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$100+ Cheap flights from Islip (ISP) to California

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/12. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — LAX
oct. 11 — oct. 181
sáb. 10/11
sáb. 10/18
1 adult, Economy
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Cheap flight deals from Islip to California

Keep the following information in mind while searching for Islip to California flight deals. Data was last updated septiembre 11, 2025.

Round-trip from

$181
(CheapOair)

One-way from

$100
(Kiwi.com)

Popular in

December

Cheapest in

September

Average price

$309
From Islip Long Island to California
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One-way flight from Islip Long Island to California
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Highest demand for flights based on searches. 8% potential increase in price ($32 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($12 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Islip to California

Cheapest flights from Islip to California
Explore the most affordable flight options available from Islip to California. Find the lowest fares from popular airlines and budget airlines, with prices last updated on septiembre 11, 2025.

This CheapOair deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 10/45:05 pmISP - LAS
1 stop19h 05mFrontier
mar. 10/710:16 pmLAS - ISP
1 stop9h 41mFrontier
Deal found 9/10$181
This CheapOair deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/169:37 pmISP - LAX
1 stop13h 51mFrontier
vie. 10/242:27 pmLAX - ISP
1 stop17h 10mFrontier
Deal found 9/10$187
This Cheapflightsfares deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 10/254:58 pmISP - LAS
1 stop9h 54mFrontier
jue. 10/3011:02 pmLAS - ISP
1 stop8h 35mFrontier
Deal found 9/9$188
This CheapOair deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/111:35 amISP - LAX
1 stop23h 37mFrontier
dom. 10/52:21 pmLAX - ISP
1 stop17h 19mFrontier
Deal found 9/11$211
This CheapOair deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/2511:40 amISP - LAX
1 stop23h 32mFrontier
dom. 9/282:21 pmLAX - ISP
1 stop17h 19mFrontier
Deal found 9/10$216
This CheapOair deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 10/149:37 pmISP - LAX
1 stop13h 51mFrontier
mar. 10/212:27 pmLAX - ISP
1 stop17h 30mFrontier
Deal found 9/11$218
This CheapOair deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 10/65:05 pmISP - LAS
1 stop19h 22mFrontier
jue. 10/910:16 pmLAS - ISP
1 stop9h 21mFrontier
Deal found 9/10$219
This CheapOair deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/211:40 amISP - LAX
1 stop23h 32mFrontier
vie. 10/102:27 pmLAX - ISP
1 stop17h 10mFrontier
Deal found 9/10$221
This Frontier deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 10/149:37 pmISP - LAX
1 stop13h 51mFrontier
jue. 10/232:15 pmLAX - ISP
2 stops17h 22mFrontier
Deal found 9/11$222
This Frontier deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 10/129:47 pmISP - LAX
1 stop13h 41mFrontier
lun. 10/209:31 pmLAX - ISP
2 stops20h 11mFrontier
Deal found 9/9$225
This CheapOair deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 9/3011:25 amISP - LAS
1 stop31h 14mFrontier
lun. 10/2010:16 pmLAS - ISP
1 stop19h 26mFrontier
Deal found 9/10$227
This CheapOair deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/1811:40 amISP - LAX
1 stop23h 32mFrontier
lun. 9/222:21 pmLAX - ISP
1 stop17h 19mFrontier
Deal found 9/9$229

Cheapflights Fare Finder

 
Customize your flight search to find flights from Islip to California that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated septiembre 11, 2025.
Use the filters below to find and compare flights from Islip to California that are best for you.

