$189+ Cheap flights from Islip, NY to San Diego (ISP - SAN)
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 7/30. Fares are subject to change and may not be available on all flights or dates of travel.
Find cheap flights from Islip to San Diego with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Islip to San Diego
Discover tips and strategies to find the most affordable flight options for your journey from Islip (ISP) to San Diego (SAN). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated June 12, 2025.
Round-trip from | $297 (Southwest) |
|---|---|
One-way from | $189 (Southwest) |
Popular in | December |
Cheapest in | October |
Average price | $433 |
Find flight deals from Islip to San Diego
Cheapest flights from Islip to San DiegoExplore the most affordable flight options available from Islip to San Diego. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.
Explore the most affordable flight options available from Islip to San Diego. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.
This Southwest deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Frontier deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Trip.com deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This FlightHub deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated June 12, 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
Tue 11/11
3:55 pm-9:35 pm
1 stop8h 40m
San Diego
Tue 11/18
12:00 pm-10:05 pm
1 stop7h 05m
IslipSan Diego
ISP - SAN
ISPSAN
Islip Long Island
Thu 6/26
2:05 pm-11:59 pm
2 stops12h 54m
San Diego
Thu 7/3
6:51 pm-1:06 pm
2 stops15h 15m
IslipSan Diego
ISP - SAN
ISPSAN
Islip Long Island
Wed 7/9
8:37 pm-9:55 am
2 stops40h 18m
San Diego
Wed 7/16
7:00 pm-11:47 pm
2 stops25h 47m
IslipSan Diego
ISP - SAN
ISPSAN
Islip Long Island
Wed 7/9
2:55 pm-12:03 pm
1 stop24h 08m
San Diego
Wed 7/16
12:48 pm-6:59 pm
1 stop27h 11m
IslipSan Diego
ISP - SAN
ISPSAN
Islip Long Island
Wed 7/30
6:00 am-1:10 pm
2 stops10h 10m
IslipSan Diego
ISP - SAN
ISPSAN
Islip Long Island
Wed 8/27
2:55 pm-12:03 pm
1 stop24h 08m
IslipSan Diego
ISP - SAN
ISPSAN
Islip Long Island
Wed 7/30
2:55 pm-11:06 pm
3 stops35h 11m
Best time to book a flight from Islip to San Diego
Have a flexible travel schedule? Discover the best time to fly to San Diego from Islip with our price prediction graph.
Cheapflights Insights
Everything you need to know about your flight from Islip to San Diego
What is the cheapest month to book a flight from Islip, New York to San Diego?
Currently, August is the cheapest month in which you can book a flight from Islip, New York to San Diego (average of $286). Flying from Islip, New York to San Diego in March is currently the most expensive (average of $366). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from ISP to SAN?
Find hourly flight availability from Islip to San Diego. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 12, 2025.
A simple way to save on the total cost of your ticket is to fly from Islip, New York to San Diego at noon. If you’re flexible enough to do this you can expect to save up to 58% on your trip compared to booking a flight in the morning.
Rainfall in San Diego by month
Plan your trip to San Diego by taking into account the average rainfall totals by month.
In terms of precipitation, rainfall in San Diego ranges from 0.0 - 2.3 inches per month. February is typically the wettest month, when rainfall can reach 2.3 in. July is typically the driest time to visit San Diego when rainfall is around 0.0 in.
Temperature in San Diego by month
Plan your trip to San Diego by taking into account the average temperature totals by month.
If weather is an important factor for your trip to San Diego, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 71.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 57.2 F).
Reviews of airlines servicing San Diego
Get insights into the airlines that provide service to San Diego. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to San Diego. Reviews last updated June 12, 2025.
Entertainment
Overall
Boarding
Food
Crew
Comfort
Reviews
Dena,Dec 2024
LAS - BDL
Entertainment
Overall
Boarding
Food
Crew
Comfort
Reviews
Dena,Dec 2024
LAS - BDL
Entertainment
Overall
Boarding
Food
Crew
Comfort
Reviews
Dena,Dec 2024
LAS - BDL
Entertainment
Overall
Boarding
Food
Crew
Comfort
Reviews
Dena,Dec 2024
LAS - BDL
Related info for your journey
Find useful and relevant information for your journey from Islip to San Diego. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for Islip to San Diego
See prices for flight routes from nearby airports that may be better suited for you.
Top airline flying from Islip to San Diego
Discover the top airline that operate flights from Islip to San Diego. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 12, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$436 | Average$561 | FlexibilityNo cancel fee | On-time63% |