Menu

Cheap flights from Islip to San Francisco (ISP - SFO)

Know your dates, get live prices in seconds:

From
To
Depart
Return
Any month
Compare vs. Cheapflights |
From
To
Depart
Depart
Time
Anytime
From
To
Depart
Depart
Time
Anytime
From
To
Depart
Depart
Time
Anytime
From
To
Depart
Depart
Time
Anytime
From
To
Depart
Depart
Time
Anytime
From
To
Depart
Depart
Time
Anytime

We work with more than 300 partners to bring you better travel deals

How to find the cheapest flight from
Islip (ISP) to San Francisco (SFO)

What is the cheapest day to fly round-trip from Islip to San Francisco?

Departing on a Tuesday is a good option for securing a great price. You can expect to save up to 194% when planning your travel around this day of the week.

How far in advance should I book a flight from Islip to San Francisco?

Travelers have found it’s best to book a flight 61 days in advance to save up to 99% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 61 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from Islip to San Francisco 1-2 weeks in advance for as low as $416, or $638 for flights within the next 24 hours.

When is the cheapest time to fly from Islip to San Francisco (ISP - SFO)?

Unlike in the morning, when flights are generally more expensive, you can save up to 46% on flights from Islip to San Francisco by exploring options for tickets in the afternoon.

Cheap flights from Islip to San Francisco in December, January 2021

The best prices found for ISP to SFO flights for December, January
7 Dec - 11 Dec
$191pp
ISP
Islip Long Island
Multiple Airlines
     
3 STOPS
SFO
San Francisco
SFO
San Francisco
Multiple Airlines
     
3 STOPS
ISP
Islip Long Island
15 Dec - 4 Jan
$192pp
ISP
Islip Long Island
American Airlines
 
1 STOP
SFO
San Francisco
SFO
San Francisco
American Airlines
 
1 STOP
ISP
Islip Long Island
7 Dec - 10 Dec
$193pp
ISP
Islip Long Island
Multiple Airlines
     
3 STOPS
SFO
San Francisco
SFO
San Francisco
Multiple Airlines
     
3 STOPS
ISP
Islip Long Island

Islip to San Francisco 2021 flight deals

Cheap flights to San Francisco from Islip found for this year
7 Dec - 11 Dec
$191pp
ISP
Islip Long Island
Multiple Airlines
     
3 STOPS
SFO
San Francisco
SFO
San Francisco
Multiple Airlines
     
3 STOPS
ISP
Islip Long Island
15 Dec - 4 Jan
$192pp
ISP
Islip Long Island
American Airlines
 
1 STOP
SFO
San Francisco
SFO
San Francisco
American Airlines
 
1 STOP
ISP
Islip Long Island
7 Dec - 10 Dec
$193pp
ISP
Islip Long Island
Multiple Airlines
     
3 STOPS
SFO
San Francisco
SFO
San Francisco
Multiple Airlines
     
3 STOPS
ISP
Islip Long Island

Last minute flights from Islip to San Francisco

Late deals on round-trip flights to San Francisco from Islip, departing today and this week
10 Dec - 13 Dec
$239pp
ISP
Islip Long Island
Multiple Airlines
     
3 STOPS
SFO
San Francisco
SFO
San Francisco
Frontier
     
3 STOPS
ISP
Islip Long Island
10 Dec - 13 Dec
$244pp
ISP
Islip Long Island
Multiple Airlines
   
2 STOPS
SFO
San Francisco
SFO
San Francisco
Frontier
     
3 STOPS
ISP
Islip Long Island
10 Dec - 13 Dec
$268pp
ISP
Islip Long Island
Multiple Airlines
   
2 STOPS
SFO
San Francisco
SFO
San Francisco
Multiple Airlines
   
2 STOPS
ISP
Islip Long Island

One-way flights to San Francisco from Islip

The cheapest one-way flights from Islip to San Francisco
8:39 am - 6:54 pm
Frontier
2 Stops
13h 15m
ISP - SFO
Frontier
$266
Kiwi.com
4:38 am - 2:01 pm
American Airlines
2 Stops
12h 23m
ISP - SFO
American Airlines
2:00 am - 5:10 pm
Multiple Airlines
3 Stops
18h 10m
ISP - SFO
Multiple Airlines
$1,736
Kiwi.com

Related info for your journey

Useful info, stats and facts about Islip to San Francisco flights.

