$105+ 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 4/21. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — SFO
Apr 16 — Apr 231
1 adult, Economy
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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 April 11, 2025.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $228 (Booking.com) |
One-way from | $105 (Frontier) |
Popular in | June |
Cheapest in | February |
Average price | $422 |
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 April 11, 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 April 11, 2025.
This Booking.com deal was found by Cheapflights users on 4/10. 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.
Thu 5/86:48 pmISP - SFO
1 stop21h 27mFrontier
Thu 5/159:59 pmSFO - ISP
1 stop9h 13mFrontier
Deal found 4/10![Frontier logo]()
$228
This Southwest deal was found by Cheapflights users on 4/10. 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.
Thu 5/85:40 amISP - SFO
2 stops11h 30mSouthwest
Thu 5/155:25 amSFO - ISP
2 stops14h 05mSouthwest
Deal found 4/10![Southwest logo]()
$494
This Gotogate deal was found by Cheapflights users on 4/10. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/131:55 pmISP - SFO
3 stops24h 44mMultiple Airlines
Thu 5/228:45 pmSFO - ISP
1 stop19h 49mMultiple Airlines
Deal found 4/10![Multiple Airlines logo]()
$553
This KAYAK deal was found by Cheapflights users on 4/10. 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.
Fri 5/2310:44 amISP - SFO
1 stop27h 55mBreeze Airways
Tue 5/2712:33 pmSFO - ISP
2 stops22h 12mBreeze Airways
Deal found 4/10![Breeze Airways logo]()
$809
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 April 11, 2025.
Use the filters below to find and compare flights from Islip to San Francisco that are best for you.
Fly from
Islip
Fly to
San Francisco
Route
Depart
Return
Price
IslipSan Francisco
ISP - SFO
ISPSFO
Islip Long Island
Thu 5/8
6:48 pm-1:15 pm
1 stop21h 27m
San Francisco
Thu 5/15
9:59 pm-10:12 am
1 stop9h 13m
$228
IslipSan Francisco
ISP - SFO
ISPSFO
Islip Long Island
Thu 5/8
5:40 am-2:10 pm
2 stops11h 30m
San Francisco
Thu 5/15
5:25 am-10:30 pm
2 stops14h 05m
$494
IslipSan Francisco
ISP - SFO
ISPSFO
Islip Long Island
Tue 5/13
1:55 pm-11:39 am
3 stops24h 44m
San Francisco
Thu 5/22
8:45 pm-7:34 pm
1 stop19h 49m
$553
IslipSan Francisco
ISP - SFO
ISPSFO
Islip Long Island
Fri 5/23
10:44 am-11:39 am
1 stop27h 55m
San Francisco
Tue 5/27
12:33 pm-1:45 pm
2 stops22h 12m
$809
IslipSan Francisco
ISP - SFO
ISPSFO
Islip Long Island
Mon 4/21
9:10 am-9:26 pm
1 stop15h 16m
$105
IslipSan Francisco
ISP - SFO
ISPSFO
Islip Long Island
Sun 5/25
6:00 am-12:44 pm
1 stop9h 44m
$194
IslipSan Francisco
ISP - SFO
ISPSFO
Islip Long Island
Mon 8/18
10:36 am-11:48 am
2 stops28h 12m
$373
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 April.
| 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.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
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 $393). 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 April 11, 2025.
See what other customers who have flown with Breeze Airways, Southwest and JetBlue from Islip to San Francisco have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Boarding
8.3
Food
6.7
Entertainment
6.6
Overall
8.1
Comfort
8.2
Crew
8.8
Reviews
1 / 11
10.0
ExcellentDena,Dec 2024
LAS - BDL
Boarding
8.3
Food
6.7
Entertainment
6.6
Overall
8.1
Comfort
8.2
Crew
8.8
Reviews
1 / 11
10.0
ExcellentDena,Dec 2024
LAS - BDL
Boarding
8.3
Food
6.7
Entertainment
6.6
Overall
8.1
Comfort
8.2
Crew
8.8
Reviews
1 / 11
10.0
ExcellentDena,Dec 2024
LAS - BDL
Boarding
8.3
Food
6.7
Entertainment
6.6
Overall
8.1
Comfort
8.2
Crew
8.8
Reviews
1 / 11
10.0
ExcellentDena,Dec 2024
LAS - BDL
Boarding
8.3
Food
6.7
Entertainment
6.6
Overall
8.1
Comfort
8.2
Crew
8.8
Reviews
1 / 11
10.0
ExcellentDena,Dec 2024
LAS - BDL
Related info for your journey
Find useful and relevant information for your journey from Islip to San Francisco. 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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