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$79+ 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 2/21. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — LAS
Feb 7 — Feb 141
Sat 2/7
Sat 2/14
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 January 8, 2026.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$145
(CheapOair)

One-way from

$79
(CheapOair)

Popular in

November

Cheapest in

January

Average price

$366
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. 16% potential increase in price ($103 potential increase over avg. RT price).
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Cheapest flight prices on average. 7% potential price decrease ($33 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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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 January 8, 2026.

This CheapOair deal was found by Cheapflights users on 1/7. 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 2/2812:01 pmISP - LAS
1 stop25h 14mFrontier
Wed 3/411:03 pmLAS - ISP
1 stop12h 36mFrontier
Deal found 1/7$145
This CheapOair deal was found by Cheapflights users on 1/5. 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 2/288:23 pmISP - LAS
1 stop16h 52mFrontier
Mon 3/211:03 pmLAS - ISP
1 stop30h 37mFrontier
Deal found 1/5$165
This CheapOair deal was found by Cheapflights users on 1/7. 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 2/228:33 amISP - LAS
1 stop29h 38mFrontier
Thu 2/2611:03 pmLAS - ISP
1 stop12h 36mFrontier
Deal found 1/7$178
This CheapOair deal was found by Cheapflights users on 1/6. 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 2/238:23 amISP - LAS
1 stop28h 52mFrontier
Wed 3/411:03 pmLAS - ISP
1 stop12h 36mFrontier
Deal found 1/6$186
This Expedia deal was found by Cheapflights users on 1/6. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/218:23 pmISP - LAS
1 stop16h 52mFrontier
Mon 2/2311:03 pmLAS - ISP
1 stop30h 37mFrontier
Deal found 1/6$201
This CheapOair deal was found by Cheapflights users on 1/6. 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 2/263:34 pmISP - LAS
1 stop21h 41mFrontier
Sat 2/2811:03 pmLAS - ISP
1 stop14h 58mFrontier
Deal found 1/6$202
This CheapOair deal was found by Cheapflights users on 1/7. 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 2/238:23 amISP - LAS
1 stop28h 52mFrontier
Fri 2/2711:03 pmLAS - ISP
1 stop17h 25mFrontier
Deal found 1/7$211
This CheapOair deal was found by Cheapflights users on 1/6. 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 2/278:33 amISP - LAS
1 stop28h 58mFrontier
Mon 3/211:03 pmLAS - ISP
1 stop30h 37mFrontier
Deal found 1/6$216
This Frontier deal was found by Cheapflights users on 1/7. 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 3/91:22 pmISP - LAS
1 stop12h 27mFrontier
Thu 3/1211:59 pmLAS - ISP
1 stop9h 48mFrontier
Deal found 1/7$219
This CheapOair deal was found by Cheapflights users on 1/7. 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 3/231:22 pmISP - LAS
1 stop25h 33mFrontier
Thu 3/261:36 pmLAS - ISP
1 stop20h 11mFrontier
Deal found 1/7$221
This Kiwi.com deal was found by Cheapflights users on 1/7. 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 2/2111:41 amISP - LAS
2 stops39h 03mFrontier
Sat 2/2811:03 pmLAS - ISP
1 stop29h 35mFrontier
Deal found 1/7$228
This CheapOair deal was found by Cheapflights users on 1/6. 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 2/278:33 amISP - LAS
1 stop28h 58mFrontier
Wed 3/1112:40 pmLAS - ISP
1 stop24h 33mFrontier
Deal found 1/6$231

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 January 8, 2026.
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 2/22

8:33 am-11:11 am

1 stop29h 38m

Las Vegas Harry Reid Intl

Thu 2/26

11:03 pm-2:39 pm

1 stop12h 36m

$178

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Mon 2/23

8:23 am-10:15 am

1 stop28h 52m

Las Vegas Harry Reid Intl

Wed 3/4

11:03 pm-2:39 pm

1 stop12h 36m

$186

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Fri 2/27

8:33 am-10:31 am

1 stop28h 58m

Las Vegas Harry Reid Intl

Mon 3/2

11:03 pm-8:40 am

1 stop30h 37m

$216

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Mon 3/9

1:22 pm-10:49 pm

1 stop12h 27m

Las Vegas Harry Reid Intl

Thu 3/12

11:59 pm-12:47 pm

1 stop9h 48m

$219

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Sat 2/21

11:41 am-11:44 pm

2 stops39h 03m

Las Vegas Harry Reid Intl

Sat 2/28

11:03 pm-7:38 am

1 stop29h 35m

$228

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Fri 2/27

8:33 am-10:31 am

1 stop28h 58m

Las Vegas Harry Reid Intl

Wed 3/11

12:40 pm-4:13 pm

1 stop24h 33m

$231

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Fri 2/27

8:33 am-10:31 am

1 stop28h 58m

Las Vegas Harry Reid Intl

Sat 2/28

11:03 pm-5:01 pm

1 stop14h 58m

$237

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Sun 3/22

4:34 pm-10:49 pm

1 stop9h 15m

Las Vegas Harry Reid Intl

Wed 3/25

11:59 pm-4:13 pm

1 stop13h 14m

$245

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Fri 3/27

1:42 pm-10:49 pm

1 stop12h 07m

Las Vegas Harry Reid Intl

Wed 4/1

10:20 pm-7:11 pm

1 stop17h 51m

$246

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Sat 2/28

8:23 pm-10:15 am

1 stop16h 52m

Las Vegas Harry Reid Intl

Sun 3/1

11:03 pm-2:39 pm

1 stop12h 36m

$250

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/6

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 January.
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 $78). 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.

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 January 8, 2026.
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
4,250 reviews

Crew

8.6

Comfort

8.0

Food

7.0

Overall

8.0

Boarding

8.1

Entertainment

7.5

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
8.0
Very good
4,250 reviews
Southwest
8.0
Very good
4,250 reviews

Crew

8.6

Comfort

8.0

Food

7.0

Overall

8.0

Boarding

8.1

Entertainment

7.5

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
2,892 reviews
Southwest
8.0
Very good
4,250 reviews

Crew

8.6

Comfort

8.0

Food

7.0

Overall

8.0

Boarding

8.1

Entertainment

7.5

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
5.7
Fair
3,061 reviews
Southwest
8.0
Very good
4,250 reviews

Crew

8.6

Comfort

8.0

Food

7.0

Overall

8.0

Boarding

8.1

Entertainment

7.5

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 29h 38m. 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 $78). 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
Boulder City
Needles

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See prices for flight routes from nearby airports that may be better suited for you.
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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 January 8, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$150Average$248FlexibilityNo cancel feeOn-time62%
JetBlueCheapest$169Average$370FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$380Average$526FlexibilityNo cancel feeOn-time63%

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