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$121+ 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 5/5. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — LAX
Mar 30 — Apr 61
Sun 3/30
Sun 4/6
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 March 25, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$255
(JetBlue)

One-way from

$121
(JetBlue)

Popular in

December

Cheapest in

September

Average price

$392
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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. 2% potential increase in price ($11 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
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Average for round-trip flights in March 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 March 25, 2025.

This JetBlue deal was found by Cheapflights users on 3/24. 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 6/56:00 amISP - LAS
1 stop11h 09mJetBlue
Sun 6/810:10 amLAS - ISP
1 stop7h 58mJetBlue
Deal found 3/24$255
This Frontier deal was found by Cheapflights users on 3/24. 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 4/29:00 amISP - LAS
1 stop15h 32mFrontier
Fri 4/1111:49 pmLAS - ISP
1 stop11h 39mFrontier
Deal found 3/24$298
This Frontier deal was found by Cheapflights users on 3/24. 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.
Sun 4/69:00 amISP - LAX
1 stop13h 18mFrontier
Sun 4/138:18 pmLAX - ISP
1 stop8h 52mFrontier
Deal found 3/24$298
This Booking.com deal was found by Cheapflights users on 3/24. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/89:04 pmISP - SFO
1 stop26h 43mFrontier
Sat 4/1210:30 pmSFO - ISP
1 stop30h 40mFrontier
Deal found 3/24$308
This JetBlue deal was found by Cheapflights users on 3/23. 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 7/186:00 amISP - LAX
1 stop11h 42mJetBlue
Sun 7/277:10 amLAX - ISP
1 stop11h 05mJetBlue
Deal found 3/23$355
This Southwest deal was found by Cheapflights users on 3/24. 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 4/226:10 amISP - LAX
1 stop8h 35mSouthwest
Tue 4/2911:40 pmLAX - ISP
2 stops9h 45mSouthwest
Deal found 3/24$356
This JetBlue deal was found by Cheapflights users on 3/23. 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.
Sun 5/46:00 amISP - SAN
1 stop8h 40mJetBlue
Thu 5/810:20 amSAN - ISP
1 stop8h 08mJetBlue
Deal found 3/23$388
This Southwest deal was found by Cheapflights users on 3/24. 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 5/266:10 pmISP - LAS
1 stop8h 35mSouthwest
Wed 5/285:45 amLAS - ISP
2 stops11h 35mSouthwest
Deal found 3/24$400
This Southwest deal was found by Cheapflights users on 3/24. 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.
Sat 9/203:40 pmISP - SAN
1 stop7h 35mSouthwest
Wed 9/2411:30 amSAN - ISP
1 stop7h 35mSouthwest
Deal found 3/24$427
This Southwest deal was found by Cheapflights users on 3/24. 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.
Fri 4/1110:30 amISP - SFO
2 stops11h 40mSouthwest
Tue 4/156:35 pmSFO - ISP
2 stops11h 35mSouthwest
Deal found 3/24$509
This JetBlue deal was found by Cheapflights users on 3/24. 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 5/26:00 amISP - SFO
1 stop9h 02mJetBlue
Mon 5/58:00 amSFO - ISP
1 stop10h 28mJetBlue
Deal found 3/24$547
This Booking.com deal was found by Cheapflights users on 3/24. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/53:18 pmISP - LAS
1 stop10h 25mMultiple Airlines
Tue 4/812:21 pmLAS - ISP
2 stops22h 34mMultiple Airlines
Deal found 3/24$550

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 March 25, 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

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Thu 6/5

6:00 am-2:09 pm

1 stop11h 09m

Las Vegas Harry Reid Intl

Sun 6/8

10:10 am-9:08 pm

1 stop7h 58m

$255

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Sat 4/5

3:18 pm-10:43 pm

1 stop10h 25m

Las Vegas Harry Reid Intl

Fri 4/11

11:49 pm-2:28 pm

1 stop11h 39m

$298

IslipLos Angeles

ISP - LAX

ISPLAX

Islip Long Island

Sun 4/6

9:00 am-7:18 pm

1 stop13h 18m

Los Angeles

Sun 4/13

8:18 pm-8:10 am

1 stop8h 52m

$298

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Tue 4/8

9:04 pm-8:47 pm

1 stop26h 43m

San Francisco

Sat 4/12

10:30 pm-8:10 am

1 stop30h 40m

$308

IslipLos Angeles

ISP - LAX

ISPLAX

Islip Long Island

Fri 7/18

6:00 am-2:42 pm

1 stop11h 42m

Los Angeles

Sun 7/27

7:10 am-9:15 pm

1 stop11h 05m

$355

IslipLos Angeles

ISP - LAX

ISPLAX

Islip Long Island

Tue 4/22

6:10 am-11:45 am

1 stop8h 35m

Los Angeles

Tue 4/29

11:40 pm-12:25 pm

2 stops9h 45m

$356

IslipSan Diego

ISP - SAN

ISPSAN

Islip Long Island

Sun 5/4

6:00 am-11:40 am

1 stop8h 40m

San Diego

Thu 5/8

10:20 am-9:28 pm

1 stop8h 08m

$388

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Mon 5/26

6:10 pm-11:45 pm

1 stop8h 35m

Las Vegas Harry Reid Intl

Wed 5/28

5:45 am-8:20 pm

2 stops11h 35m

$400

IslipSan Diego

ISP - SAN

ISPSAN

Islip Long Island

Sat 9/20

3:40 pm-8:15 pm

1 stop7h 35m

San Diego

Wed 9/24

11:30 am-10:05 pm

1 stop7h 35m

$427

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Fri 4/11

10:30 am-7:10 pm

2 stops11h 40m

San Francisco

Tue 4/15

6:35 pm-9:10 am

2 stops11h 35m

$509

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/23

Showing 1-10 of 37 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 $330). 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 March 25, 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 March 25, 2025.
See what other customers who have flown with Southwest, Breeze Airways 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.
Southwest
8.0
Very good
4,272 reviews

Boarding

8.2

Overall

8.0

Crew

8.6

Food

7.1

Comfort

8.0

Entertainment

7.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Southwest
8.0
Very good
4,272 reviews
Southwest
8.0
Very good
4,272 reviews

Boarding

8.2

Overall

8.0

Crew

8.6

Food

7.1

Comfort

8.0

Entertainment

7.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Breeze Airways
8.0
Very good
156 reviews
Southwest
8.0
Very good
4,272 reviews

Boarding

8.2

Overall

8.0

Crew

8.6

Food

7.1

Comfort

8.0

Entertainment

7.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
JetBlue
7.3
Good
2,924 reviews
Southwest
8.0
Very good
4,272 reviews

Boarding

8.2

Overall

8.0

Crew

8.6

Food

7.1

Comfort

8.0

Entertainment

7.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Frontier
6.0
Okay
3,273 reviews
Southwest
8.0
Very good
4,272 reviews

Boarding

8.2

Overall

8.0

Crew

8.6

Food

7.1

Comfort

8.0

Entertainment

7.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

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 ($121), Frontier ($149), and Southwest ($181).

  • 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 $330). 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

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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 March 25, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$344Average$576FlexibilityNo cancel feeOn-time63%
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