SFO - ISP

$105 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 5/26. 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
$415
Frontier
Fri 5/29Mon 6/1
SFO - ISP • 1 stop
Cheapest one-way
$105
Frontier
Tue 5/26
SFO - ISP • 1 stop
Top airlines
Cheapest • from $415 (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.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $500 (round-trip)
Shortest trip • 9h 32m (one-way)
Insights
Insights
Insights
Insights
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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

Fri, May 29 - Mon, Jun 1
Frontier Logo
8:44 pm - 10:05 am
SFO
-
ISP
10h 21m
1 stop
Frontier Logo
11:00 am - 10:41 am
ISP
-
SFO
26h 41m
1 stop
$415Frontier
Fri, May 1 - Tue, May 5
Southwest Logo
10:55 pm - 11:35 am
SFO
-
ISP
9h 40m
2 stops
Southwest Logo
4:10 pm - 9:25 pm
ISP
-
SFO
8h 15m
1 stop
$430Southwest
Fri, May 1 - Tue, May 5
Southwest Logo
10:55 pm - 11:35 am
SFO
-
ISP
9h 40m
2 stops
Southwest Logo
4:10 pm - 11:15 pm
ISP
-
SFO
10h 05m
2 stops
$435Southwest
Thu, Jul 23 - Tue, Jul 28
Multiple Airlines Logo
8:51 pm - 10:03 am
SFO
-
ISP
10h 12m
1 stop
Multiple Airlines Logo
5:00 pm - 11:54 pm
ISP
-
SFO
9h 54m
1 stop
$452Multiple Airlines
Thu, Jul 23 - Tue, Jul 28
Southwest Logo
9:10 pm - 8:20 am
SFO
-
ISP
8h 10m
1 stop
Southwest Logo
2:55 pm - 7:50 pm
ISP
-
SFO
7h 55m
1 stop
$467Southwest
Thu, Jul 23 - Tue, Jul 28
Southwest Logo
9:10 pm - 8:20 am
SFO
-
ISP
8h 10m
1 stop
Southwest Logo
4:40 pm - 11:15 pm
ISP
-
SFO
9h 35m
2 stops
$472Southwest
Tue, Aug 4 - Mon, Aug 10
Frontier Logo
8:51 pm - 10:03 am
SFO
-
ISP
10h 12m
1 stop
Frontier Logo
10:48 am - 10:29 am
ISP
-
SFO
26h 41m
1 stop
$480Frontier
Tue, May 26 - Sat, May 30
JetBlue Logo
8:40 pm - 11:35 am
SFO
-
ISP
11h 55m
1 stop
JetBlue Logo
12:00 pm - 12:33 am
ISP
-
SFO
15h 33m
1 stop
$484JetBlue
Tue, Apr 21 - Mon, Apr 27
JetBlue Logo
8:00 am - 8:09 pm
SFO
-
ISP
9h 09m
1 stop
JetBlue Logo
9:04 pm - 11:09 am
ISP
-
SFO
17h 05m
1 stop
$490JetBlue
Mon, Jun 1 - Sat, Jun 6
JetBlue Logo
8:40 pm - 11:35 am
SFO
-
ISP
11h 55m
1 stop
JetBlue Logo
12:00 pm - 12:33 am
ISP
-
SFO
15h 33m
1 stop
$494JetBlue
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 Frontier ($415) and Southwest ($430).

Good to know

Cheapest flight$105
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 $105 for a one-way ticket and $415 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 4334 reviews
8.0Comfort
8.6Crew
8.1Boarding
7.5Entertainment
7.0Food
Airline reviews

It was good from LAX to Phoenix, But the connection in Phoenix to Tulsa was not that great. The staff on both flights were great. The choice of free entertainment was ok nothing to brag about. The 45 min delay because of some electrical issue wasn't great from Phoenix to Tulsa. We sat there with hardly any air, The seat I had was between windows so the side of the plane pushed in on you. My being a bigger man it then made the seating area uncomfortable. The seats on the plane had no power to connect to recharge your phone or anything. I would recommend that they should look into a slot or clamp to hold your phone to enjoy while watching the entertainment choices hands-free. Also make it possible to raise the inner seat by the window be able to raise the arm rest up to make more room for larger people to set more comfortably. I would also say other then that stop price gouging the airfare or nickel and diming everything. Not fair for people having to fly for emergencies and be paying for higher prices due to the season or holidays. Your making your money either way and the cost of flying is still going to be the same regardless if there's 100 people or 200 people.

10.0 ExcellentAnthony & Kathy, Mar 2026
LAX - PHX
Read more Southwest reviews

It was good from LAX to Phoenix, But the connection in Phoenix to Tulsa was not that great. The staff on both flights were great. The choice of free entertainment was ok nothing to brag about. The 45 min delay because of some electrical issue wasn't great from Phoenix to Tulsa. We sat there with hardly any air, The seat I had was between windows so the side of the plane pushed in on you. My being a bigger man it then made the seating area uncomfortable. The seats on the plane had no power to connect to recharge your phone or anything. I would recommend that they should look into a slot or clamp to hold your phone to enjoy while watching the entertainment choices hands-free. Also make it possible to raise the inner seat by the window be able to raise the arm rest up to make more room for larger people to set more comfortably. I would also say other then that stop price gouging the airfare or nickel and diming everything. Not fair for people having to fly for emergencies and be paying for higher prices due to the season or holidays. Your making your money either way and the cost of flying is still going to be the same regardless if there's 100 people or 200 people.

Had a great flight. Delayed takeoff, but comfortable. Snacks were good.

Southwest was greaat! The most expensive but the least upsetting for those we were flying to see.

Boarding was easy. The seats are small and fairly uncomfortable

The problem with the seat assignments is that there were a lot of rows in the front that were empty but my row at the back was full. Just not so pleasant.

Good but I prefer choose your own seat. With the new assigned seats they should board from the back I see no advantage to this new boarding. Just like every other airline

Flight boarded late after announcing on time boarding. Flight arrived only a little late despite late departure. Had trouble connecting to WiFi

The Southwest experience has definitely taken a dive from its early days. You can no longer deferentiate from other airlines. Air travel is too expensive. Southwest is no longer budget friendly. They have lost me as a loyal customer.

The charges were ridiculous for an hour flight and the turbulence was very scary.

The seats are now more narrow. I paid for front row the seats in the front are even more narrow than before.

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

Information on your arrival and departure airports