ISP - LAS

$92 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 3/9. 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
$166
Overall average: $477
Frontier
Wed 3/4Thu 3/5
ISP - LAS • 1 stop
Cheapest one-way
$92
Frontier
Mon 3/9
ISP - LAS • 1 stop
When to travel
January
Cheapest • 29% 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

Wed, Mar 4 - Thu, Mar 5
Frontier Logo
2:03 pm - 10:15 am
ISP
-
LAS
23h 12m1 stop
Frontier Logo
11:03 pm - 12:47 pm
LAS
-
ISP
10h 44m1 stop
$166Frontier
Sat, Jan 10 - Tue, Jan 13
Frontier Logo
7:56 pm - 10:25 am
ISP
-
LAS
17h 29m1 stop
Frontier Logo
10:33 pm - 10:46 pm
LAS
-
ISP
21h 13m1 stop
$182Frontier
Mon, Mar 9 - Thu, Mar 12
Frontier Logo
1:42 pm - 10:49 pm
ISP
-
LAS
12h 07m1 stop
Frontier Logo
12:40 pm - 12:47 pm
LAS
-
ISP
21h 07m1 stop
$183Frontier
Tue, Jan 13 - Thu, Jan 15
Frontier Logo
8:00 am - 11:42 am
ISP
-
LAS
30h 42m1 stop
Frontier Logo
11:03 pm - 8:09 pm
LAS
-
ISP
18h 06m1 stop
$203Frontier
Mon, Jan 5 - Fri, Jan 9
Frontier Logo
2:04 pm - 9:43 am
ISP
-
LAS
22h 39m1 stop
Frontier Logo
10:45 pm - 7:08 pm
LAS
-
ISP
17h 23m1 stop
$218Frontier
Thu, Jan 8 - Sat, Jan 10
Frontier Logo
8:40 pm - 9:43 am
ISP
-
LAS
16h 03m1 stop
Frontier Logo
9:32 pm - 7:45 pm
LAS
-
ISP
19h 13m1 stop
$234Frontier
Thu, Feb 26 - Sun, Mar 1
Frontier Logo
3:34 pm - 10:15 am
ISP
-
LAS
21h 41m1 stop
Frontier Logo
11:03 pm - 2:39 pm
LAS
-
ISP
12h 36m1 stop
$238Frontier
Sun, Jan 11 - Wed, Jan 14
Frontier Logo
8:40 pm - 10:08 am
ISP
-
LAS
16h 28m1 stop
Frontier Logo
10:33 pm - 7:03 pm
LAS
-
ISP
17h 30m1 stop
$239Frontier
Sat, Jan 10 - Tue, Jan 13
Frontier Logo
7:56 pm - 10:25 am
ISP
-
LAS
17h 29m1 stop
Frontier Logo
10:58 pm - 10:46 pm
LAS
-
ISP
20h 48m2 stops
$252Frontier
Tue, Jan 13 - Thu, Jan 15
Frontier Logo
8:00 am - 11:44 pm
ISP
-
LAS
18h 44m2 stops
Frontier Logo
11:03 pm - 8:09 pm
LAS
-
ISP
18h 06m1 stop
$254Frontier
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 $362 (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$92
Best time to beat the crowds but there is an average 33% increase in price.
Most popular time to fly and prices are also 13% 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 $92 for a one-way ticket and $166 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 $519 and an overall rating of 7.9, 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 3 airlines serving 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.
7.9
SouthwestOverall score based on 4250 reviews
8.1Boarding
7.0Food
8.0Comfort
8.6Crew
7.5Entertainment
Airline reviews

They sent a notice that they were boarding an hour early. We had to leave the club and run to the gate. They said sorry, that came from corporate and was a mistake. They did not have enough seating because the flight before it had not taken off on time. They moved our gate and delayed it for an hour.

2.0 MediocreRobert, Dec 2025
LAS - TPA
Read more Southwest reviews

They sent a notice that they were boarding an hour early. We had to leave the club and run to the gate. They said sorry, that came from corporate and was a mistake. They did not have enough seating because the flight before it had not taken off on time. They moved our gate and delayed it for an hour.

The boarding and seat assignment system no longer works for me, but I know it is being replaced. Otherwise, I am good with the overall experience.

The lead steward kept singing about "San Francisco" and hotel California---more annoying than humorous....needs work. Flight was smooth and on time.

Still a fan of open seating. Flight was on schedule and arrived on time. The 737 MAX is very comfortable.

