Red Bull said the Championship’s final races will be held in Kazan, Russia (June 15-16); Lake Balaton, Hungary (July 13-14); and Chiba, Japan (September 7-8).
[...]
t. Outside the aviation community, however, the races failed to attract the same level of interest as other Red Bull events. For this reason, Red Bull announced on Wednesday that its Air Race World Championship that began in 2003 will not continue after 2019.
Source:
Red Bull Cancels Air Race Series
www.flyingmag.com