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

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Royal Brunei Airlines Flight 421 Route Deals From $244

The cheapest prices found with in the last 7 days for return flights were $390 and $244 for one-way flights to Changi for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, Sep 8 - Sat, Sep 12
BWN
Brunei Intl.
SIN
Changi
$390 Roundtrip, found 15 hours ago
$390
Roundtrip
found 15 hours ago
Select Royal Brunei Airlines flight, departing Tue, Sep 8 from Brunei Intl. to Changi, returning Sat, Sep 12, priced at $390 found 15 hours ago
Sun, Sep 20 - Fri, Sep 25
BWN
Brunei Intl.
SIN
Changi
$391 Roundtrip, found 11 hours ago
$391
Roundtrip
found 11 hours ago
Select Royal Brunei Airlines flight, departing Sun, Sep 20 from Brunei Intl. to Changi, returning Fri, Sep 25, priced at $391 found 11 hours ago
Mon, Sep 7 - Sun, Sep 13
BWN
Brunei Intl.
SIN
Changi
$411 Roundtrip, found 4 days ago
$411
Roundtrip
found 4 days ago
Select Royal Brunei Airlines flight, departing Mon, Sep 7 from Brunei Intl. to Changi, returning Sun, Sep 13, priced at $411 found 4 days ago
Tue, Sep 8 - Sat, Sep 12
BWN
Brunei Intl.
SIN
Changi
$412 Roundtrip, found 15 hours ago
$412
Roundtrip
found 15 hours ago
Select Royal Brunei Airlines flight, departing Tue, Sep 8 from Brunei Intl. to Changi, returning Sat, Sep 12, priced at $412 found 15 hours ago
Tue, Sep 8 - Sat, Sep 12
BWN
Brunei Intl.
SIN
Changi
$433 Roundtrip, found 15 hours ago
$433
Roundtrip
found 15 hours ago
Select Royal Brunei Airlines flight, departing Tue, Sep 8 from Brunei Intl. to Changi, returning Sat, Sep 12, priced at $433 found 15 hours ago
Mon, Sep 7 - Sun, Sep 13
BWN
Brunei Intl.
SIN
Changi
$547 Roundtrip, found 4 days ago
$547
Roundtrip
found 4 days ago
Select Royal Brunei Airlines flight, departing Mon, Sep 7 from Brunei Intl. to Changi, returning Sun, Sep 13, priced at $547 found 4 days ago
Tue, Sep 8 - Sat, Sep 12
BWN
Brunei Intl.
SIN
Changi
$594 Roundtrip, found 15 hours ago
$594
Roundtrip
found 15 hours ago
Select Royal Brunei Airlines flight, departing Tue, Sep 8 from Brunei Intl. to Changi, returning Sat, Sep 12, priced at $594 found 15 hours ago
Sun, Sep 20 - Fri, Sep 25
BWN
Brunei Intl.
SIN
Changi
$596 Roundtrip, found 11 hours ago
$596
Roundtrip
found 11 hours ago
Select Royal Brunei Airlines flight, departing Sun, Sep 20 from Brunei Intl. to Changi, returning Fri, Sep 25, priced at $596 found 11 hours ago
Mon, Sep 7 - Sun, Sep 13
BWN
Brunei Intl.
SIN
Changi
$635 Roundtrip, found 4 days ago
$635
Roundtrip
found 4 days ago
Select Royal Brunei Airlines flight, departing Mon, Sep 7 from Brunei Intl. to Changi, returning Sun, Sep 13, priced at $635 found 4 days ago
Sun, Sep 20 - Fri, Sep 25
BWN
Brunei Intl.
SIN
Changi
$763 Roundtrip, found 11 hours ago
$763
Roundtrip
found 11 hours ago
Select Royal Brunei Airlines flight, departing Sun, Sep 20 from Brunei Intl. to Changi, returning Fri, Sep 25, priced at $763 found 11 hours ago
Sun, Sep 20 - Fri, Sep 25
BWN
Brunei Intl.
SIN
Changi
$782 Roundtrip, found 11 hours ago
$782
Roundtrip
found 11 hours ago
Select Royal Brunei Airlines flight, departing Sun, Sep 20 from Brunei Intl. to Changi, returning Fri, Sep 25, priced at $782 found 11 hours ago
Sun, Sep 20 - Fri, Sep 25
BWN
Brunei Intl.
SIN
Changi
$784 Roundtrip, found 11 hours ago
$784
Roundtrip
found 11 hours ago
Select Royal Brunei Airlines flight, departing Sun, Sep 20 from Brunei Intl. to Changi, returning Fri, Sep 25, priced at $784 found 11 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.