What is the cheapest airline to fly from Islip, New York to Los Angeles round-trip?

According to our current data, Southwest ($388), offers the cheapest pricing from Islip, New York to Los Angeles. Southwest is currently priced 24% below the average price you’ll pay for this route.

What is the cheapest day to fly from Islip, New York to Los Angeles?

Travelers seeking maximum savings on their Islip, New York to Los Angeles flight should consider departing on Tuesday afternoons when fares are most often at their lowest. Thursday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

In terms of precipitation, rainfall in Los Angeles 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 Los Angeles when rainfall is around 0.0 in.

If weather is an important factor for your trip to Los Angeles, 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).

What is the cheapest day to fly round-trip from Islip, New York to Los Angeles?

It’s generally more expensive to depart on a Wednesday, if you have to leave on this day you can still search on Cheapflights to find great options that meet your needs.

How far in advance should I book a flight from Islip, New York to Los Angeles?

Travelers have found it’s best to book a flight 53 days in advance to save up to 78% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 53 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from Islip, New York to Los Angeles 1-2 weeks in advance for as low as $363, or $581 for flights within the next 24 hours.

What is the cheapest month to fly from Islip, New York to Los Angeles?

Our data shows that January tends to be the cheapest month to fly to Los Angeles from Islip, New York. Users have commonly found prices around $360 for the month, but tickets can be as low as $143. Due to multiple factors, prepare for potentially higher prices in December.

Can I find deals for flights from Islip to Los Angeles that include hotel bookings?

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

How can I find direct flights from Islip to Los Angeles?

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

Can I find deals for business class flights from Islip to Los Angeles?

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

$95+ Flights from Islip, NY to Los Angeles

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Cheap flight deals from Islip to Los Angeles

Round-trip from	$187 (CheapOair)
One-way from	$95 (Lucky2Go)
Popular in	November
Cheapest in	April
Average price	$356

From Islip Long Island to Los Angeles

Search Deals

One-way flight from Islip Long Island to Los Angeles

Search Deals

Highest demand for flights based on searches. 24% potential increase in price ($167 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 7% potential price decrease ($37 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in August 2025

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Find flight deals from Islip to Los Angeles

Cheapest flights from Islip to Los Angeles
Explore the most affordable flight options available from Islip to Los Angeles. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 16, 2025.

Thu 9/411:45 amISP - LAX

1 stop23h 57mFrontier

Fri 9/52:46 pmLAX - ISP

1 stop17h 09mFrontier

Deal found 8/14

$187

Mon 10/204:58 pmISP - LAX

1 stop18h 30mFrontier

Thu 10/232:27 pmLAX - ISP

1 stop17h 10mFrontier

Deal found 8/15

$216

Thu 9/2511:40 amISP - LAX

1 stop23h 32mFrontier

Fri 10/32:21 pmLAX - ISP

1 stop17h 34mFrontier

Deal found 8/14

$221

Wed 9/38:00 amISP - LAX

1 stop27h 42mFrontier

Thu 9/112:46 pmLAX - ISP

1 stop16h 54mFrontier

Deal found 8/15

$226

Sat 9/135:05 pmISP - LAX

1 stop18h 07mFrontier

Sat 9/201:23 pmLAX - ISP

2 stops18h 17mFrontier

Deal found 8/14

$229

Sun 10/511:25 amISP - LAX

1 stop23h 47mFrontier

Thu 10/92:27 pmLAX - ISP

1 stop17h 10mFrontier

Deal found 8/14

$231

Wed 9/38:00 amISP - LAX

1 stop27h 42mFrontier

Mon 9/81:16 pmLAX - ISP

2 stops18h 24mFrontier

Deal found 8/14

$232

Wed 9/1011:35 amISP - LAX

1 stop24h 07mFrontier

Sun 9/142:21 pmLAX - ISP

1 stop17h 19mFrontier

Deal found 8/15

$241

Sat 9/65:05 pmISP - LAX

1 stop18h 37mFrontier

Mon 9/82:46 pmLAX - ISP

1 stop16h 54mFrontier

Deal found 8/14

$245

Thu 9/2511:40 amISP - LAX

1 stop23h 32mFrontier

Sun 9/282:21 pmLAX - ISP

1 stop17h 19mFrontier

Deal found 8/14

$254

Best flights from Islip to Los Angeles
Discover carefully curated flight deals from Islip to Los Angeles that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 16, 2025.

