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 $499 and $226 for one-way flights to Changi for the period specified. Prices and availability are subject to change. Additional terms apply.

Sat, Dec 27 - Tue, Dec 30
BWN
Brunei Intl.
SIN
Changi
$499 Roundtrip, found 1 day ago
$499
Roundtrip
found 1 day ago
Select Royal Brunei Airlines flight, departing Sat, Dec 27 from Brunei Intl. to Changi, returning Tue, Dec 30, priced at $499 found 1 day ago
Sat, Dec 27 - Tue, Dec 30
BWN
Brunei Intl.
SIN
Changi
$535 Roundtrip, found 1 day ago
$535
Roundtrip
found 1 day ago
Select Royal Brunei Airlines flight, departing Sat, Dec 27 from Brunei Intl. to Changi, returning Tue, Dec 30, priced at $535 found 1 day ago
Sat, Dec 27 - Tue, Dec 30
BWN
Brunei Intl.
SIN
Changi
$538 Roundtrip, found 1 day ago
$538
Roundtrip
found 1 day ago
Select Royal Brunei Airlines flight, departing Sat, Dec 27 from Brunei Intl. to Changi, returning Tue, Dec 30, priced at $538 found 1 day ago
Fri, Dec 26 - Tue, Dec 30
BWN
Brunei Intl.
SIN
Changi
$585 Roundtrip, found 1 day ago
$585
Roundtrip
found 1 day ago
Select Royal Brunei Airlines flight, departing Fri, Dec 26 from Brunei Intl. to Changi, returning Tue, Dec 30, priced at $585 found 1 day ago
Mon, Jan 5 - Thu, Jan 8
BWN
Brunei Intl.
SIN
Changi
$656 Roundtrip, found 3 days ago
$656
Roundtrip
found 3 days ago
Select Royal Brunei Airlines flight, departing Mon, Jan 5 from Brunei Intl. to Changi, returning Thu, Jan 8, priced at $656 found 3 days ago
Fri, Dec 26 - Tue, Dec 30
BWN
Brunei Intl.
SIN
Changi
$689 Roundtrip, found 1 day ago
$689
Roundtrip
found 1 day ago
Select Royal Brunei Airlines flight, departing Fri, Dec 26 from Brunei Intl. to Changi, returning Tue, Dec 30, priced at $689 found 1 day ago
Mon, Jan 5 - Thu, Jan 8
BWN
Brunei Intl.
SIN
Changi
$757 Roundtrip, found 3 days ago
$757
Roundtrip
found 3 days ago
Select Royal Brunei Airlines flight, departing Mon, Jan 5 from Brunei Intl. to Changi, returning Thu, Jan 8, priced at $757 found 3 days ago
Mon, Jan 5 - Thu, Jan 8
BWN
Brunei Intl.
SIN
Changi
$784 Roundtrip, found 3 days ago
$784
Roundtrip
found 3 days ago
Select Royal Brunei Airlines flight, departing Mon, Jan 5 from Brunei Intl. to Changi, returning Thu, Jan 8, priced at $784 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.