One will find a few conveyance options (such as bus) to the district of Bumthang in general and may have to transfer to Jakar by cab/car.
Bhutan's national carrier, Druk Air and Bhutan Airlines both provide international flights to its international airport at Paro. ( It is to be kept in mind that due to the changeable weather conditions and the fact that Paro Airport can only operate during daylight hours, delays might occur. Travellers are advised to keep sufficient time at hand for connecting flights). A flight from Paro to Bumthang shall land at Bathpalathang Aiprort situated right in the town of Jakar. Tashi Air and Druk Air both provide domestic flights.
It is advisable to take a hired car as the sacred sites and tourist spots are spread over the entire area. There are taxis available for the purpose.