SFO - ISP

$155 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 11/3. 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

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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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

Tue, Sep 16 - Thu, Sep 18
Southwest Logo
9:05 pm - 11:55 amSFO-ISP
11h 50m1 stop
Southwest Logo
3:05 pm - 8:10 pmISP-SFO
8h 05m1 stop
$392Southwest
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Tue, Oct 21 - Tue, Oct 28
Frontier Logo
6:34 am - 10:57 amSFO-ISP
25h 23m2 stops
Frontier Logo
6:27 pm - 9:11 pmISP-SFO
53h 44m2 stops
$441Frontier
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Sat, Oct 25 - Sat, Nov 1
JetBlue Logo
11:20 pm - 1:02 pmSFO-ISP
10h 42m1 stop
JetBlue Logo
1:57 pm - 11:31 pmISP-SFO
12h 34m1 stop
$448JetBlue
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Mon, Sep 15 - Thu, Sep 18
Frontier Logo
7:07 pm - 10:40 amSFO-ISP
12h 33m2 stops
Frontier Logo
11:40 am - 11:02 pmISP-SFO
14h 22m2 stops
$453Frontier
Find Deal
Tue, Feb 3 - Tue, Feb 10
JetBlue Logo
10:40 pm - 11:20 amSFO-ISP
9h 40m1 stop
JetBlue Logo
1:15 pm - 11:33 pmISP-SFO
13h 18m1 stop
$459JetBlue
Find Deal
Fri, Sep 12 - Thu, Sep 18
Frontier Logo
1:15 pm - 10:55 amSFO-ISP
18h 40m2 stops
Frontier Logo
11:40 am - 11:02 pmISP-SFO
14h 22m2 stops
$461Frontier
Find Deal
Tue, Sep 9 - Tue, Sep 16
Southwest Logo
7:50 am - 10:05 pmSFO-ISP
11h 15m2 stops
Southwest Logo
6:05 am - 1:25 pmISP-SFO
10h 20m1 stop
$472Southwest
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Sun, Sep 14 - Thu, Sep 18
Frontier Logo
11:57 pm - 4:27 pmSFO-ISP
13h 30m2 stops
Frontier Logo
11:40 am - 11:02 pmISP-SFO
14h 22m2 stops
$473Frontier
Find Deal
Wed, Sep 24 - Wed, Oct 1
Breeze Airways Logo
12:39 pm - 6:56 pmSFO-ISP
27h 17m3 stops
Breeze Airways Logo
8:21 pm - 12:05 pmISP-SFO
18h 44m2 stops
$659Breeze Airways
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Wed, Sep 24 - Wed, Oct 1
Breeze Airways Logo
12:39 pm - 1:39 pmSFO-ISP
22h 00m1 stop
Breeze Airways Logo
8:21 pm - 12:05 pmISP-SFO
18h 44m2 stops
$675Breeze Airways
Find Deal
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 72 hours.

In the past 3 days, the cheapest round-trip tickets from San Francisco to Islip were found on Southwest ($392) and Frontier ($441).

Good to know

Cheapest flight$155
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 $155 for a one-way ticket and $392 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 4241 reviews
7.5Entertainment
8.6Crew
7.0Food
8.1Boarding
8.0Comfort
Airline reviews

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.

10.0 ExcellentJoseph, Aug 2025SFO - BWI
Read more Southwest reviews

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.

Delayed flight. Nicest crew member was a SW pilot flying seated next to me who kindly move to seat the final passenger. Flight extra delayed. My cup of refreshment of ginger ale was so packed with ice it was literally 2 sips.

after landing, we stay 2 hours on the taxi way before reaching the gate The airline and the crew were good though

No trays in our seats, we sat in first row, purchased a business class fare. Had to hold our drinks and snack in our hands. No plugs for our cell phones. Had to pay for it a drink cocktail each. Seats so uncomfortable.

Flight wasn’t even full, but too many carry-ons caused us to run out of bin space. New bag fee has folks who would usually check their bags carrying on. Watching Southwest morph into Spirit/Frontier is so sad to watch

Southwest is Southwest. No frills. If you're luck enough to get a happy crew (we did), then it makes for a nicer flight.

It was a perfect flight in all aspects! Both legs!

Great flight, 47 passengers on a 180 seat plane. Stewardess was pleasant and cheerful.

I liked the crew member who gave flight instructions on "in case of a problem:. The seats are so small that only a young teenager could sit in middle seat.

My flight to Chicago left and landed early. My return flight left two minutes late and arrived 2 minutes late. My seat selections were ideal! There were no snacks going to Chicago and no snacks on the return trip. There are no charging outlets on board.

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

Information on your arrival and departure airports

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