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Cheap flights from Islip, New York to San Diego from $109

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Islip, New York to San Diego departing on 3/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Islip, New York to San Diego

Cheap round-trip flights

Enter your travel dates to find the best prices.
Southwest Logo
4:40 pm - 10:35 pm
ISP
-
SAN
8h 55m
1 stop
Southwest Logo
8:35 am - 9:25 pm
SAN
-
ISP
9h 50m
1 stop
$393Southwest
Sat, Apr 11 - Sat, Apr 18
Southwest Logo
9:20 am - 6:45 pm
ISP
-
SAN
12h 25m
2 stops
Southwest Logo
10:30 pm - 11:10 am
SAN
-
ISP
9h 40m
1 stop
$398Southwest
Sat, Apr 11 - Sat, Apr 18
Southwest Logo
9:20 am - 6:45 pm
ISP
-
SAN
12h 25m
2 stops
Southwest Logo
9:30 am - 11:20 pm
SAN
-
ISP
10h 50m
2 stops
$403Southwest
Sat, Apr 11 - Sat, Apr 18
Southwest Logo
6:00 am - 12:35 pm
ISP
-
SAN
9h 35m
1 stop
Southwest Logo
11:30 am - 11:55 pm
SAN
-
ISP
9h 25m
1 stop
$483Southwest
Thu, Mar 5 - Thu, Mar 12
Southwest Logo
6:00 am - 1:05 pm
ISP
-
SAN
10h 05m
2 stops
Southwest Logo
11:30 am - 11:55 pm
SAN
-
ISP
9h 25m
1 stop
$488Southwest
Thu, Mar 5 - Thu, Mar 12
Southwest Logo
2:00 pm - 10:20 pm
ISP
-
SAN
11h 20m
2 stops
Southwest Logo
10:40 pm - 11:40 am
SAN
-
ISP
10h 00m
2 stops
$515Southwest
Thu, Mar 5 - Thu, Mar 12
Southwest Logo
11:55 am - 8:10 pm
ISP
-
SAN
11h 15m
1 stop
Southwest Logo
12:00 pm - 9:55 pm
SAN
-
ISP
6h 55m
1 stop
$567Southwest
Fri, Feb 20 - Tue, Feb 24
Southwest Logo
11:55 am - 8:10 pm
ISP
-
SAN
11h 15m
1 stop
Southwest Logo
7:05 am - 10:20 pm
SAN
-
ISP
12h 15m
2 stops
$572Southwest
Fri, Feb 20 - Mon, Feb 23
Southwest Logo
1:10 pm - 9:10 pm
ISP
-
SAN
11h 00m
2 stops
Southwest Logo
7:05 am - 10:20 pm
SAN
-
ISP
12h 15m
2 stops
$577Southwest
Fri, Feb 20 - Mon, Feb 23

Southwest flights from Islip, New York to San Diego

Our best Southwest deals on Islip, New York to San Diego flight tickets
Southwest
Apr 11
ISP4:40 pmIslip Long Island
8h 55m
1 stop
SAN10:35 pmSan Diego
Apr 18
SAN8:35 amSan Diego
9h 50m
1 stop
ISP9:25 pmIslip Long Island
$393
Southwest
Apr 11
ISP9:20 amIslip Long Island
12h 25m
2 stops
SAN6:45 pmSan Diego
Apr 18
SAN8:35 amSan Diego
9h 50m
1 stop
ISP9:25 pmIslip Long Island
$398
Southwest
Apr 11
ISP9:20 amIslip Long Island
12h 25m
2 stops
SAN6:45 pmSan Diego
Apr 18
SAN9:30 amSan Diego
10h 50m
2 stops
ISP11:20 pmIslip Long Island
$403

momondo Fare Finder

 
Customize your flight search to find flights from Islip, New York 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, momondo users made 832,500 searches. Data last updated February 8, 2026.
Use the filters below to find and compare flights from Islip, New York to San Diego that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

