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Flights from Islip to San Francisco

Find the cheapest flight options from Islip to San Francisco over the next three months. Book one-way tickets from NZD 363 and round-trip tickets from NZD 877.

      • ISP 15:34
        31h 1m
        1 stop
        SFO 19:35
        Islip - San Francisco | Tue, Jan 6 | Frontier Airlines
        SFO 22:50
        12h 49m
        1 stop
        ISP 14:39
        San Francisco - Islip | Sun, Jan 11 | United Airlines
        NZD 877 NZD 2,330
        62% OFF
        62% OFF
        NZD 2,330 NZD 877
      • ISP 14:04
        12h 6m
        1 stop
        SFO 23:10
        Islip - San Francisco | Sun, Dec 21 | Frontier Airlines
        SFO 23:07
        11h 2m
        1 stop
        ISP 13:09
        San Francisco - Islip | Sun, Dec 28 | Hawaiian Airlines
        NZD 1,090 NZD 2,330
        53% OFF
        53% OFF
        NZD 2,330 NZD 1,090
      • ISP 07:30
        10h 21m
        1 stop
        SFO 14:51
        Islip - San Francisco | Tue, Jan 6 | Cape Air
        SFO 23:25
        8h 39m
        1 stop
        ISP 11:04
        San Francisco - Islip | Sun, Jan 11 | United Airlines
        NZD 1,558 NZD 2,330
        33% OFF
        33% OFF
        NZD 2,330 NZD 1,558
      • ISP 09:59
        28h 51m
        1 stop
        SFO 11:50
        Islip - San Francisco | Sun, Jan 4 | Cape Air
        SFO 07:10
        9h 35m
        1 stop
        ISP 19:45
        San Francisco - Islip | Sun, Jan 11 | Delta Air Lines
        NZD 1,714
        26% OFF
        NZD 2,330 NZD 1,714
      • ISP 12:30
        14h 29m
        1 stop
        SFO 23:59
        Islip - San Francisco | Sat, Dec 13 | Cape Air
        SFO 07:00
        25h 5m
        1 stop
        ISP 11:05
        San Francisco - Islip | Thu, Dec 18 | Delta Air Lines
        NZD 1,767
        24% OFF
        NZD 2,330 NZD 1,767
      • ISP 09:59
        28h 38m
        1 stop
        SFO 11:37
        Islip - San Francisco | Mon, Dec 22 | Cape Air
        SFO 07:30
        24h 35m
        1 stop
        ISP 11:05
        San Francisco - Islip | Fri, Dec 26 | Delta Air Lines
        NZD 1,957
        16% OFF
        NZD 2,330 NZD 1,957
      • ISP 12:30
        26h 7m
        1 stop
        SFO 11:37
        Islip - San Francisco | Wed, Dec 24 | Cape Air
        SFO 07:30
        24h 35m
        1 stop
        ISP 11:05
        San Francisco - Islip | Sun, Dec 28 | Delta Air Lines
        NZD 2,097
        10% OFF
        NZD 2,330 NZD 2,097
      • ISP 13:00
        17h 25m
        1 stop
        SFO Invalid Date
        Islip - San Francisco | Sat, Dec 13 | Normal Airline
        SFO 15:00
        6h
        Direct
        ISP 16:00
        San Francisco - Islip | Mon, Dec 15 | Normal Airline
        Find More Flights
        Find More Flights
      • ISP 12:25
        14h 4m
        1 stop
        SFO 23:29
        Islip - San Francisco | Mon, Jan 26 | Jetblue Airways
        NZD 363 NZD 791
        54% OFF
        54% OFF
        NZD 791 NZD 363
      • ISP 12:25
        14h 5m
        1 stop
        SFO 23:30
        Islip - San Francisco | Mon, Jan 12 | Jetblue Airways
        NZD 364 NZD 791
        54% OFF
        54% OFF
        NZD 791 NZD 364
      • ISP 11:50
        14h 43m
        1 stop
        SFO 23:33
        Islip - San Francisco | Mon, Dec 15 | Jetblue Airways
        NZD 426 NZD 791
        46% OFF
        46% OFF
        NZD 791 NZD 426
      • ISP 16:40
        19h 49m
        1 stop
        SFO 09:29
        Islip - San Francisco | Tue, Dec 30 | Frontier Airlines
        NZD 433
        45% OFF
        NZD 791 NZD 433
      • ISP 14:04
        33h 5m
        1 stop
        SFO 20:09
        Islip - San Francisco | Sun, Dec 21 | Frontier Airlines
        NZD 552
        30% OFF
        NZD 791 NZD 552
      • ISP 19:40
        16h 49m
        1 stop
        SFO 09:29
        Islip - San Francisco | Sat, Dec 20 | Jetblue Airways
        NZD 558
        28% OFF
        NZD 791 NZD 558
      • ISP 19:40
        16h 49m
        1 stop
        SFO 09:29
        Islip - San Francisco | Sun, Dec 21 | Jetblue Airways
        NZD 580
        27% OFF
        NZD 791 NZD 580
      • ISP 20:24
        16h 21m
        1 stop
        SFO 09:45
        Islip - San Francisco | Sun, Jan 4 | Frontier Airlines
        NZD 709
        10% OFF
        NZD 791 NZD 709
      • ISP 07:25
        9h 36m
        1 stop
        SFO 14:01
        Islip - San Francisco | Fri, Dec 12 | Cape Air
        NZD 711
        10% OFF
        NZD 791 NZD 711
      • ISP 12:30
        28h 24m
        1 stop
        SFO 13:54
        Islip - San Francisco | Mon, Jan 12 | Cape Air
        NZD 712
        10% OFF
        NZD 791 NZD 712
      • ISP 13:00
        17h 25m
        1 stop
        SFO Invalid Date
        Islip - San Francisco | Sat, Dec 13 | Normal Airline
        Find More Flights
        Find More Flights