Sat 10/184:58 pmISP - LAX

1 stop18h 30mFrontier

Tue 10/212:27 pmLAX - ISP

1 stop17h 30mFrontier

Deal found 8/14

$187

Thu 9/1111:25 amISP - LAX

1 stop24h 17mFrontier

Mon 9/152:21 pmLAX - ISP

1 stop17h 19mFrontier

Deal found 8/14

$187

Sun 9/711:35 amISP - LAX

1 stop24h 07mFrontier

Fri 9/122:46 pmLAX - ISP

1 stop17h 09mFrontier

Deal found 8/14

$187

Sat 9/275:05 pmISP - LAX

1 stop18h 07mFrontier

Tue 10/142:27 pmLAX - ISP

1 stop17h 30mFrontier

Deal found 8/14

$187

Wed 10/111:35 amISP - LAX

1 stop23h 37mFrontier

Tue 10/72:27 pmLAX - ISP

1 stop17h 30mFrontier

Deal found 8/14

$187

Thu 9/411:45 amISP - LAX

1 stop23h 57mFrontier

Fri 9/52:46 pmLAX - ISP

1 stop17h 09mFrontier

Deal found 8/14

$187

Wed 9/2411:35 amISP - LAX

1 stop23h 37mFrontier

Mon 9/292:21 pmLAX - ISP

1 stop17h 19mFrontier

Deal found 8/14

$187

Wed 9/1011:35 amISP - LAX

1 stop24h 07mFrontier

Mon 9/152:21 pmLAX - ISP

1 stop17h 19mFrontier

Deal found 8/13

$215

Mon 10/204:58 pmISP - LAX

1 stop18h 30mFrontier

Thu 10/232:27 pmLAX - ISP

1 stop17h 10mFrontier

Deal found 8/14

$216

Last-minute flights from Islip to Los Angeles
Discover last-minute flight deals from Islip to Los Angeles. Data last updated August 16, 2025 and is based on user searches.

