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$100+ 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 4/16. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — LAS
Mar 5 — Mar 121
Thu 3/5
Thu 3/12
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 February 3, 2026.

This Frontier deal was found by Cheapflights users on 2/1. 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 pm
ISP
-
LAS
1 stop12h 27m
Frontier
Wed 3/2511:59 pm
LAS
-
ISP
1 stop13h 14m
Frontier
Deal found 2/1$209
This CheapOair deal was found by Cheapflights users on 2/2. 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 4/136:39 pm
ISP
-
LAS
1 stop19h 36m
Frontier
Fri 4/1711:59 pm
LAS
-
ISP
1 stop30h 14m
Frontier
Deal found 2/2$235
This CheapOair deal was found by Cheapflights users on 2/2. 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 2/273:34 pm
ISP
-
LAS
1 stop21h 57m
Frontier
Mon 3/211:03 pm
LAS
-
ISP
1 stop30h 37m
Frontier
Deal found 2/2$254
This Frontier deal was found by Cheapflights users on 2/1. 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 3/61:42 pm
ISP
-
LAS
1 stop12h 01m
Frontier
Wed 3/2511:59 pm
LAS
-
ISP
1 stop13h 14m
Frontier
Deal found 2/1$259
This Frontier deal was found by Cheapflights users on 2/2. 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 3/231:22 pm
ISP
-
LAS
1 stop12h 27m
Frontier
Wed 3/2511:59 pm
LAS
-
ISP
1 stop13h 14m
Frontier
Deal found 2/2$260
This CheapOair deal was found by Cheapflights users on 2/1. 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 2/233:59 pm
ISP
-
LAS
1 stop21h 16m
Frontier
Thu 2/2611:03 pm
LAS
-
ISP
1 stop12h 36m
Frontier
Deal found 2/1$277
This CheapOair deal was found by Cheapflights users on 2/2. 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 3/85:08 pm
ISP
-
LAS
1 stop21h 22m
Frontier
Thu 3/1211:59 pm
LAS
-
ISP
1 stop9h 48m
Frontier
Deal found 2/2$278
This Frontier deal was found by Cheapflights users on 2/2. 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 3/231:22 pm
ISP
-
LAS
1 stop12h 27m
Frontier
Thu 3/2611:59 pm
LAS
-
ISP
1 stop9h 48m
Frontier
Deal found 2/2$279
This CheapOair deal was found by Cheapflights users on 2/2. 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 4/304:07 pm
ISP
-
LAS
1 stop9h 29m
Frontier
Sat 5/211:59 pm
LAS
-
ISP
1 stop30h 14m
Frontier
Deal found 2/2$286
This CheapOair deal was found by Cheapflights users on 2/2. 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 2/259:33 am
ISP
-
LAS
1 stop27h 42m
Frontier
Fri 2/2711:03 pm
LAS
-
ISP
1 stop9h 03m
Frontier
Deal found 2/2$291
This CheapOair deal was found by Cheapflights users on 2/2. 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 pm
ISP
-
LAS
1 stop21h 41m
Frontier
Thu 3/511:59 pm
LAS
-
ISP
1 stop9h 48m
Frontier
Deal found 2/2$295
This Frontier deal was found by Cheapflights users on 2/2. 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 4/164:07 pm
ISP
-
LAS
1 stop9h 29m
Frontier
Sat 4/2511:34 pm
LAS
-
ISP
1 stop12h 21m
Frontier
Deal found 2/2$307

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 February 3, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$209
(Frontier)

One-way from

$100
(CheapOair)

Popular in

November

Cheapest in

January

Average price

$497
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. 16% potential increase in price ($98 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 February 2026
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 February 3, 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

Mon 4/13

6:39 pm-11:15 am

1 stop19h 36m

Las Vegas Harry Reid Intl

Fri 4/17

11:59 pm-9:13 am

1 stop30h 14m

$235

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Fri 2/27

3:34 pm-10:31 am

1 stop21h 57m

Las Vegas Harry Reid Intl

Mon 3/2

11:03 pm-8:40 am

1 stop30h 37m

$254

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Fri 3/6

1:42 pm-10:43 pm

1 stop12h 01m

Las Vegas Harry Reid Intl

Wed 3/11

11:59 pm-4:13 pm

1 stop13h 14m

$259

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Mon 3/23

1:22 pm-10:49 pm

1 stop12h 27m

Las Vegas Harry Reid Intl

Wed 3/25

11:59 pm-4:13 pm

1 stop13h 14m

$260

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Mon 2/23

3:59 pm-10:15 am

1 stop21h 16m

Las Vegas Harry Reid Intl

Thu 2/26

11:03 pm-2:39 pm

1 stop12h 36m

$277

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Thu 4/16

4:07 pm-10:36 pm

1 stop9h 29m

Las Vegas Harry Reid Intl

Sat 4/18

11:34 pm-2:55 pm

1 stop12h 21m

$277

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Sun 3/8

5:08 pm-11:30 am

1 stop21h 22m

Las Vegas Harry Reid Intl

Thu 3/12

11:59 pm-12:47 pm

1 stop9h 48m

$278

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Sun 4/26

4:07 pm-10:36 pm

1 stop9h 29m

Las Vegas Harry Reid Intl

Wed 4/29

11:34 pm-2:55 pm

1 stop12h 21m

$291

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Thu 4/16

4:07 pm-10:36 pm

1 stop9h 29m

Las Vegas Harry Reid Intl

Sat 4/25

11:34 pm-2:55 pm

1 stop12h 21m

$307

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Thu 4/16

4:07 pm-10:36 pm

1 stop9h 29m

Las Vegas Harry Reid Intl

Sun 4/19

11:34 pm-2:55 pm

1 stop12h 21m

$336

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/31

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 February.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice 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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Islip, New York-Las Vegas flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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 May is currently the most expensive (average of $141). 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.

How much does it cost to fly round-trip from Islip, New York to Las Vegas?

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 February 3, 2026.
See what other customers who have flown with Southwest and JetBlue 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
4,273 reviews

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Crew

8.6

Food

7.0

Overall

8.0

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
4,273 reviews
Southwest
8.0
Very good
4,273 reviews

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Crew

8.6

Food

7.0

Overall

8.0

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
2,893 reviews
Southwest
8.0
Very good
4,273 reviews

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Crew

8.6

Food

7.0

Overall

8.0

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 19h 36m. 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 JetBlue is currently your cheapest option to Las Vegas, with prices starting at $169. Another option worth looking into is Southwest, starting at $380 round trip. These flights start at 66% 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 May is currently the most expensive (average of $141). 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
Mesquite
Primm
Boulder City
Needles
Sunrise Manor

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.

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 February 3, 2026.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$169Average$370FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$380Average$526FlexibilityNo cancel feeOn-time63%

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