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Cheap flights from Islip, New York to San Francisco from $131

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 8/20. 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
$270Frontier
Thu, Aug 20 - Tue, Aug 25
Frontier Logo
4:41 pm - 10:29 am
ISP
-
SFO
20h 48m
1 stop
Frontier Logo
8:51 pm - 10:03 am
SFO
-
ISP
10h 12m
1 stop
$355Frontier
Tue, Sep 1 - Fri, Sep 4
Southwest Logo
6:05 am - 11:35 am
ISP
-
SFO
8h 30m
1 stop
Southwest Logo
10:30 pm - 9:55 am
SFO
-
ISP
8h 25m
1 stop
$397Southwest
Tue, Sep 22 - Sat, Sep 26
Southwest Logo
6:05 am - 1:50 pm
ISP
-
SFO
10h 45m
2 stops
Southwest Logo
10:30 pm - 9:55 am
SFO
-
ISP
8h 25m
1 stop
$402Southwest
Tue, Sep 22 - Sat, Sep 26
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
$415Frontier
Fri, Aug 21 - Fri, Aug 28
Southwest Logo
3:20 pm - 11:05 pm
ISP
-
SFO
10h 45m
2 stops
Southwest Logo
6:00 am - 8:45 pm
SFO
-
ISP
11h 45m
2 stops
$441Southwest
Tue, Sep 22 - Sat, Sep 26
Southwest Logo
2:55 pm - 7:50 pm
ISP
-
SFO
7h 55m
1 stop
Southwest Logo
11:40 pm - 2:55 pm
SFO
-
ISP
12h 15m
2 stops
$472Southwest
Tue, Jul 14 - Sat, Jul 25
Southwest Logo
6:00 am - 1:40 pm
ISP
-
SFO
10h 40m
2 stops
Southwest Logo
6:45 pm - 8:20 am
SFO
-
ISP
10h 35m
2 stops
$477Southwest
Wed, Jun 10 - Thu, Jun 11
Southwest Logo
2:55 pm - 7:50 pm
ISP
-
SFO
7h 55m
1 stop
Southwest Logo
6:45 pm - 8:20 am
SFO
-
ISP
10h 35m
2 stops
$482Southwest
Wed, Jun 10 - Thu, Jun 11
Southwest Logo
4:30 pm - 11:20 pm
ISP
-
SFO
9h 50m
1 stop
Southwest Logo
6:45 pm - 8:05 am
SFO
-
ISP
10h 20m
2 stops
$485Southwest
Mon, Jun 1 - Mon, Jun 8

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 17
ISP8:43 pmIslip Long Island
18h 19m
2 stops
SFO12:02 pmSan Francisco
Aug 26
SFO12:22 pmSan Francisco
26h 44m
1 stop
ISP6:06 pmIslip Long Island
$749
Breeze Airways
Aug 17
ISP8:43 pmIslip Long Island
18h 19m
2 stops
SFO12:02 pmSan Francisco
Aug 26
SFO12:22 pmSan Francisco
27h 47m
3 stops
ISP7:09 pmIslip Long Island
$754
Breeze Airways
Aug 26
ISP2:33 pmIslip Long Island
24h 29m
2 stops
SFO12:02 pmSan Francisco
Aug 29
SFO12:22 pmSan Francisco
26h 44m
1 stop
ISP6:06 pmIslip Long Island
$769

JetBlue flights from Islip, New York to San Francisco

Our best JetBlue deals on Islip, New York to San Francisco flight tickets
JetBlue
Aug 27
ISP5:00 pmIslip Long Island
9h 50m
1 stop
SFO11:50 pmSan Francisco
Aug 30
SFO10:57 amSan Francisco
9h 30m
1 stop
ISP11:27 pmIslip Long Island
$638
JetBlue
Jul 9
ISP5:00 pmIslip Long Island
9h 50m
1 stop
SFO11:50 pmSan Francisco
Jul 12
SFO10:57 amSan Francisco
9h 30m
1 stop
ISP11:27 pmIslip Long Island
$718
JetBlue
Jul 28
ISP5:00 pmIslip Long Island
9h 50m
1 stop
SFO11:50 pmSan Francisco
Aug 16
SFO10:57 amSan Francisco
9h 30m
1 stop
ISP11:27 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 May 10, 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

Thu 8/20

10:48 am-10:29 am

1 stop26h 41m

San Francisco

Tue 8/25

8:51 pm-10:03 am

1 stop10h 12m

$270

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Tue 9/1

4:41 pm-10:29 am

1 stop20h 48m

San Francisco

Fri 9/4

8:51 pm-10:03 am

1 stop10h 12m

$355
Quickest round-trip

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Tue 9/22

6:05 am-11:35 am

1 stop8h 30m

San Francisco

Sat 9/26

10:30 pm-9:55 am

1 stop8h 25m

$397

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Tue 9/22

6:05 am-1:50 pm

2 stops10h 45m

San Francisco

Sat 9/26

10:30 pm-9:55 am

1 stop8h 25m

$402

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Fri 8/21

10:48 am-10:29 am

1 stop26h 41m

San Francisco

Fri 8/28

8:51 pm-10:03 am

1 stop10h 12m

$415

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Tue 9/22

3:20 pm-11:05 pm

2 stops10h 45m

San Francisco

Sat 9/26

6:00 am-8:45 pm

2 stops11h 45m

$441

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Tue 7/14

2:55 pm-7:50 pm

1 stop7h 55m

San Francisco

Sat 7/25

11:40 pm-2:55 pm

2 stops12h 15m

$472

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Wed 6/10

6:00 am-1:40 pm

2 stops10h 40m

San Francisco

Thu 6/11

6:45 pm-8:20 am

2 stops10h 35m

$477

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Wed 6/10

2:55 pm-7:50 pm

1 stop7h 55m

San Francisco

Thu 6/11

6:45 pm-8:20 am

2 stops10h 35m

$482

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Mon 6/1

4:30 pm-11:20 pm

1 stop9h 50m

San Francisco

Mon 6/8

6:45 pm-8:05 am

2 stops10h 20m

$485

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

7h 55m

Direct flights

None
The fastest flight from Islip, New York to San Francisco takes 7h 55m
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 7h 55m, 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
Berkeley
Hayward
Santa Clara
Fremont
Vallejo
Big Sur
Calistoga
Sunnyvale
South San Francisco
Salinas
Daly City
Half Moon Bay
Pacific Grove

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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