Bangladesh authorities have banned Indian budget carrier SpiceJet from its airspace over unpaid air navigation fees.
This has caused the airline to reroute some eastbound flights departing from Kolkata.
It has been affecting its services to Guwahati and Imphal, among others.
According to flight tracking, avoiding Bangladesh airspace on these routes adds more time and fuel burn.
SpiceJet has been in financial troubles for some time.
It posted a $30 million loss in the last quarter and at one point had half of its fleet grounded over engine and other maintenance issues.
The airline said it is in ongoing discussions with Bangladeshi authorities to resolve the issue as soon as possible.
The fees are paid by all airlines for using airspace and for air traffic management services.
