Royal Brunei Airlines Flight 421 Deals & Information (2025/2026)

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Royal Brunei Airlines Flight 421 Route Deals From $226

The cheapest prices found with in the last 7 days for return flights were $359 and $226 for one-way flights to Changi for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, Jan 13 - Fri, Jan 23
BWN
Brunei Intl.
SIN
Changi
$359 Roundtrip, found 11 hours ago
$359
Roundtrip
found 11 hours ago
Select Royal Brunei Airlines flight, departing Tue, Jan 13 from Brunei Intl. to Changi, returning Fri, Jan 23, priced at $359 found 11 hours ago
Thu, Jan 15 - Fri, Jan 23
BWN
Brunei Intl.
SIN
Changi
$409 Roundtrip, found 11 hours ago
$409
Roundtrip
found 11 hours ago
Select Royal Brunei Airlines flight, departing Thu, Jan 15 from Brunei Intl. to Changi, returning Fri, Jan 23, priced at $409 found 11 hours ago
Fri, Jan 16 - Sun, Jan 18
BWN
Brunei Intl.
SIN
Changi
$579 Roundtrip, found 14 hours ago
$579
Roundtrip
found 14 hours ago
Select Royal Brunei Airlines flight, departing Fri, Jan 16 from Brunei Intl. to Changi, returning Sun, Jan 18, priced at $579 found 14 hours ago
Mon, Jan 5 - Thu, Jan 8
BWN
Brunei Intl.
SIN
Changi
$656 Roundtrip, found 4 days ago
$656
Roundtrip
found 4 days ago
Select Royal Brunei Airlines flight, departing Mon, Jan 5 from Brunei Intl. to Changi, returning Thu, Jan 8, priced at $656 found 4 days ago
Mon, Jan 5 - Thu, Jan 8
BWN
Brunei Intl.
SIN
Changi
$757 Roundtrip, found 4 days ago
$757
Roundtrip
found 4 days ago
Select Royal Brunei Airlines flight, departing Mon, Jan 5 from Brunei Intl. to Changi, returning Thu, Jan 8, priced at $757 found 4 days ago
Mon, Jan 5 - Thu, Jan 8
BWN
Brunei Intl.
SIN
Changi
$784 Roundtrip, found 4 days ago
$784
Roundtrip
found 4 days ago
Select Royal Brunei Airlines flight, departing Mon, Jan 5 from Brunei Intl. to Changi, returning Thu, Jan 8, priced at $784 found 4 days ago
Fri, Jan 16 - Sun, Jan 18
BWN
Brunei Intl.
SIN
Changi
$930 Roundtrip, found 14 hours ago
$930
Roundtrip
found 14 hours ago
Select Royal Brunei Airlines flight, departing Fri, Jan 16 from Brunei Intl. to Changi, returning Sun, Jan 18, priced at $930 found 14 hours 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.