Wed 8/208:00 amISP - LAX

1 stop27h 08mFrontier

Tue 8/262:15 pmLAX - ISP

1 stop30h 26mFrontier

Deal found 8/13

$364

Thu 8/217:33 pmISP - LAX

1 stop15h 35mFrontier

Sun 8/242:15 pmLAX - ISP

1 stop14h 53mFrontier

Deal found 8/14

$342

Fri 8/227:33 pmISP - LAX

1 stop15h 35mFrontier

Tue 8/262:15 pmLAX - ISP

1 stop30h 26mFrontier

Deal found 8/12

$299

Fri 8/227:33 pmISP - LAX

1 stop15h 35mFrontier

Sun 8/242:15 pmLAX - ISP

1 stop14h 53mFrontier

Deal found 8/15

$336

Fri 8/229:58 amISP - LAX

1 stop25h 10mFrontier

Wed 8/272:15 pmLAX - ISP

1 stop30h 44mFrontier

Deal found 8/13

$353

Sat 8/237:33 pmISP - LAX

1 stop15h 35mFrontier

Sun 8/243:30 pmLAX - ISP

2 stops17h 46mFrontier

Deal found 8/14

$335

Mon 8/257:27 pmISP - LAX

1 stop20h 33mFrontier

Tue 9/22:15 pmLAX - ISP

1 stop30h 26mFrontier

Deal found 8/15

$314

Mon 8/257:27 pmISP - LAX

1 stop20h 33mFrontier

Wed 8/272:15 pmLAX - ISP

1 stop25h 23mFrontier

Deal found 8/14

$330

Wed 9/38:00 amISP - LAX

1 stop27h 42mFrontier

Thu 9/112:46 pmLAX - ISP

1 stop16h 54mFrontier

Deal found 8/15

$226

Wed 9/38:00 amISP - LAX

1 stop27h 42mFrontier

Mon 9/81:16 pmLAX - ISP

2 stops18h 24mFrontier

Deal found 8/14

$232

Thu 9/411:45 amISP - LAX

1 stop23h 57mFrontier

Fri 9/52:46 pmLAX - ISP

1 stop17h 09mFrontier

Deal found 8/14

$187

Thu 9/411:45 amISP - LAX

2 stops23h 46mMultiple Airlines

Fri 9/52:46 pmLAX - ISP

1 stop17h 09mMultiple Airlines

Deal found 8/14

$263

One-way flights from Islip to Los Angeles
Search for one-way flight options from Islip to Los Angeles. Find affordable one-way fares based on user searches. Data last updated August 16, 2025.

