Route guide

Islip to Boston (ISP-BOS): Nonstop Upgrade & Award Space

Cape Air flies nonstop between Islip (ISP) and Boston (BOS), roughly 24 times a week. With Cape Air operating this route so often, premium seats still turn over daily, and upgrade or award space can open and close within hours. 2LNR tracks confirmed availability on every ISP to BOS departure, so you know which flights have space before you book.

Data current as of July 21, 2026, refreshed on an ongoing basis as new schedules and seats are confirmed.

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24
Nonstop flights a week
153 mi
Nonstop distance
Free
To get started

Confirmed upgrade & award space on every ISP to BOS departure

2LNR tracks confirmed upgrade and award availability on American, Delta, and Alaska and across 30 airlines, segment by segment, date by date. Open the calendar for Islip to Boston to see which departures have real space, or watch the route and get alerted when space opens.

See real availability

Confirmed upgrade and award seats on each ISP to BOS departure, checked against live inventory so you know what is open before you book.

Set an alert

Premium inventory turns over fast. Watch this route and 2LNR notifies you when space appears on a date you are tracking.

Plan on the map

See ISP to BOS on the interactive route map, with schedules, connections, and route statistics.

Airlines flying Islip to Boston nonstop

Carriers operating ISP to BOS nonstop in the current schedule. 2LNR tracks confirmed upgrade and award space on each of them.

  • Cape Air
See ISP to BOS on the interactive map →

Frequently asked questions about ISP to BOS

How far is Boston from Islip?
ISP to BOS covers about 153 miles nonstop. Flight times vary by aircraft and season; each scheduled departure on this page lists its own times.
Which airlines fly nonstop from ISP to BOS?
Cape Air is currently the only airline flying ISP to BOS nonstop. 2LNR tracks confirmed upgrade and award space on every Cape Air departure.
How many flights a week are there from ISP to BOS?
About 24 nonstop flights a week run between Islip and Boston in the current schedule, operated by Cape Air. Frequency shifts by season; the calendar on this page reflects what's currently scheduled.
How do I check upgrade or award availability on ISP to BOS?
Open the ISP to BOS calendar on this page to see confirmed upgrade and award space by date. You can also set an alert on the Islip to Boston route, and 2LNR will notify you when space opens. It's free to start.

Never miss ISP to BOS upgrade or award space

Track confirmed availability, set alerts, and book with confidence. Free to start, no credit card required.

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