BI421 Royal Brunei Airlines
BI421 Royal Brunei Airlines from Bandar Seri Begawan (BWN) to Singapore (SIN): usually departs 09:20, 2 h, A20N. Usual times, aircraft, on-time record and miles earned over the last 30 days.
| Route | Flights recorded | Usually departs | Usually arrives | Scheduled time | Aircraft | Within 15 min |
|---|---|---|---|---|---|---|
| BWN → SIN | 25 | 09:20 | 11:20 | 2 h | A20N, B788 | 87% of 23 graded |
Latest flights of BI421, by local departure date
- Tue, 3 Nov 2026: BWN → SIN
- Mon, 2 Nov 2026: BWN → SIN
- Sun, 1 Nov 2026: BWN → SIN
- Sat, 31 Oct 2026: BWN → SIN
- Fri, 30 Oct 2026: BWN → SIN
About Royal Brunei Airlines flight BI421
Tierleap recorded 25 scheduled Royal Brunei Airlines BI421 flights from Brunei International Airport (BWN) to Singapore Changi Airport (SIN) in the last 30 days. It usually leaves Bandar Seri Begawan at 09:20 local time and arrives in Singapore at 11:20 local time, a scheduled 2 h. Aircraft types recorded: A20N (21 flights) and B788 (4 flights). Of 23 BI421 flights from BWN to SIN with a final arrival time, 20 (87%) arrived no more than 15 minutes after schedule.
At Singapore Changi Airport (SIN), Tierleap's gate arrival forecast (Tierleap model) has a measured error of 9.2 minutes over 30 graded flights and landing forecast (Tierleap model) has a measured error of 11.1 minutes over 80 graded flights in the last 2 days.
Questions about BI421
What time does BI421 depart?
From Brunei International Airport (BWN) to Singapore Changi Airport (SIN), BI421 usually leaves Bandar Seri Begawan at 09:20 local time and arrives in Singapore at 11:20 local time.
How long is flight BI421?
The scheduled time of BI421 from BWN to SIN is 2 h, the median of the last 30 days.
What aircraft does BI421 use?
Aircraft types recorded: A20N (21 flights) and B788 (4 flights).
Is BI421 usually on time?
Of 23 BI421 flights from BWN to SIN with a final arrival time, 20 (87%) arrived no more than 15 minutes after schedule.
How accurate is Tierleap's forecast for BI421?
At Singapore Changi Airport (SIN), Tierleap's gate arrival forecast (Tierleap model) has a measured error of 9.2 minutes over 30 graded flights and landing forecast (Tierleap model) has a measured error of 11.1 minutes over 80 graded flights in the last 2 days.