Skip to main content
Beginning of main content

ISP (Islip) to SFO (San Francisco) Flights $313.6

Search over 321,000 hotels worldwide and 400 airlines worldwide.
Secure incredible value with Expedia's Price Guarantee.
No Expedia cancellation fee to change or cancel almost any hotel reservation.

Cheap ISP to SFO Flights

Prices found within past 7 days. Prices and availability subject to change. Additional terms may apply.

Interesting Facts About Flights from Islip to San Francisco (ISP to SFO)

Question : Do prices fluctuate more for this route than others?
Answer : Prices for this trip tend to fluctuate more than other flights in the United States. They can range from $344 to $1,015. However, the sooner you book, the more you'll be able to save.

Question : Can you cut down on flight costs by changing the day of the week you travel to San Francisco?
Answer : For the month of October, Friday is your lowest-cost day to fly. Having flexibility in your travel plans means you can save more, so be sure to plan ahead when possible.

Question : In the next four weeks, what day should you book your trip?
Answer : As of Sep 18th, the cheapest day to fly from Ronkonkoma to San Francisco is Sep 30th. Tickets are currently being sold for $344, which is 36% below the average price for this route.

Question : How long do most people stay in San Francisco?
Answer : Of course you're not most people, but if you were, you'd stay roughly four days.

Question : Is there an alternative to Long Island MacArthur Airport (ISP) for getting you to San Francisco?
Answer : Departing from Long Island MacArthur Airport is not the only way to get to San Francisco International Airport. Try looking for flights from Westchester County Airport (HPN) as well. Over the next two months, flights from HPN to SFO are being priced 12% cheaper than flights from ISP to SFO. Being only 37 miles away, it's easily accessible for most.

Question : Which airline is offering the cheapest flight from ISP to SFO?
Answer : American Airlines is your best bet for finding that coveted low fare. They're offering fares as low as $344, while prices for other flights are as high as $1,015.