Fly from

Islip

Fly to

California

Route

Depart

Return

Price

IslipLos Angeles

ISP - LAX

ISPLAX

Islip Long Island

sáb. 10/4

5:05 pm-8:12 am

1 stop18h 07m

Los Angeles

mié. 10/8

2:27 pm-8:42 pm

1 stop27h 15m

$187

IslipLos Angeles

ISP - LAX

ISPLAX

Islip Long Island

sáb. 9/27

5:05 pm-8:12 am

1 stop18h 07m

Los Angeles

vie. 10/3

2:21 pm-10:55 am

1 stop17h 34m

$187

IslipLos Angeles

ISP - LAX

ISPLAX

Islip Long Island

jue. 9/25

11:40 am-8:12 am

1 stop23h 32m

Los Angeles

dom. 9/28

2:21 pm-10:40 am

1 stop17h 19m

$216

IslipLos Angeles

ISP - LAX

ISPLAX

Islip Long Island

mar. 10/14

9:37 pm-8:28 am

1 stop13h 51m

Los Angeles

mar. 10/21

2:27 pm-10:57 am

1 stop17h 30m

$218

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

mar. 9/30

11:25 am-3:39 pm

1 stop31h 14m

Las Vegas Harry Reid Intl

lun. 10/20

10:16 pm-8:42 pm

1 stop19h 26m

$227

IslipLos Angeles

ISP - LAX

ISPLAX

Islip Long Island

sáb. 9/20

5:05 pm-8:12 am

1 stop18h 07m

Los Angeles

dom. 9/28

2:21 pm-10:40 am

1 stop17h 19m

$229

IslipLos Angeles

ISP - LAX

ISPLAX

Islip Long Island

vie. 10/17

4:58 pm-8:28 am

1 stop18h 30m

Los Angeles

mié. 10/22

2:27 pm-8:42 pm

1 stop27h 15m

$231

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

mar. 10/7

9:37 pm-9:27 am

1 stop14h 50m

Las Vegas Harry Reid Intl

mar. 10/14

10:16 pm-10:57 am

1 stop9h 41m

$232

IslipLos Angeles

ISP - LAX

ISPLAX

Islip Long Island

sáb. 10/11

4:58 pm-8:28 am

1 stop18h 30m

Los Angeles

jue. 10/16

2:27 pm-10:37 am

1 stop17h 10m

$233

IslipOntario

ISP - ONT

ISPONT

Islip Long Island

lun. 11/10

9:54 am-6:39 pm

2 stops11h 45m

Ontario

vie. 11/14

8:24 am-10:55 am

2 stops23h 31m

$241

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/9

Showing 1-10 of 60 results
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Best time to book a flight from Islip to California

Have a flexible travel schedule? Discover the best time to fly to California from Islip with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

What is the cheapest month to book a flight from Islip to California?

Currently, January is the cheapest month in which you can book a flight from Islip to California (average of $246). Flying from Islip to California in March is currently the most expensive (average of $325). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ISP to CA?

Find hourly flight availability from Islip to California. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated septiembre 11, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Islip to California as you normally would.

How much does it cost to fly round-trip from Islip to California?

Reviews of airlines servicing California

Get insights into the airlines that provide service to California. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to California. Reviews last updated septiembre 11, 2025.
Read through reviews of airlines operating flights from Islip to California, such as Southwest. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,248 reviews

Food

7.0

Boarding

8.1

Overall

8.0

Entertainment

7.5

Crew

8.6

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Southwest
8.0
Very good
4,248 reviews
Southwest
8.0
Very good
4,248 reviews

Food

7.0

Boarding

8.1

Overall

8.0

Entertainment

7.5

Crew

8.6

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.

Related info for your journey

Find useful and relevant information for your journey from Islip to California. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Islip to California?

    Most people fly from Islip Long Island (ISP) if they book a flight from Islip to California. Islip Long Island is conveniently located just 7.2 mi from Islip’s city center.

  • How long is the flight from Islip to California?

    Airlines like Frontier and Southwest fly from Islip to California in about 12h 55m. The time it takes to get you to your destination can typically vary by up to 5h 12m. Islip and California are separated by a distance of 2493 mi. This flight may include one or multiple stops.

  • What are the most popular routes from Islip to California?

    The most popular route from Islip to California is Islip Long Island - Las Vegas Harry Reid Intl. You may also consider Islip Long Island - Los Angeles or Islip Long Island - San Francisco.

  • Can I find deals for flights from Islip to California that include hotel bookings?

    Yes. In addition to deals on Islip to California flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Islip to California?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Islip to California.

  • Can I find deals for business class flights from Islip to California?

    Yes. Cheapflights offers flight deals from Islip to California by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Islip to California?

    Currently, January is the cheapest month in which you can book a flight from Islip to California (average of $246). Flying from Islip to California in March is currently the most expensive (average of $325). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for Islip to California

See prices for flight routes from nearby airports that may be better suited for you.
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Top airline flying from Islip to California

Discover the top airline that operate flights from Islip to California. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated septiembre 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$350Average$513FlexibilityNo cancel feeOn-time63%

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