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Islip

$204+ Cheap flights from San Diego to Islip (SAN - ISP)

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 10/5. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — ISP
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap flight deals from San Diego to Islip

Discover tips and strategies to find the most affordable flight options for your journey from San Diego (SAN) to Islip (ISP). 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 September 11, 2025.

Round-trip from

$283
(Frontier)

One-way from

$204
(Kiwi.com)

Popular in

December

Cheapest in

January

Average price

$307
From San Diego to Islip Long Island
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One-way flight from San Diego to Islip Long Island
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Highest demand for flights based on searches. 2% potential increase in price ($8 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($8 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from San Diego to Islip

Cheapest flights from San Diego to Islip
Explore the most affordable flight options available from San Diego to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

This Frontier deal was found by Cheapflights users on 9/10. 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.
Fri 11/75:57 pmSAN - ISP
2 stops13h 58mFrontier
Mon 11/109:54 amISP - SAN
2 stops15h 20mFrontier
Deal found 9/10$283
This KAYAK deal was found by Cheapflights users on 9/10. 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.
Thu 12/41:21 pmSAN - ISP
1 stop21h 24mBreeze Airways
Sun 12/710:38 amISP - SAN
1 stop28h 49mBreeze Airways
Deal found 9/10$669
This Kiwi.com deal was found by Cheapflights users on 9/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/251:21 pmSAN - ISP
1 stop21h 24mMultiple Airlines
Mon 9/295:05 pmISP - SAN
2 stops33h 29mMultiple Airlines
Deal found 9/10$684
This Gotogate deal was found by Cheapflights users on 9/10. 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.
Thu 9/251:21 pmSAN - ISP
1 stop21h 24mBreeze Airways
Mon 9/292:25 pmISP - SAN
1 stop25h 11mBreeze Airways
Deal found 9/10$824
This Gotogate deal was found by Cheapflights users on 9/10. 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.
Thu 9/111:21 pmSAN - ISP
1 stop21h 24mBreeze Airways
Thu 9/187:36 pmISP - SAN
1 stop19h 51mBreeze Airways
Deal found 9/10$879
This Cheapflightsfares deal was found by Cheapflights users on 9/9. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/126:30 pmSAN - ISP
2 stops13h 28mMultiple Airlines
Sat 1/32:19 pmISP - SAN
1 stop8h 59mMultiple Airlines
Deal found 9/9$949
This Southwest deal was found by Cheapflights users on 9/10. 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 9/119:10 pmSAN - ISP
1 stop11h 50mSouthwest
Thu 9/183:05 pmISP - SAN
2 stops10h 30mSouthwest
Deal found 9/10$958
This Cheapflightsfares deal was found by Cheapflights users on 9/9. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/246:59 pmSAN - ISP
2 stops12h 59mMultiple Airlines
Sat 1/32:19 pmISP - SAN
1 stop8h 59mMultiple Airlines
Deal found 9/9$997
This Cheapflightsfares deal was found by Cheapflights users on 9/10. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/306:59 pmSAN - ISP
2 stops12h 59mMultiple Airlines
Tue 1/132:19 pmISP - SAN
2 stops12h 40mMultiple Airlines
Deal found 9/10$1,042
This Cheapflightsfares deal was found by Cheapflights users on 9/9. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/306:59 pmSAN - ISP
2 stops12h 59mMultiple Airlines
Sat 1/32:19 pmISP - SAN
1 stop8h 59mMultiple Airlines
Deal found 9/9$1,087
This Cheapflightsfares deal was found by Cheapflights users on 9/9. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/146:30 pmSAN - ISP
2 stops13h 28mMultiple Airlines
Fri 12/192:19 pmISP - SAN
1 stop8h 59mMultiple Airlines
Deal found 9/9$1,148

Cheapflights Fare Finder

 
Customize your flight search to find flights from San Diego to Islip 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 September 11, 2025.
Use the filters below to find and compare flights from San Diego to Islip that are best for you.

