Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Islip to Las Vegas from $146

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Islip to Las Vegas departing on 10/21. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Islip to Las Vegas (ISP-LAS)

Cheap round-trip flights

Frontier Logo
5:05 pm - 9:10 amISP-LAS
19h 05m1 stop
Frontier Logo
11:04 pm - 10:40 amLAS-ISP
8h 36m1 stop
$181Frontier
Find Deal
Sat, Sep 13 - Tue, Sep 16
Frontier Logo
5:05 pm - 3:39 pmISP-LAS
25h 34m1 stop
Frontier Logo
11:04 pm - 10:40 amLAS-ISP
8h 36m1 stop
$196Frontier
Find Deal
Mon, Sep 8 - Thu, Sep 11
Frontier Logo
4:58 pm - 11:52 pmISP-LAS
9h 54m1 stop
Frontier Logo
11:02 pm - 10:37 amLAS-ISP
8h 35m1 stop
$204Frontier
Find Deal
Sat, Oct 25 - Thu, Oct 30
Frontier Logo
5:05 pm - 3:39 pmISP-LAS
25h 34m1 stop
Frontier Logo
11:04 pm - 10:55 amLAS-ISP
8h 51m1 stop
$214Frontier
Find Deal
Mon, Sep 22 - Wed, Sep 24
Frontier Logo
5:05 pm - 3:39 pmISP-LAS
25h 34m1 stop
Frontier Logo
11:04 pm - 10:55 amLAS-ISP
8h 51m1 stop
$217Frontier
Find Deal
Mon, Sep 8 - Fri, Sep 12
JetBlue Logo
1:57 pm - 8:47 pmISP-LAS
9h 50m1 stop
JetBlue Logo
10:10 pm - 9:55 amLAS-ISP
8h 45m1 stop
$288JetBlue
Find Deal
Mon, Oct 27 - Fri, Oct 31
Logo
11:35 am - 4:16 pmISP-LAS
31h 41m2 stops
Logo
10:36 am - 10:55 amLAS-ISP
21h 19m1 stop
$302
Find Deal
Sun, Sep 7 - Fri, Sep 12
Logo
4:58 pm - 10:46 amISP-LAS
20h 48m2 stops
Logo
8:25 am - 10:37 amLAS-ISP
23h 12m1 stop
$311
Find Deal
Mon, Nov 3 - Thu, Nov 6
Southwest Logo
4:55 pm - 11:00 pmISP-LAS
9h 05m2 stops
Southwest Logo
6:05 am - 4:15 pmLAS-ISP
7h 10m1 stop
$318Southwest
Find Deal
Wed, Oct 29 - Sat, Nov 1
Southwest Logo
4:55 pm - 11:00 pmISP-LAS
9h 05m2 stops
Southwest Logo
11:40 pm - 12:15 pmLAS-ISP
9h 35m2 stops
$323Southwest
Find Deal
Wed, Oct 29 - Mon, Nov 3

Frontier flights from Islip to Las Vegas

Our best Frontier deals on Islip to Las Vegas flight tickets
Frontier
Sep 13
ISP5:05 pmIslip Long Island
19h 05m
1 stop
LAS9:10 amLas Vegas Harry Reid Intl
Sep 16
LAS11:04 pmLas Vegas Harry Reid Intl
8h 36m
1 stop
ISP10:40 amIslip Long Island
$181
Find similar
Frontier
Sep 8
ISP5:05 pmIslip Long Island
25h 34m
1 stop
LAS3:39 pmLas Vegas Harry Reid Intl
Sep 11
LAS11:04 pmLas Vegas Harry Reid Intl
8h 36m
1 stop
ISP10:40 amIslip Long Island
$196
Find similar
Frontier
Oct 25
ISP4:58 pmIslip Long Island
9h 54m
1 stop
LAS11:52 pmLas Vegas Harry Reid Intl
Oct 30
LAS11:02 pmLas Vegas Harry Reid Intl
8h 35m
1 stop
ISP10:37 amIslip Long Island
$204
Find similar

Southwest flights from Islip to Las Vegas

Our best Southwest deals on Islip to Las Vegas flight tickets
Southwest
Oct 29
ISP4:55 pmIslip Long Island
9h 05m
2 stops
LAS11:00 pmLas Vegas Harry Reid Intl
Nov 1
LAS6:05 amLas Vegas Harry Reid Intl
7h 10m
1 stop
ISP4:15 pmIslip Long Island
$318
Find similar
Southwest
Oct 29
ISP4:55 pmIslip Long Island
9h 05m
2 stops
LAS11:00 pmLas Vegas Harry Reid Intl
Nov 3
LAS11:40 pmLas Vegas Harry Reid Intl
9h 35m
2 stops
ISP12:15 pmIslip Long Island
$323
Find similar
Southwest
Nov 12
ISP12:55 pmIslip Long Island
8h 55m
1 stop
LAS6:50 pmLas Vegas Harry Reid Intl
Nov 15
LAS7:30 amLas Vegas Harry Reid Intl
11h 15m
2 stops
ISP9:45 pmIslip Long Island
$335
Find similar

momondo 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, momondo users made 832,500 searches. Data last updated August 28, 2025.
Use the filters below to find and compare flights from Islip to Las Vegas that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Sat 9/13

