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

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 $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.

Wed, Sep 2 - Wed, Sep 16
BWN
Brunei Intl.
SIN
Changi
$360 Roundtrip, found 4 hours ago
$360
Roundtrip
found 4 hours ago
Select Royal Brunei Airlines flight, departing Wed, Sep 2 from Brunei Intl. to Changi, returning Wed, Sep 16, priced at $360 found 4 hours ago
Fri, Jan 16 - Sun, Jan 18
BWN
Brunei Intl.
SIN
Changi
$537 Roundtrip, found 5 days ago
$537
Roundtrip
found 5 days ago
Select Royal Brunei Airlines flight, departing Fri, Jan 16 from Brunei Intl. to Changi, returning Sun, Jan 18, priced at $537 found 5 days ago
Tue, Jan 27 - Sat, Jan 31
BWN
Brunei Intl.
SIN
Changi
$545 Roundtrip, found 3 days ago
$545
Roundtrip
found 3 days ago
Select Royal Brunei Airlines flight, departing Tue, Jan 27 from Brunei Intl. to Changi, returning Sat, Jan 31, priced at $545 found 3 days ago
Wed, Feb 25 - Wed, Mar 4
BWN
Brunei Intl.
SIN
Changi
$547 Roundtrip, found 5 days ago
$547
Roundtrip
found 5 days ago
Select Royal Brunei Airlines flight, departing Wed, Feb 25 from Brunei Intl. to Changi, returning Wed, Mar 4, priced at $547 found 5 days ago
Wed, Feb 25 - Wed, Mar 4
BWN
Brunei Intl.
SIN
Changi
$586 Roundtrip, found 5 days ago
$586
Roundtrip
found 5 days ago
Select Royal Brunei Airlines flight, departing Wed, Feb 25 from Brunei Intl. to Changi, returning Wed, Mar 4, priced at $586 found 5 days ago
Wed, Feb 25 - Wed, Mar 4
BWN
Brunei Intl.
SIN
Changi
$588 Roundtrip, found 5 days ago
$588
Roundtrip
found 5 days ago
Select Royal Brunei Airlines flight, departing Wed, Feb 25 from Brunei Intl. to Changi, returning Wed, Mar 4, priced at $588 found 5 days ago
Wed, Feb 25 - Wed, Mar 4
BWN
Brunei Intl.
SIN
Changi
$597 Roundtrip, found 5 days ago
$597
Roundtrip
found 5 days ago
Select Royal Brunei Airlines flight, departing Wed, Feb 25 from Brunei Intl. to Changi, returning Wed, Mar 4, priced at $597 found 5 days ago
Fri, Jan 16 - Sun, Jan 18
BWN
Brunei Intl.
SIN
Changi
$616 Roundtrip, found 5 days ago
$616
Roundtrip
found 5 days ago
Select Royal Brunei Airlines flight, departing Fri, Jan 16 from Brunei Intl. to Changi, returning Sun, Jan 18, priced at $616 found 5 days ago
Tue, Jan 27 - Sat, Jan 31
BWN
Brunei Intl.
SIN
Changi
$616 Roundtrip, found 3 days ago
$616
Roundtrip
found 3 days ago
Select Royal Brunei Airlines flight, departing Tue, Jan 27 from Brunei Intl. to Changi, returning Sat, Jan 31, priced at $616 found 3 days ago
Fri, Jan 16 - Fri, Jan 23
BWN
Brunei Intl.
SIN
Changi
$666 Roundtrip, found 1 day ago
$666
Roundtrip
found 1 day ago
Select Royal Brunei Airlines flight, departing Fri, Jan 16 from Brunei Intl. to Changi, returning Fri, Jan 23, priced at $666 found 1 day ago
Tue, Jan 27 - Sat, Jan 31
BWN
Brunei Intl.
SIN
Changi
$672 Roundtrip, found 3 days ago
$672
Roundtrip
found 3 days ago
Select Royal Brunei Airlines flight, departing Tue, Jan 27 from Brunei Intl. to Changi, returning Sat, Jan 31, priced at $672 found 3 days ago
Fri, Jan 16 - Fri, Jan 23
BWN
Brunei Intl.
SIN
Changi
$760 Roundtrip, found 1 day ago
$760
Roundtrip
found 1 day ago
Select Royal Brunei Airlines flight, departing Fri, Jan 16 from Brunei Intl. to Changi, returning Fri, Jan 23, priced at $760 found 1 day ago
Fri, Jan 16 - Fri, Jan 23
BWN
Brunei Intl.
SIN
Changi
$762 Roundtrip, found 1 day ago
$762
Roundtrip
found 1 day ago
Select Royal Brunei Airlines flight, departing Fri, Jan 16 from Brunei Intl. to Changi, returning Fri, Jan 23, priced at $762 found 1 day 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.