How long does USPS take to deliver first class mail from California to Brunei?

Answer 1

The USPS does not deliver mail in Brunei.

International mail of various sizes can leave the US for Brunei in from 2 to 7 days, normally by air, but infrequently by sea. Letter mail would normally be processed there in from 3 to 7 days, but delivery varies greatly within the country, even given its small size.

Some parcels, even first class, may be delayed by Customs at Brunei, depending on the contents.

Answer 2

How long do USPS take to deliver first class mail from California to Brunei Darussalam

Answer 3

its take average 3 weeks (21 days). It might be take little long than 3 weeks.