Porting will take as little as 3 business days, and as long as 30 business days.
Most wireless numbers will port in 3 business days.
Landlines will typically port in 7 business days from major carriers, and 10-20 business days from smaller carriers.
Note that weekends and holidays are not considered business days.
If you send your request on a Friday afternoon, your number port request may not be approved until the following Wednesday afternoon.