ISP - LAS

$90 Find Cheap Flights from Islip to Las Vegas

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Islip to Las Vegas departing on 3/2. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Las Vegas

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Islip to Las Vegas, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Islip to Las Vegas, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$229
Overall average: $497
Frontier
Fri 2/27Mon 3/2
ISP - LAS • 1 stop
Cheapest one-way
$90
Frontier
Mon 3/2
ISP - LAS • 1 stop
Top airlines
Frontier
Cheapest • from $229 (round-trip)
Southwest
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to travel
January
Cheapest • 28% price drop
April
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Las Vegas!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Islip to Las Vegas (ISP-LAS)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Islip to Las Vegas that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Islip to Las Vegas

Fri, Feb 27 - Mon, Mar 2
Frontier Logo
3:34 pm - 10:31 am
ISP
-
LAS
21h 57m
1 stop
Frontier Logo
11:03 pm - 8:40 am
LAS
-
ISP
30h 37m
1 stop
$229Frontier
Sun, Apr 26 - Wed, Apr 29
Frontier Logo
4:07 pm - 10:36 pm
ISP
-
LAS
9h 29m
1 stop
Frontier Logo
11:34 pm - 2:55 pm
LAS
-
ISP
12h 21m
1 stop
$256Frontier
Thu, Apr 16 - Sat, Apr 18
Frontier Logo
4:07 pm - 10:36 pm
ISP
-
LAS
9h 29m
1 stop
Frontier Logo
11:34 pm - 2:55 pm
LAS
-
ISP
12h 21m
1 stop
$277Frontier
Thu, Apr 23 - Sun, Apr 26
Frontier Logo
4:07 pm - 10:36 pm
ISP
-
LAS
9h 29m
1 stop
Frontier Logo
11:34 pm - 2:55 pm
LAS
-
ISP
12h 21m
1 stop
$290Frontier
Thu, Feb 19 - Tue, Feb 24
Frontier Logo
3:34 pm - 11:44 pm
ISP
-
LAS
35h 10m
2 stops
Frontier Logo
12:59 am - 2:39 pm
LAS
-
ISP
34h 40m
2 stops
$297Frontier
Sun, Mar 8 - Wed, Mar 11
Frontier Logo
5:08 pm - 11:30 am
ISP
-
LAS
21h 22m
1 stop
Frontier Logo
12:40 pm - 4:13 pm
LAS
-
ISP
24h 33m
1 stop
$304Frontier
Thu, Apr 16 - Sun, Apr 19
Frontier Logo
4:07 pm - 10:36 pm
ISP
-
LAS
9h 29m
1 stop
Frontier Logo
11:34 pm - 2:55 pm
LAS
-
ISP
12h 21m
1 stop
$311Frontier
Thu, Feb 19 - Wed, Feb 25
Multiple Airlines Logo
3:34 pm - 11:04 pm
ISP
-
LAS
34h 30m
2 stops
Multiple Airlines Logo
11:03 pm - 7:38 am
LAS
-
ISP
29h 35m
1 stop
$318Multiple Airlines
Fri, Feb 27 - Sat, Mar 7
Frontier Logo
3:34 pm - 10:31 am
ISP
-
LAS
21h 57m
1 stop
Frontier Logo
2:17 pm - 11:33 am
LAS
-
ISP
42h 16m
2 stops
$319Frontier
Sun, Apr 26 - Thu, Apr 30
Frontier Logo
4:07 pm - 10:36 pm
ISP
-
LAS
9h 29m
1 stop
Frontier Logo
11:34 pm - 2:55 pm
LAS
-
ISP
12h 21m
1 stop
$321Frontier
Booking Insights

KAYAK's insights & trends for Islip to Las Vegas flights

Get data-powered insights and trends into flights from Islip to Las Vegas to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from Islip to Las Vegas?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Islip to Las Vegas, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Islip to Las Vegas is January, where tickets cost $366 (return) on average. On the other hand, the most expensive months are November and June, where the average cost of round-trip tickets is $864 and $678 respectively.

Good to know

Low seasonJune
Cheapest flight$90
Best time to beat the crowds but there is an average 33% increase in price.
Most popular time to fly and prices are also 10% lower on average.
Flight from Islip to Las Vegas

When to book flights from Islip to Las Vegas

Are your dates flexible? Find out the best times to travel from Islip to Las Vegas based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Islip to Las Vegas

  • What is the cheapest flight from Islip to Las Vegas?

    In the last 3 days, the lowest price for a flight from Islip to Las Vegas was $90 for a one-way ticket and $229 for a round-trip.

  • Do I need a passport to fly between Islip and Las Vegas?

    No

  • Which airports will I be using when flying from Islip to Las Vegas?

