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$141+ Cheap flights from Islip, NY (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 8/20. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — LAX
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$279
(JetBlue)

One-way from

$141
(JetBlue)

Popular in

December

Cheapest in

September

Average price

$383
From Islip Long Island to California
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One-way flight from Islip Long Island to California
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($27 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 June 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 June 12, 2025.

This JetBlue deal was found by Cheapflights users on 6/9. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1211:35 amISP - SFO
1 stop10h 45mJetBlue
Sun 9/2110:15 pmSFO - ISP
1 stop9h 35mJetBlue
Deal found 6/9$279
This Southwest deal was found by Cheapflights users on 6/12. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/113:55 pmISP - SAN
1 stop8h 40mSouthwest
Tue 11/1812:00 pmSAN - ISP
1 stop7h 05mSouthwest
Deal found 6/12$297
This JetBlue deal was found by Cheapflights users on 6/11. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2111:40 amISP - LAX
1 stop11h 39mJetBlue
Tue 8/2610:15 pmLAX - ISP
1 stop10h 26mJetBlue
Deal found 6/11$300
This Southwest deal was found by Cheapflights users on 6/10. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/56:30 pmISP - LAX
1 stop8h 20mSouthwest
Thu 10/165:05 amLAX - ISP
1 stop8h 45mSouthwest
Deal found 6/10$334
This FlightHub deal was found by Cheapflights users on 6/12. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/307:33 pmISP - LAS
1 stop17h 03mFrontier
Fri 9/510:22 pmLAS - ISP
1 stop9h 15mFrontier
Deal found 6/12$337
This Southwest deal was found by Cheapflights users on 6/10. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/125:40 amISP - SFO
1 stop10h 40mSouthwest
Fri 11/149:25 pmSFO - ISP
1 stop11h 25mSouthwest
Deal found 6/10$339
This Southwest deal was found by Cheapflights users on 6/11. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/174:00 pmISP - LAS
2 stops9h 45mSouthwest
Fri 9/1911:25 pmLAS - ISP
2 stops9h 35mSouthwest
Deal found 6/11$341
This FlightHub deal was found by Cheapflights users on 6/11. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/17:33 pmISP - LAX
1 stop20h 27mFrontier
Mon 9/82:20 pmLAX - ISP
1 stop17h 17mFrontier
Deal found 6/11$358
This Southwest deal was found by Cheapflights users on 6/12. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/256:00 amISP - ONT
1 stop8h 35mSouthwest
Mon 9/112:45 pmONT - ISP
1 stop7h 10mSouthwest
Deal found 6/12$371
This FlightHub deal was found by Cheapflights users on 6/11. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/248:21 pmISP - SFO
1 stop16h 58mFrontier
Fri 6/278:53 pmSFO - ISP
1 stop19h 43mFrontier
Deal found 6/11$430
This Trip.com deal was found by Cheapflights users on 6/10. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/18:21 pmISP - LAX
2 stops37h 38mMultiple Airlines
Mon 7/75:47 pmLAX - ISP
2 stops25h 11mMultiple Airlines
Deal found 6/10$445
This Frontier deal was found by Cheapflights users on 6/11. 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.
Wed 6/188:21 pmISP - SAN
2 stops22h 47mFrontier
Wed 6/256:51 pmSAN - ISP
2 stops15h 15mFrontier
Deal found 6/11$486

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 June 12, 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

