BI421 Bandar Seri BegawanBWN SingaporeSIN · 11:20
BI421 by Royal Brunei Airlines flies from Bandar Seri Begawan (BWN) to Singapore (SIN) for the Wed, Oct 14 departure.
arrival expected at SIN · on schedule
board checked 57m ago · checking again in 45s
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 boardsWhen it flies
scheduled departuresEach mark is a scheduled departure at its origin-local time. Today is highlighted.
How BI421 actually runs
Pro Flight Search has tracked every published board update for BI421 across the BWN and SIN boards: schedule changes, gate pushes and actual clocks. Usually lands on time. Based on 4 confirmed landings · 4/4 within 15 min of schedule.
The verdict above is that record speaking, so it reflects how BI421 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 BWN and SIN published them.
Planning around BI421? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — BI421 Bandar Seri Begawan to Singapore on-time performance, measured from the BWN and SIN airport boards.
https://proflightsearch.com/flight/BI421
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