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Cheap flights from Islip, New York to San Francisco from $158

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Islip, New York to San Francisco departing on 2/12. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Islip, New York to San Francisco

Cheap round-trip flights

Enter your travel dates to find the best prices.
Southwest Logo
4:05 pm - 9:55 pm
ISP
-
SFO
8h 50m
1 stop
Southwest Logo
9:30 pm - 11:55 am
SFO
-
ISP
11h 25m
1 stop
$373Southwest
Tue, Feb 17 - Tue, Feb 24
Southwest Logo
4:05 pm - 9:55 pm
ISP
-
SFO
8h 50m
1 stop
Southwest Logo
7:40 am - 9:55 pm
SFO
-
ISP
11h 15m
2 stops
$385Southwest
Tue, Feb 17 - Tue, Feb 24
Southwest Logo
6:00 am - 1:25 pm
ISP
-
SFO
10h 25m
1 stop
Southwest Logo
7:40 am - 9:55 pm
SFO
-
ISP
11h 15m
2 stops
$398Southwest
Wed, Feb 18 - Wed, Feb 25
Southwest Logo
6:00 am - 1:25 pm
ISP
-
SFO
10h 25m
1 stop
Southwest Logo
9:30 pm - 12:25 pm
SFO
-
ISP
11h 55m
1 stop
$399Southwest
Wed, Feb 18 - Wed, Feb 25
Southwest Logo
11:50 am - 8:15 pm
ISP
-
SFO
11h 25m
2 stops
Southwest Logo
9:50 am - 9:55 pm
SFO
-
ISP
9h 05m
2 stops
$404Southwest
Tue, Feb 17 - Tue, Feb 24
JetBlue Logo
1:27 pm - 11:59 pm
ISP
-
SFO
13h 32m
1 stop
JetBlue Logo
11:12 am - 11:46 pm
SFO
-
ISP
9h 34m
1 stop
$409JetBlue
Tue, Mar 3 - Fri, Mar 13
Southwest Logo
2:00 pm - 9:30 pm
ISP
-
SFO
10h 30m
2 stops
Southwest Logo
10:55 pm - 11:40 am
SFO
-
ISP
9h 45m
2 stops
$431Southwest
Fri, Mar 13 - Mon, Mar 16
Southwest Logo
4:30 pm - 11:20 pm
ISP
-
SFO
9h 50m
1 stop
Southwest Logo
11:25 pm - 1:50 pm
SFO
-
ISP
11h 25m
2 stops
$452Southwest
Fri, May 29 - Mon, Jun 1
Southwest Logo
4:30 pm - 11:20 pm
ISP
-
SFO
9h 50m
1 stop
Southwest Logo
9:15 pm - 1:50 pm
SFO
-
ISP
13h 35m
1 stop
$453Southwest
Fri, May 29 - Mon, Jun 1
Southwest Logo
4:30 pm - 12:10 am
ISP
-
SFO
10h 40m
2 stops
Southwest Logo
11:25 pm - 1:50 pm
SFO
-
ISP
11h 25m
2 stops
$458Southwest
Fri, May 29 - Mon, Jun 1

Breeze Airways flights from Islip, New York to San Francisco

Our best Breeze Airways deals on Islip, New York to San Francisco flight tickets
Breeze Airways
May 29
ISP8:43 pmIslip Long Island
17h 54m
2 stops
SFO11:37 amSan Francisco
Jun 1
SFO12:18 pmSan Francisco
19h 58m
3 stops
ISP11:16 amIslip Long Island
$749
Breeze Airways
May 29
ISP8:31 pmIslip Long Island
42h 31m
3 stops
SFO12:02 pmSan Francisco
Jun 1
SFO12:18 pmSan Francisco
19h 58m
3 stops
ISP11:16 amIslip Long Island
$850

Southwest flights from Islip, New York to San Francisco

Our best Southwest deals on Islip, New York to San Francisco flight tickets
Southwest
Feb 17
ISP4:05 pmIslip Long Island
8h 50m
1 stop
SFO9:55 pmSan Francisco
Feb 24
SFO9:30 pmSan Francisco
11h 25m
1 stop
ISP11:55 amIslip Long Island
$373
Southwest
Feb 17
ISP4:05 pmIslip Long Island
8h 50m
1 stop
SFO9:55 pmSan Francisco
Feb 24
SFO7:40 amSan Francisco
11h 15m
2 stops
ISP9:55 pmIslip Long Island
$385
Southwest
Feb 18
ISP6:00 amIslip Long Island
10h 25m
1 stop
SFO1:25 pmSan Francisco
Feb 25
SFO7:40 amSan Francisco
11h 15m
2 stops
ISP9:55 pmIslip Long Island
$398

momondo Fare Finder

 
Customize your flight search to find flights from Islip, New York to San Francisco that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated January 21, 2026.
Use the filters below to find and compare flights from Islip, New York to San Francisco that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Tue 2/17

