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

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Royal Brunei Airlines Flight 421 Route Deals From $238

The cheapest prices found with in the last 7 days for return flights were $380 and $238 for one-way flights to Changi for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, Sep 22 - Thu, Sep 24
BWN
Brunei Intl.
SIN
Changi
$380 Roundtrip, found 8 hours ago
$380
Roundtrip
found 8 hours ago
Select Royal Brunei Airlines flight, departing Tue, Sep 22 from Brunei Intl. to Changi, returning Thu, Sep 24, priced at $380 found 8 hours ago
Thu, May 28 - Sun, May 31
BWN
Brunei Intl.
SIN
Changi
$557 Roundtrip, found 6 days ago
$557
Roundtrip
found 6 days ago
Select Royal Brunei Airlines flight, departing Thu, May 28 from Brunei Intl. to Changi, returning Sun, May 31, priced at $557 found 6 days ago
Tue, Sep 22 - Thu, Sep 24
BWN
Brunei Intl.
SIN
Changi
$588 Roundtrip, found 8 hours ago
$588
Roundtrip
found 8 hours ago
Select Royal Brunei Airlines flight, departing Tue, Sep 22 from Brunei Intl. to Changi, returning Thu, Sep 24, priced at $588 found 8 hours ago
Fri, Nov 13 - Sun, Nov 15
BWN
Brunei Intl.
SIN
Changi
$589 Roundtrip, found 4 days ago
$589
Roundtrip
found 4 days ago
Select Royal Brunei Airlines flight, departing Fri, Nov 13 from Brunei Intl. to Changi, returning Sun, Nov 15, priced at $589 found 4 days ago
Tue, Sep 22 - Thu, Sep 24
BWN
Brunei Intl.
SIN
Changi
$600 Roundtrip, found 8 hours ago
$600
Roundtrip
found 8 hours ago
Select Royal Brunei Airlines flight, departing Tue, Sep 22 from Brunei Intl. to Changi, returning Thu, Sep 24, priced at $600 found 8 hours ago
Mon, Sep 21 - Sun, Sep 27
BWN
Brunei Intl.
SIN
Changi
$600 Roundtrip, found 5 days ago
$600
Roundtrip
found 5 days ago
Select Royal Brunei Airlines flight, departing Mon, Sep 21 from Brunei Intl. to Changi, returning Sun, Sep 27, priced at $600 found 5 days ago
Fri, May 29 - Fri, Jun 5
BWN
Brunei Intl.
SIN
Changi
$620 Roundtrip, found 4 days ago
$620
Roundtrip
found 4 days ago
Select Royal Brunei Airlines flight, departing Fri, May 29 from Brunei Intl. to Changi, returning Fri, Jun 5, priced at $620 found 4 days ago
Tue, Sep 22 - Thu, Sep 24
BWN
Brunei Intl.
SIN
Changi
$627 Roundtrip, found 8 hours ago
$627
Roundtrip
found 8 hours ago
Select Royal Brunei Airlines flight, departing Tue, Sep 22 from Brunei Intl. to Changi, returning Thu, Sep 24, priced at $627 found 8 hours ago
Sat, May 16 - Sun, May 17
BWN
Brunei Intl.
SIN
Changi
$627 Roundtrip, found 6 days ago
$627
Roundtrip
found 6 days ago
Select Royal Brunei Airlines flight, departing Sat, May 16 from Brunei Intl. to Changi, returning Sun, May 17, priced at $627 found 6 days ago
Fri, May 29 - Fri, Jun 5
BWN
Brunei Intl.
SIN
Changi
$689 Roundtrip, found 4 days ago
$689
Roundtrip
found 4 days ago
Select Royal Brunei Airlines flight, departing Fri, May 29 from Brunei Intl. to Changi, returning Fri, Jun 5, priced at $689 found 4 days ago
Tue, Sep 22 - Thu, Sep 24
BWN
Brunei Intl.
SIN
Changi
$759 Roundtrip, found 8 hours ago
$759
Roundtrip
found 8 hours ago
Select Royal Brunei Airlines flight, departing Tue, Sep 22 from Brunei Intl. to Changi, returning Thu, Sep 24, priced at $759 found 8 hours ago
Sat, May 16 - Sun, May 17
BWN
Brunei Intl.
SIN
Changi
$759 Roundtrip, found 6 days ago
$759
Roundtrip
found 6 days ago
Select Royal Brunei Airlines flight, departing Sat, May 16 from Brunei Intl. to Changi, returning Sun, May 17, priced at $759 found 6 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.