How long does USPS Priority international Mail from US to Singapore?

It usually takes about 6 to 10 business days excluding week ends.

Express mail international is estimated 3-5 days. You also should have a tracking number that will look like this: EA 123 456 789 US

It often takes at least a week to receive a parcel from India. I placed an order for a package through express USPS international mail, but it took almost five days for my package just to clear...

first class international mail 2-3 Weeks

It takes anywhere from 10-14 days, I sent mail & he received it within 12 days,which is within normal guidelines of the mail delivery there. Hope this helped ! :)