What is the cheapest airline that flies from Islip Long Island to California?

Frontier, JetBlue, and Southwest are the most popular carriers operating from Islip Long Island to California

What airlines fly to California?

United Airlines, JetBlue and Delta are the top three most popular airlines that fly to California from Islip, New York according to our data. United Airlines is the first choice among our users, with 36% of people opting to fly with this airline when traveling to California. Keep in mind that there are 10 different airlines that fly to California on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Islip Long Island Airport to California?

Prices for flights from Islip Long Island Airport to California are refreshed on a daily basis.

How many operators does momondo search for flights from Islip Long Island Airport to California?

As of December 2025, there are 3 operators available to choose from for flights from Islip Long Island Airport to California.

How old do you have to be to fly from Islip Long Island Airport to California?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Islip Long Island Airport to California.

What documentation or ID do you need to fly to California?

The travel and health documents required for your trip to California can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at California. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$81 Cheap Flights from Islip to California in 2025/26

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Find the cheapest flights from Islip, New York to California

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

3:34 pm - 10:15 am

ISP

LAS

21h 41m1 stop

11:03 pm - 2:39 pm

LAS

ISP

12h 36m1 stop

$166Frontier

Thu, Feb 19 - Wed, Mar 4

8:40 pm - 9:43 am

ISP

LAS

16h 03m1 stop

10:33 pm - 7:03 pm

LAS

ISP

17h 30m1 stop

$182Frontier

Thu, Jan 8 - Wed, Jan 14

7:56 pm - 10:25 am

ISP

LAS

17h 29m1 stop

10:33 pm - 10:46 pm

LAS

ISP

21h 13m1 stop

$183Frontier

Sat, Jan 10 - Tue, Jan 13

2:04 pm - 9:43 am

ISP

LAS

22h 39m1 stop

11:03 pm - 7:45 pm

LAS

ISP

17h 42m1 stop

$204Frontier

Mon, Jan 5 - Wed, Jan 7

8:40 pm - 9:43 am

ISP

LAS

16h 03m1 stop

12:59 am - 10:46 pm

LAS

ISP

18h 47m2 stops

$211Frontier

Thu, Jan 8 - Tue, Jan 13

4:40 pm - 7:19 pm

ISP

LAX

29h 39m1 stop

11:59 pm - 7:08 pm

LAX

ISP

16h 09m2 stops

$307Multiple Airlines

Mon, Jan 5 - Fri, Jan 9

6:00 am - 1:25 pm

ISP

SFO

10h 25m1 stop

9:30 pm - 11:55 am

SFO

ISP

11h 25m1 stop

$372Southwest

Tue, Jan 20 - Tue, Jan 27

12:40 pm - 10:20 pm

ISP

SFO

12h 40m2 stops

7:40 am - 9:55 pm

SFO

ISP

11h 15m2 stops

$377Southwest

Tue, Jan 20 - Tue, Jan 27

6:00 am - 2:20 pm

ISP

SAN

11h 20m1 stop

12:00 pm - 9:55 pm

SAN

ISP

6h 55m1 stop

$380Southwest

Thu, Jan 29 - Wed, Feb 4

3:45 pm - 9:00 pm

ISP

SAN

8h 15m1 stop

9:40 am - 9:55 pm

SAN

ISP

9h 15m2 stops

$385Southwest

Thu, Jan 29 - Wed, Feb 4

Southwest flights from Islip, New York to California

Our best Southwest deals on Islip, New York to California flight tickets

Southwest

Jan 17

ISP3:35 pmIslip Long Island

8h 15m

1 stop

LAS8:50 pmLas Vegas Harry Reid Intl

Jan 20

LAS10:20 pmLas Vegas Harry Reid Intl

10h 35m

1 stop

ISP11:55 amIslip Long Island

$359

Find similar

Southwest

Jan 20

ISP6:00 amIslip Long Island

10h 25m

1 stop

SFO1:25 pmSan Francisco

Jan 27

SFO9:30 pmSan Francisco

11h 25m

1 stop

ISP11:55 amIslip Long Island

$372

Find similar

Southwest

Jan 20

ISP12:40 pmIslip Long Island

12h 40m

2 stops

SFO10:20 pmSan Francisco

Jan 27

SFO7:40 amSan Francisco

11h 15m

2 stops

ISP9:55 pmIslip Long Island

$377

Find similar

JetBlue flights from Islip, New York to California

Our best JetBlue deals on Islip, New York to California flight tickets

JetBlue

Jan 27

ISP12:25 pmIslip Long Island

10h 48m

1 stop

LAS8:13 pmLas Vegas Harry Reid Intl

Feb 3

LAS9:55 pmLas Vegas Harry Reid Intl

7h 57m

1 stop

ISP8:52 amIslip Long Island

$293

Find similar

JetBlue

Jan 30

ISP12:25 pmIslip Long Island

10h 48m

1 stop

LAS8:13 pmLas Vegas Harry Reid Intl

Feb 3

LAS9:55 pmLas Vegas Harry Reid Intl

7h 57m

1 stop

ISP8:52 amIslip Long Island

$327

Find similar

JetBlue

Jan 14

ISP12:25 pmIslip Long Island

10h 48m

1 stop

LAS8:13 pmLas Vegas Harry Reid Intl

Jan 21

LAS9:45 pmLas Vegas Harry Reid Intl

8h 17m

1 stop

ISP9:02 amIslip Long Island

$330

Find similar

momondo Fare Finder

Use the filters below to find and compare flights from Islip, New York to California that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Thu 2/19

