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.
its take average 3 weeks (21 days). It might be take little long than 3 weeks.
First class mail is delivered in 3 to 5 days
First Class Mail is delivered in three to five days.
First Class Mail is delivered in three to five days.
First Class Mail is delivered in three to five days.
First Class Mail is delivered in three to five days.
First Class Mail is delivered in three to five days.
First Class Mail is delivered in three to five days.
By first class mail, 2-7 days.
First Class Mail is delivered in three to five days.
First Class Mail is delivered in three to five days.
First class mail is delivered in 3 to 5 days
First class mail delivery takes 3 to 5 days.