$150 Find Cheap Flights from Islip to California

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 California departing on 8/19. 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 California

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Islip to California, 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 California, as well as popular online travel agencies
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Flight Deals

Cheap Flights from Islip to California

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Los Angeles
Los Angeles1 stop$390
San Francisco
San Francisco2 stops$436
San Diego
San Diego2 stops$356
San Jose
San Jose1 stop$527
Fresno
Fresno2 stops$477
Los Angeles
Los Angeles1 stop$390
San Francisco
San Francisco2 stops$436
San Diego
San Diego2 stops$356
San Jose
San Jose1 stop$527
Fresno
Fresno2 stops$477

Book Cheap Islip to California Plane Tickets

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

Tue, Jul 28 - Tue, Aug 4
Southwest Logo
6:00 am - 12:35 pm
ISP
-
LAS
9h 35m
1 stop
Southwest Logo
11:00 pm - 10:15 am
LAS
-
ISP
8h 15m
1 stop
$347Southwest
Tue, Sep 8 - Wed, Sep 16
Frontier Logo
4:41 pm - 9:26 am
ISP
-
LAS
19h 45m
1 stop
Frontier Logo
10:12 pm - 9:33 am
LAS
-
ISP
8h 21m
1 stop
$350Frontier
Tue, Jul 28 - Tue, Aug 4
Southwest Logo
6:00 am - 12:35 pm
ISP
-
LAS
9h 35m
1 stop
Southwest Logo
8:00 am - 9:05 pm
LAS
-
ISP
10h 05m
2 stops
$352Southwest
Wed, Aug 5 - Thu, Aug 13
Southwest Logo
3:20 pm - 10:35 pm
ISP
-
SAN
10h 15m
2 stops
Southwest Logo
10:40 pm - 9:40 am
SAN
-
ISP
8h 00m
1 stop
$356Southwest
Wed, Aug 5 - Thu, Aug 13
Southwest Logo
3:20 pm - 10:35 pm
ISP
-
SAN
10h 15m
2 stops
Southwest Logo
9:00 pm - 9:40 am
SAN
-
ISP
9h 40m
2 stops
$361Southwest
Wed, Aug 5 - Thu, Aug 13
Southwest Logo
10:55 am - 4:15 pm
ISP
-
SAN
8h 20m
1 stop
Southwest Logo
10:40 pm - 9:40 am
SAN
-
ISP
8h 00m
1 stop
$366Southwest
Thu, Aug 27 - Tue, Sep 1
Frontier Logo
10:48 am - 8:45 pm
ISP
-
LAS
12h 57m
1 stop
Frontier Logo
8:17 pm - 10:03 am
LAS
-
ISP
10h 46m
1 stop
$370Frontier
Mon, Aug 24 - Wed, Aug 26
Frontier Logo
10:48 am - 8:45 pm
ISP
-
LAS
12h 57m
1 stop
Frontier Logo
8:17 pm - 10:03 am
LAS
-
ISP
10h 46m
1 stop
$390Frontier
Tue, Jul 7 - Tue, Aug 4
JetBlue Logo
4:58 pm - 10:46 pm
ISP
-
LAS
8h 48m
1 stop
JetBlue Logo
7:00 am - 9:44 pm
LAS
-
ISP
11h 44m
1 stop
$404JetBlue
Thu, Jul 9 - Tue, Jul 21
JetBlue Logo
4:58 pm - 11:58 pm
ISP
-
LAX
10h 00m
1 stop
JetBlue Logo
8:45 am - 9:44 pm
LAX
-
ISP
9h 59m
1 stop
$457JetBlue
Booking Insights

KAYAK's insights & trends for Islip to California flights

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

How much is a round-trip flight from Islip, New York to California?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Islip, New York to California departing in July.

What is the cheapest month to fly from Islip to California?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Islip to California, 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 California is November, when tickets cost $0 (return) on average. On the other hand, the most expensive months are June and March, when the average cost of round-trip tickets is $771 and $588 respectively.

Find deals

Good to know

Low seasonSeptember
Cheapest flight$150
Best time to beat the crowds with an average 9% drop in price.
Most popular time to fly with an average 15% increase in price.
Flight from Islip to Las Vegas

FAQs - booking California flights

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

    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 California.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Islip to California 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 California?

    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 from Islip to California with an airline and back with another airline.

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

    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 from Islip to California 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 California

 
See real verified KAYAK customer reviews for airlines flying from Islip to California. 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 California? 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 4235 reviews
8.1Boarding
8.6Crew
7.5Entertainment
8.0Comfort
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 gluten free snacks. Seats felt worn or bare bones even though it was a new 737 MAX 8.

Plane was clean and comfortable. Flight attendants and gate staff were professional, friendly and efficient. Boarding and deplaning were orderly and efficient. All in all, the typical excellent Southwest experience.

Not having a five hour delay with little notice! The crew was very kind, though, and just as tired as we passengers were. The flight didn't depart until nearly 1 am...and no reason was ever given.

This leg was much better, but we did have to have a 3 hour lay o er after coming from a very exhausting hiccup with our flight from BNA to Den

The Air hostess were very rude on my flight from Houston to Austin . Their regular communication itself felt a they are shouting at people.

Boarding was easy. The seats are small and fairly uncomfortable

The problem with the seat assignments is that there were a lot of rows in the front that were empty but my row at the back was full. Just not so pleasant.

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!

Good but I prefer choose your own seat. With the new assigned seats they should board from the back I see no advantage to this new boarding. Just like every other airline

Everything you need to know for your flight from Islip to California

Information on your arrival and departure airports

Islip (ISP)