    When flying out of Islip you will be using Islip Long Island. You will be landing at Las Vegas, also known as Las Vegas Harry Reid Intl.

  • Which aircraft models fly most regularly from Islip to Las Vegas?

    We unfortunately don’t have that data for this specific route.

  • Which is the best airline for flights from Islip to Las Vegas, Southwest or JetBlue?

    The two airlines most popular with KAYAK users for flights from Islip to Las Vegas are Southwest and JetBlue. With an average price for the route of $526 and an overall rating of 8.0, Southwest is the most popular choice. JetBlue is also a great choice for the route, with an average price of $370 and an overall rating of 7.2.

  • How does KAYAK find such low prices on flights from Islip to Las Vegas?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Islip to Las Vegas.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Islip to Las Vegas?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Las Vegas from Islip is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Islip to Las Vegas?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Las Vegas with an airline and back to Islip with another airline. Booking your flights between Islip and LAS can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Islip to Las Vegas?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Las Vegas from Islip up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airlines flying from Islip to Las Vegas

 
See real verified KAYAK customer reviews for airlines flying from Islip to Las Vegas. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Islip to Las Vegas? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
SouthwestOverall score based on 4267 reviews
8.0Comfort
8.6Crew
8.1Boarding
7.0Food
7.5Entertainment
Airline reviews

WIFI was great. My selection for seating is an aisle, but during my trip, I never had an aisle seat. If we can get that corrected, I will be thrilled. No snack or drink on this flight.

10.0 ExcellentJoseph, Jan 2026
BWI - RIC
Read more Southwest reviews

WIFI was great. My selection for seating is an aisle, but during my trip, I never had an aisle seat. If we can get that corrected, I will be thrilled. No snack or drink on this flight.

WIFI was great. My selection for seating is an aisle, but during my trip, I never had an aisle seat. If we can get that corrected, I will be thrilled.

The wifi on the plane is great. The only issue that I have is that I prefer an aisle seat and on my trips this week, I was either in the middle or window. If we can work to secure aisle seating, I will be thrilled. Nice trip.

All good except once again bags took an hour at Midway Airport Happens all the time. Ridiculous

Everything went smoothly and we even arrived a little bit early.

Great vacation. Can't wait till next year for another one.

Great flight but super high price. Glad it was a business trip and not personal

On time. Friendly staff. Took to long to pre bord all the specialty groups. Cramped small plane

The seats were comfortable, and the boarding process was pretty smooth.

We got exit row seats both flights. Everything was running on time

Terrible. They canceled our early morning flight after midnight on the day of and had no available flights to rebook my family on for the next 72 hours. Yet they still had other flights that were not cancelled from JFK so it couldn’t be based on the weather. It felt like they canceled the flight based on it not being profitable enough for them. I am not interested in traveling with the again. The absolute worse customer service and lack of accountability.

First time flying with JetBlue and never again. I went to the counter to request meet and assist because I'm 74 and my wife is 79. I walk with a cane and my wife is handicapped and has her own wheel chair. I told the agent that my wife and luggage was at the entrance door. The ticketing agent said to me that they don't offer meet and assist. I need to bring them our luggage and then go back and get my wife in order to get my boarding pass. As I went back to get my luggage a Southwest agent along with a TSA agent recognized the situation and came over and took my wife and luggage to the JetBlue ticketing counter alongside the line and told the JetBlue agent to issue to take our luggage as soon as they could.

Flight was fine, price was good but food onboard was abysmal. I was on there for breakfast and lunch and dinner 845am EST to 845pm GMT and all I got was a yoghurt parfait, fruit and a piece of cake. Later snacks included an ice-cream brownie and a pizza twist. I was hungry by the time I landed and the airport amenities were closed. Not happy.

Not a pleasant experience, service was poor. Didn't like it

Plane was in bad shape. TV’s and WiFi didn’t work. Plane need a refresh. Not enough room for bags.

Everything was great. I liked the text updates so that I never miss a gate change & I have all the latest info.

No internet on a flight over three hours in this age is criminal. Staff inattentive and dismissive

Worst flight experience ever flights canceled. JetBlue told us just did not even bother standing in line to come back in one and a half hours then without any information we had to go pick up all of our luggage and spend over $2000 in accommodation just to get home. JetBlue said that the next flight available for us to get home would be three days later. Absolutely absurd hasn’t offered to give us any compensation do not fly JetBlue horrible company. They said it was based on the weather and the weather is great in all locations that we would’ve been flying to total hoax. I think it’s a conspiracy theory.

flight was delayed for hours with no explanation. The plane was a very old aircraft.

You get what you pay for with JetBlue. Every little thing costs more, you are nickel and dimed until the end. Entertainment doesn’t function. Flight attendants do the bare minimum.

Everything you need to know for your flight from Islip to Las Vegas

Information on your arrival and departure airports