The costs involved in renting a private jet range from $1000 per hour to around $6000 per hour. The biggest difference in price is dependent on the size of the jet and the amenities. Today the costs of a first class ticket or business class ticket are fairly high, so it isn't much of a bump up in price to rent a jet aircraft. If you are sending several people to one location then the hourly cost becomes very reasonable.
Jets for charter also provide a greater since of security these days. There is no threat of terrorist taking control of a private jet. If you are tired of arriving at the airport hours in advance then securing a private jet for charter is an alternative.
The standard of service is usually much better than on commercial airlines. If you need to travel in luxury or you don't want others to know your travel plans then selecting a jet for charter is definitely the way to go. Many celebrities fly private charter jets to escape the cameras and the media.
If you are on a business trip, you could hold proper meetings inside the chartered private jets, and hence, actually continue working as if you were in office. You can make in-flight calls to your business associates or your employees/colleagues/ sub-ordinates etc. Flexibility with regards to organising your time, can sometimes make a big difference to your business. Swift movement of key people can help you win new business.