Dhaka, Jan. 8 -- Bangladesh's state-run airline feels incapacitated to increase flight frequencies and fly to potentially profitable new international destinations, belying rising passenger demand and revenue growth, sources say.

Biman Bangladesh Airlines is caught in such a paradox because the national airline has received no response from international lessors despite issuing tenders multiple times in recent years.

On the other hand, the aviation authorities have also failed to finalize any plane-purchase order with aircraft manufacturers over the past five years.

"We attempted three to four times over the past few years to lease aircraft but received no response from the lessors," Boshra Islam, Biman's spokesperson, told The Financi...