ISP - LAX

$139 Find Cheap Flights from Islip to Los Angeles - Compare and Save

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 Los Angeles departing on 9/2. 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

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Everything you should know

Cheapest round-trip
$278
Typical prices: $329-$544
Frontier
Wed 8/26Wed 9/2
ISP - LAX • 1 stop
Cheapest one-way
$139
Frontier
Wed 9/2
ISP - LAX • 1 stop
Top airlines
Cheapest • from $278 (round-trip)
Best reviews • 8.0 score
Airline reviews
Airline reviews
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Airline reviews
Airline reviews
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Nonstop flights
Not available
There are currently no direct flights between Islip and Los Angeles. You'll need at least 1 connection.
Insights
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Insights
Top layover airports
Cheapest • Avg $532 (round-trip)
Shortest trip • 8h 26m (one-way)
Insights
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Insights
When to travel
Cheapest • 100% price drop
Most popular
Good to know
Good to know
+1
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Good to know
Good to know
+1
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We hope you love your trip to Los Angeles!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Islip to Los Angeles (ISP-LAX)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Islip to Los Angeles 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 Los Angeles

Wed, Aug 26 - Wed, Sep 2
Frontier Logo
10:57 am - 6:12 pm
ISP
-
LAX
10h 15m
1 stop
Frontier Logo
11:20 pm - 6:14 pm
LAX
-
ISP
15h 54m
1 stop
$278Frontier
Sat, Sep 5 - Tue, Sep 8
Frontier Logo
10:57 am - 6:18 pm
ISP
-
LAX
10h 21m
1 stop
Frontier Logo
11:34 pm - 4:58 pm
LAX
-
ISP
14h 24m
1 stop
$280Frontier
Sat, Sep 5 - Wed, Sep 9
Frontier Logo
10:57 am - 6:12 pm
ISP
-
LAX
10h 15m
1 stop
Frontier Logo
9:56 pm - 9:33 am
LAX
-
ISP
8h 37m
1 stop
$280Frontier
Tue, Aug 25 - Tue, Sep 1
Southwest Logo
10:55 am - 6:05 pm
ISP
-
LAX
10h 10m
1 stop
Southwest Logo
10:35 pm - 10:15 am
LAX
-
ISP
8h 40m
1 stop
$311Southwest
Thu, Aug 20 - Thu, Aug 27
Southwest Logo
4:05 pm - 10:40 pm
ISP
-
LAX
9h 35m
1 stop
Southwest Logo
10:15 pm - 11:55 am
LAX
-
ISP
10h 40m
1 stop
$311Southwest
Wed, Sep 9 - Sat, Sep 12
Southwest Logo
3:20 pm - 10:40 pm
ISP
-
LAX
10h 20m
1 stop
Southwest Logo
10:40 am - 8:50 pm
LAX
-
ISP
7h 10m
1 stop
$311Southwest
Tue, Sep 22 - Mon, Sep 28
Southwest Logo
3:20 pm - 10:40 pm
ISP
-
LAX
10h 20m
1 stop
Southwest Logo
10:35 pm - 10:15 am
LAX
-
ISP
8h 40m
1 stop
$311Southwest
Fri, Oct 30 - Tue, Nov 3
Southwest Logo
11:00 am - 5:15 pm
ISP
-
LAX
9h 15m
1 stop
Southwest Logo
6:15 am - 4:20 pm
LAX
-
ISP
7h 05m
1 stop
$316Southwest
Fri, Sep 11 - Mon, Sep 14
Southwest Logo
10:20 am - 5:00 pm
ISP
-
LAX
9h 40m
1 stop
Southwest Logo
10:35 pm - 10:15 am
LAX
-
ISP
8h 40m
1 stop
$316Southwest
Wed, Aug 26 - Wed, Sep 2
Southwest Logo
6:05 am - 11:25 am
ISP
-
LAX
8h 20m
1 stop
Southwest Logo
9:45 am - 9:05 pm
LAX
-
ISP
8h 20m
2 stops
$316Southwest
Booking Insights

KAYAK's insights & trends for Islip to Los Angeles flights

Get data-powered insights and trends into flights from Islip to Los Angeles 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 Los Angeles?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Islip to Los Angeles, 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 Los Angeles is November, where tickets cost $0 (return) on average. On the other hand, the most expensive months are June and March, where the average cost of round-trip tickets is $936 and $588 respectively.

Good to know

Cheapest flight

$139
Most popular time to fly with an average 5% increase in price.
Flight from Islip to Los Angeles

When to book flights from Islip to Los Angeles

Are your dates flexible? Find out the best times to travel from Islip to Los Angeles 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 Los Angeles

  • What is the cheapest flight from Islip to Los Angeles?

