Continuing this OT thread: It's not about the cost, it's about the opportunity cost and convenience for those who can either afford it or justify it.
They make sense for itins that are taking you from non-hub to non-hub; in these cases flying commercial will often mean a whole day spent connecting, with overnights in some cases.
The only person I personally know who has chartered jets didn't do that for business, but for personal use. They once took a group of people from Eureka, CA to Sedona, AZ for a weekend; left the house on the coast at 8am in the morning on Sat and got to the house at the destination around 10:30am, about 2 1/2 hours door to door. Flying commercial they would have connected a minimum of once and driven 120 extra miles or more, taking a total of at least 8 to 8 1/2 hours.
Obviously this cost a lot of money, but he can afford it, being worth mid-8-figures. I can't afford it, so I'll have to settle for a weekend bike ride with the family instead