5:05 pm-9:10 am

1 stop19h 05m

Las Vegas Harry Reid Intl

Tue 9/16

11:04 pm-10:40 am

1 stop8h 36m

$181

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Mon 9/8

5:05 pm-3:39 pm

1 stop25h 34m

Las Vegas Harry Reid Intl

Thu 9/11

11:04 pm-10:40 am

1 stop8h 36m

$196

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

Thu 10/30

11:02 pm-10:37 am

1 stop8h 35m

$204

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Mon 9/22

5:05 pm-3:39 pm

1 stop25h 34m

Las Vegas Harry Reid Intl

Wed 9/24

11:04 pm-10:55 am

1 stop8h 51m

$214

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Mon 9/8

5:05 pm-3:39 pm

1 stop25h 34m

Las Vegas Harry Reid Intl

Fri 9/12

11:04 pm-10:55 am

1 stop8h 51m

$217

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Mon 10/27

1:57 pm-8:47 pm

1 stop9h 50m

Las Vegas Harry Reid Intl

Fri 10/31

10:10 pm-9:55 am

1 stop8h 45m

$288

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Sun 9/7

11:35 am-4:16 pm

2 stops31h 41m

Las Vegas Harry Reid Intl

Fri 9/12

10:36 am-10:55 am

1 stop21h 19m

$302

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Mon 11/3

4:58 pm-10:46 am

2 stops20h 48m

Las Vegas Harry Reid Intl

Thu 11/6

8:25 am-10:37 am

1 stop23h 12m

$311

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Wed 10/29

4:55 pm-11:00 pm

2 stops9h 05m

Las Vegas Harry Reid Intl

Sat 11/1

6:05 am-4:15 pm

1 stop7h 10m

$318

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Wed 10/29

4:55 pm-11:00 pm

2 stops9h 05m

Las Vegas Harry Reid Intl

Mon 11/3

11:40 pm-12:15 pm

2 stops9h 35m

$323

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

See travel insights to Las Vegas from

How to get the cheapest flight ticket from Islip to Las Vegas

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Las Vegas?

The month of October is, on average, the cheapest month to fly to Las Vegas from Islip, with most prices found around $395. The month of August is another great option to travel to Las Vegas, with average flight prices from Islip averaging around $398.

What is the cheapest day to depart on your flight to Las Vegas?

Our data shows that Tuesday is the least expensive day to fly to Las Vegas. Tickets to fly out on this day can be as low as $287. Flights from Islip to Las Vegas on a Thursday will generally be more expensive and average around $365. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Las Vegas?

The cheapest time of day to fly to Las Vegas is in the morning when flights can be purchased for as low as $317. Flights to Las Vegas are more costly at noon, with an average ticket price of $380. Departure times at noon fall within the peak daily travel times, which is why tickets can be more expensive.

Can stopping save me money on Islip to Las Vegas flights?

You could potentially save up to 55% on your flight if you consider stops on a Islip to Las Vegas flight.

When to book flights from Islip to Las Vegas

Are you open to changing your travel dates? Check out the ideal times to fly from Islip to Las Vegas according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Islip to Las Vegas (ISP to LAS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Islip to Las Vegas

Direct flights

None
There are no direct flights from Islip to Las Vegas. There are no popular flight routes from Islip to Las Vegas.
Search flight deals

  • How far is Islip Long Island to Las Vegas Harry Reid Intl by plane?

    A flight from Islip Long Island to Las Vegas Harry Reid Intl will travel around 2267.0 mi. 8h 55m is a normal flight duration for this route.

  • When did momondo last update prices for flights from Islip Long Island Airport to Las Vegas Harry Reid Intl Airport?

    Prices for flights from Islip Long Island Airport to Las Vegas Harry Reid Intl Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Islip Long Island Airport to Las Vegas Harry Reid Intl Airport?

  • How old do you have to be to fly from Islip Long Island Airport to Las Vegas Harry Reid Intl Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Islip Long Island Airport to Las Vegas Harry Reid Intl Airport.

  • What documentation or ID do you need to fly to Las Vegas Harry Reid Intl Airport?

    The necessary travel and health documents for your Las Vegas Harry Reid Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from Islip to Las Vegas?

Best airlines flying from Islip to Las Vegas

Compare and see reviews for airlines that fly from Islip to Las Vegas with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $150Free CancellationRating
5.8
3,204 reviews
Search Frontier flights
SouthwestPriceFrom $388Free CancellationRating
8.0
4,242 reviews
Search Southwest flights

Traveling to a place near Las Vegas?

Book flights to Las Vegas if you plan to visit one of these locations
Laughlin
Mount Charleston
Henderson
Mesquite
North Las Vegas
Paradise
Kingman
Pahrump
Primm
Furnace Creek
Boulder City
Winchester
Sunrise Manor
Needles

Why use momondo?

Why should I use momondo to find a flight deal from Islip to Las Vegas?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Islip to Las Vegas. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Islip to Las Vegas with flexible booking policies on momondo?

Yes. All flights to Las Vegas from Islip on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Islip to Las Vegas?

Once you have performed a search for Islip to Las Vegas flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Islip to Las Vegas right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Islip to Las Vegas flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

An easier way to manage your Las Vegas trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Tue 9/2
Tue 9/9
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States