Cheap Flights from San Jose to Islip from US$186

Frequently Asked Questions

• Which airlines offer the cheapest flights from San Jose (SJO) to Islip (ISP)?

  Based on Trip.com data, Spirit Airlines offers one-way fares as low as US$186 on Cheapest nonstop routes (e.g. SJO to ISP on Mon, Dec 15), while Jetblue Airways offers Cheapest nonstop round-trips from US$335 departing on Thu, Dec 25 and returning on Thu, Jan 1.

• When is the best time to book flights from San Jose to Islip?

  By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from San Jose to Islip 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.

• How can I find the best deals on flights from San Jose to Islip?

  To find best deals on flights from San Jose to Islip, 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, Dec 15, with one-way flights priced at just US$186.
  · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is Spirit Airlines.
  · 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 Islip travel is around October.
  · Get exclusive promo codes for Trip.com app users.

• When is the best time to book a flight from San Jose to Islip to get the best price?

  The cheapest months to fly from San Jose to Islip is November, when demand for travel is lower.

• Which upcoming date is the cheapest for flights from San Jose to Islip?

  After crunching the numbers on our December flight calendar, it's currently cheapest to fly from San Jose to Islip on December 25, 2025 with Jetblue Airways, with prices starting at US$334.

• What is the time difference between San Jose and Islip?

  The time difference between Islip and San Jose is 1h.

• How can I change or cancel my flight ticket from San Jose to Islip?

  Tickets can only be changed or cancelled 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.