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Cheap flights from Islip to San Diego from $217

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 to San Diego departing on 9/25. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Islip to San Diego

Cheap round-trip flights

Southwest Logo
11:05 am - 10:50 pmISP-SAN
14h 45m1 stop
Southwest Logo
9:45 pm - 12:15 pmSAN-ISP
11h 30m1 stop
$424Southwest
Find Deal
Fri, Nov 7 - Sun, Nov 16
Multiple Airlines Logo
11:25 am - 11:34 pmISP-SAN
15h 09m2 stops
Multiple Airlines Logo
1:12 pm - 6:56 pmSAN-ISP
26h 44m1 stop
$456Multiple Airlines
Find Deal
Tue, Sep 30 - Sat, Oct 4
Southwest Logo
11:05 am - 7:00 pmISP-SAN
10h 55m2 stops
Southwest Logo
9:45 pm - 12:15 pmSAN-ISP
11h 30m1 stop
$458Southwest
Find Deal
Fri, Nov 7 - Sun, Nov 16
Breeze Airways Logo
8:45 pm - 12:36 pmISP-SAN
18h 51m2 stops
Breeze Airways Logo
1:21 pm - 1:45 pmSAN-ISP
21h 24m1 stop
$474Breeze Airways
Find Deal
Sat, Nov 8 - Sun, Nov 16
Breeze Airways Logo
8:45 pm - 12:36 pmISP-SAN
18h 51m2 stops
Breeze Airways Logo
1:12 pm - 6:56 pmSAN-ISP
26h 44m1 stop
$486Breeze Airways
Find Deal
Sat, Nov 8 - Sat, Nov 15
Multiple Airlines Logo
2:47 pm - 10:25 pmISP-SAN
34h 38m2 stops
Multiple Airlines Logo
1:12 pm - 6:56 pmSAN-ISP
26h 44m1 stop
$495Multiple Airlines
Find Deal
Fri, Nov 7 - Sat, Nov 15
Southwest Logo
11:05 am - 7:00 pmISP-SAN
10h 55m2 stops
Southwest Logo
9:50 am - 11:50 pmSAN-ISP
11h 00m2 stops
$607Southwest
Find Deal
Fri, Nov 7 - Sun, Nov 16
Breeze Airways Logo
7:36 pm - 12:27 pmISP-SAN
19h 51m1 stop
Breeze Airways Logo
1:21 pm - 1:45 pmSAN-ISP
21h 24m1 stop
$725Breeze Airways
Find Deal
Thu, Oct 2 - Sun, Oct 5
Multiple Airlines Logo
2:19 pm - 8:19 pmISP-SAN
9h 00m1 stop
Multiple Airlines Logo
6:25 pm - 10:58 amSAN-ISP
13h 33m2 stops
$1,006Multiple Airlines
Find Deal
Thu, Oct 2 - Mon, Oct 6
Breeze Airways Logo
10:38 am - 12:36 pmISP-SAN
52h 58m3 stops
Breeze Airways Logo
1:12 pm - 6:56 pmSAN-ISP
26h 44m1 stop
$1,080Breeze Airways
Find Deal
Tue, Oct 14 - Wed, Oct 29

Southwest flights from Islip to San Diego

Our best Southwest deals on Islip to San Diego flight tickets
Southwest
Nov 7
ISP11:05 amIslip Long Island
14h 45m
1 stop
SAN10:50 pmSan Diego
Nov 16
SAN9:45 pmSan Diego
11h 30m
1 stop
ISP12:15 pmIslip Long Island
$424
Find similar
Southwest
Nov 7
ISP11:05 amIslip Long Island
10h 55m
2 stops
SAN7:00 pmSan Diego
Nov 16
SAN9:45 pmSan Diego
11h 30m
1 stop
ISP12:15 pmIslip Long Island
$458
Find similar
Southwest
Nov 7
ISP11:05 amIslip Long Island
10h 55m
2 stops
SAN7:00 pmSan Diego
Nov 16
SAN9:50 amSan Diego
11h 00m
2 stops
ISP11:50 pmIslip Long Island
$607
Find similar

