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$150+ Cheap flights from Islip, NY to San Francisco (ISP - SFO)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/11. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — SFO
Jul 5 — Jul 121
Sat 7/5
Sat 7/12
1 adult, Economy
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Cheap flight deals from Islip to San Francisco

Discover tips and strategies to find the most affordable flight options for your journey from Islip (ISP) to San Francisco (SFO). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated June 30, 2025.

Round-trip from

$323
(JetBlue)

One-way from

$150
(JetBlue)

Popular in

December

Cheapest in

February

Average price

$497
From Islip Long Island to San Francisco
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One-way flight from Islip Long Island to San Francisco
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Highest demand for flights based on searches. 5% potential increase in price ($24 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($12 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Find flight deals from Islip to San Francisco

Cheapest flights from Islip to San Francisco
Explore the most affordable flight options available from Islip to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 30, 2025.

This JetBlue deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/311:35 amISP - SFO
1 stop10h 45mJetBlue
Sun 10/510:15 pmSFO - ISP
1 stop9h 35mJetBlue
Deal found 6/30$323
This Frontier deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/266:05 amISP - SFO
2 stops19h 28mFrontier
Mon 9/810:45 amSFO - ISP
2 stops20h 55mFrontier
Deal found 6/28$326
This Southwest deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/223:05 pmISP - SFO
1 stop8h 05mSouthwest
Mon 8/256:20 amSFO - ISP
2 stops13h 35mSouthwest
Deal found 6/28$383
This FlightHub deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/221:11 pmISP - SFO
2 stops34h 52mMultiple Airlines
Mon 8/2512:29 pmSFO - ISP
3 stops21h 46mMultiple Airlines
Deal found 6/28$554
This KAYAK deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/2510:36 amISP - SFO
2 stops28h 12mBreeze Airways
Sat 9/612:39 pmSFO - ISP
1 stop22h 00mBreeze Airways
Deal found 6/28$701

Cheapflights Fare Finder

Customize your flight search to find flights from Islip 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, Cheapflights users made 2,558,603 searches. Data last updated June 30, 2025.
Use the filters below to find and compare flights from Islip to San Francisco that are best for you.

Fly from

Islip

Fly to

San Francisco

Route

Depart

Return

Price

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Fri 10/3

11:35 am-7:20 pm

1 stop10h 45m

San Francisco

Sun 10/5

10:15 pm-10:50 am

1 stop9h 35m

$323

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Tue 8/26

6:05 am-10:33 pm

2 stops19h 28m

San Francisco

Mon 9/8

10:45 am-10:40 am

2 stops20h 55m

$326

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Fri 8/22

3:05 pm-8:10 pm

1 stop8h 05m

San Francisco

Mon 8/25

6:20 am-10:55 pm

2 stops13h 35m

$383

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Fri 8/22

1:11 pm-9:03 pm

2 stops34h 52m

San Francisco

Mon 8/25

12:29 pm-1:15 pm

3 stops21h 46m

$554

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Mon 8/25

10:36 am-11:48 am

2 stops28h 12m

San Francisco

Sat 9/6

12:39 pm-1:39 pm

1 stop22h 00m

$701

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Sat 10/11

11:35 am-7:20 pm

1 stop10h 45m

$150

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Wed 7/23

8:37 pm-10:25 am

1 stop16h 48m

$162

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Tue 10/7

1:10 pm-9:20 pm

2 stops11h 10m

$176

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Sun 9/7

7:36 pm-12:02 pm

3 stops19h 26m

$321

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Tue 10/7

7:30 am-7:05 pm

3 stops14h 35m

$423

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/29

Best time to book a flight from Islip to San Francisco

Have a flexible travel schedule? Discover the best time to fly to San Francisco from Islip with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Islip to San Francisco

What is the cheapest month to book a flight from Islip, New York to San Francisco?

Currently, January is the cheapest month in which you can book a flight from Islip, New York to San Francisco (average of $276). Flying from Islip, New York to San Francisco in June is currently the most expensive (average of $360). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing San Francisco

Get insights into the airlines that provide service to San Francisco. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to San Francisco. Reviews last updated June 30, 2025.
Read through reviews of airlines operating flights from Islip to San Francisco, such as Breeze Airways, Southwest, and JetBlue. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Breeze Airways
8.1
Very good
182 reviews

Overall

8.1

Comfort

8.2

Boarding

8.4

Entertainment

6.6

Crew

8.8

Food

6.8

Reviews

1 / 11
10.0
Excellent

Dena,Dec 2024

LAS - BDL

It was comfortable and the crew was great! A few free snacks offered would be nice!
Breeze Airways
8.1
Very good
182 reviews
Breeze Airways
8.1
Very good
182 reviews

Overall

8.1

Comfort

8.2

Boarding

8.4

Entertainment

6.6

Crew

8.8

Food

6.8

Reviews

1 / 11
10.0
Excellent

Dena,Dec 2024

LAS - BDL

It was comfortable and the crew was great! A few free snacks offered would be nice!
Southwest
8.0
Very good
4,278 reviews
Breeze Airways
8.1
Very good
182 reviews

Overall

8.1

Comfort

8.2

Boarding

8.4

Entertainment

6.6

Crew

8.8

Food

6.8

Reviews

1 / 11
10.0
Excellent

Dena,Dec 2024

LAS - BDL

It was comfortable and the crew was great! A few free snacks offered would be nice!
JetBlue
7.3
Good
2,920 reviews
Breeze Airways
8.1
Very good
182 reviews

Overall

8.1

Comfort

8.2

Boarding

8.4

Entertainment

6.6

Crew

8.8

Food

6.8

Reviews

1 / 11
10.0
Excellent

Dena,Dec 2024

LAS - BDL

It was comfortable and the crew was great! A few free snacks offered would be nice!
Frontier
5.9
Fair
3,289 reviews
Breeze Airways
8.1
Very good
182 reviews

Overall

8.1

Comfort

8.2

Boarding

8.4

Entertainment

6.6

Crew

8.8

Food

6.8

Reviews

1 / 11
10.0
Excellent

Dena,Dec 2024

LAS - BDL

It was comfortable and the crew was great! A few free snacks offered would be nice!

Related info for your journey

Find useful and relevant information for your journey from Islip to San Francisco. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What are the cheapest airlines to fly from Islip, New York to San Francisco one-way?

    For one-way options, check prices for JetBlue. According to our data, you can fly for as low as $150. Users have also found prices from $162 and $176 on Frontier and Southwest, respectively.

  • Can I find deals for flights from Islip to San Francisco that include hotel bookings?

    Yes. In addition to deals on Islip to San Francisco flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Islip to San Francisco?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Islip to San Francisco.

  • Can I find deals for business class flights from Islip to San Francisco?

    Yes. Cheapflights offers flight deals from Islip to San Francisco by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Islip, New York to San Francisco?

    Currently, January is the cheapest month in which you can book a flight from Islip, New York to San Francisco (average of $276). Flying from Islip, New York to San Francisco in June is currently the most expensive (average of $360). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Islip?

Book flights to Islip if you plan to visit one of these locations
Roseville
Mountain View
South San Francisco
Livermore
Santa Cruz
Turlock
Manteca
Watsonville
Fairfield
Antioch
Hollister
Milpitas
Sunnyvale
Newark
Alameda
Hayward
Daly City
Campbell
Capitola
Foster City

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