ISP - SAN

$157 Find Cheap Flights from Islip to San Diego

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Islip to San Diego departing on 3/15. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to San Diego

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Islip to San Diego, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Islip to San Diego, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$387
Southwest
Tue 2/24Tue 3/3
ISP - SAN • 1 stop
Cheapest one-way
$157
Frontier
Sun 3/15
ISP - SAN • 2 stops
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We hope you love your trip to San Diego!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Islip to San Diego (ISP-SAN)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Islip to San Diego that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Islip to San Diego

Tue, Feb 24 - Tue, Mar 3
Southwest Logo
12:40 pm - 9:00 pm
ISP
-
SAN
11h 20m
1 stop
Southwest Logo
12:00 pm - 9:55 pm
SAN
-
ISP
6h 55m
1 stop
$387Southwest
Tue, Feb 24 - Tue, Mar 3
Southwest Logo
3:45 pm - 9:00 pm
ISP
-
SAN
8h 15m
1 stop
Southwest Logo
9:40 am - 9:55 pm
SAN
-
ISP
9h 15m
2 stops
$392Southwest
Mon, Feb 23 - Mon, Mar 2
Southwest Logo
4:05 pm - 9:30 pm
ISP
-
SAN
8h 25m
1 stop
Southwest Logo
6:50 am - 4:25 pm
SAN
-
ISP
6h 35m
1 stop
$393Southwest
Tue, Feb 24 - Tue, Mar 3
Southwest Logo
3:45 pm - 10:20 pm
ISP
-
SAN
9h 35m
2 stops
Southwest Logo
9:40 am - 9:55 pm
SAN
-
ISP
9h 15m
2 stops
$397Southwest
Mon, Feb 23 - Mon, Mar 2
Southwest Logo
4:05 pm - 9:30 pm
ISP
-
SAN
8h 25m
1 stop
Southwest Logo
7:05 am - 10:20 pm
SAN
-
ISP
12h 15m
2 stops
$398Southwest
Mon, Feb 23 - Mon, Mar 2
Southwest Logo
11:50 am - 9:00 pm
ISP
-
SAN
12h 10m
2 stops
Southwest Logo
7:05 am - 10:20 pm
SAN
-
ISP
12h 15m
2 stops
$403Southwest
Thu, Apr 2 - Thu, Apr 9
Southwest Logo
5:55 pm - 11:25 pm
ISP
-
SAN
8h 30m
1 stop
Southwest Logo
1:05 pm - 11:30 pm
SAN
-
ISP
7h 25m
1 stop
$558Southwest
Tue, Feb 10 - Sat, Feb 14
Southwest Logo
12:40 pm - 9:00 pm
ISP
-
SAN
11h 20m
1 stop
Southwest Logo
7:05 am - 6:20 pm
SAN
-
ISP
8h 15m
1 stop
$567Southwest
Tue, Feb 10 - Sat, Feb 14
Southwest Logo
12:40 pm - 8:50 pm
ISP
-
SAN
11h 10m
2 stops
Southwest Logo
7:05 am - 6:20 pm
SAN
-
ISP
8h 15m
1 stop
$572Southwest
Tue, Feb 10 - Sat, Feb 14
Southwest Logo
6:00 am - 2:45 pm
ISP
-
SAN
11h 45m
2 stops
Southwest Logo
9:40 am - 10:45 pm
SAN
-
ISP
10h 05m
2 stops
$577Southwest
Booking Insights

KAYAK's insights & trends for Islip to San Diego flights

Get data-powered insights and trends into flights from Islip to San Diego to help you find the cheapest flights, the best time to fly and much more.

What is the most popular layover airport when flying from Islip to San Diego?

Percentage of 1-stop round-trip flights from Islip to San Diego chosen by KAYAK users via each layover airport in the last 12 months (only includes trips with the same layover airport on both legs).

Baltimore (BWI) is the top choice – 92% of KAYAK users who clicked on 1-stop flights from Islip to San Diego picked an itinerary connecting there.

What is the cheapest layover airport when flying from Islip to San Diego?

Average round-trip price for 1-stop flights from Islip to San Diego clicked by KAYAK users in the last 12 months (only includes trips with the same layover airport on both legs).

Flights via Boston (BOS) offer the most affordable fares, with an average round-trip price of $426.

Which layover airport offers the shortest total travel time from Islip to San Diego?

Shortest average total travel time for 1-stop one-way flights from Islip to San Diego via different layover airports, based on KAYAK user data from the last 12 months.

Consider flying via Baltimore (BWI) for the shortest journey. The average one-way travel time for flights connecting there is 8h 34m.

Which layover airport has the quickest connection when flying from Islip to San Diego?

Average layover duration at different layover airports for 1-stop one-way flights from Islip to San Diego, based on KAYAK user data from the last 12 months.

If you prefer a quick connection, Boston (BOS) often has the shortest layovers from Islip to San Diego, with an average of 1h 29m.

Find deals

Good to know

Cheapest flight$157
Most popular time to fly with an average 15% increase in price.
Flight from Islip to San Diego

When to book flights from Islip to San Diego

Are your dates flexible? Find out the best times to travel from Islip to San Diego based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Islip to San Diego

  • What is the cheapest flight from Islip to San Diego?

    In the last 3 days, the lowest price for a flight from Islip to San Diego was $157 for a one-way ticket and $387 for a round-trip.

  • Do I need a passport to fly between Islip and San Diego?

    A passport is not required to fly from Islip to San Diego.

  • Which airports will I be using when flying from Islip to San Diego?

    Islip airport is called Islip Long Island and the only airport in San Diego is San Diego.

  • Which aircraft models fly most regularly from Islip to San Diego?

    We unfortunately don’t have that data for this specific route.

  • How does KAYAK find such low prices on flights from Islip to San Diego?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Islip to San Diego.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Islip to San Diego?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Diego from Islip is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Islip to San Diego?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to San Diego with an airline and back to Islip with another airline. Booking your flights between Islip and SAN can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Islip to San Diego?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to San Diego from Islip up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Islip to San Diego

 
See real verified KAYAK customer reviews for airlines flying from Islip to San Diego. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Islip to San Diego? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
SouthwestOverall score based on 4268 reviews
7.0Food
7.5Entertainment
8.1Boarding
8.0Comfort
8.6Crew
Airline reviews

3 hour delay. Had to change plans and was still delayed.

2.0 MediocreAnonymous, Jan 2026
SFO - SAN
Read more Southwest reviews

3 hour delay. Had to change plans and was still delayed.

The flight crew was extremely rude and especially not helpful when our flight was delayed.

The boarding and seat assignment system no longer works for me, but I know it is being replaced. Otherwise, I am good with the overall experience.

The lead steward kept singing about "San Francisco" and hotel California---more annoying than humorous....needs work. Flight was smooth and on time.

Still a fan of open seating. Flight was on schedule and arrived on time. The 737 MAX is very comfortable.

San Diego airport is brand new, spacious, airy and very smooth checkin at SW baggage drop.

Ever since Southwest starting charging for bags, passengers don't want to pay to check their bags, so the gate agents have to beg people to check their roller bags now because there's "not enough space". This was a terrible business move by Southwest.

Delays delays delays. Late taking off, late landing, wait for a gate, etc.

Connecting flight is on time and boarding was a breeze!

Very smooth checking in our luggage with a super pleasant SW agent. I enjoyed a fun entertaining movie.

Everything you need to know for your flight from Islip to San Diego

Information on your arrival and departure airports

Islip (ISP)
San Diego (SAN)