3:34 pm-10:15 am

1 stop21h 41m

Las Vegas Harry Reid Intl

Wed 3/4

11:03 pm-2:39 pm

1 stop12h 36m

$166

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Thu 1/8

8:40 pm-9:43 am

1 stop16h 03m

Las Vegas Harry Reid Intl

Wed 1/14

10:33 pm-7:03 pm

1 stop17h 30m

$182

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Sat 1/10

7:56 pm-10:25 am

1 stop17h 29m

Las Vegas Harry Reid Intl

Tue 1/13

10:33 pm-10:46 pm

1 stop21h 13m

$183

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Mon 1/5

2:04 pm-9:43 am

1 stop22h 39m

Las Vegas Harry Reid Intl

Wed 1/7

11:03 pm-7:45 pm

1 stop17h 42m

$204

IslipLas Vegas

ISP - LAS

ISPLAS

Islip Long Island

Thu 1/8

8:40 pm-9:43 am

1 stop16h 03m

Las Vegas Harry Reid Intl

Tue 1/13

12:59 am-10:46 pm

2 stops18h 47m

$211

IslipLos Angeles

ISP - LAX

ISPLAX

Islip Long Island

Mon 1/5

4:40 pm-7:19 pm

1 stop29h 39m

Los Angeles

Fri 1/9

11:59 pm-7:08 pm

2 stops16h 09m

$307

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Tue 1/20

6:00 am-1:25 pm

1 stop10h 25m

San Francisco

Tue 1/27

9:30 pm-11:55 am

1 stop11h 25m

$372

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Tue 1/20

12:40 pm-10:20 pm

2 stops12h 40m

San Francisco

Tue 1/27

7:40 am-9:55 pm

2 stops11h 15m

$377

IslipSan Diego

ISP - SAN

ISPSAN

Islip Long Island

Thu 1/29

6:00 am-2:20 pm

1 stop11h 20m

San Diego

Wed 2/4

12:00 pm-9:55 pm

1 stop6h 55m

$380

IslipSan Diego

ISP - SAN

ISPSAN

Islip Long Island

Thu 1/29

3:45 pm-9:00 pm

1 stop8h 15m

San Diego

Wed 2/4

9:40 am-9:55 pm

2 stops9h 15m

$385

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Islip, New York to California

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the cheapest day to depart on your flight to California?

The cheapest day to depart from Islip, New York to California is on a Thursday. Travelers who choose to depart for California on a Thursday will often find tickets for as low as $748. Be sure to avoid booking your departure on a Tuesday as prices are generally higher than usual. According to our data, the average ticket price to California on Tuesday is $776.

What is the cheapest time of day to depart on your flight to California?

The cheapest time of day to fly to California is in the morning when flights can be purchased for as low as $591. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $678 on average. Flights to California from Islip, New York in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.

Can stopping save me money on Islip, New York to California flights?

You could potentially save up to 15% on your flight if you consider stops on a Islip, New York to California flight.

Cheap Islip, New York to California flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Islip, New York to California

Fastest flight time	7h 10m
Direct flights	None

The fastest flight from Islip, New York to California takes 7h 10m

There are no direct flights from Islip, New York to California. There are no popular flight routes from Islip, New York to California.

Search flight deals

When did momondo last update prices for flights from Islip Long Island Airport to California?
Prices for flights from Islip Long Island Airport to California are refreshed on a daily basis.
How many operators does momondo search for flights from Islip Long Island Airport to California?
As of December 2025, there are 3 operators available to choose from for flights from Islip Long Island Airport to California.
How old do you have to be to fly from Islip Long Island Airport to California?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Islip Long Island Airport to California.
What documentation or ID do you need to fly to California?
The travel and health documents required for your trip to California can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at California. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from Islip, New York to California

Compare and see reviews for airlines that fly from Islip, New York to California with momondo

Airline	Rating	Free Cancellation	Price
Southwest	PriceFrom $344	Free Cancellation	Rating 8.0 4,254 reviews		Search Southwest flights

Why use momondo?

Why should I use momondo to find a flight deal from Islip to California?

It is quick and easy to find Islip to California flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to California that suits you.

Can I find flights from Islip to California with flexible booking policies on momondo?

All flight searches from Islip to California on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Islip to California?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Islip to California.

I’m not ready to book a flight from Islip to California right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Islip to California flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.