About three weeks or earlier than that it depends on the shipping service.
How long it takes to mail USPS Priority International Mail from the US to Singapore will depend upon the exact location. It could cost around $10 just to mail a single letter.
It depends on how you ship it, and the weight of the parcel.
Mail there is somewhat inconsistent. I have sent things parcel post with the greatest consistency, and sent things Priority that took a lot longer.
No, ParcelPool is a Third-Party delivery service. They usually ship items to the Post Office aka USPS then for them to deliver them.
14 calendar days
it depends on how fast the ship is
It shouldn't take too long
4 days
5-7 days
4 to 6 days if all goes well!
5 days
usually 2-3 days...
Yes, USPS does but UPS and FedEx do not.