Lifting the neck to create a better angle of the jawline is done by a variety of techniques. Every neck is different and each necklift must be tailored to the patients to include patients goals, risk tolerance, and tolerance for downtime. It is most important to do your research and choose a great doctor, understand the procedure, and clearly define your goals. Time in the operating room should be low on your level of concerns.
So far there are good answers to this question. I would say it really depends on what you need. A isolated submentoplasty may take me 45 minutes to an hour and a simple neck lift 1 and a half hours. A more involved procedure may take several hours. All of these procedures may be done under sedation or general anesthesia. The faster the surgery is not what counts! You want a good result so choose your doctor based on reputation and results! Good luck.
Neck lift is a generic term, so you really need to be specific when asking about surgical times. It would also depend on what other procedures you are having at the same time. In general, facial procedures take between 1.5 and 4 hours depending on if you are having neck only, muscle plication, facelift, etc. The length of surgery also depends on the type of anesthesia, surgeon's pace of operating and many other factors. Good Luck.