What is the cheapest airline that flies from Islip Long Island to San Diego?

Southwest is the most popular carrier operating from Islip Long Island to San Diego

What airlines fly to San Diego?

United Airlines, Delta and Alaska Airlines are the top three most popular airlines that fly to San Diego from Islip, New York according to our data. United Airlines is the first choice among our users, with 55% of people opting to fly with this airline when traveling to San Diego. Keep in mind that there are 7 different airlines that fly to San Diego on a routine basis, so you have a few additional options to choose from.

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?

As of October 2026, there is 1 operator available to choose from 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.

$169 Cheap Flights from Islip, New York to San Diego in 2026/27

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

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

5:20 pm - 12:20 amISP Islip Long Island-SAN San Diego

10h 00m1 stop Baltimore/Washington

6:35 am - 5:10 pmSAN San Diego-ISP Islip Long Island

7h 35m1 stop Baltimore/Washington

$423Southwest

Thu, Mar 11 - Sun, Mar 14

5:35 am - 1:25 pmISP Islip Long Island-SAN San Diego

10h 50m1 stop Baltimore/Washington

10:30 pm - 12:30 pmSAN San Diego-ISP Islip Long Island

11h 00m2 stops Orlando Baltimore/Washington

$428Southwest

Thu, Mar 11 - Sun, Mar 14

6:05 am - 1:30 pmISP Islip Long Island-SAN San Diego

10h 25m2 stops Baltimore/Washington Denver Intl

11:20 am - 9:30 pmSAN San Diego-ISP Islip Long Island

7h 10m1 stop Baltimore/Washington

$440Southwest

Fri, Jan 1 - Fri, Jan 8

6:05 am - 1:30 pmISP Islip Long Island-SAN San Diego

10h 25m2 stops Baltimore/Washington Denver Intl

8:05 am - 9:30 pmSAN San Diego-ISP Islip Long Island

10h 25m2 stops Austin Bergstrom Baltimore/Washington

$445Southwest

Fri, Jan 1 - Fri, Jan 8

1:10 pm - 12:20 amISP Islip Long Island-SAN San Diego

14h 10m2 stops Orlando Baltimore/Washington

10:30 pm - 12:30 pmSAN San Diego-ISP Islip Long Island

11h 00m2 stops Orlando Baltimore/Washington

$453Southwest

Thu, Mar 11 - Sun, Mar 14

6:05 am - 10:50 amISP Islip Long Island-SAN San Diego

7h 45m1 stop Baltimore/Washington

11:20 am - 9:30 pmSAN San Diego-ISP Islip Long Island

7h 10m1 stop Baltimore/Washington

$467Southwest

Fri, Jan 1 - Fri, Jan 8

4:05 pm - 9:00 pmISP Islip Long Island-SAN San Diego

7h 55m1 stop Baltimore/Washington

9:55 pm - 11:45 amSAN San Diego-ISP Islip Long Island

10h 50m1 stop Baltimore/Washington

$525Southwest

Wed, Nov 11 - Sun, Nov 15

4:05 pm - 9:00 pmISP Islip Long Island-SAN San Diego

7h 55m1 stop Baltimore/Washington

10:40 pm - 11:45 amSAN San Diego-ISP Islip Long Island

10h 05m2 stops Chicago Midway Baltimore/Washington

$525Southwest

Wed, Nov 11 - Sun, Nov 15

4:40 pm - 9:10 amISP Islip Long Island-SAN San Diego

19h 30m2 stops Orlando Dallas/Fort Worth

1:02 pm - 3:45 pmSAN San Diego-ISP Islip Long Island

23h 43m2 stops Phoenix Sky Harbor Intl Orlando

$894Frontier

Tue, Nov 24 - Sun, Nov 29

4:40 pm - 9:10 amISP Islip Long Island-SAN San Diego

19h 30m2 stops Orlando Dallas/Fort Worth

1:02 pm - 3:45 pmSAN San Diego-ISP Islip Long Island

23h 43m2 stops Phoenix Sky Harbor Intl Orlando

$951Frontier

Tue, Nov 24 - Sun, Nov 29

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Frontier flights from Islip, New York to San Diego

