Drukair Royal Bhutan Airlines in recent schedule filing in the OAG filed winter 2019/20 schedule, which would see the airline adding 3rd weekly flight to Singapore. Based on filing, the 3rd weekly will be operating as Paro – Bangkok – Singapore routing, from 02DEC19.
KB550 PBH0805 – 1215BKK1315 – 1645SIN 319 1
KB551 SIN0615 – 0745BKK0845 – 1045PBH 319 2
Separately, the airline’s listing also shows nonstop terminator Paro – Bagdogra service with ATR42 from 02DEC19, replacing 2 weekly Paro – Bagdogra – Bangkok A319 service.