Royal Brunei Airlines Flight 421 Deals & Information (2026/2027)

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Royal Brunei Airlines Flight 421 Route Deals From $227

The cheapest prices found with in the last 7 days for return flights were $360 and $227 for one-way flights to Changi for the period specified. Prices and availability are subject to change. Additional terms apply.

Sun, Apr 12 - Wed, Apr 15
BWN
Brunei Intl.
SIN
Changi
$360 Roundtrip, found 7 hours ago
$360
Roundtrip
found 7 hours ago
Select Royal Brunei Airlines flight, departing Sun, Apr 12 from Brunei Intl. to Changi, returning Wed, Apr 15, priced at $360 found 7 hours ago
Sat, Jan 10 - Thu, Jan 15
BWN
Brunei Intl.
SIN
Changi
$364 Roundtrip, found 2 days ago
$364
Roundtrip
found 2 days ago
Select Royal Brunei Airlines flight, departing Sat, Jan 10 from Brunei Intl. to Changi, returning Thu, Jan 15, priced at $364 found 2 days ago
Fri, Jan 16 - Sun, Jan 18
BWN
Brunei Intl.
SIN
Changi
$535 Roundtrip, found 17 hours ago
$535
Roundtrip
found 17 hours ago
Select Royal Brunei Airlines flight, departing Fri, Jan 16 from Brunei Intl. to Changi, returning Sun, Jan 18, priced at $535 found 17 hours ago
Sun, Feb 8 - Tue, Feb 10
BWN
Brunei Intl.
SIN
Changi
$544 Roundtrip, found 11 hours ago
$544
Roundtrip
found 11 hours ago
Select Royal Brunei Airlines flight, departing Sun, Feb 8 from Brunei Intl. to Changi, returning Tue, Feb 10, priced at $544 found 11 hours ago
Tue, Jan 27 - Sat, Jan 31
BWN
Brunei Intl.
SIN
Changi
$545 Roundtrip, found 5 days ago
$545
Roundtrip
found 5 days ago
Select Royal Brunei Airlines flight, departing Tue, Jan 27 from Brunei Intl. to Changi, returning Sat, Jan 31, priced at $545 found 5 days ago
Fri, Jan 16 - Sun, Jan 18
BWN
Brunei Intl.
SIN
Changi
$579 Roundtrip, found 17 hours ago
$579
Roundtrip
found 17 hours ago
Select Royal Brunei Airlines flight, departing Fri, Jan 16 from Brunei Intl. to Changi, returning Sun, Jan 18, priced at $579 found 17 hours ago
Tue, Jan 27 - Sat, Jan 31
BWN
Brunei Intl.
SIN
Changi
$616 Roundtrip, found 5 days ago
$616
Roundtrip
found 5 days ago
Select Royal Brunei Airlines flight, departing Tue, Jan 27 from Brunei Intl. to Changi, returning Sat, Jan 31, priced at $616 found 5 days ago
Sat, Jan 10 - Thu, Jan 15
BWN
Brunei Intl.
SIN
Changi
$633 Roundtrip, found 2 days ago
$633
Roundtrip
found 2 days ago
Select Royal Brunei Airlines flight, departing Sat, Jan 10 from Brunei Intl. to Changi, returning Thu, Jan 15, priced at $633 found 2 days ago
Fri, Jan 16 - Sun, Jan 18
BWN
Brunei Intl.
SIN
Changi
$666 Roundtrip, found 17 hours ago
$666
Roundtrip
found 17 hours ago
Select Royal Brunei Airlines flight, departing Fri, Jan 16 from Brunei Intl. to Changi, returning Sun, Jan 18, priced at $666 found 17 hours ago
Tue, Jan 27 - Sat, Jan 31
BWN
Brunei Intl.
SIN
Changi
$672 Roundtrip, found 5 days ago
$672
Roundtrip
found 5 days ago
Select Royal Brunei Airlines flight, departing Tue, Jan 27 from Brunei Intl. to Changi, returning Sat, Jan 31, priced at $672 found 5 days ago
Fri, Jan 16 - Fri, Jan 23
BWN
Brunei Intl.
SIN
Changi
$762 Roundtrip, found 4 days ago
$762
Roundtrip
found 4 days ago
Select Royal Brunei Airlines flight, departing Fri, Jan 16 from Brunei Intl. to Changi, returning Fri, Jan 23, priced at $762 found 4 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.