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$192+ Cheap flights from Islip, NY to San Diego (ISP - SAN)

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 8/7. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — SAN
Jul 8 — Jul 151
Tue 7/8
Tue 7/15
1 adult, Economy
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Cheap flight deals from Islip to San Diego

Discover tips and strategies to find the most affordable flight options for your journey from Islip (ISP) to San Diego (SAN). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated July 3, 2025.

Round-trip from

$351
(Southwest)

One-way from

$192
(Cheapflightsfares)

Popular in

December

Cheapest in

October

Average price

$402
From Islip Long Island to San Diego
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One-way flight from Islip Long Island to San Diego
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Highest demand for flights based on searches. 6% potential increase in price ($25 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($13 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 San Diego

Cheapest flights from Islip to San Diego
Explore the most affordable flight options available from Islip to San Diego. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 3, 2025.

This Southwest deal was found by Cheapflights users on 7/1. 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 9/94:00 pmISP - SAN
1 stop8h 45mSouthwest
Tue 9/1611:30 amSAN - ISP
1 stop7h 35mSouthwest
Deal found 7/1$351
This Expedia deal was found by Cheapflights users on 7/1. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/48:21 pmISP - SAN
2 stops22h 38mFrontier
Wed 7/97:04 pmSAN - ISP
2 stops15h 00mFrontier
Deal found 7/1$464
This Trip.com deal was found by Cheapflights users on 7/1. 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 7/158:00 amISP - SAN
2 stops28h 55mMultiple Airlines
Fri 7/185:13 pmSAN - ISP
2 stops23h 29mMultiple Airlines
Deal found 7/1$624
This KAYAK deal was found by Cheapflights users on 7/2. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/82:25 pmISP - SAN
1 stop25h 11mBreeze Airways
Wed 9/101:12 pmSAN - ISP
1 stop26h 44mBreeze Airways
Deal found 7/2$708

Cheapflights Fare Finder

Customize your flight search to find flights from Islip to San Diego 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 3, 2025.
Use the filters below to find and compare flights from Islip to San Diego that are best for you.

Fly from

Islip

Fly to

San Diego

Route

Depart

Return

Price

IslipSan Diego

ISP - SAN

ISPSAN

Islip Long Island

Tue 9/9

4:00 pm-9:45 pm

1 stop8h 45m

San Diego

Tue 9/16

11:30 am-10:05 pm

1 stop7h 35m

$351

IslipSan Diego

ISP - SAN

ISPSAN

Islip Long Island

Tue 7/15

8:00 am-9:55 am

2 stops28h 55m

San Diego

Fri 7/18

5:13 pm-7:42 pm

2 stops23h 29m

$624

IslipSan Diego

ISP - SAN

ISPSAN

Islip Long Island

Mon 9/8

2:25 pm-12:36 pm

1 stop25h 11m

San Diego

Wed 9/10

1:12 pm-6:56 pm

1 stop26h 44m

$708

IslipSan Diego

ISP - SAN

ISPSAN

Islip Long Island

Thu 8/7

2:05 pm-11:57 pm

2 stops12h 52m

$192

IslipSan Diego

ISP - SAN

ISPSAN

Islip Long Island

Wed 7/30

6:25 am-12:05 pm

1 stop8h 40m

$250

IslipSan Diego

ISP - SAN

ISPSAN

Islip Long Island

Sun 7/27

7:39 pm-12:13 pm

1 stop19h 34m

$394

IslipSan Diego

ISP - SAN

ISPSAN

Islip Long Island

Tue 7/8

7:30 am-9:12 pm

3 stops16h 42m

$739

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/2

Best time to book a flight from Islip to San Diego

Have a flexible travel schedule? Discover the best time to fly to San Diego 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 San Diego

What is the cheapest month to book a flight from Islip, New York to San Diego?

Currently, August is the cheapest month in which you can book a flight from Islip, New York to San Diego (average of $286). Flying from Islip, New York to San Diego in March is currently the most expensive (average of $366). 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 SAN?

Find hourly flight availability from Islip to San Diego. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 3, 2025.

A simple way to save on the total cost of your ticket is to fly from Islip, New York to San Diego at noon. If you’re flexible enough to do this you can expect to save up to 58% on your trip compared to booking a flight in the morning.

Reviews of airlines servicing San Diego

Get insights into the airlines that provide service to San Diego. 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 San Diego. Reviews last updated July 3, 2025.
Peruse reviews from past customers who have flown with Breeze Airways, Southwest, and Frontier from Islip to San Diego to help guide your decision. 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
183 reviews

Overall

8.1

Food

6.8

Comfort

8.2

Boarding

8.3

Entertainment

6.6

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
183 reviews
Breeze Airways
8.1
Very good
183 reviews

Overall

8.1

Food

6.8

Comfort

8.2

Boarding

8.3

Entertainment

6.6

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
4,266 reviews
Breeze Airways
8.1
Very good
183 reviews

Overall

8.1

Food

6.8

Comfort

8.2

Boarding

8.3

Entertainment

6.6

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
5.9
Fair
3,286 reviews
Breeze Airways
8.1
Very good
183 reviews

Overall

8.1

Food

6.8

Comfort

8.2

Boarding

8.3

Entertainment

6.6

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 San Diego. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What are the cheapest airlines flying from Islip, New York to San Diego round-trip?

    Cheapflights users have booked flights from Islip, New York to San Diego round-trip from $351. Another airline that can offer you cheap pricing is Breeze Airways.

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

    The cheapest airline one-way is Frontier, with whom users have recently found tickets for as low as $192. However, be on the lookout for offers from Southwest and Breeze Airways, as they are both options that can get you from Islip, New York to San Diego for a low price.

  • Can I find deals for flights from Islip to San Diego that include hotel bookings?

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

  • How can I find direct flights from Islip to San Diego?

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

  • Can I find deals for business class flights from Islip to San Diego?

    Yes. Cheapflights offers flight deals from Islip to San Diego 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 San Diego?

    Currently, August is the cheapest month in which you can book a flight from Islip, New York to San Diego (average of $286). Flying from Islip, New York to San Diego in March is currently the most expensive (average of $366). 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

Traveling to a place near Islip?

Book flights to Islip if you plan to visit one of these locations
El Cajon
Chula Vista
Coronado
National City
Lemon Grove
Imperial Beach
La Mesa
Poway
Alpine
Santee

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Top airline flying from Islip to San Diego

Discover the top airline that operate flights from Islip to San Diego. 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 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$372Average$561FlexibilityNo cancel feeOn-time63%

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