There are many "versions" of facelifting surgeries and most involve tightening of the SMAS (muscle layer of the face). Some are much more aggressive, or may involve more dissection (scary word!!)
Also the tissues and anatomy of people greatly varies due to heredity and aging, for example. How much swelling and discomfort varies, too. So it is very difficult to predict in an individual patient how long their swelling and healing will take.
As a very general average, we have found that most of our facelift patients are able to return to many of their activities (driving, work, some social activities, etc) at about 2 weeks from surgery, as long as the healing is "average".