Royal Brunei Airlines Flight 421 Deals & Information (2025/2026)

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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 $359 and $227 for one-way flights to Changi for the period specified. Prices and availability are subject to change. Additional terms apply.

Wed, Aug 6 - Wed, Aug 13
BWN
Brunei Intl.
SIN
Changi
$359 Roundtrip, found 20 hours ago
$359
Roundtrip
found 20 hours ago
Select Royal Brunei Airlines flight, departing Wed, Aug 6 from Brunei Intl. to Changi, returning Wed, Aug 13, priced at $359 found 20 hours ago
Fri, Jul 25 - Sun, Aug 3
BWN
Brunei Intl.
SIN
Changi
$360 Roundtrip, found 2 days ago
$360
Roundtrip
found 2 days ago
Select Royal Brunei Airlines flight, departing Fri, Jul 25 from Brunei Intl. to Changi, returning Sun, Aug 3, priced at $360 found 2 days ago
Mon, Jul 14 - Wed, Jul 16
BWN
Brunei Intl.
SIN
Changi
$362 Roundtrip, found 4 days ago
$362
Roundtrip
found 4 days ago
Select Royal Brunei Airlines flight, departing Mon, Jul 14 from Brunei Intl. to Changi, returning Wed, Jul 16, priced at $362 found 4 days ago
Fri, Jul 25 - Sun, Aug 3
BWN
Brunei Intl.
SIN
Changi
$410 Roundtrip, found 2 days ago
$410
Roundtrip
found 2 days ago
Select Royal Brunei Airlines flight, departing Fri, Jul 25 from Brunei Intl. to Changi, returning Sun, Aug 3, priced at $410 found 2 days ago
Fri, Jun 27 - Sun, Jun 29
BWN
Brunei Intl.
SIN
Changi
$533 Roundtrip, found 3 days ago
$533
Roundtrip
found 3 days ago
Select Royal Brunei Airlines flight, departing Fri, Jun 27 from Brunei Intl. to Changi, returning Sun, Jun 29, priced at $533 found 3 days ago
Mon, Jul 14 - Wed, Jul 16
BWN
Brunei Intl.
SIN
Changi
$547 Roundtrip, found 4 days ago
$547
Roundtrip
found 4 days ago
Select Royal Brunei Airlines flight, departing Mon, Jul 14 from Brunei Intl. to Changi, returning Wed, Jul 16, priced at $547 found 4 days ago
Mon, Jul 14 - Wed, Jul 16
BWN
Brunei Intl.
SIN
Changi
$582 Roundtrip, found 4 days ago
$582
Roundtrip
found 4 days ago
Select Royal Brunei Airlines flight, departing Mon, Jul 14 from Brunei Intl. to Changi, returning Wed, Jul 16, priced at $582 found 4 days ago
Fri, Jul 25 - Sun, Aug 3
BWN
Brunei Intl.
SIN
Changi
$591 Roundtrip, found 2 days ago
$591
Roundtrip
found 2 days ago
Select Royal Brunei Airlines flight, departing Fri, Jul 25 from Brunei Intl. to Changi, returning Sun, Aug 3, priced at $591 found 2 days ago
Tue, Jul 15 - Fri, Jul 18
BWN
Brunei Intl.
SIN
Changi
$593 Roundtrip, found 5 days ago
$593
Roundtrip
found 5 days ago
Select Royal Brunei Airlines flight, departing Tue, Jul 15 from Brunei Intl. to Changi, returning Fri, Jul 18, priced at $593 found 5 days ago
Fri, Jul 25 - Sun, Aug 3
BWN
Brunei Intl.
SIN
Changi
$593 Roundtrip, found 2 days ago
$593
Roundtrip
found 2 days ago
Select Royal Brunei Airlines flight, departing Fri, Jul 25 from Brunei Intl. to Changi, returning Sun, Aug 3, priced at $593 found 2 days ago
Mon, Jul 14 - Wed, Jul 16
BWN
Brunei Intl.
SIN
Changi
$595 Roundtrip, found 4 days ago
$595
Roundtrip
found 4 days ago
Select Royal Brunei Airlines flight, departing Mon, Jul 14 from Brunei Intl. to Changi, returning Wed, Jul 16, priced at $595 found 4 days ago
Fri, Jun 27 - Sun, Jun 29
BWN
Brunei Intl.
SIN
Changi
$623 Roundtrip, found 3 days ago
$623
Roundtrip
found 3 days ago
Select Royal Brunei Airlines flight, departing Fri, Jun 27 from Brunei Intl. to Changi, returning Sun, Jun 29, priced at $623 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.