    In the last 5 days, the lowest price for a flight from Islip to Los Angeles was $139 for a one-way ticket and $278 for a round-trip.

  • Do I need a passport to fly between Islip and Los Angeles?

    No

  • Which airports will I be using when flying from Islip to Los Angeles?

    When flying out of Islip you will be using Islip Long Island. You will be landing at Los Angeles, also known as Los Angeles.

  • Which aircraft models fly most regularly from Islip to Los Angeles?

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

  • How does KAYAK find such low prices on flights from Islip to Los Angeles?

    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 Los Angeles.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Los Angeles 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 Los Angeles?

    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 Los Angeles with an airline and back to Islip with another airline. Booking your flights between Islip and LAX 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 Los Angeles?

    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 Los Angeles 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 airline flying from Islip to Los Angeles

 
See real verified KAYAK customer reviews for airlines flying from Islip to Los Angeles. 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 Los Angeles? 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 4228 reviews
8.0Comfort
7.5Entertainment
8.1Boarding
8.6Crew
7.0Food
Airline reviews

The first time I flew in the extra legroom section. It was difficult to notice a difference. I had bad luck with my neighbors. The crew was okay. Southwest has reduced the live TV options.

4.0 OkayAnonymous, May 2026
MDW - LAX
Read more Southwest reviews

The first time I flew in the extra legroom section. It was difficult to notice a difference. I had bad luck with my neighbors. The crew was okay. Southwest has reduced the live TV options.

No food or entertainment, just a quick 40 minute flight. A little bumpy due to Santa Ana winds but pilot has no control over that. Good flight and landing!

Mediocre. Boarding is now unpleasant. The employees, once friendly and nice, are now regularly speaking sternly to passengers, badgering them to do things right so they can take off on time and gate check bags because they don't have enough overhead bin space. The pretzel snack was crushed flat and broken into even smaller pieces, which happens frequently lately. Drink service was suspended before they reached my row.

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

I will be flying again Southwest Airlines. Friendly crew, comfortable and affordable.

The flight was delayed for almost an hour. We sat on the tarmac. There was no announcement. Not by the pilot or the crew. And for some reason, there was no beverage service, so even though it was a short flight, we had sat on the tarmac and the extra hour delay made me understandably thirsty. Water would’ve been nice if they had offered it. And for the first time, I forgot to bring my own water bottle. Reminder to bring your own water bottle because you never know if you’re going to get a beverage.

It was a new plane with larger overhead bins & charging ports at the seats.

Southwest has a serious issue with keeping their passengers in the dark about delays. They also appear to lack the necessary crews to deal with any sort of hiccup in their operations. The way they run their day-to-day operations is a joke. You are telling me that a hail storm in Denver, where hail storms are incredibly common, results in hours of delays due to every plane needing to be inspected for hail damage? Understandable, but there seems to be a skeleton crew of maintenance workers undergoing this daunting task. There was no particular order of inspecting planes, leading to some planes only having an hour delay or less in others having four or more just because of the luck of the draw of what plane got inspected with no consideration to how long the respective delay was. The entire time the passengers were told nothing except the fact that there was lightning in the area and the ground crews could not load the bags. This always happens that Southwest will incrementally delay a flight with no information given, leaving many frustrated passengers fuming once they find out that their flight is canceled. Don't make people wait around for hours at the airport giving them no information, just to keep them on the hook and prevent any action from being taken by the passengers in terms of finding alternate routes of transportation or accommodations for the night. How many hours of people's times do you think you waste by operating like this? How about having a fully staffed crew in one of your busiest hubs that is famous for severe weather that can effectively deal with a situation like this, or how about having planes on standby to quickly replace in case something like this happens, like all the other major airlines do. This is just like the Christmas fiasco but on a Denver scale, but again this is literally just from a single thunderstorm going over Denver in the spring. I'm glad I've stopped using Southwest as my primary airline and have switched to United. Every single time I fly Southwest, something has to come up. It's ridiculous and I seriously can't wait to finish using my miles so I don't have to deal with your garbage anymore. You used to be so good and I don't know why you thought you could just scrap your quality and expect people to deal with it. Oh, and I walked by someone getting CPR for over 5 minutes in the concourse. I hope he was ok. Southwest needs something similar.

Everything was very good. I will fly Southwest again soon!

Luggage was intact and arrived at the destination. What more could you ask for.. haha. The delay in arrival wasn’t SW fault.. just selfish passengers not wanting to check their luggage knowing they were in the last boarding groups

Everything you need to know for your flight from Islip to Los Angeles

Information on your arrival and departure airports