Displayed flight fares from Islip to San Francisco are based on average prices across airlines for the next 3 months, according to the latest Trip.com database.

Flight details for Islip to San Francisco

The distance between Islip and San Francisco is 4,205.68 km. Based on Trip.com's data, travel demand peaks in July. The off-season for travel is October.

Cheapest one-way flight priceNZD 363
Cheapest round-trip ticket priceNZD 877
Off-season for travelOctober
Peak season for travelJuly
Flight distance4,205.68 km

Find the best time to fly from Islip to San Francisco

The cheapest time for Islip to San Francisco flights: Jan 25 to Feb 1 — one way flight prices from NZD 231.

Cheapest flights
From price
Search
  • 714
  • 1421
  • 2128

  • Jan

    284
  • 411
  • 1118
  • 1825

  • Feb

    251
  • 18
  • 815
  • 1522

  • Mar

    221
Displayed fare trends are based on Trip.com's aggregated average of the lowest flight prices from Islip to San Francisco, calculated over the upcoming 10 weeks.

Flight FAQs

  • What are the cheapest flights from Islip to San Francisco (ISP-SFO)?

    Based on Trip.com data, Jetblue Airways offers one-way fares as low as NZD 363 on Cheapest nonstop routes (e.g. ISP to SFO on Mon, Jan 26), while Frontier Airlines offers Cheapest nonstop round-trips from NZD 877 departing on Tue, Jan 6 and returning on Sun, Jan 11.
  • By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Islip to San Francisco is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.
  • To find best deals on flights from Islip to San Francisco, you can use various tools on Trip.com:
    · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Mon, Jan 26, with one-way flights priced at just NZD 363.
    · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is Jetblue Airways.
    · Set up price alerts to easily monitor ticket prices without having to check every day.
    · Check Trip.com flight deals and promo codes frequently.
    · Avoid peak season unless you book very early. It seems the peak season for San Francisco travel is around July.
    · Get exclusive promo codes for Trip.com app users.
  • The cheapest months to fly from Islip to San Francisco is October, when demand for travel is lower.
  • After crunching the numbers on our December flight calendar, it's currently cheapest to fly from Islip to San Francisco on December 21, 2025 with Frontier Airlines, with prices starting at NZD 1,089.
  • The time difference between San Francisco and Islip is 3h.
  • Tickets can only be changed or canceled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.