4:05 pm-9:55 pm

1 stop8h 50m

San Francisco

Tue 2/24

9:30 pm-11:55 am

1 stop11h 25m

$373

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Tue 2/17

4:05 pm-9:55 pm

1 stop8h 50m

San Francisco

Tue 2/24

7:40 am-9:55 pm

2 stops11h 15m

$385

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Wed 2/18

6:00 am-1:25 pm

1 stop10h 25m

San Francisco

Wed 2/25

7:40 am-9:55 pm

2 stops11h 15m

$398

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Wed 2/18

6:00 am-1:25 pm

1 stop10h 25m

San Francisco

Wed 2/25

9:30 pm-12:25 pm

1 stop11h 55m

$399

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Tue 2/17

11:50 am-8:15 pm

2 stops11h 25m

San Francisco

Tue 2/24

9:50 am-9:55 pm

2 stops9h 05m

$404

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Tue 3/3

1:27 pm-11:59 pm

1 stop13h 32m

San Francisco

Fri 3/13

11:12 am-11:46 pm

1 stop9h 34m

$409

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Fri 3/13

2:00 pm-9:30 pm

2 stops10h 30m

San Francisco

Mon 3/16

10:55 pm-11:40 am

2 stops9h 45m

$431

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Fri 5/29

4:30 pm-11:20 pm

1 stop9h 50m

San Francisco

Mon 6/1

11:25 pm-1:50 pm

2 stops11h 25m

$452

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Fri 5/29

4:30 pm-11:20 pm

1 stop9h 50m

San Francisco

Mon 6/1

9:15 pm-1:50 pm

1 stop13h 35m

$453

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Fri 5/29

4:30 pm-12:10 am

2 stops10h 40m

San Francisco

Mon 6/1

11:25 pm-1:50 pm

2 stops11h 25m

$458

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to San Francisco from

How to get the cheapest flight ticket from Islip, New York to San Francisco

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest day to depart on your flight to San Francisco?

The cheapest day to depart from Islip, New York to San Francisco is on a Thursday when prices can be found for as low as $408. The most expensive day to fly to San Francisco is Sunday, with ticket prices averaging around $579.

What is the cheapest time of day to depart on your flight to San Francisco?

Our data shows that the cheapest Islip, New York to San Francisco flights are usually those with departure times in the evening. Our users have found flights to San Francisco in the evening for as low as $388. Flights in the afternoon are often more expensive with an average ticket price of $485.

When to book flights from Islip, New York to San Francisco

Are you open to changing your travel dates? Check out the ideal times to fly from Islip, New York to San Francisco according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Islip, New York to San Francisco (ISP to SFO) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Islip, New York to San Francisco

Fastest flight time

8h 50m

Direct flights

None
The fastest flight from Islip, New York to San Francisco takes 8h 50m
There are no direct flights from Islip, New York to San Francisco. There are no popular flight routes from Islip, New York to San Francisco.
Search flight deals

  • How far is Islip Long Island to San Francisco by plane?

    A flight from Islip Long Island to San Francisco will travel around 2603.7 mi. Flights usually cover this in 8h 50m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from Islip Long Island Airport to San Francisco Airport?

    Prices for flights from Islip Long Island Airport to San Francisco Airport are refreshed on a daily basis.

  • How old do you have to be to fly from Islip Long Island Airport to San Francisco Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Islip Long Island Airport to San Francisco Airport.

  • What documentation or ID do you need to fly to San Francisco Airport?

    The required travel and health documents for your San Francisco Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at San Francisco Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Traveling to a place near San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
Santa Cruz
Carmel-by-the-Sea
Modesto
Sonoma
Bodega Bay
Roseville
Hayward
Calistoga
Big Sur
Santa Clara
Berkeley
Walnut Creek
Fremont
Daly City
Half Moon Bay
Salinas
Vallejo
Livermore
Sunnyvale
Turlock

Why use momondo?

Why should I use momondo to find a flight deal from Islip to San Francisco?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Islip to San Francisco for you.

Can I find flights from Islip to San Francisco with flexible booking policies on momondo?

All flight searches from Islip to San Francisco on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Islip to San Francisco?

Once all potential Islip to San Francisco flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Islip to San Francisco right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Islip to San Francisco flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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