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Fri 9/12

11:35 am-7:20 pm

1 stop10h 45m

San Francisco

Sun 9/21

10:15 pm-10:50 am

1 stop9h 35m

$279

IslipSan Diego

ISP - SAN

ISPSAN

Islip Long Island

Tue 11/11

3:55 pm-9:35 pm

1 stop8h 40m

San Diego

Tue 11/18

12:00 pm-10:05 pm

1 stop7h 05m

$297

IslipLos Angeles

ISP - LAX

ISPLAX

Islip Long Island

Thu 8/21

11:40 am-8:19 pm

1 stop11h 39m

Los Angeles

Tue 8/26

10:15 pm-11:41 am

1 stop10h 26m

$300

IslipLos Angeles

ISP - LAX

ISPLAX

Islip Long Island

Sun 10/5

6:30 pm-11:50 pm

1 stop8h 20m

Los Angeles

Thu 10/16

5:05 am-4:50 pm

1 stop8h 45m

$334

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Sat 8/30

7:33 pm-9:36 am

1 stop17h 03m

Las Vegas Harry Reid Intl

Fri 9/5

4:42 pm-10:37 am

1 stop14h 55m

$337

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Wed 11/12

5:40 am-1:20 pm

1 stop10h 40m

San Francisco

Fri 11/14

10:10 am-11:50 pm

2 stops10h 40m

$339

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Wed 9/17

4:00 pm-10:45 pm

2 stops9h 45m

Las Vegas Harry Reid Intl

Fri 9/19

11:25 pm-12:00 pm

2 stops9h 35m

$341

IslipLos Angeles

ISP - LAX

ISPLAX

Islip Long Island

Mon 9/1

7:33 pm-1:00 pm

1 stop20h 27m

Los Angeles

Mon 9/8

2:20 pm-10:37 am

1 stop17h 17m

$358

IslipOntario

ISP - ONT

ISPONT

Islip Long Island

Mon 8/25

6:00 am-11:35 am

1 stop8h 35m

Ontario

Mon 9/1

12:45 pm-10:55 pm

1 stop7h 10m

$371

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Tue 6/24

8:21 pm-10:19 am

1 stop16h 58m

San Francisco

Fri 6/27

8:53 pm-7:36 pm

1 stop19h 43m

$430

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

Showing 1-10 of 53 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, New York to California?

Currently, January is the cheapest month in which you can book a flight from Islip, New York to California (average of $246). Flying from Islip, New York to California in March is currently the most expensive (average of $327). 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 June 12, 2025.

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

Rainfall in California by month

Plan your trip to California by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in California ranges from 0.0 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. July is typically the driest time to visit California when rainfall is around 0.0 in.

Temperature in California by month

Plan your trip to California by taking into account the average temperature totals by month.

If weather is an important factor for your trip to California, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 57.2 F).

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 June 12, 2025.
See what other customers who have flown with Breeze Airways, Southwest and JetBlue from Islip to California have to say. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Breeze Airways
8.1
Very good
178 reviews

Overall

8.1

Entertainment

6.6

Comfort

8.2

Food

6.7

Boarding

8.3

Crew

8.8

Reviews

1 / 11
10.0
Excellent

Dena,Dec 2024

LAS - BDL

It was comfortable and the crew was great! A few free snacks offered would be nice!
Breeze Airways
8.1
Very good
178 reviews
Breeze Airways
8.1
Very good
178 reviews

Overall

8.1

Entertainment

6.6

Comfort

8.2

Food

6.7

Boarding

8.3

Crew

8.8

Reviews

1 / 11
10.0
Excellent

Dena,Dec 2024

LAS - BDL

It was comfortable and the crew was great! A few free snacks offered would be nice!
Southwest
8.0
Very good
4,287 reviews
Breeze Airways
8.1
Very good
178 reviews

Overall

8.1

Entertainment

6.6

Comfort

8.2

Food

6.7

Boarding

8.3

Crew

8.8

Reviews

1 / 11
10.0
Excellent

Dena,Dec 2024

LAS - BDL

It was comfortable and the crew was great! A few free snacks offered would be nice!
JetBlue
7.3
Good
2,925 reviews
Breeze Airways
8.1
Very good
178 reviews

Overall

8.1

Entertainment

6.6

Comfort

8.2

Food

6.7

Boarding

8.3

Crew

8.8

Reviews

1 / 11
10.0
Excellent

Dena,Dec 2024

LAS - BDL

It was comfortable and the crew was great! A few free snacks offered would be nice!
Frontier
6.0
Okay
3,295 reviews
Breeze Airways
8.1
Very good
178 reviews

Overall

8.1

Entertainment

6.6

Comfort

8.2

Food

6.7

Boarding

8.3

Crew

8.8

Reviews

1 / 11
10.0
Excellent

Dena,Dec 2024

LAS - BDL

It was comfortable and the crew was great! A few free snacks offered would be nice!

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.

  • What are the cheapest airlines to fly from Islip, New York to California one-way?

    The cheapest airlines for a one-way flight from Islip, New York to California are JetBlue ($141), Southwest ($149), and Frontier ($168).

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

    The most popular route from Islip, New York to California is Islip Long Island - Los Angeles. You may also consider Islip Long Island - Las Vegas Harry Reid Intl 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, New York to California?

    Currently, January is the cheapest month in which you can book a flight from Islip, New York to California (average of $246). Flying from Islip, New York to California in March is currently the most expensive (average of $327). 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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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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$388Average$529FlexibilityNo cancel feeOn-time63%

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