Flight FAQs

From Islip to San Francisco

Are flight prices decreasing from Islip to San Francisco due to COVID-19 (coronavirus)?

At this time, Cheapflights has noticed price decreases for many domestic flights due to COVID-19. Travel is not necessarily recommended at this time, and flights may be prone to cancellation: please check with local authorities in both Islip and San Francisco for travel alerts, and be sure to review the airline's cancellation policy and travel advisories before booking. For more information, please view our post on what to know about COVID-19 (coronavirus) and travel.

What safety measures are being taken by airlines flying from Islip Long Island to San Francisco to control the spread of COVID-19?

Delta is one of the many airlines that have implemented additional safety measures to control the spread of COVID-19. Airline carriers are regularly disinfecting and sanitizing their aircraft. Masks are provided and are mandatory while on board. Pre-flight testing for symptoms and antibodies, alongside socially distanced seating (for a limited time) will work towards keeping travelers safer while flying from Islip Long Island to San Francisco. Policies will vary by airline.

Which airlines flying from Islip Long Island to San Francisco have flexible cancellations due to COVID-19?

Some of our airline partners flying from Islip Long Island to San Francisco have new flexible policies in place due to COVID-19. American Airlines and Delta are some of the carriers where you may find flexible cancellation policies. You can use our site to filter for airlines like American Airlines with this kind of flexibility.

Can I find flights from Islip to San Francisco for under $200 on Cheapflights?

Yes, there are multiple flights from Islip to San Francisco for under $200. The cheapest flight booked recently is on American Airlines for just $192, but on average you can expect to pay $265.

Are there nonstop flights from Islip to San Francisco for under $200 on Cheapflights?

There are no nonstop flights from Islip to San Francisco, but Cheapflights can provide you with all the information you need to find the fastest route with the fewest stops.

Are there last-minute flights available from Islip to San Francisco for under $300?

There are currently 12+ open flights from Islip to San Francisco within the next 7 days for less than $300.

What days are nonstop flights available from Islip to San Francisco?

Days when nonstop flights are available for this flight are: Sunday, Saturday.

Does it rain more in Islip or San Francisco?

The rainfall in Islip is generally more than the rainfall in San Francisco. This will continue over the next 14 days.

Is Islip weather warmer or cooler than San Francisco?

We forecast the temperature to be around the 84 °F's in July, on average. The temperature in San Francisco is generally colder than in Islip. Book flights in a timely manner in correlation to your departure date.

How long is the flight from Islip to San Francisco?

For as low as $192, American Airlines can have you in San Francisco from Islip in 9h 24m. This flight may include one or multiple stops.

What are the cheapest airlines flying from Islip to San Francisco round-trip?

American Airlines, at $192, was found to be the cheapest airline from Islip to San Francisco. An alternate airline flying to your destination would be Frontier. American Airlines is currently priced 46% below the average price you’ll pay for this route.

What are the cheapest airlines to fly from Islip to San Francisco one-way?

For one-way options, check prices for American Airlines. According to our data, you can fly for as low as $93. Users have also found tickets on Frontier for as little as $124.

Alternative routes for Islip to San Francisco

Destination information for San Francisco

Things to know before you go. Useful info for your trip from Islip to San Francisco
Average temperature for December in San Francisco
59.0 °F
Avg rainfall for December in San Francisco
4.7 ″

Airports servicing Islip

Airports servicing San Francisco

Home North America USA California San Francisco Cheap flights from Islip to San Francisco