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Cheap flights from Islip, New York to San Francisco from $198

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 8/25. 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
10:48 am - 10:29 am
ISP
-
SFO
26h 41m
1 stop
Frontier Logo
8:51 pm - 10:03 am
SFO
-
ISP
10h 12m
1 stop
$430Frontier
Wed, Aug 19 - Sun, Aug 23
Southwest Logo
4:40 pm - 11:20 pm
ISP
-
SFO
9h 40m
2 stops
Southwest Logo
9:10 pm - 8:20 am
SFO
-
ISP
8h 10m
1 stop
$472Southwest
Wed, Jul 15 - Wed, Jul 22
Southwest Logo
2:55 pm - 10:30 pm
ISP
-
SFO
10h 35m
2 stops
Southwest Logo
10:50 pm - 11:50 am
SFO
-
ISP
10h 00m
2 stops
$477Southwest
Wed, Jul 8 - Wed, Jul 15
Southwest Logo
2:55 pm - 7:50 pm
ISP
-
SFO
7h 55m
1 stop
Southwest Logo
9:10 pm - 8:20 am
SFO
-
ISP
8h 10m
1 stop
$503Southwest
Wed, Jul 15 - Wed, Jul 22
Southwest Logo
2:55 pm - 10:30 pm
ISP
-
SFO
10h 35m
2 stops
Southwest Logo
8:55 am - 10:40 pm
SFO
-
ISP
10h 45m
2 stops
$513Southwest
Wed, Jul 15 - Wed, Jul 22
Southwest Logo
2:55 pm - 7:50 pm
ISP
-
SFO
7h 55m
1 stop
Southwest Logo
9:10 pm - 8:20 am
SFO
-
ISP
8h 10m
1 stop
$518Southwest
Wed, Jul 15 - Wed, Jul 22
Southwest Logo
12:30 pm - 5:30 pm
ISP
-
SFO
8h 00m
1 stop
Southwest Logo
6:45 pm - 8:05 am
SFO
-
ISP
10h 20m
2 stops
$523Southwest
Fri, Jun 26 - Mon, Jun 29
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
$527Southwest
Wed, Jul 8 - Wed, Jul 15
Southwest Logo
2:55 pm - 10:30 pm
ISP
-
SFO
10h 35m
2 stops
Southwest Logo
11:40 pm - 2:30 pm
SFO
-
ISP
11h 50m
2 stops
$528Southwest
Wed, Jul 15 - Wed, Jul 22
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
$545Frontier
Wed, Aug 19 - Mon, Aug 24

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 28
ISP8:43 pmIslip Long Island
17h 54m
2 stops
SFO11:37 amSan Francisco
Aug 31
SFO12:18 pmSan Francisco
19h 58m
3 stops
ISP11:16 amIslip Long Island
$814
Breeze Airways
Aug 27
ISP7:49 pmIslip Long Island
18h 44m
3 stops
SFO11:33 amSan Francisco
Aug 31
SFO12:18 pmSan Francisco
19h 58m
3 stops
ISP11:16 amIslip Long Island
$820
Breeze Airways
Jun 12
ISP8:43 pmIslip Long Island
17h 54m
2 stops
SFO11:37 amSan Francisco
Jun 23
SFO12:47 pmSan Francisco
21h 46m
2 stops
ISP1:33 pmIslip Long Island
$839

Frontier flights from Islip, New York to San Francisco

Our best Frontier deals on Islip, New York to San Francisco flight tickets
Frontier
Aug 19
ISP10:48 amIslip Long Island
26h 41m
1 stop
SFO10:29 amSan Francisco
Aug 23
SFO8:51 pmSan Francisco
10h 12m
1 stop
ISP10:03 amIslip Long Island
$430
Frontier
Aug 19
ISP10:48 amIslip Long Island
26h 41m
1 stop
SFO10:29 amSan Francisco
Aug 24
SFO8:51 pmSan Francisco
16h 05m
1 stop
ISP3:56 pmIslip Long Island
$545
Frontier
Jun 4
ISP11:00 amIslip Long Island
15h 04m
2 stops
SFO11:04 pmSan Francisco
Jun 5
SFO12:52 pmSan Francisco
18h 23m
2 stops
ISP10:15 amIslip Long Island
$775

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 27, 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

Sun 8/23

8:51 pm-10:03 am

1 stop10h 12m

$430

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Wed 7/15

4:40 pm-11:20 pm

2 stops9h 40m

San Francisco

Wed 7/22

9:10 pm-8:20 am

1 stop8h 10m

$472

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Wed 7/8

2:55 pm-10:30 pm

2 stops10h 35m

San Francisco

Wed 7/15

10:50 pm-11:50 am

2 stops10h 00m

$477
Quickest round-trip

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Wed 7/15

2:55 pm-7:50 pm

1 stop7h 55m

San Francisco

Wed 7/22

9:10 pm-8:20 am

1 stop8h 10m

$503

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Wed 7/15

2:55 pm-10:30 pm

2 stops10h 35m

San Francisco

Wed 7/22

8:55 am-10:40 pm

2 stops10h 45m

$513

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Wed 7/15

2:55 pm-7:50 pm

1 stop7h 55m

San Francisco

Wed 7/22

9:10 pm-8:20 am

1 stop8h 10m

$518

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Fri 6/26

12:30 pm-5:30 pm

1 stop8h 00m

San Francisco

Mon 6/29

6:45 pm-8:05 am

2 stops10h 20m

$523

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Wed 7/8

12:25 pm-7:50 pm

1 stop10h 25m

San Francisco

Wed 7/15

9:10 pm-8:20 am

1 stop8h 10m

$527

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Wed 7/15

2:55 pm-10:30 pm

2 stops10h 35m

San Francisco

Wed 7/22

11:40 pm-2:30 pm

2 stops11h 50m

$528

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

$545

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 $426. The most expensive day to fly to San Francisco is Sunday, with ticket prices averaging around $607.

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 $426. Flights in the afternoon are often more expensive with an average ticket price of $521.

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

You could potentially save up to 53% 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

15h 20m

Direct flights

None
The fastest flight from Islip, New York to San Francisco takes 15h 20m
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 15h 20m, 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
Hayward
Walnut Creek
Bodega Bay
Roseville
Santa Clara
Berkeley
Fremont
Vallejo
Sunnyvale
Big Sur
South San Francisco
Calistoga
Daly City
Pacific Grove
Salinas
Burlingame

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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