Our best Frontier deals on Islip, New York to San Diego flight tickets

Frontier

Nov 24

ISP4:40 pmIslip Long Island

19h 30m

2 stops

SAN9:10 amSan Diego

Nov 29

SAN1:02 pmSan Diego

23h 43m

2 stops

ISP3:45 pmIslip Long Island

$894

Frontier

Nov 24

ISP4:40 pmIslip Long Island

19h 30m

2 stops

SAN9:10 amSan Diego

Nov 29

SAN1:02 pmSan Diego

23h 43m

2 stops

ISP3:45 pmIslip Long Island

$951

Frontier

Nov 24

ISP4:40 pmIslip Long Island

19h 30m

2 stops

SAN9:10 amSan Diego

Nov 29

SAN1:02 pmSan Diego

23h 43m

2 stops

ISP3:45 pmIslip Long Island

$1,203

Southwest flights from Islip, New York to San Diego

Our best Southwest deals on Islip, New York to San Diego flight tickets

Southwest

Mar 11

ISP5:20 pmIslip Long Island

10h 00m

1 stop

SAN12:20 amSan Diego

Mar 14

SAN6:35 amSan Diego

7h 35m

1 stop

ISP5:10 pmIslip Long Island

$423

Southwest

Mar 11

ISP5:35 amIslip Long Island

10h 50m

1 stop

SAN1:25 pmSan Diego

Mar 14

SAN10:30 pmSan Diego

11h 00m

2 stops

ISP12:30 pmIslip Long Island

$428

Southwest

Jan 1

ISP6:05 amIslip Long Island

10h 25m

2 stops

SAN1:30 pmSan Diego

Jan 8

SAN11:20 amSan Diego

7h 10m

1 stop

ISP9:30 pmIslip Long Island

$440

momondo Fare Finder

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

Cheapest round-trip

IslipSan Diego

ISP Islip Long Island - SAN San Diego

ISPSAN

Islip Long Island

Thu 3/11

5:20 pm-12:20 am

1 stop10h 00m

San Diego

Sun 3/14

6:35 am-5:10 pm

1 stop7h 35m

$423

IslipSan Diego

ISP Islip Long Island - SAN San Diego

ISPSAN

Islip Long Island

Thu 3/11

5:35 am-1:25 pm

1 stop10h 50m

San Diego

Sun 3/14

10:30 pm-12:30 pm

2 stops11h 00m

$428

IslipSan Diego

ISP Islip Long Island - SAN San Diego

ISPSAN

Islip Long Island

Fri 1/1

6:05 am-1:30 pm

2 stops10h 25m

San Diego

Fri 1/8

11:20 am-9:30 pm

1 stop7h 10m

$440

IslipSan Diego

ISP Islip Long Island - SAN San Diego

ISPSAN

Islip Long Island

Fri 1/1

6:05 am-1:30 pm

2 stops10h 25m

San Diego

Fri 1/8

8:05 am-9:30 pm

2 stops10h 25m

$445

IslipSan Diego

ISP Islip Long Island - SAN San Diego

ISPSAN

Islip Long Island

Thu 3/11

1:10 pm-12:20 am

2 stops14h 10m

San Diego

Sun 3/14

10:30 pm-12:30 pm

2 stops11h 00m

$453

Quickest round-trip

IslipSan Diego

ISP Islip Long Island - SAN San Diego

ISPSAN

Islip Long Island

Fri 1/1

6:05 am-10:50 am

1 stop7h 45m

San Diego

Fri 1/8

11:20 am-9:30 pm

1 stop7h 10m

$467

IslipSan Diego

ISP Islip Long Island - SAN San Diego

ISPSAN

Islip Long Island

Wed 11/11

4:05 pm-9:00 pm

1 stop7h 55m

San Diego

Sun 11/15

9:55 pm-11:45 am

1 stop10h 50m

$525

IslipSan Diego

ISP Islip Long Island - SAN San Diego

ISPSAN

Islip Long Island

Wed 11/11

4:05 pm-9:00 pm

1 stop7h 55m

San Diego

Sun 11/15

10:40 pm-11:45 am

2 stops10h 05m

$525

IslipSan Diego

ISP Islip Long Island - SAN San Diego

ISPSAN

Islip Long Island

Tue 11/24

4:40 pm-9:10 am

2 stops19h 30m

San Diego

Sun 11/29

1:02 pm-3:45 pm

2 stops23h 43m

$894

IslipSan Diego

ISP Islip Long Island - SAN San Diego

ISPSAN

Islip Long Island

Tue 11/24

4:40 pm-9:10 am

2 stops19h 30m

San Diego

Sun 11/29

1:02 pm-3:45 pm

2 stops23h 43m

$951

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

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 $409. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $544. 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 at noon when flights can be purchased for as low as $374. Flights in the morning are often more expensive with an average ticket price of $461.

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

You could potentially save up to 26% 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

Best Price Found	$169
Fastest flight time	15h 32m
Direct flights	None

The best one-way flight to San Diego from Islip, New York in the past 72 hours is $169. The best round-trip flight deal from Islip, New York to San Diego found on momondo in the last 72 hours is $423.

The fastest flight from Islip, New York to San Diego takes 15h 32m

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

Frequently asked questions about flying from Islip, New York to San Diego

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 15h 32m, 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?
As of October 2026, there is 1 operator available to choose from 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?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Islip, New York to San Diego is Southwest (100% of total bookings).

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
Southwest	PriceFrom $323	Free Cancellation	Rating 7.9 4,217 reviews		Search Southwest flights

Chula Vista

El Cajon

Coronado

National City

La Mesa

Julian

San Ysidro

Poway

Santee

Imperial Beach

Alpine

Lemon Grove

Borrego Springs

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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Cheap flights from Islip, New York to San Diego from $169

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 11/21. 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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Frontier flights from Islip, New York to San Diego

Our best Frontier deals on Islip, New York to San Diego flight tickets

Southwest flights from Islip, New York to San Diego

Our best Southwest deals on Islip, New York to San Diego flight tickets

momondo Fare Finder

Use the filters below to find and compare flights from Islip, New York to San Diego that are best for you.

See travel insights to San Diego from

How to get the cheapest flight ticket from Islip, New York to San Diego

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

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

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

What is the cheapest airline that flies from Islip Long Island to San Diego?

What airlines fly to San Diego?

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

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

Best Price Found

Fastest flight time

Direct flights

Frequently asked questions about flying 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

Traveling to a place near San Diego?

Why use momondo?

An easier way to manage your San Diego trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to the United States

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List of cabin classes available on flights landing in San Diego. Availability may vary depending on flight origin and airline.

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