Book direct flights from Islip to Boston: One way flights from DKK 1,556, round trip flights from DKK 3,043. Find flight deals for the next 3 months below.

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

Flying from Islip to Boston

The distance between Islip and Boston is approximately 247.06 km. It takes around 1 hour 27 minutes on average to fly from Islip to Boston. Based on Trip.com's data travel demand peaks in August. The off-season for travel is November.

Cheapest one-way flight priceDKK 363
Cheapest round-trip ticket priceDKK 2,895
Off-season for travelNovember
Peak season for travelAugust
Flight distance247.06 km
Average flight time1 hour 27 minutes

When is the cheapest time to fly from Islip to Boston?

The cheapest time for Islip to Boston flights: Jan 4 to Jan 11 — one way flight prices from DKK 362.

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 Boston, calculated over the upcoming 10 weeks.

Frequently Asked Questions

  • What are the cheapest flights from Islip to Boston (ISP-BOS)?

    Based on Trip.com data, Frontier Airlines offers one-way fares as low as DKK 363 on Cheapest nonstop routes (e.g. ISP to BOS on Sun, Jan 11), while Jetblue Airways offers Cheapest nonstop round-trips from DKK 2,895 departing on Wed, Jan 7 and returning on Thu, Jan 8.
  • It takes around 1 hour 27 minutes to fly from Islip (ISP) to Boston (BOS).
  • 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 Boston 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 Boston, 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 Sun, Jan 11, with one-way flights priced at just DKK 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 Cape Air.
    · 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 Boston travel is around August.
    · Get exclusive promo codes for Trip.com app users.
  • The cheapest months to fly from Islip to Boston is November, when demand for travel is lower.
  • After crunching the numbers on our December flight calendar, it's currently cheapest to fly from Islip to Boston on December 19, 2025 with Cape Air, with prices starting at DKK 3,043.
  • The time difference between Boston and Islip is 0h.
  • 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.