$140+ Cheap flights from Islip, NY to San Francisco (ISP - SFO)
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 5/25. Fares are subject to change and may not be available on all flights or dates of travel.
Find cheap flights from Islip to San Francisco 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 Francisco
Discover tips and strategies to find the most affordable flight options for your journey from Islip (ISP) to San Francisco (SFO). 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 March 25, 2025.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $308 (Booking.com) |
One-way from | $140 (JetBlue) |
Popular in | June |
Cheapest in | February |
Average price | $387 |
Find flight deals from Islip to San Francisco
Cheapest flights from Islip to San FranciscoExplore the most affordable flight options available from Islip to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 25, 2025.
Explore the most affordable flight options available from Islip to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 25, 2025.
This Booking.com deal was found by Cheapflights users on 3/24. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Southwest deal was found by Cheapflights users on 3/24. 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 JetBlue deal was found by Cheapflights users on 3/24. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This KAYAK deal was found by Cheapflights users on 3/24. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Mytrip deal was found by Cheapflights users on 3/24. 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 Mytrip 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 Francisco 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 March 25, 2025.
Use the filters below to find and compare flights from Islip to San Francisco that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
IslipSan Francisco
ISP - SFO
ISPSFO
Islip Long Island
Tue 4/8
9:04 pm-8:47 pm
1 stop26h 43m
San Francisco
Sat 4/12
10:30 pm-8:10 am
1 stop30h 40m
IslipSan Francisco
ISP - SFO
ISPSFO
Islip Long Island
Fri 4/11
10:30 am-7:10 pm
2 stops11h 40m
San Francisco
Tue 4/15
6:35 pm-9:10 am
2 stops11h 35m
IslipSan Francisco
ISP - SFO
ISPSFO
Islip Long Island
Fri 5/2
6:00 am-12:02 pm
1 stop9h 02m
San Francisco
Mon 5/5
8:00 am-9:28 pm
1 stop10h 28m
IslipSan Francisco
ISP - SFO
ISPSFO
Islip Long Island
Thu 6/26
7:39 pm-11:44 am
3 stops19h 05m
San Francisco
Tue 7/1
12:33 pm-1:32 pm
2 stops21h 59m
IslipSan Francisco
ISP - SFO
ISPSFO
Islip Long Island
Sun 6/22
7:39 pm-11:44 am
3 stops19h 05m
San Francisco
Sun 6/29
9:05 am-3:15 pm
3 stops27h 10m
IslipSan Francisco
ISP - SFO
ISPSFO
Islip Long Island
Sun 5/25
6:00 am-12:44 pm
1 stop9h 44m
IslipSan Francisco
ISP - SFO
ISPSFO
Islip Long Island
Mon 9/8
3:05 pm-8:10 pm
1 stop8h 05m
IslipSan Francisco
ISP - SFO
ISPSFO
Islip Long Island
Sat 4/5
9:00 am-9:30 pm
1 stop15h 30m
Compare providers for flights from Islip to San Francisco
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Islip to San Francisco in March.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Islip, New York-San Francisco flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Islip, New York-San Francisco flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Islip, New York-San Francisco flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Islip, New York-San Francisco flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Islip, New York-San Francisco flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from Islip to San Francisco
Have a flexible travel schedule? Discover the best time to fly to San Francisco from Islip with our price prediction graph.
Cheapflights Insights
Everything you need to know about your flight from Islip to San Francisco
What is the cheapest month to book a flight from Islip, New York to San Francisco?
Currently, January is the cheapest month in which you can book a flight from Islip, New York to San Francisco (average of $276). Flying from Islip, New York to San Francisco in June is currently the most expensive (average of $398). 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.
Rainfall in San Francisco by month
Plan your trip to San Francisco by taking into account the average rainfall totals by month.
In terms of precipitation, rainfall in San Francisco ranges from 0.0 - 4.4 inches per month. January is typically the wettest month, when rainfall can reach 4.4 in. July is typically the driest time to visit San Francisco when rainfall is around 0.0 in.
Temperature in San Francisco by month
Plan your trip to San Francisco by taking into account the average temperature totals by month.
If weather is an important factor for your trip to San Francisco, use this chart to help with planning. For those seeking warmer temperatures, September is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 51.8 F).
Reviews of airlines servicing San Francisco
Get insights into the airlines that provide service to San Francisco. 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 Francisco. Reviews last updated March 25, 2025.
Boarding
Comfort
Entertainment
Overall
Food
Crew
Reviews
Merlyn,Feb 2025
LAX - SMF
Boarding
Comfort
Entertainment
Overall
Food
Crew
Reviews
Merlyn,Feb 2025
LAX - SMF
Boarding
Comfort
Entertainment
Overall
Food
Crew
Reviews
Merlyn,Feb 2025
LAX - SMF
Boarding
Comfort
Entertainment
Overall
Food
Crew
Reviews
Merlyn,Feb 2025
LAX - SMF
Boarding
Comfort
Entertainment
Overall
Food
Crew
Reviews
Merlyn,Feb 2025
LAX - SMF