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Cheap flights from Islip, New York to San Francisco from $203

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 3/9. 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
6:00 am - 1:25 pm
ISP
-
SFO
10h 25m1 stop
Southwest Logo
9:30 pm - 11:45 am
SFO
-
ISP
11h 15m1 stop
$373Southwest
Mon, Jan 12 - Fri, Jan 16
Southwest Logo
12:40 pm - 10:20 pm
ISP
-
SFO
12h 40m2 stops
Southwest Logo
9:30 pm - 11:45 am
SFO
-
ISP
11h 15m1 stop
$378Southwest
Mon, Jan 12 - Fri, Jan 16
Southwest Logo
12:40 pm - 10:20 pm
ISP
-
SFO
12h 40m2 stops
Southwest Logo
7:50 am - 10:20 pm
SFO
-
ISP
11h 30m2 stops
$408Southwest
Mon, Jan 12 - Fri, Jan 16
JetBlue Logo
1:15 pm - 11:33 pm
ISP
-
SFO
13h 18m1 stop
JetBlue Logo
10:40 pm - 11:50 am
SFO
-
ISP
10h 10m1 stop
$508JetBlue
Tue, Apr 14 - Tue, Apr 28
Southwest Logo
12:55 pm - 10:30 pm
ISP
-
SFO
12h 35m2 stops
Southwest Logo
6:35 am - 8:50 pm
SFO
-
ISP
11h 15m2 stops
$613Southwest
Thu, Dec 25 - Sat, Dec 27
Southwest Logo
12:55 pm - 10:30 pm
ISP
-
SFO
12h 35m2 stops
Southwest Logo
9:25 pm - 11:55 am
SFO
-
ISP
11h 30m1 stop
$638Southwest
Thu, Dec 25 - Sat, Dec 27
JetBlue Logo
1:27 pm - 11:58 pm
ISP
-
SFO
13h 31m1 stop
JetBlue Logo
10:40 am - 11:55 pm
SFO
-
ISP
10h 15m1 stop
$749JetBlue
Wed, Mar 11 - Fri, Mar 20
Southwest Logo
5:40 am - 1:20 pm
ISP
-
SFO
10h 40m1 stop
Southwest Logo
9:25 pm - 11:55 am
SFO
-
ISP
11h 30m1 stop
$777Southwest
Thu, Dec 25 - Sat, Dec 27
Breeze Airways Logo
8:47 pm - 11:54 am
ISP
-
SFO
18h 07m2 stops
Breeze Airways Logo
12:50 pm - 7:41 pm
SFO
-
ISP
27h 51m2 stops
$1,000Breeze Airways
Fri, Dec 19 - Tue, Dec 23
Breeze Airways Logo
10:38 am - 12:02 pm
ISP
-
SFO
28h 24m3 stops
Breeze Airways Logo
12:39 pm - 9:58 am
SFO
-
ISP
18h 19m3 stops
$1,115Breeze Airways
Thu, Dec 25 - Sat, Dec 27

JetBlue flights from Islip, New York to San Francisco

Our best JetBlue deals on Islip, New York to San Francisco flight tickets
JetBlue
Apr 14
ISP1:15 pmIslip Long Island
13h 18m
1 stop
SFO11:33 pmSan Francisco
Apr 28
SFO10:40 pmSan Francisco
10h 10m
1 stop
ISP11:50 amIslip Long Island
$508
Find similar
JetBlue
Mar 11
ISP1:27 pmIslip Long Island
13h 31m
1 stop
SFO11:58 pmSan Francisco
Mar 20
SFO10:40 amSan Francisco
10h 15m
1 stop
ISP11:55 pmIslip Long Island
$749
Find similar
JetBlue
Dec 9
ISP11:50 amIslip Long Island
24h 28m
1 stop
SFO9:18 amSan Francisco
Dec 11
SFO7:45 amSan Francisco
24h 20m
1 stop
ISP11:05 amIslip Long Island
$1,018
Find similar

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
Dec 19
ISP8:47 pmIslip Long Island
18h 07m
2 stops
SFO11:54 amSan Francisco
Dec 23
SFO12:50 pmSan Francisco
27h 51m
2 stops
ISP7:41 pmIslip Long Island
$1,000
Find similar
Breeze Airways
Dec 25
ISP10:38 amIslip Long Island
28h 24m
3 stops
SFO12:02 pmSan Francisco
Dec 27
SFO12:39 pmSan Francisco
18h 19m
3 stops
ISP9:58 amIslip Long Island
$1,115
Find similar
Breeze Airways
Dec 19
ISP8:47 pmIslip Long Island
18h 07m
2 stops
SFO11:54 amSan Francisco
Dec 23
SFO12:50 pmSan Francisco
25h 24m
3 stops
ISP5:14 pmIslip Long Island
$1,276
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 December 5, 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

Mon 1/12

6:00 am-1:25 pm

1 stop10h 25m

San Francisco

Fri 1/16

9:30 pm-11:45 am

1 stop11h 15m

$373

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Mon 1/12

12:40 pm-10:20 pm

2 stops12h 40m

San Francisco

Fri 1/16

9:30 pm-11:45 am

1 stop11h 15m

$378

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Mon 1/12

12:40 pm-10:20 pm

2 stops12h 40m

San Francisco

Fri 1/16

7:50 am-10:20 pm

2 stops11h 30m

$408

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Tue 4/14

1:15 pm-11:33 pm

1 stop13h 18m

San Francisco

Tue 4/28

10:40 pm-11:50 am

1 stop10h 10m

$508

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Thu 12/25

12:55 pm-10:30 pm

2 stops12h 35m

San Francisco

Sat 12/27

6:35 am-8:50 pm

2 stops11h 15m

$613

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Thu 12/25

12:55 pm-10:30 pm

2 stops12h 35m

San Francisco

Sat 12/27

9:25 pm-11:55 am

1 stop11h 30m

$638

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Wed 3/11

1:27 pm-11:58 pm

1 stop13h 31m

San Francisco

Fri 3/20

10:40 am-11:55 pm

1 stop10h 15m

$749

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Thu 12/25

5:40 am-1:20 pm

1 stop10h 40m

San Francisco

Sat 12/27

9:25 pm-11:55 am

1 stop11h 30m

$777

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Fri 12/19

8:47 pm-11:54 am

2 stops18h 07m

San Francisco

Tue 12/23

12:50 pm-7:41 pm

2 stops27h 51m

$1,000

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Thu 12/25

10:38 am-12:02 pm

3 stops28h 24m

San Francisco

Sat 12/27

12:39 pm-9:58 am

3 stops18h 19m

$1,115

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 Wednesday when prices can be found for as low as $412. The most expensive day to fly to San Francisco is Sunday, with ticket prices averaging around $580.

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 $389. Flights in the afternoon are often more expensive with an average ticket price of $501.

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 00m

Direct flights

None
The fastest flight from Islip, New York to San Francisco takes 8h 00m
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 10h 25m, 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
Daly City
Fremont
Half Moon Bay
Vallejo
Salinas
Livermore
Turlock
Sunnyvale

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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