Royal Brunei Airlines Flight BI421 Deals & Information (2025/2026)

Wander Wisely with exceptional service, 24/7 supportOpens in a new window

Feel at ease with free flight cancellations within 24 hours of booking

Change your flight without a fee on select flights

Royal Brunei Airlines Flight 421 Route Deals From $226

The cheapest prices found with in the last 7 days for return flights were $360 and $226 for one-way flights to Changi for the period specified. Prices and availability are subject to change. Additional terms apply.

Wed, Oct 29 - Fri, Oct 31
BWN
Brunei Intl.
SIN
Changi
$360 Roundtrip, found 17 hours ago
$360
Roundtrip
found 17 hours ago
Select Royal Brunei Airlines flight, departing Wed, Oct 29 from Brunei Intl. to Changi, returning Fri, Oct 31, priced at $360 found 17 hours ago
Wed, Oct 29 - Fri, Oct 31
BWN
Brunei Intl.
SIN
Changi
$552 Roundtrip, found 17 hours ago
$552
Roundtrip
found 17 hours ago
Select Royal Brunei Airlines flight, departing Wed, Oct 29 from Brunei Intl. to Changi, returning Fri, Oct 31, priced at $552 found 17 hours ago
Mon, Aug 18 - Thu, Aug 21
BWN
Brunei Intl.
SIN
Changi
$665 Roundtrip, found 3 days ago
$665
Roundtrip
found 3 days ago
Select Royal Brunei Airlines flight, departing Mon, Aug 18 from Brunei Intl. to Changi, returning Thu, Aug 21, priced at $665 found 3 days ago
Mon, Aug 18 - Thu, Aug 21
BWN
Brunei Intl.
SIN
Changi
$972 Roundtrip, found 3 days ago
$972
Roundtrip
found 3 days ago
Select Royal Brunei Airlines flight, departing Mon, Aug 18 from Brunei Intl. to Changi, returning Thu, Aug 21, priced at $972 found 3 days ago

Frequently asked questions

What route does flight number BI421 take?
Flight number BI421 operates direct from Bandar Seri Begawan Airport (BWN-Brunei Intl.) to Singapore Airport (SIN-Changi). During this journey, expect to be in the air for approximately 2 hours and 5 minutes. It's wise to book ahead to secure your favorite seat.
What kind of plane is on flight number BI421?
Prepare to jump on board an Airbus A320 if you've booked a seat on flight BI421. The majority of flights from Bandar Seri Begawan Airport (BWN-Brunei Intl.) to SIN use this type of aircraft.
If I am not able to travel due to COVID-19, can I change my flight to a later date?
For more info about changing your BI421 flight with Travelocity, please visit our Customer Service Portal.