SFO - ISP

$229 Find Cheap Flights from San Francisco to Islip

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from San Francisco to Islip departing on 2/14. 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 Islip

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from San Francisco to Islip, 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 San Francisco to Islip, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$425
Southwest
Wed 4/1Mon 4/13
SFO - ISP • 2 stops
Cheapest one-way
$229
Typical prices: $430-$489
Southwest
Sat 2/14
SFO - ISP • 1 stop
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Islip!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from San Francisco to Islip (SFO-ISP)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from San Francisco to Islip 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 San Francisco to Islip

Wed, Apr 1 - Mon, Apr 13
Southwest Logo
11:25 pm - 11:40 am
SFO
-
ISP
9h 15m
2 stops
Southwest Logo
4:30 pm - 11:20 pm
ISP
-
SFO
9h 50m
1 stop
$425Southwest
Fri, Feb 27 - Mon, Mar 2
Southwest Logo
9:30 pm - 12:05 pm
SFO
-
ISP
11h 35m
1 stop
Southwest Logo
4:05 pm - 9:55 pm
ISP
-
SFO
8h 50m
1 stop
$426Southwest
Fri, Feb 27 - Mon, Mar 2
Southwest Logo
6:50 pm - 12:05 pm
SFO
-
ISP
14h 15m
2 stops
Southwest Logo
4:05 pm - 9:55 pm
ISP
-
SFO
8h 50m
1 stop
$431Southwest
Fri, Feb 27 - Mon, Mar 2
Southwest Logo
6:50 pm - 12:05 pm
SFO
-
ISP
14h 15m
2 stops
Southwest Logo
5:55 am - 2:50 pm
ISP
-
SFO
11h 55m
2 stops
$436Southwest
Booking Insights

KAYAK's insights & trends for San Francisco to Islip flights

Get data-powered insights and trends into flights from San Francisco to Islip to help you find the cheapest flights, the best time to fly and much more.

What is the most popular layover airport when flying from San Francisco to Islip?

Percentage of 1-stop round-trip flights from San Francisco to Islip chosen by KAYAK users via each layover airport in the last 12 months (only includes trips with the same layover airport on both legs).

Baltimore (BWI) is the top choice – 67% of KAYAK users who clicked on 1-stop flights from San Francisco to Islip picked an itinerary connecting there.

What is the cheapest layover airport when flying from San Francisco to Islip?

Average round-trip price for 1-stop flights from San Francisco to Islip clicked by KAYAK users in the last 12 months (only includes trips with the same layover airport on both legs).

Flights via Boston (BOS) offer the most affordable fares, with an average round-trip price of $500.

Which layover airport offers the shortest total travel time from San Francisco to Islip?

Shortest average total travel time for 1-stop one-way flights from San Francisco to Islip via different layover airports, based on KAYAK user data from the last 12 months.

Consider flying via Boston (BOS) for the shortest journey. The average one-way travel time for flights connecting there is 10h 28m.

Which layover airport has the quickest connection when flying from San Francisco to Islip?

Average layover duration at different layover airports for 1-stop one-way flights from San Francisco to Islip, based on KAYAK user data from the last 12 months.

If you prefer a quick connection, Baltimore (BWI) often has the shortest layovers from San Francisco to Islip, with an average of 2h 48m.

Find deals

Good to know

Cheapest flight$229
Flight from San Francisco to Islip

When to book flights from San Francisco to Islip

Are your dates flexible? Find out the best times to travel from San Francisco to Islip 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 San Francisco to Islip

  • What is the cheapest flight from San Francisco to Islip?

    In the last 3 days, the lowest price for a flight from San Francisco to Islip was $229 for a one-way ticket and $452 for a round-trip.

  • Do I need a passport to fly between San Francisco and Islip?

    A passport is not required to fly from San Francisco to Islip.

  • Which airports will I be using when flying from San Francisco to Islip?

    When flying out of San Francisco you will be using San Francisco. You will be landing at Islip, also known as Islip Long Island.

  • Which aircraft models fly most regularly from San Francisco to Islip?

    We unfortunately don’t have that data for this specific route.

  • How does KAYAK find such low prices on flights from San Francisco to Islip?

    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 San Francisco to Islip.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from San Francisco to Islip?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Islip from San Francisco 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 San Francisco to Islip?

    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 Islip with an airline and back to San Francisco with another airline. Booking your flights between San Francisco and ISP 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 San Francisco to Islip?

    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 Islip from San Francisco 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 San Francisco to Islip

 
See real verified KAYAK customer reviews for airlines flying from San Francisco to Islip. 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 San Francisco to Islip? 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 4261 reviews
7.5Entertainment
8.6Crew
7.0Food
8.0Comfort
8.1Boarding
Airline reviews

3 hour delay. Had to change plans and was still delayed.

2.0 MediocreAnonymous, Jan 2026
SFO - SAN
Read more Southwest reviews

3 hour delay. Had to change plans and was still delayed.

We got exit row seats both flights. Everything was running on time

Pretty seamless, just a tad bit late in taking off and landing.

The boarding and seat assignment system no longer works for me, but I know it is being replaced. Otherwise, I am good with the overall experience.

The lead steward kept singing about "San Francisco" and hotel California---more annoying than humorous....needs work. Flight was smooth and on time.

San Diego airport is brand new, spacious, airy and very smooth checkin at SW baggage drop.

Crew could have been friendlier, maybe I'm spoiled by SW crews. In flight wifi was good. Would be nice to have more food offerings on a 4 plus hour flight

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.

Sacrament staff are always polite and helpful. Airport is easy to maneuver and boarding is straightforward.

As always, the entire Southwest experience was wonderful, from online booking to flight to baggage retrieval. Very grateful.

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

Information on your arrival and departure airports

San Francisco (SFO)
Islip (ISP)