SFO - ISP

$156 Find Cheap Flights from San Francisco to Islip - Compare and Save

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 10/17. 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

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Everything you should know

Cheapest round-trip
$389
Southwest
Wed 8/19Wed 8/26
SFO - ISP • 1 stop
Cheapest one-way
$156
Southwest
Sat 10/17
SFO - ISP • 1 stop
Top airlines
Cheapest • from $389 (round-trip)
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between San Francisco and Islip. You'll need at least 1 connection.
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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, Aug 19 - Wed, Aug 26
Southwest Logo
10:30 pm - 9:40 am
SFO
-
ISP
8h 10m
1 stop
Southwest Logo
6:05 am - 11:35 am
ISP
-
SFO
8h 30m
1 stop
$389Southwest
Wed, Aug 19 - Wed, Aug 26
Southwest Logo
11:05 pm - 12:35 pm
SFO
-
ISP
10h 30m
2 stops
Southwest Logo
6:05 am - 11:35 am
ISP
-
SFO
8h 30m
1 stop
$394Southwest
Wed, Aug 19 - Wed, Aug 26
Southwest Logo
11:05 pm - 12:35 pm
SFO
-
ISP
10h 30m
2 stops
Southwest Logo
6:05 am - 2:05 pm
ISP
-
SFO
11h 00m
2 stops
$399Southwest
Fri, Aug 28 - Tue, Sep 1
Southwest Logo
10:30 pm - 2:30 pm
SFO
-
ISP
13h 00m
1 stop
Southwest Logo
6:05 am - 11:35 am
ISP
-
SFO
8h 30m
1 stop
$407Southwest
Fri, Aug 28 - Tue, Sep 1
Southwest Logo
6:45 am - 10:05 pm
SFO
-
ISP
12h 20m
2 stops
Southwest Logo
3:20 pm - 11:20 pm
ISP
-
SFO
11h 00m
2 stops
$412Southwest
Wed, Oct 14 - Thu, Oct 22
Southwest Logo
9:35 pm - 11:45 am
SFO
-
ISP
11h 10m
1 stop
Southwest Logo
6:00 am - 2:35 pm
ISP
-
SFO
11h 35m
1 stop
$413Southwest
Wed, Sep 2 - Tue, Sep 8
Southwest Logo
10:30 pm - 9:40 am
SFO
-
ISP
8h 10m
1 stop
Southwest Logo
6:05 am - 11:35 am
ISP
-
SFO
8h 30m
1 stop
$467Southwest
Thu, Aug 20 - Thu, Aug 27
Southwest Logo
7:55 pm - 9:40 am
SFO
-
ISP
10h 45m
2 stops
Southwest Logo
6:10 am - 1:00 pm
ISP
-
SFO
9h 50m
1 stop
$482Southwest
Thu, Aug 20 - Thu, Aug 27
Southwest Logo
7:55 pm - 9:40 am
SFO
-
ISP
10h 45m
2 stops
Southwest Logo
12:35 pm - 7:05 pm
ISP
-
SFO
9h 30m
2 stops
$487Southwest
Thu, Sep 10 - Mon, Sep 14
JetBlue Logo
10:28 am - 11:22 pm
SFO
-
ISP
9h 54m
1 stop
JetBlue Logo
7:00 am - 9:05 am
ISP
-
SFO
29h 05m
1 stop
$490JetBlue
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.

Which airlines provide the cheapest flights from San Francisco to Islip?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 5 days.

In the past 5 days, the cheapest round-trip tickets from San Francisco to Islip were found on Southwest ($389) and JetBlue ($490).

Good to know

Cheapest flight

$156
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 5 days, the lowest price for a flight from San Francisco to Islip was $156 for a one-way ticket and $389 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 4238 reviews
8.0Comfort
7.0Food
8.1Boarding
8.6Crew
7.5Entertainment
Airline reviews

I think Southwest is the number one airline that anyone can fly I have flown for the first time Frontier and what a joke and their customer service United was a very strange experience I'm only sticking to Southwest from here on out for sure

10.0 Excellentkelly, Jul 2026
SFO - PHX
Read more Southwest reviews

I think Southwest is the number one airline that anyone can fly I have flown for the first time Frontier and what a joke and their customer service United was a very strange experience I'm only sticking to Southwest from here on out for sure

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

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

The weather could have been better. There was a 40 minute ATC delay in SFO because of marine fog and a micro cell storm delayed landing and take-off at Nashville. The gate was changed 5 minutes from boarding from gate B3 to gate C23 at Nashville airport.

The cabin was quiet for the redeye flight. The area was clean. The staff was great. The 787 Max was in good condition. Drawbacks were that the seat widths were tight for some passengers. The seat padding was at best average and for a long flight uncomfortable.

Employees were kind and funny, as always! Flight was late but no announcements were made for people with tight connections to help them transition quickly. No service due to turbulence.

I used to fly SWA all the time. I know the crew has their little acts that are often fun, and entertaining. On this flight one of the crew was just not nice. Very surprising.

The flight was delayed for almost an hour. We sat on the tarmac. There was no announcement. Not by the pilot or the crew. And for some reason, there was no beverage service, so even though it was a short flight, we had sat on the tarmac and the extra hour delay made me understandably thirsty. Water would’ve been nice if they had offered it. And for the first time, I forgot to bring my own water bottle. Reminder to bring your own water bottle because you never know if you’re going to get a beverage.

It was a new plane with larger overhead bins & charging ports at the seats.

Luggage was intact and arrived at the destination. What more could you ask for.. haha. The delay in arrival wasn’t SW fault.. just selfish passengers not wanting to check their luggage knowing they were in the last boarding groups

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

Information on your arrival and departure airports