Sun 10/269:47 pmISP - LAX

1 stop13h 41mFrontier

Deal found 8/15

$95

Sun 9/711:35 amISP - LAX

1 stop24h 07mFrontier

Deal found 8/15

$100

Sat 10/254:58 pmISP - LAX

1 stop18h 30mFrontier

Deal found 8/15

$109

Sat 9/205:05 pmISP - LAX

1 stop18h 07mFrontier

Deal found 8/14

$123

Tue 8/266:05 amISP - LAX

1 stop9h 55mFrontier

Deal found 8/16

$129

Tue 10/79:37 pmISP - LAX

1 stop13h 51mFrontier

Deal found 8/14

$131

Sat 9/135:05 pmISP - LAX

2 stops22h 08mFrontier

Deal found 8/14

$134

Fri 8/227:33 pmISP - LAX

1 stop15h 35mFrontier

Deal found 8/15

$135

Sun 9/2111:25 amISP - LAX

1 stop23h 47mFrontier

Deal found 8/15

$138

Wed 10/84:58 pmISP - LAX

1 stop18h 30mFrontier

Deal found 8/15

$139

Fly from

Fly to

Route

Depart

Return

Price

IslipLos Angeles

ISP - LAX

ISPLAX

Islip Long Island

Sat 10/18

4:58 pm-8:28 am

1 stop18h 30m

Los Angeles

Tue 10/21

2:27 pm-10:57 am

1 stop17h 30m

$187

IslipLos Angeles

ISP - LAX

ISPLAX

Islip Long Island

Thu 9/11

11:25 am-8:42 am

1 stop24h 17m

Los Angeles

Mon 9/15

2:21 pm-10:40 am

1 stop17h 19m

$187

IslipLos Angeles

ISP - LAX

ISPLAX

Islip Long Island

Sun 9/7

11:35 am-8:42 am

1 stop24h 07m

Los Angeles

Fri 9/12

2:46 pm-10:55 am

1 stop17h 09m

$187

IslipLos Angeles

ISP - LAX

ISPLAX

Islip Long Island

Sat 9/27

5:05 pm-8:12 am

1 stop18h 07m

Los Angeles

Tue 10/14

2:27 pm-10:57 am

1 stop17h 30m

$187

IslipLos Angeles

ISP - LAX

ISPLAX

Islip Long Island

Wed 10/1

11:35 am-8:12 am

1 stop23h 37m

Los Angeles

Tue 10/7

2:27 pm-10:57 am

1 stop17h 30m

$187

IslipLos Angeles

ISP - LAX

ISPLAX

Islip Long Island

Thu 9/4

11:45 am-8:42 am

1 stop23h 57m

Los Angeles

Fri 9/5

2:46 pm-10:55 am

1 stop17h 09m

$187

IslipLos Angeles

ISP - LAX

ISPLAX

Islip Long Island

Wed 9/24

11:35 am-8:12 am

1 stop23h 37m

Los Angeles

Mon 9/29

2:21 pm-10:40 am

1 stop17h 19m

$187

IslipLos Angeles

ISP - LAX

ISPLAX

Islip Long Island

Wed 9/10

11:35 am-8:42 am

1 stop24h 07m

Los Angeles

Mon 9/15

2:21 pm-10:40 am

1 stop17h 19m

$215

IslipLos Angeles

ISP - LAX

ISPLAX

Islip Long Island

Mon 10/20

4:58 pm-8:28 am

1 stop18h 30m

Los Angeles

Thu 10/23

2:27 pm-10:37 am

1 stop17h 10m

$216

IslipLos Angeles

ISP - LAX

ISPLAX

Islip Long Island

Sun 10/26

9:47 pm-8:28 am

1 stop13h 41m

$95

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/15

Showing 1-10 of 16 results

Best time to book a flight from Islip to Los Angeles

Have a flexible travel schedule? Discover the best time to fly to Los Angeles 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 Los Angeles

What is the cheapest month to book a flight from Islip, New York to Los Angeles?

Currently, January is the cheapest month in which you can book a flight from Islip, New York to Los Angeles (average of $246). Flying from Islip, New York to Los Angeles 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 LAX?

When flying from Islip, New York to Los Angeles, the time of day you fly usually plays a role in the price. Save by searching for a flight in the morning, which can drop the price by up to 13% versus a flight at noon.

Reviews of airlines servicing Los Angeles

See what other customers who have flown with Southwest from Islip to Los Angeles have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Southwest

8.0

Very good

4,246 reviews

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

4,246 reviews

Southwest

8.0

Very good

4,246 reviews

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

Related info for your journey

What is the cheapest airline to fly from Islip, New York to Los Angeles round-trip?
According to our current data, Southwest ($388), offers the cheapest pricing from Islip, New York to Los Angeles. Southwest is currently priced 24% below the average price you’ll pay for this route.
Can I find deals for flights from Islip to Los Angeles that include hotel bookings?
Yes. In addition to deals on Islip to Los Angeles flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Islip to Los Angeles?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Islip to Los Angeles.
Can I find deals for business class flights from Islip to Los Angeles?
Yes. Cheapflights offers flight deals from Islip to Los Angeles 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 Los Angeles?
Currently, January is the cheapest month in which you can book a flight from Islip, New York to Los Angeles (average of $246). Flying from Islip, New York to Los Angeles 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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Menifee

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Browse thousands of different options on Cheapflights for your next trip

Top airline flying from Islip to Los Angeles

Airline	Cheapest	Average	Flexibility	On-time
Southwest	Cheapest$388	Average$504	FlexibilityNo cancel fee	On-time63%

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$95+ Cheap flights from Islip, NY to Los Angeles (ISP - LAX)

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 10/26. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Islip to Los Angeles with Cheapflights

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Cheap flight deals from Islip to Los Angeles

Round-trip from

One-way from

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Average price

Find flight deals from Islip to Los Angeles

Cheapest flights from Islip to Los AngelesExplore the most affordable flight options available from Islip to Los Angeles. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 16, 2025.

Explore the most affordable flight options available from Islip to Los Angeles. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 16, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Islip to Los Angeles that are best for you.

Best time to book a flight from Islip to Los Angeles

Have a flexible travel schedule? Discover the best time to fly to Los Angeles from Islip with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Islip to Los Angeles

What is the cheapest month to book a flight from Islip, New York to Los Angeles?

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

Find hourly flight availability from Islip to Los Angeles. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 16, 2025.

Reviews of airlines servicing Los Angeles

See what other customers who have flown with Southwest from Islip to Los Angeles have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

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

What is the cheapest airline to fly from Islip, New York to Los Angeles round-trip?

Can I find deals for flights from Islip to Los Angeles that include hotel bookings?

How can I find direct flights from Islip to Los Angeles?

Can I find deals for business class flights from Islip to Los Angeles?

What is the cheapest month to book a flight from Islip, New York to Los Angeles?

Traveling to a place near Los Angeles?

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Islip to Los Angeles

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Top airline flying from Islip to Los Angeles

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Cheapest flights from Islip to Los Angeles
Explore the most affordable flight options available from Islip to Los Angeles. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 16, 2025.