ISP - LAS

$198 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 9/1. 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

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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Flights 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, Jul 11 - Sun, Jul 13
Frontier Logo
8:37 pm - 9:45 amISP-LAS
16h 08m1 stop
Frontier Logo
11:02 pm - 1:04 pmLAS-ISP
11h 02m1 stop
$315Frontier
Find Deal
Wed, Aug 20 - Mon, Aug 25
Southwest Logo
12:30 pm - 7:45 pmISP-LAS
10h 15m2 stops
Southwest Logo
10:20 am - 10:55 pmLAS-ISP
9h 35m1 stop
$342Southwest
Find Deal
Wed, Aug 20 - Mon, Aug 25
Southwest Logo
6:05 am - 12:45 pmISP-LAS
9h 40m2 stops
Southwest Logo
11:40 pm - 11:55 amLAS-ISP
9h 15m2 stops
$347Southwest
Find Deal
Wed, Aug 20 - Mon, Aug 25
Southwest Logo
6:05 am - 12:05 pmISP-LAS
9h 00m1 stop
Southwest Logo
10:20 am - 10:55 pmLAS-ISP
9h 35m1 stop
$365Southwest
Find Deal
Sat, Aug 2 - Thu, Aug 7
Frontier Logo
8:37 pm - 9:45 amISP-LAS
16h 08m1 stop
Frontier Logo
11:02 pm - 1:04 pmLAS-ISP
11h 02m1 stop
$370Frontier
Find Deal
Sat, Jul 26 - Sun, Jul 27
Frontier Logo
8:37 pm - 9:45 amISP-LAS
16h 08m1 stop
Frontier Logo
11:02 pm - 1:04 pmLAS-ISP
11h 02m1 stop
$375Frontier
Find Deal
Tue, Jul 1 - Tue, Jul 8
JetBlue Logo
2:39 pm - 10:49 pmISP-LAS
11h 10m1 stop
JetBlue Logo
11:58 pm - 11:41 amLAS-ISP
8h 43m1 stop
$580JetBlue
Find Deal
Mon, Jun 30 - Fri, Jul 4
Breeze Airways Logo
10:36 am - 11:19 amISP-LAS
27h 43m2 stops
Breeze Airways Logo
12:01 pm - 1:32 pmLAS-ISP
22h 31m2 stops
$666Breeze Airways
Find Deal
Sat, Aug 30 - Mon, Sep 1
Breeze Airways Logo
2:12 pm - 11:19 amISP-LAS
24h 07m2 stops
Breeze Airways Logo
12:01 pm - 1:15 pmLAS-ISP
22h 14m3 stops
$687Breeze Airways
Find Deal
Tue, Jul 1 - Sat, Jul 5
JetBlue Logo
2:39 pm - 10:49 pmISP-LAS
11h 10m1 stop
JetBlue Logo
11:59 pm - 11:41 amLAS-ISP
8h 42m1 stop
$753JetBlue
Find Deal
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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 October, where tickets cost $384 (return) on average. On the other hand, the most expensive months are December and November, where the average cost of round-trip tickets is $601 and $521 respectively.

Good to know

Low seasonJune
High seasonApril
Cheapest flight$198
Best time to beat the crowds but there is an average 1% increase in price.
Most popular time to fly and prices are also 3% 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 $198 for a one-way ticket and $315 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 Frontier?

    The two airlines most popular with KAYAK users for flights from Islip to Las Vegas are Southwest and Frontier. With an average price for the route of $497 and an overall rating of 8.0, Southwest is the most popular choice. Frontier is also a great choice for the route, with an average price of $268 and an overall rating of 5.9.

  • 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 4278 reviews
8.6Crew
7.6Entertainment
7.1Food
8.2Boarding
8.0Comfort
Airline reviews

Southwest is Southwest. No frills. If you're luck enough to get a happy crew (we did), then it makes for a nicer flight.

10.0 ExcellentMichael, Jun 2025SMF - SEA
Read more Southwest reviews

Southwest is Southwest. No frills. If you're luck enough to get a happy crew (we did), then it makes for a nicer flight.

Southwest is typically delayed, and it gets wearisome. It is no longer a discount airline and you get way less than you pay for when it comes to comfort and Ce.

We sat on the plane on the tarmac for 4 hours.

I'm not a fan of Southwest's model. I don't like the herding style of boarding.

Flight crew and cabin crew were great. I had to rearrange flights because my original flight was 3hrs delayed for weather, the rub is the flight I moved to boarded on time then we sat at the gate for 2 hours because scheduling stole our first officer for another flight, TWICE. Then our actual FO was an hour delayed. To make it worse my original flight went from a 3 hour delay to departing 15min EARLY. Just poor scheduling operations all around.

Bring back peanuts Take our drink orders when were all seated, especially after you switch to assigned seating.

Staff was far less than helpful at all times. Departure and arrival times mean nothing to Southwest. Extremely disappointed, will never fly with them again, and I’ll be sure to share my experience with all.

It is southwest seat was ok. Not the most comfortable seat

I’ve always loved Southwest. No issues at all. I was flying standby and the gate agent was extremely friendly and helpful. Boarding was smooth and I was able to get a window seat in the emergency exit row. Crew was fantastic! They were very professional and accommodating. We had to divert from our destination due to weather but the flight crew kept everyone at ease and informed us of all pertinent information. Excellent flight

The price of the tickets isn't matching the flight experience. No matter how long the flight is, you're only getting pretzels. The flight attendants looked unkept and over it.

They canceled flight. Hard to believe there was even a plane incoming for us to get on

The worst. We never made our connection and they did absolutely nothing to help us at the airport.

Our flight was cancelled. They could do nothing to help us get another flight that was timely. Because the first leg was cancelled we were unable to get to our connection. We had to book on an entirely different airline for today. So we spent more money, lost a day of vacation and will never fly Frontier again, so the 'we are sorry, here is $100 credit' is a joke since we won't be flying on Frontier.

No way to get boarding pass on my phone. In order to print the bag ticket a boarding pass is needed. Asked the agent to print me one, they said they typically do not due this as its so much work. I showed the email confirmation and I asked how i could do it my self the agent replied he did not know as there was no link. The flight was delayed due to an attendant forgetting to come to work. On the flight no drinks were offered only for purchase meals.

No way to get boarding pass on my phone. In order to print the bag ticket a boarding pass is needed. Asked the agent to print me one, they said they typically do not due this as its so much work. I showed the email confirmation and I asked how i could do it my self the agent replied he did not know as there was no link. On the flight no drinks were offered only for purchase meals.

Since you have to pay for overhead bags then they shouldn't be running out of space and asking individuals who paid to remove stuff from the overhead

Cancelled flight after I arrived at airport after 75 min drive and parking. Next flight was 4 days in the future. Had to scramble and buy a much more expensive flight on another carrier.

Book with frontier airlines with the mentality that they'll cancel your flight, kick you off and lose your luggage. Anything besides that is a win. Compare prices with other airlines (to include luggage) and if frontier is still worth it, book it but know all of their policies.

You get what you pay for nothing essentially but a hard uncomfortable seat that doesn’t recline and kids screaming all around you and chaotic boarding and limited check bag weight allowance when compared to other airlines

I never got to experience the flight because they delayed my first flight and I missed this one. Then Frontier didn't want to help me rebook a flight to get me to my final destination.

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

Information on your arrival and departure airports

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