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Cheap flights from Islip, New York to San Francisco from $233

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 1/8. 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.
Frontier Logo
8:29 pm - 9:50 pmISP-SFO
28h 21m2 stops
Frontier Logo
10:49 am - 9:13 amSFO-ISP
19h 24m2 stops
$325Frontier
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Fri, Dec 5 - Fri, Dec 12
Southwest Logo
6:00 am - 1:25 pmISP-SFO
10h 25m1 stop
Southwest Logo
9:20 pm - 11:40 amSFO-ISP
11h 20m1 stop
$412Southwest
Find Deal
Tue, Mar 3 - Sun, Mar 8
Southwest Logo
6:00 am - 4:55 pmISP-SFO
13h 55m2 stops
Southwest Logo
9:20 pm - 11:40 amSFO-ISP
11h 20m1 stop
$418Southwest
Find Deal
Tue, Mar 3 - Sun, Mar 8
Southwest Logo
12:40 pm - 10:20 pmISP-SFO
12h 40m2 stops
Southwest Logo
10:55 pm - 11:40 amSFO-ISP
9h 45m2 stops
$439Southwest
Find Deal
Tue, Mar 3 - Sun, Mar 8
JetBlue Logo
4:25 pm - 11:30 pmISP-SFO
10h 05m1 stop
JetBlue Logo
9:44 pm - 11:05 amSFO-ISP
10h 21m1 stop
$518JetBlue
Find Deal
Mon, Nov 24 - Wed, Dec 3
JetBlue Logo
4:25 pm - 11:30 pmISP-SFO
10h 05m1 stop
JetBlue Logo
11:00 pm - 11:05 amSFO-ISP
9h 05m1 stop
$721JetBlue
Find Deal
Mon, Nov 24 - Mon, Dec 1
Breeze Airways Logo
8:47 pm - 11:54 amISP-SFO
18h 07m2 stops
Breeze Airways Logo
12:47 pm - 5:14 pmSFO-ISP
25h 27m3 stops
$858Breeze Airways
Find Deal
Fri, Dec 5 - Fri, Dec 12
Multiple Airlines Logo
9:59 am - 9:33 amISP-SFO
26h 34m3 stops
Multiple Airlines Logo
11:59 pm - 4:10 pmSFO-ISP
13h 11m2 stops
$951Multiple Airlines
Find Deal
Tue, Mar 3 - Sun, Mar 8
Breeze Airways Logo
7:08 pm - 12:05 pmISP-SFO
43h 57m3 stops
Breeze Airways Logo
12:47 pm - 5:14 pmSFO-ISP
25h 27m3 stops
$970Breeze Airways
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Fri, Dec 5 - Fri, Dec 12
Multiple Airlines Logo
12:40 pm - 11:20 pmISP-SFO
13h 40m1 stop
Multiple Airlines Logo
7:45 am - 7:45 pmSFO-ISP
9h 00m1 stop
$1,173Multiple Airlines
Find Deal
Mon, Nov 24 - Fri, Nov 28

Southwest flights from Islip, New York to San Francisco

Our best Southwest deals on Islip, New York to San Francisco flight tickets
Southwest
Mar 3
ISP6:00 amIslip Long Island
10h 25m
1 stop
SFO1:25 pmSan Francisco
Mar 8
SFO9:20 pmSan Francisco
11h 20m
1 stop
ISP11:40 amIslip Long Island
$412
Find similar
Southwest
Mar 3
ISP6:00 amIslip Long Island
13h 55m
2 stops
SFO4:55 pmSan Francisco
Mar 8
SFO9:20 pmSan Francisco
11h 20m
1 stop
ISP11:40 amIslip Long Island
$418
Find similar
Southwest
Mar 3
ISP12:40 pmIslip Long Island
12h 40m
2 stops
SFO10:20 pmSan Francisco
Mar 8
SFO10:55 pmSan Francisco
9h 45m
2 stops
ISP11:40 amIslip Long Island
$439
Find similar

JetBlue flights from Islip, New York to San Francisco

Our best JetBlue deals on Islip, New York to San Francisco flight tickets
JetBlue
Nov 24
ISP4:25 pmIslip Long Island
10h 05m
1 stop
SFO11:30 pmSan Francisco
Dec 3
SFO9:44 pmSan Francisco
10h 21m
1 stop
ISP11:05 amIslip Long Island
$518
Find similar
JetBlue
Nov 24
ISP4:25 pmIslip Long Island
10h 05m
1 stop
SFO11:30 pmSan Francisco
Dec 1
SFO11:00 pmSan Francisco
9h 05m
1 stop
ISP11:05 amIslip Long Island
$721
Find similar
JetBlue
Nov 14
ISP1:55 pmIslip Long Island
12h 36m
1 stop
SFO11:31 pmSan Francisco
Nov 16
SFO9:44 pmSan Francisco
12h 07m
1 stop
ISP12:51 pmIslip Long Island
$805
Find similar

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 November 10, 2025.
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

Fri 12/5

8:29 pm-9:50 pm

2 stops28h 21m

San Francisco

Fri 12/12

10:49 am-9:13 am

2 stops19h 24m

$325

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Tue 3/3

6:00 am-1:25 pm

1 stop10h 25m

San Francisco

Sun 3/8

9:20 pm-11:40 am

1 stop11h 20m

$412

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Tue 3/3

6:00 am-4:55 pm

2 stops13h 55m

San Francisco

Sun 3/8

9:20 pm-11:40 am

1 stop11h 20m

$418

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Tue 3/3

12:40 pm-10:20 pm

2 stops12h 40m

San Francisco

Sun 3/8

10:55 pm-11:40 am

2 stops9h 45m

$439

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Mon 11/24

4:25 pm-11:30 pm

1 stop10h 05m

San Francisco

Wed 12/3

9:44 pm-11:05 am

1 stop10h 21m

$518

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Mon 11/24

4:25 pm-11:30 pm

1 stop10h 05m

San Francisco

Mon 12/1

11:00 pm-11:05 am

1 stop9h 05m

$721

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Fri 12/5

8:47 pm-11:54 am

2 stops18h 07m

San Francisco

Fri 12/12

12:47 pm-5:14 pm

3 stops25h 27m

$858

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Tue 3/3

9:59 am-9:33 am

3 stops26h 34m

San Francisco

Sun 3/8

11:59 pm-4:10 pm

2 stops13h 11m

$951

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Fri 12/5

7:08 pm-12:05 pm

3 stops43h 57m

San Francisco

Fri 12/12

12:47 pm-5:14 pm

3 stops25h 27m

$970

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Mon 11/24

12:40 pm-11:20 pm

1 stop13h 40m

San Francisco

Fri 11/28

7:45 am-7:45 pm

1 stop9h 00m

$1,173

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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 $415. The most expensive day to fly to San Francisco is Sunday, with ticket prices averaging around $587.

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 $390. Flights in the afternoon are often more expensive with an average ticket price of $510.

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

Direct flights

None
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.
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  • 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 10h 05m, 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
Calistoga
Hayward
Big Sur
Santa Clara
Daly City
Fremont
Berkeley
Vallejo
Walnut Creek
Half Moon Bay
Salinas
Livermore
Turlock
South San Francisco

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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