IslipSan Diego

ISP - SAN

ISPSAN

Islip Long Island

Sat 4/11

4:40 pm-10:35 pm

1 stop8h 55m

San Diego

Sat 4/18

8:35 am-9:25 pm

1 stop9h 50m

$393

IslipSan Diego

ISP - SAN

ISPSAN

Islip Long Island

Sat 4/11

9:20 am-6:45 pm

2 stops12h 25m

San Diego

Sat 4/18

10:30 pm-11:10 am

1 stop9h 40m

$398

IslipSan Diego

ISP - SAN

ISPSAN

Islip Long Island

Sat 4/11

9:20 am-6:45 pm

2 stops12h 25m

San Diego

Sat 4/18

9:30 am-11:20 pm

2 stops10h 50m

$403

IslipSan Diego

ISP - SAN

ISPSAN

Islip Long Island

Thu 3/5

6:00 am-12:35 pm

1 stop9h 35m

San Diego

Thu 3/12

11:30 am-11:55 pm

1 stop9h 25m

$483

IslipSan Diego

ISP - SAN

ISPSAN

Islip Long Island

Thu 3/5

6:00 am-1:05 pm

2 stops10h 05m

San Diego

Thu 3/12

11:30 am-11:55 pm

1 stop9h 25m

$488

IslipSan Diego

ISP - SAN

ISPSAN

Islip Long Island

Thu 3/5

2:00 pm-10:20 pm

2 stops11h 20m

San Diego

Thu 3/12

10:40 pm-11:40 am

2 stops10h 00m

$515

IslipSan Diego

ISP - SAN

ISPSAN

Islip Long Island

Fri 2/20

11:55 am-8:10 pm

1 stop11h 15m

San Diego

Tue 2/24

12:00 pm-9:55 pm

1 stop6h 55m

$567

IslipSan Diego

ISP - SAN

ISPSAN

Islip Long Island

Fri 2/20

11:55 am-8:10 pm

1 stop11h 15m

San Diego

Mon 2/23

7:05 am-10:20 pm

2 stops12h 15m

$572

IslipSan Diego

ISP - SAN

ISPSAN

Islip Long Island

Fri 2/20

1:10 pm-9:10 pm

2 stops11h 00m

San Diego

Mon 2/23

7:05 am-10:20 pm

2 stops12h 15m

$577

IslipSan Diego

ISP - SAN

ISPSAN

Islip Long Island

Mon 3/9

10:58 am-12:08 am

2 stops40h 10m

$109

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 15 resultsSorted by cheapest first
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How to get the cheapest flight ticket from Islip, New York to San Diego

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

What is the cheapest day to depart on your flight to San Diego?

The cheapest day to depart from Islip, New York to San Diego is on a Tuesday. Travelers who choose to depart for San Diego on a Tuesday will often find tickets for as low as $369. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $477. These prices are subject to change though, so be sure to set up a Price Alert for flights to San Diego.

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

The cheapest time of day to fly to San Diego is in the evening when flights can be purchased for as low as $375. Flights at noon are often more expensive with an average ticket price of $437.

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

You could potentially save up to 7% on your flight if you consider stops on a Islip, New York to San Diego flight.

When to book flights from Islip, New York to San Diego

Are you open to changing your travel dates? Check out the ideal times to fly from Islip, New York to San Diego according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Islip, New York to San Diego (ISP to SAN) flight deals and tips

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

Fastest flight time

8h 55m

Direct flights

None
The fastest flight from Islip, New York to San Diego takes 8h 55m
There are no direct flights from Islip, New York to San Diego. There are no popular flight routes from Islip, New York to San Diego.
Search flight deals

  • How far is Islip Long Island to San Diego by plane?

    Islip Long Island and San Diego are 2467.5 mi apart from one another. Flights usually cover this in 8h 55m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from Islip Long Island Airport to San Diego Airport?

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

  • How many operators does momondo search for flights from Islip Long Island Airport to San Diego Airport?

  • How old do you have to be to fly from Islip Long Island Airport to San Diego Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Islip Long Island Airport to San Diego Airport.

  • What documentation or ID do you need to fly to San Diego Airport?

    The required travel and health documents for your San Diego Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at San Diego Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular airline from Islip, New York to San Diego?

Best airlines flying from Islip, New York to San Diego

Compare and see reviews for airlines that fly from Islip, New York to San Diego with momondo
Airline
Rating
Free Cancellation
Price
SouthwestPriceFrom $350Free CancellationRating
8.0
4,282 reviews
Search Southwest flights

Traveling to a place near San Diego?

Book flights to San Diego if you plan to visit one of these locations
Coronado
Chula Vista
El Cajon
Julian
Poway
National City
Imperial Beach
San Ysidro
Borrego Springs
La Mesa
Alpine
Lemon Grove
Santee

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to San Diego from Islip.

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

Yes. All flights to San Diego from Islip on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Islip to San Diego?

momondo provides multiple filters to help you find the best flight to San Diego from Islip. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Yes. momondo can track prices for Islip to San Diego 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.

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