FI631 ReykjavíkKEF · 17:10 BostonBOS · 18:50
FI631 by Icelandair flies from Reykjavík (KEF) to Boston (BOS) for the Mon, Sep 7 departure.
arrived at BOS · 16 min early
Where the minutes go
last 4 operations · gate push → arrivalThe bar is how late it left the gate; the ring is where it actually arrived. Board clocks, not estimates.
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Early read, sample still buildingConditions at KEF and BOS are near their clear-air norm right now, so this reflects the route's recent baseline rather than a weather penalty. For this route and airline, under conditions like today's, over the last 90 days. This route's tracked sample is still thin — treat these as an early read, not a precise forecast.
Pro Flight Search tracking, 90 days · the weather × delay correlation study → · live weather risk by airport →
When it flies
scheduled departuresEach mark is a scheduled departure at its origin-local time. Today is highlighted.
Other Reykjavík to Boston flights today
same route · IcelandairIf FI631 is cancelled, these are the other Icelandair nonstop flights from Reykjavík to Boston on the same day, with scheduled departure times in KEF local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How FI631 actually runs
Pro Flight Search has tracked every published board update for FI631 across the KEF and BOS boards: schedule changes, gate pushes and actual clocks. Usually lands ~60 min late. Based on 2 confirmed landings · 1/2 within 15 min of schedule.
The verdict above is that record speaking, so it reflects how FI631 operates rather than what the timetable promises. Numbers refresh as new flights operate.
How this operation is measured
Board log
scheduled → actual, per operationBoard clocks recorded as KEF and BOS published them.
Planning around FI631? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.
Pro Flight Search — FI631 Reykjavík to Boston on-time performance, measured from the KEF and BOS airport boards.
https://proflightsearch.com/flight/FI631
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