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$81+ 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 3/4. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — LAS
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
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Cheap 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 December 18, 2025.

This CheapOair deal was found by Cheapflights users on 12/15. 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.
Sun 12/218:35 pmISP - LAS
1 stop15h 40mFrontier
Sun 1/1110:45 pmLAS - ISP
1 stop18h 06mFrontier
Deal found 12/15$318
This Frontier deal was found by Cheapflights users on 12/15. 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.
Sun 12/218:35 pmISP - LAS
1 stop15h 40mFrontier
Wed 12/3110:20 pmLAS - ISP
1 stop10h 05mFrontier
Deal found 12/15$382
This Frontier deal was found by Cheapflights users on 12/16. 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.
Mon 12/228:35 pmISP - LAS
1 stop16h 08mFrontier
Wed 12/2410:20 pmLAS - ISP
1 stop10h 05mFrontier
Deal found 12/16$383
This Frontier deal was found by Cheapflights users on 12/16. 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.
Mon 12/228:35 pmISP - LAS
1 stop16h 08mFrontier
Sun 12/2810:20 pmLAS - ISP
1 stop11h 49mFrontier
Deal found 12/16$387
This CheapOair deal was found by Cheapflights users on 12/16. 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.
Mon 12/228:35 pmISP - LAS
1 stop16h 08mFrontier
Fri 12/2610:05 pmLAS - ISP
1 stop16h 50mFrontier
Deal found 12/16$388
This CheapOair deal was found by Cheapflights users on 12/17. 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 12/222:04 pmISP - LAS
1 stop22h 39mFrontier
Wed 12/3110:20 pmLAS - ISP
1 stop10h 05mFrontier
Deal found 12/17$408
This CheapOair deal was found by Cheapflights users on 12/16. 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 12/191:27 pmISP - LAS
1 stop21h 58mFrontier
Mon 12/2210:20 pmLAS - ISP
1 stop10h 05mFrontier
Deal found 12/16$413
This CheapOair deal was found by Cheapflights users on 12/16. 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 12/176:00 amISP - LAS
1 stop30h 43mFrontier
Wed 12/2410:20 pmLAS - ISP
1 stop10h 05mFrontier
Deal found 12/16$414
This Frontier deal was found by Cheapflights users on 12/16. 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.
Sun 12/218:35 pmISP - LAS
1 stop15h 40mFrontier
Sun 12/2810:20 pmLAS - ISP
1 stop11h 49mFrontier
Deal found 12/16$417
This CheapOair deal was found by Cheapflights users on 12/16. 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 12/198:35 pmISP - LAS
1 stop14h 50mFrontier
Fri 12/2610:05 pmLAS - ISP
1 stop16h 50mFrontier
Deal found 12/16$418
This CheapOair deal was found by Cheapflights users on 12/16. 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.
Tue 12/3012:20 pmISP - LAS
1 stop24h 23mFrontier
Thu 1/111:03 pmLAS - ISP
1 stop17h 37mFrontier
Deal found 12/16$434

Find 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 December 18, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$182
(Expedia)

One-way from

$81
(CheapOair)

Popular in

November

Cheapest in

January

Average price

$595
Provider with most accurate pricing for Islip Long Island-Las Vegas Harry Reid Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Islip Long Island-Las Vegas Harry Reid Intl flights.
Search Deals
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. 18% potential increase in price ($114 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($32 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

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 December 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

Sat 2/21

11:41 am-10:15 am

1 stop25h 34m

Las Vegas Harry Reid Intl

Sat 2/28

11:03 pm-7:38 am

1 stop29h 35m

$183

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Sat 2/21

11:41 am-10:15 am

1 stop25h 34m

Las Vegas Harry Reid Intl

Wed 2/25

11:03 pm-2:39 pm

1 stop12h 36m

$204

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Sun 2/22

8:33 am-11:11 am

1 stop29h 38m

Las Vegas Harry Reid Intl

Sat 2/28

11:03 pm-7:38 am

1 stop29h 35m

$238

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Wed 1/14

8:00 am-10:10 am

1 stop29h 10m

Las Vegas Harry Reid Intl

Fri 1/16

11:03 pm-10:46 pm

1 stop20h 43m

$252

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Mon 3/9

1:22 pm-11:30 am

1 stop25h 08m

Las Vegas Harry Reid Intl

Thu 3/12

12:40 pm-12:47 pm

1 stop21h 07m

$271

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Sun 3/15

4:34 pm-10:49 pm

1 stop9h 15m

Las Vegas Harry Reid Intl

Thu 3/19

11:59 pm-12:47 pm

1 stop9h 48m

$352

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Fri 1/2

8:35 pm-8:25 am

1 stop14h 50m

Las Vegas Harry Reid Intl

Sun 1/4

10:20 pm-1:09 pm

1 stop11h 49m

$368

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Mon 2/2

3:45 pm-8:55 pm

1 stop8h 10m

Las Vegas Harry Reid Intl

Thu 2/5

6:35 am-4:25 pm

1 stop6h 50m

$373

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Mon 3/9

1:22 pm-11:30 am

1 stop25h 08m

Las Vegas Harry Reid Intl

Thu 3/12

11:59 pm-1:31 pm

2 stops10h 32m

$375

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Wed 1/21

12:25 pm-8:13 pm

1 stop10h 48m

Las Vegas Harry Reid Intl

Tue 1/27

9:55 pm-8:52 am

1 stop7h 57m

$383

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/17

Showing 1-10 of 20 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 December.
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 $79). 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 December 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 December 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
7.9
Good
4,250 reviews

Food

7.0

Entertainment

7.5

Comfort

8.0

Crew

8.6

Overall

7.9

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Southwest
7.9
Good
4,250 reviews
Southwest
7.9
Good
4,250 reviews

Food

7.0

Entertainment

7.5

Comfort

8.0

Crew

8.6

Overall

7.9

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
JetBlue
7.2
Good
2,897 reviews
Southwest
7.9
Good
4,250 reviews

Food

7.0

Entertainment

7.5

Comfort

8.0

Crew

8.6

Overall

7.9

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Frontier
5.8
Fair
3,081 reviews
Southwest
7.9
Good
4,250 reviews

Food

7.0

Entertainment

7.5

Comfort

8.0

Crew

8.6

Overall

7.9

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

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 25h 34m. 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 $71. 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 86% 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 $79). 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
Kingman
Winchester
Primm
Sunrise Manor
Mesquite
Needles
Boulder City

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Alternative routes for Islip to Las Vegas

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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 December 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$150Average$248FlexibilityNo cancel feeOn-time62%
JetBlueCheapest$169Average$370FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$380Average$519FlexibilityNo cancel feeOn-time63%

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