Flights operated by Biman Bangladesh Airlines from Dhaka to London, Toronto, and Rome are currently taking one to two hours longer than scheduled due to rerouting caused by the ongoing tensions between India and Pakistan, airline officials said.

The impact of the airspace restrictions has not been limited to Biman.

Several other international airlines operating to and from Hazrat Shahjalal International Airport, including Turkish Airlines and Jazeera Airways, have also rerouted or diverted flights bound for or departing from Dhaka in recent days.

The disruptions stem from airspace restrictions following a recent escalation in tensions between the two South Asian neighbours.

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, forcing carriers to adopt longer routes for flights between South Asia and destinations in Europe and North America.

Biman officials said that although flights over India are operating normally, the closure of Pakistani airspace has forced aircraft to take detours, leading to increased flight durations.

A Biman Bangladesh Airlines captain said it earlier took around 10 hours to go to London from Dhaka as they used Pakistan and Afghanistan airspace.

"Due to change of flight path, it is now taking 11 to 12 hours to reach London," the Biman captain said, wishing not to be named.

An additional one hour is needed to go to Rome and Toronto, said a Biman official from central control.

"From the very beginning of the India-Pakistan conflict, the flight operation department has carried out thorough study and risk assessment and finalised the flight plan on these affected routes," a Biman official said.