KEF → BOSReykjavík to Boston

live

Direct flights from Reykjavík (KEF) to Boston (BOS): 7 nonstop departures observed each week across 1 airline. 83% of the last 6 operated flights arrived within 15 minutes of schedule. The median arrival is 19 minutes early. No cancellations were recorded across the 6 tracked flights. The nonstop covers 3,874 km, an estimated 5 hours 28 minutes in the air. Measured by Pro Flight Search from live flight boards at Reykjavík and Boston. Updated 8 September 2026 at 11:23 UTC.

KEF Reykjavík smooth · +0
BOS Boston heavy · +40
3,874 km · ~5h 28m est.
dep bank 17:10–19:557x weekly
Runs reliable · 1 airline · 7x weekly · nonstop
83% on time

of the last 6 operated KEF → BOS flights arrived within 15 minutes

Median arrival delay is −19 min. 0 of 6 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →

Median arrival−19 minacross the last 6 operated legs
Flight time~5h 28mestimated from route distance
Weekly departures7x1 direct airline on the leg

The week

scheduled departures · origin local time
06121824
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Icelandair

Each mark is a scheduled departure at its origin-local time, observed operating in the last 7 days. Today is highlighted.

Who flies it

observed on the boards · 7 days
IcelandairFI83% on time

Flights FI631 17:10 daily · FI633 19:55 daily

History

operated legs · board outcomes
09-07FI631dep +0 → arr+0
09-07FI633dep −3 → arr−24
09-06FI631dep +102 → arr+60
09-06FI633dep +3 → arr−31
09-05FI631dep −1 → arr−19
09-05FI633dep +13 → arr−23

Actual board outcomes rather than schedules, paired departure and arrival per flight and day.

Full board history, day by day →

Airports right now

live boards
KEFReykjavík +0 min smooth 🌤 clear · ENE 1 kt Full KEF delay board →
BOSBoston +40 min heavy 🌤 mostly cloudy · W 11 kt Full BOS delay board →

Weather lens

Current conditions put the pressure at BOS: 42% odds of a 15+ minute delay and around +9 min expected when it bites, measured from this route's own weather-matched delay history. See live delays → · Weather risk by airport →

How the Reykjavík to Boston route actually runs

Pro Flight Search records official board updates for nonstop KEF to BOS flights through the day: schedules, estimates, gate pushes and actual departures. The verdict above comes from operated flights, so it reflects what this route does rather than what the timetable promises.

Planning around a delay? Live airport delays · Weather delay risk map · Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure

Cite this data

Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.

Suggested citation

Pro Flight Search — Reykjavík (KEF) to Boston (BOS) route reliability, measured from operated flights on official airport boards.

Canonical URL
https://proflightsearch.com/search-flights/KEF-BOS
How we measure this →

KEF to BOS questions

Is KEF–BOS running on time right now?

Mostly on schedule. The arrival side at BOS is the weaker end, route health score 73/100. The airports section above carries the live status and delay window at both ends.

Morning or evening flight on KEF–BOS?

Operators schedule evening departures around 17:10 from KEF. Earlier flights typically land before destination-airport delays accumulate later in the day; check the BOS delay card to confirm conditions when you'd arrive.

How long is the flight from KEF to BOS?

Great-circle distance is 3,874 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 303–362 min gate-to-gate on this route.

How often does KEF–BOS fly?

Icelandair runs the route with about 14 flights a week (daily). Since one carrier owns the route, a single disruption tends to ripple through the day.