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Cheap flights from Islip, New York to San Francisco from $149

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 8/31. 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
6:05 am - 11:35 am
ISP
-
SFO
8h 30m
1 stop
Southwest Logo
10:30 pm - 10:15 am
SFO
-
ISP
8h 45m
1 stop
$311Southwest
tis, aug 25 - tis, sep 1
Southwest Logo
6:05 am - 1:50 pm
ISP
-
SFO
10h 45m
2 stops
Southwest Logo
10:30 pm - 10:15 am
SFO
-
ISP
8h 45m
1 stop
$316Southwest
tis, aug 11 - tis, aug 18
Southwest Logo
6:05 am - 1:50 pm
ISP
-
SFO
10h 45m
2 stops
Southwest Logo
7:10 pm - 10:15 am
SFO
-
ISP
12h 05m
2 stops
$321Southwest
tis, aug 11 - tis, aug 18
Southwest Logo
6:05 am - 11:35 am
ISP
-
SFO
8h 30m
1 stop
Southwest Logo
10:30 pm - 10:15 am
SFO
-
ISP
8h 45m
1 stop
$399Southwest
tis, aug 4 - tis, aug 18
Southwest Logo
6:05 am - 11:35 am
ISP
-
SFO
8h 30m
1 stop
Southwest Logo
7:10 pm - 10:15 am
SFO
-
ISP
12h 05m
2 stops
$404Southwest
tis, aug 4 - tis, aug 18
Southwest Logo
6:10 am - 1:00 pm
ISP
-
SFO
9h 50m
1 stop
Southwest Logo
7:10 pm - 10:15 am
SFO
-
ISP
12h 05m
2 stops
$407Southwest
tors, aug 13 - mån, aug 17
Southwest Logo
12:35 pm - 7:05 pm
ISP
-
SFO
9h 30m
2 stops
Southwest Logo
7:25 pm - 10:15 am
SFO
-
ISP
11h 50m
2 stops
$412Southwest
tors, aug 13 - mån, aug 17
Southwest Logo
2:55 pm - 10:30 pm
ISP
-
SFO
10h 35m
2 stops
Southwest Logo
10:30 pm - 10:15 am
SFO
-
ISP
8h 45m
1 stop
$430Southwest
ons, jul 29 - tis, aug 4
Southwest Logo
3:20 pm - 10:05 pm
ISP
-
SFO
9h 45m
2 stops
Southwest Logo
7:10 pm - 10:15 am
SFO
-
ISP
12h 05m
2 stops
$435Southwest
tis, aug 4 - tis, aug 18
Southwest Logo
12:25 pm - 7:50 pm
ISP
-
SFO
10h 25m
1 stop
Southwest Logo
10:30 pm - 10:15 am
SFO
-
ISP
8h 45m
1 stop
$440Southwest
ons, jul 29 - tis, aug 4

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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
Aug 25
ISP6:05 amIslip Long Island
8h 30m
1 stop
SFO11:35 amSan Francisco
Sep 1
SFO10:30 pmSan Francisco
8h 45m
1 stop
ISP10:15 amIslip Long Island
$311
Southwest
Aug 11
ISP6:05 amIslip Long Island
10h 45m
2 stops
SFO1:50 pmSan Francisco
Aug 18
SFO10:30 pmSan Francisco
8h 45m
1 stop
ISP10:15 amIslip Long Island
$316
Southwest
Aug 11
ISP6:05 amIslip Long Island
10h 45m
2 stops
SFO1:50 pmSan Francisco
Aug 18
SFO7:10 pmSan Francisco
12h 05m
2 stops
ISP10:15 amIslip Long Island
$321

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 25
ISP11:56 amIslip Long Island
26h 41m
3 stops
SFO11:37 amSan Francisco
Sep 1
SFO12:47 pmSan Francisco
21h 46m
2 stops
ISP1:33 pmIslip Long Island
$714
Breeze Airways
Aug 13
ISP7:49 pmIslip Long Island
18h 44m
3 stops
SFO11:33 amSan Francisco
Aug 17
SFO12:18 pmSan Francisco
19h 58m
3 stops
ISP11:16 amIslip Long Island
$730
Breeze Airways
Aug 25
ISP11:56 amIslip Long Island
26h 41m
3 stops
SFO11:37 amSan Francisco
Sep 1
SFO12:47 pmSan Francisco
21h 46m
2 stops
ISP1:33 pmIslip Long Island
$734

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 juli 2, 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
Quickest round-trip

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

tis 8/25

6:05 am-11:35 am

1 stop8h 30m

San Francisco

tis 9/1

10:30 pm-10:15 am

1 stop8h 45m

$311

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

tis 8/11

6:05 am-1:50 pm

2 stops10h 45m

San Francisco

tis 8/18

10:30 pm-10:15 am

1 stop8h 45m

$316

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

tis 8/11

6:05 am-1:50 pm

2 stops10h 45m

San Francisco

tis 8/18

7:10 pm-10:15 am

2 stops12h 05m

$321

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

tis 8/4

6:05 am-11:35 am

1 stop8h 30m

San Francisco

tis 8/18

10:30 pm-10:15 am

1 stop8h 45m

$399

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

tis 8/4

6:05 am-11:35 am

1 stop8h 30m

San Francisco

tis 8/18

7:10 pm-10:15 am

2 stops12h 05m

$404

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

tors 8/13

6:10 am-1:00 pm

1 stop9h 50m

San Francisco

mån 8/17

7:10 pm-10:15 am

2 stops12h 05m

$407

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

tors 8/13

12:35 pm-7:05 pm

2 stops9h 30m

San Francisco

mån 8/17

7:25 pm-10:15 am

2 stops11h 50m

$412

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

ons 7/29

2:55 pm-10:30 pm

2 stops10h 35m

San Francisco

tis 8/4

10:30 pm-10:15 am

1 stop8h 45m

$430

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

tis 8/4

3:20 pm-10:05 pm

2 stops9h 45m

San Francisco

tis 8/18

7:10 pm-10:15 am

2 stops12h 05m

$435

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

ons 7/29

12:25 pm-7:50 pm

1 stop10h 25m

San Francisco

tis 8/4

10:30 pm-10:15 am

1 stop8h 45m

$440

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 $438. The most expensive day to fly to San Francisco is Sunday, with ticket prices averaging around $622.

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 $446. Flights in the afternoon are often more expensive with an average ticket price of $536.

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

You could potentially save up to 55% 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

9h 50m

Direct flights

None
The fastest flight from Islip, New York to San Francisco takes 9h 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

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 9h 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
Bodega Bay
South San Francisco
Sonoma
Fremont
Hayward
Roseville
Walnut Creek
Santa Clara
Berkeley
Vallejo
Salinas
Sunnyvale
Big Sur
Burlingame
Daly City
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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