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$146+ 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 10/28. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — LAS
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
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 September 15, 2025.

Round-trip from

$181
(CheapOair)

One-way from

$160
(CheapOair)

Popular in

June

Cheapest in

January

Average price

$442
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. 11% potential increase in price ($63 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($19 potential savings vs. average RT price).
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Average for round-trip flights in September 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 September 15, 2025.

This CheapOair deal was found by Cheapflights users on 9/14. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/199:47 pmISP - LAS
1 stop30h 07mFrontier
Wed 10/2210:16 pmLAS - ISP
1 stop19h 26mFrontier
Deal found 9/14$181
This Cheapflightsfares deal was found by Cheapflights users on 9/15. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/254:58 pmISP - LAS
1 stop9h 54mFrontier
Thu 10/3011:02 pmLAS - ISP
1 stop8h 35mFrontier
Deal found 9/15$183
This Frontier deal was found by Cheapflights users on 9/15. 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 10/199:47 pmISP - LAS
1 stop14h 48mFrontier
Thu 10/3011:02 pmLAS - ISP
1 stop8h 35mFrontier
Deal found 9/15$191
This Frontier deal was found by Cheapflights users on 9/15. 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 10/199:47 pmISP - LAS
1 stop14h 48mFrontier
Tue 11/48:00 amLAS - ISP
2 stops23h 37mFrontier
Deal found 9/15$212
This CheapOair deal was found by Cheapflights users on 9/14. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/65:05 pmISP - LAS
1 stop19h 22mFrontier
Mon 10/1310:16 pmLAS - ISP
1 stop19h 26mFrontier
Deal found 9/14$214
This Frontier deal was found by Cheapflights users on 9/13. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/275:05 pmISP - LAS
2 stops17h 57mFrontier
Tue 9/3011:04 pmLAS - ISP
1 stop8h 36mFrontier
Deal found 9/13$218
This Frontier deal was found by Cheapflights users on 9/15. 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.
Thu 10/239:37 pmISP - LAS
2 stops24h 26mFrontier
Fri 10/3111:02 pmLAS - ISP
1 stop8h 35mFrontier
Deal found 9/15$219
This CheapOair deal was found by Cheapflights users on 9/14. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/65:05 pmISP - LAS
1 stop19h 22mFrontier
Thu 10/910:16 pmLAS - ISP
1 stop9h 21mFrontier
Deal found 9/14$227
This Frontier deal was found by Cheapflights users on 9/15. 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.
Fri 10/244:58 pmISP - LAS
1 stop10h 56mFrontier
Fri 10/3111:02 pmLAS - ISP
1 stop8h 35mFrontier
Deal found 9/15$234
This Frontier deal was found by Cheapflights users on 9/15. 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.
Mon 10/209:49 amISP - LAS
2 stops16h 51mFrontier
Thu 10/302:45 pmLAS - ISP
2 stops16h 52mFrontier
Deal found 9/15$236

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 September 15, 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 9/29

5:05 pm-3:39 pm

1 stop25h 34m

Las Vegas Harry Reid Intl

Wed 10/1

11:04 pm-10:55 am

1 stop8h 51m

$181

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Mon 10/20

4:58 pm-12:54 am

1 stop10h 56m

Las Vegas Harry Reid Intl

Thu 10/23

10:16 pm-10:37 am

1 stop9h 21m

$181

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Mon 10/20

4:58 pm-12:54 am

1 stop10h 56m

Las Vegas Harry Reid Intl

Mon 11/3

10:58 pm-5:42 pm

2 stops15h 44m

$218

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Mon 10/6

5:05 pm-9:27 am

1 stop19h 22m

Las Vegas Harry Reid Intl

Thu 10/9

10:16 pm-10:37 am

1 stop9h 21m

$227

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Fri 10/10

4:58 pm-9:27 am

1 stop19h 29m

Las Vegas Harry Reid Intl

Fri 10/17

10:16 pm-10:37 am

1 stop9h 21m

$258

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Wed 10/29

4:58 pm-10:07 am

1 stop20h 09m

Las Vegas Harry Reid Intl

Wed 11/5

11:02 pm-5:42 pm

1 stop15h 40m

$274

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Sat 10/25

4:58 pm-11:52 pm

1 stop9h 54m

Las Vegas Harry Reid Intl

Tue 10/28

11:02 pm-10:37 am

1 stop8h 35m

$275

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Wed 10/29

4:58 pm-8:02 am

2 stops18h 04m

Las Vegas Harry Reid Intl

Mon 11/3

10:58 pm-5:42 pm

2 stops15h 44m

$277

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Mon 10/27

9:49 am-11:36 pm

2 stops16h 47m

Las Vegas Harry Reid Intl

Thu 10/30

2:45 pm-10:37 am

2 stops16h 52m

$277

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Sat 10/18

4:58 pm-9:27 am

1 stop19h 29m

Las Vegas Harry Reid Intl

Mon 10/20

10:16 pm-8:42 pm

1 stop19h 26m

$281

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/13

Showing 1-10 of 20 results
1
2

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, August is the cheapest month in which you can book a flight from Islip to Las Vegas (average of $198). Flying from Islip to Las Vegas in March is currently the most expensive (average of $269). 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 September 15, 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 15% 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 September 15, 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
4,242 reviews

Overall

8.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Entertainment

7.5

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
4,242 reviews
Southwest
8.0
Very good
4,242 reviews

Overall

8.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Entertainment

7.5

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
3,172 reviews
Southwest
8.0
Very good
4,242 reviews

Overall

8.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Entertainment

7.5

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 to Las Vegas?

    There are many flights that can get you from Islip to Las Vegas in 25h 34m. 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, August is the cheapest month in which you can book a flight from Islip to Las Vegas (average of $198). Flying from Islip to Las Vegas in March is currently the most expensive (average of $269). 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

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Alternative routes for Islip to Las Vegas

See prices for flight routes from nearby airports that may be better suited for you.
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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 September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$150Average$278FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$384Average$495FlexibilityNo cancel feeOn-time63%

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