Biman flights from Dhaka to London, Toronto, and Rome are currently taking one to two hours longer than usual because of rerouting amid the tensions between India and Pakistan, officials said.

Flights of Turkish Airlines and Jazeera Airways and several carriers that operate to and from Hazrat Shahjalal International Airport are also being rerouted.

The disruptions are caused by airspace restrictions: Pakistan has closed its airspace to Indian aircraft, prompting reciprocal measures from India.

As a result, several international airlines have begun avoiding the region's airspace, leading to longer routes for flights between South Asia and destinations in Europe and North America.

Flights over India are operating normally, but the closure of Pakistani airspace is forcing planes to take detours, Biman officials said.

A flight between Dhaka and London takes around 10 hours when the planes use Pakistan airspace, said a Biman captain.

But now the flight takes 11 to 12 hours, the captain said, wishing anonymity.

"At the very beginning of the recent India-Pakistan tensions, the flight operation department carried out a thorough risk assessment and finalised the flight plan," a Biman official said.