-9:13 am

1 stop7h 53m

$176

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Tue 1/13

8:00 am-11:42 am

1 stop30h 42m

Las Vegas Harry Reid Intl

Sat 1/17

11:03 pm-7:03 pm

1 stop17h 00m

$204

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Sun 3/1

5:03 pm-9:43 am

1 stop19h 40m

Las Vegas Harry Reid Intl

Thu 3/5

10:45 pm-7:11 pm

1 stop17h 26m

$226

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Thu 1/8

8:46 pm-9:43 am

1 stop15h 57m

Las Vegas Harry Reid Intl

Tue 1/13

11:03 pm-10:46 pm

1 stop20h 43m

$226

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Sat 12/6

10:19 am-9:43 am

1 stop26h 24m

Las Vegas Harry Reid Intl

Sun 12/7

10:20 pm-9:13 am

1 stop7h 53m

$256

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Fri 12/12

8:29 pm-9:43 am

1 stop16h 14m

Las Vegas Harry Reid Intl

Sun 12/14

10:20 pm-9:13 am

1 stop7h 53m

$260

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Fri 2/27

5:03 pm-9:43 am

1 stop19h 40m

Las Vegas Harry Reid Intl

Sun 3/1

10:45 pm-10:40 am

1 stop8h 55m

$264

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Mon 12/8

10:19 am-10:23 am

1 stop27h 04m

$71

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/17

Showing 1-10 of 19 results
1
2

Compare providers for flights from Islip to Las Vegas

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Islip to Las Vegas in November.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Islip, New York-Las Vegas flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Islip, New York-Las Vegas flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Islip, New York-Las Vegas flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Islip, New York-Las Vegas flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Islip, New York-Las Vegas flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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, January is the cheapest month in which you can book a flight from Islip, New York to Las Vegas (average of $82). Flying from Islip, New York to Las Vegas in July is currently the most expensive (average of $136). 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 November 18, 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 14% 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 November 18, 2025.
See what other customers who have flown with Southwest, JetBlue, 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
4,248 reviews

Crew

8.6

Boarding

8.1

Entertainment

7.5

Overall

8.0

Comfort

8.0

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Southwest
8.0
Very good
4,248 reviews
Southwest
8.0
Very good
4,248 reviews

Crew

8.6

Boarding

8.1

Entertainment

7.5

Overall

8.0

Comfort

8.0

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
JetBlue
7.2
Good
2,903 reviews
Southwest
8.0
Very good
4,248 reviews

Crew

8.6

Boarding

8.1

Entertainment

7.5

Overall

8.0

Comfort

8.0

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Frontier
5.8
Fair
3,105 reviews
Southwest
8.0
Very good
4,248 reviews

Crew

8.6

Boarding

8.1

Entertainment

7.5

Overall

8.0

Comfort

8.0

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

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.

  • How long is the flight from Islip, New York to Las Vegas?

    There are many flights that can get you from Islip, New York to Las Vegas in 16h 54m. Fly via Frontier to get the fastest option. Islip, New York and Las Vegas are separated by a distance of 2275 mi.

  • 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. Additional round-trip tickets that might be worth considering are offered by JetBlue and Southwest, with the lowest prices starting at $169 and $380, respectively. These flights start at 70% 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, January is the cheapest month in which you can book a flight from Islip, New York to Las Vegas (average of $82). Flying from Islip, New York to Las Vegas in July is currently the most expensive (average of $136). 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
Paradise
Henderson
North Las Vegas
Winchester
Kingman
Sunrise Manor
Primm
Mount Charleston
Mesquite
Needles
Boulder City

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Top 3 airlines flying from Islip to Las Vegas

Discover the top 3 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 November 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$150Average$321FlexibilityNo cancel feeOn-time62%
JetBlueCheapest$169Average$370FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$380Average$502FlexibilityNo cancel feeOn-time63%

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