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$128+ 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 8/19. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — LAX
Aug 3 — Aug 101
Sun 8/3
Sun 8/10
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 July 29, 2025.

Round-trip from

$259
(CheapOair)

One-way from

$128
(Cheapflightsfares)

Popular in

December

Cheapest in

September

Average price

$372
From Islip Long Island to California
Search Deals
One-way flight from Islip Long Island to California
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($31 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 July 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 July 29, 2025.

This CheapOair deal was found by Cheapflights users on 7/27. 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.
Sat 9/135:05 pmISP - LAS
1 stop19h 05mFrontier
Sat 9/2011:04 pmLAS - ISP
1 stop8h 36mFrontier
Deal found 7/27$259
This JetBlue deal was found by Cheapflights users on 7/29. 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 - LAX
1 stop11h 35mJetBlue
Tue 9/169:22 pmLAX - ISP
1 stop10h 28mJetBlue
Deal found 7/29$261
This CheapOair deal was found by Cheapflights users on 7/29. 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.
Wed 8/138:37 pmISP - LAX
1 stop23h 31mFrontier
Tue 8/192:15 pmLAX - ISP
1 stop30h 26mFrontier
Deal found 7/29$279
This Gotogate deal was found by Cheapflights users on 7/28. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/128:00 amISP - SFO
1 stop29h 25mFrontier
Sat 8/168:53 pmSFO - ISP
1 stop23h 54mFrontier
Deal found 7/28$287
This Southwest deal was found by Cheapflights users on 7/27. 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 11/153:40 pmISP - LAS
1 stop8h 40mSouthwest
Wed 11/1911:40 pmLAS - ISP
1 stop9h 50mSouthwest
Deal found 7/27$333
This Southwest deal was found by Cheapflights users on 7/28. 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 8/274:00 pmISP - LAX
1 stop9h 35mSouthwest
Wed 9/37:05 amLAX - ISP
1 stop12h 00mSouthwest
Deal found 7/28$338
This Trip.com deal was found by Cheapflights users on 7/27. 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 9/26:05 amISP - LAS
2 stops31h 10mMultiple Airlines
Fri 9/510:33 amLAS - ISP
1 stop21h 22mMultiple Airlines
Deal found 7/27$342
This JetBlue deal was found by Cheapflights users on 7/28. 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 10/3112:15 pmISP - LAS
1 stop10h 46mJetBlue
Sun 11/210:10 pmLAS - ISP
1 stop8h 32mJetBlue
Deal found 7/28$351
This Southwest deal was found by Cheapflights users on 7/29. 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 9/176:05 amISP - SJC
1 stop14h 30mSouthwest
Tue 9/239:20 amSJC - ISP
2 stops9h 45mSouthwest
Deal found 7/29$377
This Trip.com deal was found by Cheapflights users on 7/28. 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.
Wed 8/278:00 amISP - LAX
2 stops27h 17mMultiple Airlines
Tue 9/212:30 amLAX - ISP
2 stops20h 11mMultiple Airlines
Deal found 7/28$387
This Southwest deal was found by Cheapflights users on 7/29. 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.
Thu 9/113:05 pmISP - SAN
1 stop9h 30mSouthwest
Sun 9/149:10 pmSAN - ISP
1 stop11h 50mSouthwest
Deal found 7/29$408
This Southwest deal was found by Cheapflights users on 7/27. 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 9/306:05 amISP - ONT
1 stop8h 30mSouthwest
Sat 10/47:45 amONT - ISP
2 stops10h 50mSouthwest
Deal found 7/27$461

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 July 29, 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

Sat 9/13

5:05 pm-9:10 am

1 stop19h 05m

Las Vegas Harry Reid Intl

Sat 9/20

11:04 pm-10:40 am

1 stop8h 36m

$259

IslipLos Angeles

ISP - LAX

ISPLAX

Islip Long Island

Fri 9/12

11:35 am-8:10 pm

1 stop11h 35m

Los Angeles

Tue 9/16

9:22 pm-10:50 am

1 stop10h 28m

$261

IslipLos Angeles

ISP - LAX

ISPLAX

Islip Long Island

Wed 8/13

8:37 pm-5:08 pm

1 stop23h 31m

Los Angeles

Tue 8/19

2:15 pm-11:41 pm

1 stop30h 26m

$279

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Tue 8/12

8:00 am-10:25 am

1 stop29h 25m

San Francisco

Sat 8/16

8:53 pm-11:47 pm

1 stop23h 54m

$287

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Sat 11/15

3:40 pm-9:20 pm

1 stop8h 40m

Las Vegas Harry Reid Intl

Wed 11/19

11:40 pm-12:30 pm

1 stop9h 50m

$333

IslipLos Angeles

ISP - LAX

ISPLAX

Islip Long Island

Wed 8/27

4:00 pm-10:35 pm

1 stop9h 35m

Los Angeles

Wed 9/3

8:30 am-10:05 pm

2 stops10h 35m

$338

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Tue 9/2

6:05 am-10:15 am

2 stops31h 10m

Las Vegas Harry Reid Intl

Fri 9/5

10:33 am-10:55 am

1 stop21h 22m

$342

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Fri 10/31

12:15 pm-8:01 pm

1 stop10h 46m

Las Vegas Harry Reid Intl

Sun 11/2

10:10 pm-9:42 am

1 stop8h 32m

$351

IslipSan Jose

ISP - SJC

ISPSJC

Islip Long Island

Wed 9/17

6:05 am-5:35 pm

1 stop14h 30m

San Jose

Tue 9/23

9:20 am-10:05 pm

2 stops9h 45m

$377

IslipLos Angeles

ISP - LAX

ISPLAX

Islip Long Island

Wed 8/27

8:00 am-8:17 am

2 stops27h 17m

Los Angeles

Tue 9/2

12:30 am-11:41 pm

2 stops20h 11m

$387

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/27

Showing 1-10 of 40 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 $326). 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 July 29, 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.

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 July 29, 2025.
Read through reviews of airlines operating flights from Islip to California, such as Southwest, Breeze Airways, and JetBlue. 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
4,238 reviews

Crew

8.6

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Food

7.0

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Southwest
8.0
Very good
4,238 reviews
Southwest
8.0
Very good
4,238 reviews

Crew

8.6

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Food

7.0

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Breeze Airways
8.0
Very good
190 reviews
Southwest
8.0
Very good
4,238 reviews

Crew

8.6

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Food

7.0

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
JetBlue
7.3
Good
2,913 reviews
Southwest
8.0
Very good
4,238 reviews

Crew

8.6

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Food

7.0

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Frontier
5.9
Fair
3,238 reviews
Southwest
8.0
Very good
4,238 reviews

Crew

8.6

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Food

7.0

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.

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 Frontier ($128), JetBlue ($141), and Southwest ($172).

  • 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 - 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, 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 $326). 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 July 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$350Average$528FlexibilityNo cancel feeOn-time63%

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