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

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Royal Brunei Airlines Flight 421 Route Deals From $228

The cheapest prices found with in the last 7 days for return flights were $360 and $228 for one-way flights to Changi for the period specified. Prices and availability are subject to change. Additional terms apply.

Sat, Feb 14 - Wed, Feb 18
BWN
Brunei Intl.
SIN
Changi
$360 Roundtrip, found 5 days ago
$360
Roundtrip
found 5 days ago
Select Royal Brunei Airlines flight, departing Sat, Feb 14 from Brunei Intl. to Changi, returning Wed, Feb 18, priced at $360 found 5 days ago
Fri, Mar 20 - Tue, Mar 31
BWN
Brunei Intl.
SIN
Changi
$364 Roundtrip, found 21 hours ago
$364
Roundtrip
found 21 hours ago
Select Royal Brunei Airlines flight, departing Fri, Mar 20 from Brunei Intl. to Changi, returning Tue, Mar 31, priced at $364 found 21 hours ago
Sat, Feb 14 - Wed, Feb 18
BWN
Brunei Intl.
SIN
Changi
$382 Roundtrip, found 5 days ago
$382
Roundtrip
found 5 days ago
Select Royal Brunei Airlines flight, departing Sat, Feb 14 from Brunei Intl. to Changi, returning Wed, Feb 18, priced at $382 found 5 days ago
Sun, Feb 22 - Thu, Feb 26
BWN
Brunei Intl.
SIN
Changi
$386 Roundtrip, found 19 hours ago
$386
Roundtrip
found 19 hours ago
Select Royal Brunei Airlines flight, departing Sun, Feb 22 from Brunei Intl. to Changi, returning Thu, Feb 26, priced at $386 found 19 hours ago
Fri, Mar 20 - Wed, Mar 25
BWN
Brunei Intl.
SIN
Changi
$408 Roundtrip, found 1 day ago
$408
Roundtrip
found 1 day ago
Select Royal Brunei Airlines flight, departing Fri, Mar 20 from Brunei Intl. to Changi, returning Wed, Mar 25, priced at $408 found 1 day ago
Sun, Feb 22 - Thu, Feb 26
BWN
Brunei Intl.
SIN
Changi
$501 Roundtrip, found 19 hours ago
$501
Roundtrip
found 19 hours ago
Select Royal Brunei Airlines flight, departing Sun, Feb 22 from Brunei Intl. to Changi, returning Thu, Feb 26, priced at $501 found 19 hours ago
Sun, Feb 22 - Thu, Feb 26
BWN
Brunei Intl.
SIN
Changi
$630 Roundtrip, found 19 hours ago
$630
Roundtrip
found 19 hours ago
Select Royal Brunei Airlines flight, departing Sun, Feb 22 from Brunei Intl. to Changi, returning Thu, Feb 26, priced at $630 found 19 hours ago
Sun, Feb 22 - Thu, Feb 26
BWN
Brunei Intl.
SIN
Changi
$632 Roundtrip, found 19 hours ago
$632
Roundtrip
found 19 hours ago
Select Royal Brunei Airlines flight, departing Sun, Feb 22 from Brunei Intl. to Changi, returning Thu, Feb 26, priced at $632 found 19 hours ago
Sat, Feb 14 - Wed, Feb 18
BWN
Brunei Intl.
SIN
Changi
$644 Roundtrip, found 5 days ago
$644
Roundtrip
found 5 days ago
Select Royal Brunei Airlines flight, departing Sat, Feb 14 from Brunei Intl. to Changi, returning Wed, Feb 18, priced at $644 found 5 days ago
Sun, Feb 22 - Thu, Feb 26
BWN
Brunei Intl.
SIN
Changi
$645 Roundtrip, found 19 hours ago
$645
Roundtrip
found 19 hours ago
Select Royal Brunei Airlines flight, departing Sun, Feb 22 from Brunei Intl. to Changi, returning Thu, Feb 26, priced at $645 found 19 hours ago
Sat, Feb 14 - Wed, Feb 18
BWN
Brunei Intl.
SIN
Changi
$663 Roundtrip, found 5 days ago
$663
Roundtrip
found 5 days ago
Select Royal Brunei Airlines flight, departing Sat, Feb 14 from Brunei Intl. to Changi, returning Wed, Feb 18, priced at $663 found 5 days ago
Sat, Feb 14 - Wed, Feb 18
BWN
Brunei Intl.
SIN
Changi
$685 Roundtrip, found 5 days ago
$685
Roundtrip
found 5 days ago
Select Royal Brunei Airlines flight, departing Sat, Feb 14 from Brunei Intl. to Changi, returning Wed, Feb 18, priced at $685 found 5 days ago
Thu, Mar 19 - Thu, Mar 26
BWN
Brunei Intl.
SIN
Changi
$706 Roundtrip, found 23 hours ago
$706
Roundtrip
found 23 hours ago
Select Royal Brunei Airlines flight, departing Thu, Mar 19 from Brunei Intl. to Changi, returning Thu, Mar 26, priced at $706 found 23 hours ago
Sun, Feb 22 - Thu, Feb 26
BWN
Brunei Intl.
SIN
Changi
$742 Roundtrip, found 19 hours ago
$742
Roundtrip
found 19 hours ago
Select Royal Brunei Airlines flight, departing Sun, Feb 22 from Brunei Intl. to Changi, returning Thu, Feb 26, priced at $742 found 19 hours ago
Sun, Feb 22 - Thu, Feb 26
BWN
Brunei Intl.
SIN
Changi
$744 Roundtrip, found 19 hours ago
$744
Roundtrip
found 19 hours ago
Select Royal Brunei Airlines flight, departing Sun, Feb 22 from Brunei Intl. to Changi, returning Thu, Feb 26, priced at $744 found 19 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.