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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 6/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
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.
Frontier Logo
10:48 am - 10:29 am
ISP
-
SFO
26h 41m
1 stop
Frontier Logo
8:51 pm - 3:56 pm
SFO
-
ISP
16h 05m
1 stop
$355Frontier
Wed, Aug 19 - Mon, Aug 24
Southwest Logo
4:10 pm - 9:25 pm
ISP
-
SFO
8h 15m
1 stop
Southwest Logo
11:40 pm - 1:45 pm
SFO
-
ISP
11h 05m
2 stops
$388Southwest
Tue, Jun 2 - Tue, Jun 9
Southwest Logo
4:10 pm - 11:15 pm
ISP
-
SFO
10h 05m
2 stops
Southwest Logo
11:40 pm - 1:45 pm
SFO
-
ISP
11h 05m
2 stops
$393Southwest
Tue, Jun 2 - Tue, Jun 9
Southwest Logo
12:30 pm - 7:55 pm
ISP
-
SFO
10h 25m
2 stops
Southwest Logo
11:25 pm - 1:50 pm
SFO
-
ISP
11h 25m
2 stops
$409Southwest
Wed, May 27 - Mon, Jun 1
Southwest Logo
4:10 pm - 11:15 pm
ISP
-
SFO
10h 05m
2 stops
Southwest Logo
9:15 pm - 11:55 am
SFO
-
ISP
11h 40m
1 stop
$410Southwest
Wed, May 27 - Mon, Jun 1
Southwest Logo
4:10 pm - 9:25 pm
ISP
-
SFO
8h 15m
1 stop
Southwest Logo
9:10 pm - 8:05 am
SFO
-
ISP
7h 55m
1 stop
$425Southwest
Tue, Jun 2 - Tue, Jun 9
Southwest Logo
4:30 pm - 11:20 pm
ISP
-
SFO
9h 50m
1 stop
Southwest Logo
6:50 pm - 8:20 am
SFO
-
ISP
10h 30m
2 stops
$448Southwest
Mon, Jun 1 - Sun, Jun 7
Southwest Logo
12:25 pm - 7:50 pm
ISP
-
SFO
10h 25m
1 stop
Southwest Logo
9:10 pm - 8:05 am
SFO
-
ISP
7h 55m
1 stop
$467Southwest
Tue, Jul 14 - Mon, Jul 20
Southwest Logo
12:25 pm - 7:50 pm
ISP
-
SFO
10h 25m
1 stop
Southwest Logo
11:40 pm - 1:45 pm
SFO
-
ISP
11h 05m
2 stops
$472Southwest
Tue, Jul 14 - Mon, Jul 20
Southwest Logo
4:10 pm - 9:25 pm
ISP
-
SFO
8h 15m
1 stop
Southwest Logo
9:15 pm - 1:50 pm
SFO
-
ISP
13h 35m
1 stop
$474Southwest
Wed, May 27 - Mon, Jun 1

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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 2
ISP7:49 pmIslip Long Island
18h 44m
3 stops
SFO11:33 amSan Francisco
Aug 13
SFO12:47 pmSan Francisco
28h 16m
2 stops
ISP8:03 pmIslip Long Island
$747
Breeze Airways
Oct 16
ISP9:39 amIslip Long Island
29h 12m
2 stops
SFO11:51 amSan Francisco
Oct 21
SFO12:36 pmSan Francisco
25h 50m
1 stop
ISP5:26 pmIslip Long Island
$759
Breeze Airways
May 26
ISP11:56 amIslip Long Island
26h 41m
3 stops
SFO11:37 amSan Francisco
Jun 6
SFO12:22 pmSan Francisco
26h 44m
1 stop
ISP6:06 pmIslip Long Island
$764

Southwest flights from Islip, New York to San Francisco

Our best Southwest deals on Islip, New York to San Francisco flight tickets
Southwest
Jun 2
ISP4:10 pmIslip Long Island
8h 15m
1 stop
SFO9:25 pmSan Francisco
Jun 9
SFO11:40 pmSan Francisco
11h 05m
2 stops
ISP1:45 pmIslip Long Island
$388
Southwest
Jun 2
ISP4:10 pmIslip Long Island
10h 05m
2 stops
SFO11:15 pmSan Francisco
Jun 9
SFO11:40 pmSan Francisco
11h 05m
2 stops
ISP1:45 pmIslip Long Island
$393
Southwest
May 27
ISP12:30 pmIslip Long Island
10h 25m
2 stops
SFO7:55 pmSan Francisco
Jun 1
SFO10:55 pmSan Francisco
10h 00m
2 stops
ISP11:55 amIslip Long Island
$409

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 May 4, 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 8/19

10:48 am-10:29 am

1 stop26h 41m

San Francisco

Mon 8/24

8:51 pm-3:56 pm

1 stop16h 05m

$355

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Tue 6/2

4:10 pm-9:25 pm

1 stop8h 15m

San Francisco

Tue 6/9

11:40 pm-1:45 pm

2 stops11h 05m

$388

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Tue 6/2

4:10 pm-11:15 pm

2 stops10h 05m

San Francisco

Tue 6/9

11:40 pm-1:45 pm

2 stops11h 05m

$393

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Wed 5/27

12:30 pm-7:55 pm

2 stops10h 25m

San Francisco

Mon 6/1

11:25 pm-1:50 pm

2 stops11h 25m

$409

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Wed 5/27

4:10 pm-11:15 pm

2 stops10h 05m

San Francisco

Mon 6/1

9:15 pm-11:55 am

1 stop11h 40m

$410
Quickest round-trip

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Tue 6/2

4:10 pm-9:25 pm

1 stop8h 15m

San Francisco

Tue 6/9

9:10 pm-8:05 am

1 stop7h 55m

$425

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Mon 6/1

4:30 pm-11:20 pm

1 stop9h 50m

San Francisco

Sun 6/7

6:50 pm-8:20 am

2 stops10h 30m

$448

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Tue 7/14

12:25 pm-7:50 pm

1 stop10h 25m

San Francisco

Mon 7/20

9:10 pm-8:05 am

1 stop7h 55m

$467

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Tue 7/14

12:25 pm-7:50 pm

1 stop10h 25m

San Francisco

Mon 7/20

11:40 pm-1:45 pm

2 stops11h 05m

$472

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Wed 5/27

4:10 pm-9:25 pm

1 stop8h 15m

San Francisco

Mon 6/1

9:15 pm-1:50 pm

1 stop13h 35m

$474

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 $419. The most expensive day to fly to San Francisco is Sunday, with ticket prices averaging around $595.

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 $414. Flights in the afternoon are often more expensive with an average ticket price of $506.

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

You could potentially save up to 13% 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 15m

Direct flights

None
The fastest flight from Islip, New York to San Francisco takes 8h 15m
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 15m, 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
Walnut Creek
Roseville
Hayward
Berkeley
Santa Clara
Vallejo
Fremont
Big Sur
Calistoga
Daly City
South San Francisco
Pacific Grove
Sunnyvale
Salinas
Milpitas

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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