Breeze Airways flights from Islip to San Diego

Our best Breeze Airways deals on Islip to San Diego flight tickets
Breeze Airways
Nov 8
ISP8:45 pmIslip Long Island
18h 51m
2 stops
SAN12:36 pmSan Diego
Nov 16
SAN1:21 pmSan Diego
21h 24m
1 stop
ISP1:45 pmIslip Long Island
$474
Find similar
Breeze Airways
Nov 8
ISP8:45 pmIslip Long Island
18h 51m
2 stops
SAN12:36 pmSan Diego
Nov 15
SAN1:12 pmSan Diego
26h 44m
1 stop
ISP6:56 pmIslip Long Island
$486
Find similar
Breeze Airways
Oct 2
ISP7:36 pmIslip Long Island
19h 51m
1 stop
SAN12:27 pmSan Diego
Oct 5
SAN1:21 pmSan Diego
21h 24m
1 stop
ISP1:45 pmIslip Long Island
$725
Find similar

momondo 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, momondo users made 832,500 searches. Data last updated September 16, 2025.
Use the filters below to find and compare flights from Islip to San Diego that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

IslipSan Diego

ISP - SAN

ISPSAN

Islip Long Island

Fri 11/7

11:05 am-10:50 pm

1 stop14h 45m

San Diego

Sun 11/16

9:45 pm-12:15 pm

1 stop11h 30m

$424

IslipSan Diego

ISP - SAN

ISPSAN

Islip Long Island

Tue 9/30

11:25 am-11:34 pm

2 stops15h 09m

San Diego

Sat 10/4

1:12 pm-6:56 pm

1 stop26h 44m

$456

IslipSan Diego

ISP - SAN

ISPSAN

Islip Long Island

Fri 11/7

11:05 am-7:00 pm

2 stops10h 55m

San Diego

Sun 11/16

9:45 pm-12:15 pm

1 stop11h 30m

$458

IslipSan Diego

ISP - SAN

ISPSAN

Islip Long Island

Sat 11/8

8:45 pm-12:36 pm

2 stops18h 51m

San Diego

Sun 11/16

1:21 pm-1:45 pm

1 stop21h 24m

$474

IslipSan Diego

ISP - SAN

ISPSAN

Islip Long Island

Sat 11/8

8:45 pm-12:36 pm

2 stops18h 51m

San Diego

Sat 11/15

1:12 pm-6:56 pm

1 stop26h 44m

$486

IslipSan Diego

ISP - SAN

ISPSAN

Islip Long Island

Fri 11/7

2:47 pm-10:25 pm

2 stops34h 38m

San Diego

Sat 11/15

1:12 pm-6:56 pm

1 stop26h 44m

$495

IslipSan Diego

ISP - SAN

ISPSAN

Islip Long Island

Fri 11/7

11:05 am-7:00 pm

2 stops10h 55m

San Diego

Sun 11/16

9:50 am-11:50 pm

2 stops11h 00m

$607

IslipSan Diego

ISP - SAN

ISPSAN

Islip Long Island

Thu 10/2

7:36 pm-12:27 pm

1 stop19h 51m

San Diego

Sun 10/5

1:21 pm-1:45 pm

1 stop21h 24m

$725

IslipSan Diego

ISP - SAN

ISPSAN

Islip Long Island

Thu 10/2

2:19 pm-8:19 pm

1 stop9h 00m

San Diego

Mon 10/6

6:25 pm-10:58 am

2 stops13h 33m

$1,006

IslipSan Diego

ISP - SAN

ISPSAN

Islip Long Island

Tue 10/14

10:38 am-12:36 pm

3 stops52h 58m

San Diego

Wed 10/29

1:12 pm-6:56 pm

1 stop26h 44m

$1,080

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to San Diego from

How to get the cheapest flight ticket from Islip 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 to San Diego is on a Wednesday. Travelers who choose to depart for San Diego on a Wednesday will often find tickets for as low as $371. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $473. 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 $388. Flights at noon are often more expensive with an average ticket price of $437.

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

You could potentially save up to 67% on your flight if you consider stops on a Islip to San Diego flight.

When to book flights from Islip to San Diego

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

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

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

Direct flights

None
There are no direct flights from Islip to San Diego. There are no popular flight routes from Islip 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 9h 00m, 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 to San Diego?

Best airlines flying from Islip to San Diego

Compare and see reviews for airlines that fly from Islip to San Diego with momondo
Airline
Rating
Free Cancellation
Price
SouthwestPriceFrom $350Free CancellationRating
8.0
4,242 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
La Mesa
National City
Poway
Imperial Beach
San Ysidro
Borrego Springs
Lemon Grove
Alpine
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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