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Cheap flights from Islip, New York to San Francisco from $234

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 7/29. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

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 - 1:50 pm
ISP
-
SFO
10h 50m
1 stop
Southwest Logo
9:25 pm - 11:50 am
SFO
-
ISP
11h 25m
1 stop
$377Southwest
Wed, Nov 4 - Mon, Nov 9
Southwest Logo
6:00 am - 2:55 pm
ISP
-
SFO
11h 55m
2 stops
Southwest Logo
9:25 pm - 11:50 am
SFO
-
ISP
11h 25m
1 stop
$383Southwest
Wed, Nov 4 - Mon, Nov 9
Southwest Logo
2:55 pm - 10:30 pm
ISP
-
SFO
10h 35m
2 stops
Southwest Logo
6:10 pm - 8:20 am
SFO
-
ISP
11h 10m
2 stops
$425Southwest
Wed, Jul 22 - Thu, Jul 23
Southwest Logo
6:00 am - 1:50 pm
ISP
-
SFO
10h 50m
1 stop
Southwest Logo
9:25 pm - 11:50 am
SFO
-
ISP
11h 25m
1 stop
$429Southwest
Fri, Dec 4 - Mon, Dec 7
Southwest Logo
2:55 pm - 10:30 pm
ISP
-
SFO
10h 35m
2 stops
Southwest Logo
9:10 pm - 8:20 am
SFO
-
ISP
8h 10m
1 stop
$430Southwest
Wed, Jul 22 - Thu, Jul 23
Southwest Logo
6:00 am - 2:00 pm
ISP
-
SFO
11h 00m
2 stops
Southwest Logo
9:25 pm - 11:50 am
SFO
-
ISP
11h 25m
1 stop
$435Southwest
Fri, Dec 4 - Mon, Dec 7
Southwest Logo
12:25 pm - 7:50 pm
ISP
-
SFO
10h 25m
1 stop
Southwest Logo
9:10 pm - 8:20 am
SFO
-
ISP
8h 10m
1 stop
$477Southwest
Wed, Jul 22 - Thu, Jul 23
Southwest Logo
12:30 pm - 8:25 pm
ISP
-
SFO
10h 55m
2 stops
Southwest Logo
11:40 pm - 11:50 am
SFO
-
ISP
9h 10m
2 stops
$513Southwest
Thu, Jul 23 - Sun, Jul 26
Southwest Logo
6:00 am - 3:25 pm
ISP
-
SFO
12h 25m
1 stop
Southwest Logo
10:50 pm - 11:50 am
SFO
-
ISP
10h 00m
2 stops
$538Southwest
Sun, Jul 19 - Sun, Jul 26
Southwest Logo
2:55 pm - 7:50 pm
ISP
-
SFO
7h 55m
1 stop
Southwest Logo
9:30 pm - 11:45 am
SFO
-
ISP
11h 15m
1 stop
$544Southwest
Tue, Jul 14 - Sat, Jul 18

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Southwest flights from Islip, New York to San Francisco

Our best Southwest deals on Islip, New York to San Francisco flight tickets
Southwest
Nov 4
ISP6:00 amIslip Long Island
10h 50m
1 stop
SFO1:50 pmSan Francisco
Nov 9
SFO9:25 pmSan Francisco
11h 25m
1 stop
ISP11:50 amIslip Long Island
$377
Southwest
Nov 4
ISP6:00 amIslip Long Island
11h 55m
2 stops
SFO2:55 pmSan Francisco
Nov 9
SFO9:25 pmSan Francisco
11h 25m
1 stop
ISP11:50 amIslip Long Island
$383
Southwest
Jul 22
ISP2:55 pmIslip Long Island
10h 35m
2 stops
SFO10:30 pmSan Francisco
Jul 23
SFO6:10 pmSan Francisco
11h 10m
2 stops
ISP8:20 amIslip Long Island
$425

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
Aug 30
ISP7:49 pmIslip Long Island
18h 44m
3 stops
SFO11:33 amSan Francisco
Sep 10
SFO12:46 pmSan Francisco
17h 13m
2 stops
ISP8:59 amIslip Long Island
$744
Breeze Airways
Sep 4
ISP8:43 pmIslip Long Island
17h 54m
2 stops
SFO11:37 amSan Francisco
Sep 7
SFO12:18 pmSan Francisco
19h 58m
3 stops
ISP11:16 amIslip Long Island
$764
Breeze Airways
Aug 21
ISP8:43 pmIslip Long Island
17h 54m
2 stops
SFO11:37 amSan Francisco
Aug 24
SFO12:18 pmSan Francisco
19h 58m
3 stops
ISP11:16 amIslip Long Island
$774

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 June 23, 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

Cheapest round-trip

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Wed 11/4

6:00 am-1:50 pm

1 stop10h 50m

San Francisco

Mon 11/9

9:25 pm-11:50 am

1 stop11h 25m

$377

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Wed 11/4

6:00 am-2:55 pm

2 stops11h 55m

San Francisco

Mon 11/9

9:25 pm-11:50 am

1 stop11h 25m

$383

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Wed 7/22

2:55 pm-10:30 pm

2 stops10h 35m

San Francisco

Thu 7/23

6:10 pm-8:20 am

2 stops11h 10m

$425

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Fri 12/4

6:00 am-1:50 pm

1 stop10h 50m

San Francisco

Mon 12/7

9:25 pm-11:50 am

1 stop11h 25m

$429

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Wed 7/22

2:55 pm-10:30 pm

2 stops10h 35m

San Francisco

Thu 7/23

9:10 pm-8:20 am

1 stop8h 10m

$430

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Fri 12/4

6:00 am-2:00 pm

2 stops11h 00m

San Francisco

Mon 12/7

9:25 pm-11:50 am

1 stop11h 25m

$435
Quickest round-trip

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Wed 7/22

12:25 pm-7:50 pm

1 stop10h 25m

San Francisco

Thu 7/23

9:10 pm-8:20 am

1 stop8h 10m

$477

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Thu 7/23

12:30 pm-8:25 pm

2 stops10h 55m

San Francisco

Sun 7/26

11:40 pm-11:50 am

2 stops9h 10m

$513

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Sun 7/19

6:00 am-3:25 pm

1 stop12h 25m

San Francisco

Sun 7/26

10:50 pm-11:50 am

2 stops10h 00m

$538

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Tue 7/14

2:55 pm-7:50 pm

1 stop7h 55m

San Francisco

Sat 7/18

9:30 pm-11:45 am

1 stop11h 15m

$544

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 $436. The most expensive day to fly to San Francisco is Sunday, with ticket prices averaging around $615.

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 $439. Flights in the afternoon are often more expensive with an average ticket price of $533.

Can stopping save me money on Islip, New York to San Francisco flights?

You could potentially save up to 63% on your flight if you consider stops on a Islip, New York to San Francisco flight.

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

Frequently asked questions about flying from Islip, New York to San Francisco

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

    A flight from Islip Long Island to San Francisco will travel around 2603.4 mi. Flights usually cover this in 8h 00m, 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
Bodega Bay
Sonoma
Fremont
Hayward
Roseville
South San Francisco
Walnut Creek
Berkeley
Santa Clara
Vallejo
Salinas
Sunnyvale
Big Sur
Daly City
Burlingame
Milpitas
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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