Airline travel is always too cramped to really be pleasant, but the cabin crew on this flight did a pretty good job of making up for it by putting on some music during boarding and sprinkling a few funny remarks into the safety briefing and announcements, and just generally being friendly and helpful. It definitely reminded me of why I prefer the in-flight experience on Southwest!

No delays and arrived to destination 30 min early. Staff was super friendly.

San Diego airport is brand new, spacious, airy and very smooth checkin at SW baggage drop.

It was rough. The staff was unprofessional, the choice of on board drinks terrible, it was cramped in space at every airport, they always ran out of overhead bin space so they pressured people to check bags for free or we couldn’t leave on the plane— so I did check my bag to help, and they nearly lost my bag. My bag did not arrive on the luggage belt, another man on my flight and I had to waste our time going to the baggage office to search for our bags. I would only fly southwest again if it was my last choice. Also, my flights were consistently delayed over and over again— at one point they straight up told us we were waiting for the pilot to arrive.

Crew could have been friendlier, maybe I'm spoiled by SW crews. In flight wifi was good. Would be nice to have more food offerings on a 4 plus hour flight

Plane crashed into a bus or some other vehicle on the ground while pulling out of the gate. No injuries, but wing tip was damaged and returned to gate for “maintenance issues” and we departed 5 hours later because the plane went out of service and new plane was flown in from a nearby airport, Midway.

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.

Communication since no reason or explanation was given for 3 hrs delay

The flight departed more than 1 hour late. Leg room is bigger than most airlines

Excellent. Although they used to greet me as a mosaic member and provide a free drink, early boarding helps me to keep coming back to JetBlue.

No music app working: no economy meal on five hour flight; hour on tarmac at the end waiting for a gate. Flight itself was smooth and easy.

Not clean and was told I would get a great seat and it was not great at all

Flight got delayed for 5 hours no good explanation was offered ;(

Horrible. I would never fly Frontier again. The booking process is tricky at best, but fraudulent in my opinion. Frontier customer service did nothing to rectify my purchase -- I ended up paying more than double what I could have gotten from other airlines and nearly triple what I thought I was buying from Frontier. Their booking practices are unfair to the consumer.

Delayed. Text notifications were slow. Not much information o what was happening. Boarding was slow and confusing. Wasn’t even offered water other flight. Had to ask. No entertainment at all. Felt like.a Greyhound bus.

When I wanted to check in 3 hours prior to boarding time, the employees mentioned “a little over an hour delay” so I waited for an hour then I went to go look for food in the terminal and most people from that flight were in the same area looking for food. Finally I decided after food to check to see if it’s anytime closer and now it’s 2 mins until boarding closes?! What are you kidding me? I didn’t receive anything via sms about boarding now nor via email or on the intercom. I luckily made it through, barely, and then there’s no room for my carry on mind you I’m in the very first row so I had to place my purse in one further row back and my carry on sections down. Not sure who pays for better seats to get your stuff placed all over the plane but that was the worst experience I’ve ever had flying with anyone.

Better than expected. Staff were friendly and nice on both flights.

There was no one at the counter to assist with our check in. The app didn’t work, so I arrived at the airport with time to check in and I couldn’t because no employees were there. When I finally got someone on the phone, it was inside the 60min rule and they said I could no longer check in and they could sell me another ticket. We had to scramble and pay an additional $800 for tickets and THEN AFTER (about 60 min from my original convo with customer service and 10min after original departure time) I had boarded my new flight, there was email saying my original flight from Frontier was delayed and leaving 2hr 50min later, but I STILL wouldn’t have been able to check in. Which means customer service should have been able to see it and let me check in because I was well within my check in time. When I call Frontier, they hang up on me. So their app didn’t work and they employees left and they take zero responsibility or assistance with their “customer service”

Terrible. Flight cancelled with no reasoning and no flights to rebook. Employees were useless and did nothing to help. Did not even know where to retrieve luggage from the cancelled flight. Flyers beware.

No fault of Frontier staff: plane was very late, reached Orlando at 1 am, took a while to get luggage. Weather, gov financial shutdown impact on TSA, air controllers seemed to have multiple flights backed up. Frontier staff seemed to cope as gracefully as possible. It did reassure me that I and my new hip could adapt to travel challenges. Food/entertainment were irrelevant to my trip.

Terrible. The canceled my entire flight when I requested a refund for a trip frontier canceled trip one way.

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

Information on your arrival and departure airports