FI631Icelandair · KEF → BOS
live · 16m ago
Route confirmed Icelandair

FI631 ReykjavíkKEF · 17:00 BostonBOS · 17:50

FI631 by Icelandair flies from Reykjavík (KEF) to Boston (BOS) for the Tue, Nov 3 departure.

Right nowEn route to Boston · off blocks 17:05 · 5 min late
17:30

estimated arrival at BOS · local time · ~3h 20m from now

En routeFI631 · position estimated
KEFReykjavíkBOSBoston
Estimated from the boardsarr 17:30

Board estimate · gate and arrival times. Off blocks 17:05 · typical taxi-out at KEF ≈ 6 min. No receiver coverage over open ocean.

Typical gate push+3 minmedian posted departure
Typical arrival−12 minmedian over 5 operations
Wins back in air~15 minmedian gate push vs arrival · how planes make up time →

Where the minutes go

last 5 operations · gate push → arrival
0+30+60+90 min
11-03
+5 gate · −16 arrival
11-02
+11 gate · −12 arrival
11-01
+0 gate · −24 arrival
10-31
+1 gate · −10 arrival
10-30
−1 arrival

The bar is how late it left the gate; the ring is where it actually arrived. Board clocks, not estimates.

The last 30 days

arrival outcome per operation

median arrival −12 min · 0 cancelled · 5 operations tracked

The route today

live boards
KEFReykjavíkOn-time likelyKEF delay board →
BOSBostonOn-time likelyBOS delay board →
KEF→BOSevery carrier, schedules and on-time historyRoute intelligence →

Weather lens

Delay & cancellation outlook for this flight

Measured, 90-day sample
38%Chance of 15+ min delay
3.3%Chance of cancellation
+5 minTypical airport delay in this weather

Conditions 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. These figures come from both airports' records under conditions like today's, over the last 90 days.

Pro Flight Search tracking, 90 days · the weather × delay correlation study → · live weather risk by airport →

Tomorrow at Reykjavík

Forecast

Wed 4 Nov, local date

High8°Clikely 7°C to 9°C
Low5°Clikely 3°C to 6°C
  • 90% chance of rain

Forecast: GateWeather · incl. data from ECMWF (CC BY 4.0, modified) · Expected values for tomorrow from a forecast model, kept apart from today's measured figures.

Tomorrow at Boston

Forecast

Wed 4 Nov, local date

High24°Clikely 22°C to 25°C
Low14°Clikely 12°C to 15°C

Forecast: GateWeather · incl. data from ECMWF (CC BY 4.0, modified) · Expected values for tomorrow from a forecast model, kept apart from today's measured figures.

When it flies

scheduled departures
061422
M
T
W
T
F
S
S

Each mark is a scheduled departure at its origin-local time. Today is highlighted.

Other Reykjavík to Boston flights today

same route · Icelandair
FI635departs 10:25
FI633departs 20:25

If 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 that show a delay still operate. Rebooking usually helps only when that delay is very large. 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 ~10 min early. Based on 3 confirmed landings · 3/3 within 15 min of schedule. Pushes back late but makes up time in the air.

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.

Technical record

How this operation is measured

board clocks

Board log

scheduled → actual, per operation
11-03KEF 17:00 17:05 (+5)BOS 17:50 17:34 (−16)
11-02KEF 17:00 17:11 (+11)BOS 17:50 17:38 (−12)
11-01KEF 17:00 (+0)BOS 17:50 17:26 (−24)
10-31KEF 17:00 17:01 (+1)BOS 18:50 18:40 (−10)
10-30KEF BOS 18:50 18:49 (−1)

Board 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

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: FI631 Reykjavík to Boston on-time performance, measured from the KEF and BOS airport boards.

Canonical URL
https://proflightsearch.com/flight/FI631
How we measure this →