HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Las Vegas

$96+ Cheap flights from Islip 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 11/17. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — LAS
Nov 15 — Nov 221
Sat 11/15
Sat 11/22
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 October 16, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$180
(CheapOair)

One-way from

$96
(CheapOair)

Popular in

June

Cheapest in

October

Average price

$393
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. 11% potential increase in price ($60 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($19 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 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 October 16, 2025.

This CheapOair deal was found by Cheapflights users on 10/15. 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.
Mon 11/34:58 pmISP - LAS
1 stop20h 09mFrontier
Wed 11/1211:02 pmLAS - ISP
1 stop15h 40mFrontier
Deal found 10/15$180
This CheapOair deal was found by Cheapflights users on 10/16. 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.
Thu 11/136:37 pmISP - LAS
1 stop18h 30mFrontier
Mon 11/1711:02 pmLAS - ISP
1 stop15h 40mFrontier
Deal found 10/16$210
This Kiwi.com deal was found by Cheapflights users on 10/16. 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.
Thu 11/136:37 pmISP - LAS
2 stops42h 54mFrontier
Thu 11/207:00 amLAS - ISP
1 stop24h 37mFrontier
Deal found 10/16$221
This Kiwi.com deal was found by Cheapflights users on 10/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/224:58 pmISP - LAS
2 stops32h 07mFrontier
Wed 10/2911:02 pmLAS - ISP
1 stop15h 40mFrontier
Deal found 10/15$229
This Kiwi.com deal was found by Cheapflights users on 10/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/116:27 pmISP - LAS
2 stops32h 09mFrontier
Tue 11/1811:02 pmLAS - ISP
1 stop8h 35mFrontier
Deal found 10/14$231
This CheapOair deal was found by Cheapflights users on 10/13. 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 11/154:58 pmISP - LAS
1 stop20h 09mFrontier
Tue 11/1811:02 pmLAS - ISP
1 stop8h 35mFrontier
Deal found 10/13$257
This CheapOair deal was found by Cheapflights users on 10/13. 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 12/139:09 pmISP - LAS
1 stop15h 34mFrontier
Thu 12/1810:30 pmLAS - ISP
1 stop18h 44mFrontier
Deal found 10/13$262
This CheapOair deal was found by Cheapflights users on 10/16. 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 11/144:58 pmISP - LAS
1 stop20h 09mFrontier
Mon 11/1711:02 pmLAS - ISP
1 stop15h 40mFrontier
Deal found 10/16$266
This Kiwi.com deal was found by Cheapflights users on 10/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/224:58 pmISP - LAS
1 stop31h 21mMultiple Airlines
Wed 10/2911:02 pmLAS - ISP
1 stop15h 40mMultiple Airlines
Deal found 10/15$272
This CheapOair deal was found by Cheapflights users on 10/16. 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 11/154:58 pmISP - LAS
1 stop20h 09mFrontier
Wed 11/193:59 pmLAS - ISP
1 stop14h 08mFrontier
Deal found 10/16$286

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 October 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

Mon 11/17

4:58 pm-10:07 am

1 stop20h 09m

Las Vegas Harry Reid Intl

Thu 11/20

11:00 pm-10:37 am

1 stop8h 37m

$180

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Thu 11/13

6:37 pm-10:07 am

1 stop18h 30m

Las Vegas Harry Reid Intl

Mon 11/17

11:02 pm-5:42 pm

1 stop15h 40m

$210

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Tue 11/11

6:27 pm-11:36 pm

2 stops32h 09m

Las Vegas Harry Reid Intl

Tue 11/18

11:02 pm-10:37 am

1 stop8h 35m

$231

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Sat 11/15

4:58 pm-10:07 am

1 stop20h 09m

Las Vegas Harry Reid Intl

Tue 11/18

11:02 pm-10:37 am

1 stop8h 35m

$257

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Sat 11/15

4:58 pm-10:07 am

1 stop20h 09m

Las Vegas Harry Reid Intl

Wed 11/19

3:59 pm-9:07 am

1 stop14h 08m

$286

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Tue 10/21

9:37 pm-9:27 am

1 stop14h 50m

Las Vegas Harry Reid Intl

Tue 10/28

11:02 pm-10:37 am

1 stop8h 35m

$314

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Sat 11/15

4:58 pm-10:07 am

1 stop20h 09m

Las Vegas Harry Reid Intl

Sat 11/22

7:00 am-10:09 am

1 stop24h 09m

$329

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Mon 11/10

8:02 pm-10:07 am

1 stop17h 05m

Las Vegas Harry Reid Intl

Sun 11/16

11:02 pm-10:37 am

1 stop8h 35m

$335

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Fri 12/5

10:06 am-9:43 am

1 stop26h 37m

Las Vegas Harry Reid Intl

Sun 12/7

10:30 pm-8:14 pm

1 stop18h 44m

$336

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Sat 12/20

8:52 pm-9:38 am

1 stop15h 46m

Las Vegas Harry Reid Intl

Mon 12/22

3:54 pm-11:25 am

1 stop16h 31m

$336

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/16

Showing 1-10 of 22 results
1
2
3

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 October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
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-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-Las Vegas flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Islip-Las Vegas flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Islip-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-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 to Las Vegas?

Currently, January is the cheapest month in which you can book a flight from Islip to Las Vegas (average of $83). Flying from Islip 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 October 16, 2025.

When flying from Islip 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 October 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
4,241 reviews

Overall

8.0

Comfort

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

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
4,241 reviews
Southwest
8.0
Very good
4,241 reviews

Overall

8.0

Comfort

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

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
3,137 reviews
Southwest
8.0
Very good
4,241 reviews

Overall

8.0

Comfort

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

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 to Las Vegas?

    There are many flights that can get you from Islip to Las Vegas in 20h 09m. Fly via Frontier to get the fastest option. Islip and Las Vegas are separated by a distance of 2275 mi.

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

    Frontier, at $150, was found to be the cheapest airline from Islip to Las Vegas. An alternate airline flying to your destination would be Southwest. You may be able to fly from Islip to Las Vegas for 68% less than the average price by searching for these airlines.

  • 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 to Las Vegas?

    Currently, January is the cheapest month in which you can book a flight from Islip to Las Vegas (average of $83). Flying from Islip 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
Sunrise Manor
Winchester
Kingman
Primm
Mount Charleston
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
Albany to Las Vegas flights
John F Kennedy Intl to Reno flights
Rochester to Las Vegas flights
Newark to Reno flights
Syracuse to Las Vegas flights
LaGuardia to Reno flights
White Plains to Las Vegas flights
Stewart to Las Vegas flights
Syracuse to Reno flights
Albany to Reno flights
Ithaca to Las Vegas flights
Rochester to Reno flights
Binghamton to Las Vegas flights
Watertown to Las Vegas flights
White Plains to Reno flights
Elmira to Las Vegas flights
Buffalo to Reno flights
Rutland to Las Vegas flights
Plattsburgh to Las Vegas flights
Saranac Lake to Las Vegas flights
Newark to Twin Falls flights
Buffalo to Twin Falls flights
Ithaca to Reno flights
LaGuardia to Twin Falls flights
Binghamton to Reno flights
John F Kennedy Intl to Elko flights
Rochester to Twin Falls flights
Newark to Elko flights
Syracuse to Twin Falls flights
Ogdensburg to Las Vegas flights
Niagara Falls to Las Vegas 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 October 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$150Average$278FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$380Average$494FlexibilityNo 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.