Fly from

San Diego

Fly to

Islip

Route

Depart

Return

Price

San DiegoIslip

SAN - ISP

SANISP

San Diego

Fri 11/7

5:57 pm-10:55 am

2 stops13h 58m

Islip Long Island

Mon 11/10

9:54 am-10:14 pm

2 stops15h 20m

$283

San DiegoIslip

SAN - ISP

SANISP

San Diego

Thu 12/4

1:21 pm-1:45 pm

1 stop21h 24m

Islip Long Island

Sun 12/7

10:38 am-12:27 pm

1 stop28h 49m

$669

San DiegoIslip

SAN - ISP

SANISP

San Diego

Thu 9/25

1:21 pm-1:45 pm

1 stop21h 24m

Islip Long Island

Mon 9/29

5:05 pm-11:34 pm

2 stops33h 29m

$684

San DiegoIslip

SAN - ISP

SANISP

San Diego

Thu 9/25

1:21 pm-1:45 pm

1 stop21h 24m

Islip Long Island

Mon 9/29

2:25 pm-12:36 pm

1 stop25h 11m

$824

San DiegoIslip

SAN - ISP

SANISP

San Diego

Fri 12/12

6:30 pm-10:58 am

2 stops13h 28m

Islip Long Island

Sat 1/3

2:19 pm-8:18 pm

1 stop8h 59m

$949

San DiegoIslip

SAN - ISP

SANISP

San Diego

Wed 12/24

6:59 pm-10:58 am

2 stops12h 59m

Islip Long Island

Sat 1/3

2:19 pm-8:18 pm

1 stop8h 59m

$997

San DiegoIslip

SAN - ISP

SANISP

San Diego

Tue 12/30

6:59 pm-10:58 am

2 stops12h 59m

Islip Long Island

Tue 1/13

2:19 pm-11:59 pm

2 stops12h 40m

$1,042

San DiegoIslip

SAN - ISP

SANISP

San Diego

Tue 12/30

6:59 pm-10:58 am

2 stops12h 59m

Islip Long Island

Sat 1/3

2:19 pm-8:18 pm

1 stop8h 59m

$1,087

San DiegoIslip

SAN - ISP

SANISP

San Diego

Sun 12/14

6:30 pm-10:58 am

2 stops13h 28m

Islip Long Island

Fri 12/19

2:19 pm-8:18 pm

1 stop8h 59m

$1,148

San DiegoIslip

SAN - ISP

SANISP

San Diego

Sun 10/5

9:10 pm-11:50 am

1 stop11h 40m

$265

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Showing 1-10 of 16 results
1
2

Best time to book a flight from San Diego to Islip

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

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

Currently, January is the cheapest month in which you can book a flight from San Diego to Islip (average of $108). Flying from San Diego to Islip in November is currently the most expensive (average of $213). 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.

Reviews of airlines servicing Islip

Get insights into the airlines that provide service to Islip. 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 Islip. Reviews last updated September 11, 2025.
See what other customers who have flown with Southwest from San Diego to Islip 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
4,248 reviews

Entertainment

7.5

Crew

8.6

Boarding

8.1

Comfort

8.0

Overall

8.0

Food

7.0

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
4,248 reviews
Southwest
8.0
Very good
4,248 reviews

Entertainment

7.5

Crew

8.6

Boarding

8.1

Comfort

8.0

Overall

8.0

Food

7.0

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.

Related info for your journey

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

  • How long is the flight from San Diego to Islip?

    Departing from San Diego to Islip will take you 13h 58m. The distance from San Diego to Islip is about 2475 mi. This flight may include one or multiple stops.

  • What is the cheapest airline to fly from San Diego to Islip round-trip?

    According to our current data, Southwest ($385), offers the cheapest pricing from San Diego to Islip.

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

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

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

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

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

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

    Currently, January is the cheapest month in which you can book a flight from San Diego to Islip (average of $108). Flying from San Diego to Islip in November is currently the most expensive (average of $213). 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
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Top airline flying from San Diego to Islip

Discover the top airline that operate flights from San Diego to Islip. 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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$385Average$476FlexibilityNo cancel feeOn-time63%

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