Prime Minister Sheikh Hasina is set to fly to Bhutan with small Druk Air plane instead of Biman Bangladesh Airlines as the latter does not have a certified pilot who can handle Paro, one of the most challenging airports in the world. 
The prime minister is scheduled to go to Bhutan on April 18 on a three-day visit.
Though Prime Minister Hasina stopped using Biman for a short period of time over two incidents - one involving an emergency landing in Turkmenistan in January and the other was in June last year when the landing of a Biman flight carrying the premier was delayed by 45 minutes during her visit to Jakarta in March. 
She also flew with Biman during her recently concluded India trip from April 7 to 10. 
But, for her trip to the Himalayan kingdom, Hasina is not using Biman as there is no Bangladeshi certified pilot to fly into Paro, Bhutan’s sole international airport. 
Only a handful of pilots are certified to land at the airport situated in a deep valley on the bank of the Paro River and about 7,920ft from the sea level.
Also surrounded by steep peaks as high as 18,000ft, the airport is considered as one of the most challenging airports in the world for landing and takeoff.
According to experienced pilots of Biman, flights to and from Paro are allowed only under visual meteorological conditions meaning pilots have to make their judgements by their eyes rather than instruments. And, flights to and from Paro are only allowed in daylight. 
Only two Bhutanese airliners – Druk Air and Bhutan Airlines – operate to and from the airport with relatively smaller aircraft.
“Yes, the prime minister is flying to Bhutan on Druk Air, not Biman,” confirmed a senior foreign ministry official while talking to newsmen in Dhaka.