$6,500 is a deal. Try booking private a 767 from LA to Dallas.
“The narrowest wide body in service, the Boeing B-767 features an impressive range and a cabin unique in its width, typically seating 7 abreast in economy configuration. In addition to seating 326 passengers, one of the most in the class, the 767 boasts a fast cruising speed of 459 mph.
The average hourly rental rate of the Boeing 767-300ER is around 20,800 USD per hour.”
https://www.paramountbusinessjets.com/aircraft/boeing-767.html
Those prices are for non-conflict zone flights. Also the price includes idle time while on the ground.