ISP - SAN

$361 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 12/28. 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
$394
Multiple Airlines
Thu 11/13Mon 11/17
ISP - SAN • 1 stop
Cheapest one-way
$361
Multiple Airlines
Sun 12/28
ISP - SAN • 3 stops
Top airlines
Southwest
Cheapest • from $397 (round-trip)
Southwest
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
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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

Thu, Nov 13 - Mon, Nov 17
Multiple Airlines Logo
7:36 pm - 12:27 pmISP-SAN
19h 51m1 stop
Multiple Airlines Logo
6:25 am - 5:42 pmSAN-ISP
32h 17m2 stops
$394Multiple Airlines
Find Deal
Fri, Dec 5 - Mon, Dec 8
Southwest Logo
12:55 pm - 10:25 pmISP-SAN
12h 30m2 stops
Southwest Logo
9:45 pm - 12:15 pmSAN-ISP
11h 30m1 stop
$397Southwest
Find Deal
Fri, Dec 5 - Mon, Dec 8
Southwest Logo
12:55 pm - 9:05 pmISP-SAN
11h 10m2 stops
Southwest Logo
8:40 am - 10:05 pmSAN-ISP
10h 25m2 stops
$423Southwest
Find Deal
Fri, Dec 12 - Sun, Dec 14
Southwest Logo
10:55 am - 5:55 pmISP-SAN
10h 00m1 stop
Southwest Logo
11:10 am - 11:50 pmSAN-ISP
9h 40m1 stop
$430Southwest
Find Deal
Fri, Dec 12 - Sun, Dec 14
Southwest Logo
5:50 am - 12:55 pmISP-SAN
10h 05m2 stops
Southwest Logo
1:35 pm - 11:50 pmSAN-ISP
7h 15m1 stop
$435Southwest
Find Deal
Fri, Dec 12 - Sun, Dec 14
Southwest Logo
5:50 am - 1:45 pmISP-SAN
10h 55m2 stops
Southwest Logo
9:50 am - 11:50 pmSAN-ISP
11h 00m2 stops
$440Southwest
Find Deal
Fri, Dec 12 - Sun, Dec 14
Multiple Airlines Logo
2:25 pm - 11:59 pmISP-SAN
12h 34m2 stops
Multiple Airlines Logo
1:21 pm - 1:45 pmSAN-ISP
21h 24m1 stop
$888Multiple Airlines
Find Deal
Thu, Nov 13 - Mon, Nov 17
Breeze Airways Logo
7:36 pm - 12:27 pmISP-SAN
19h 51m1 stop
Breeze Airways Logo
1:12 pm - 11:15 amSAN-ISP
43h 03m3 stops
$895Breeze Airways
Find Deal
Thu, Nov 13 - Mon, Nov 17
Breeze Airways Logo
2:19 pm - 12:27 pmISP-SAN
25h 08m3 stops
Breeze Airways Logo
1:12 pm - 11:15 amSAN-ISP
43h 03m3 stops
$1,041Breeze Airways
Find Deal
Fri, Dec 5 - Mon, Dec 8
Breeze Airways Logo
8:47 pm - 12:36 pmISP-SAN
42h 49m3 stops
Breeze Airways Logo
1:12 pm - 11:15 amSAN-ISP
43h 03m3 stops
$1,102Breeze Airways
Find Deal
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.

Which airlines provide the cheapest flights from Islip to San Diego?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from Islip to San Diego were found on Southwest ($397) and Breeze Airways ($895).

Which airlines fly non-stop between Islip and San Diego?

Airline and price data is aggregated from results in KAYAK’s search results from the last 2 weeks for round-trip flights from Islip to San Diego.

There is just one airline that flies from Islip to San Diego direct and that is Southwest. The best round-trip deal found from Southwest for the route is $350.

Good to know

Cheapest flight$361
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 $361 for a one-way ticket and $394 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 4243 reviews
8.1Boarding
7.0Food
8.6Crew
7.5Entertainment
8.0Comfort
Airline reviews

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.

8.0 ExcellentGreg, Oct 2025OAK - BUR
Read more Southwest reviews

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.

First time traveling on Southwest since bag fees were implemented. Usual good service. Just more expensive now.

It was a perfect flight in all aspects! Both legs!

Boarding process, crew were good. But the seats were so uncomfortable that was all I could focus on. I literally had to sit forward so that all 3 of us could fit in row. I will try to avoid Southwest in the future for any flights over 60 minutes.

Great flight, 47 passengers on a 180 seat plane. Stewardess was pleasant and cheerful.

Great experience flying Southwest. The crew was really kind and helpful, and very friendly with our toddler.

Plane late from DC to Austin 30 minutes. Crew made up much of the time enroute to San Diego.

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

Information on your arrival and departure airports

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