The airline has assured passengers it is “confident” it will be granted approval of its restart plan and receive license approval.

Kingfisher has advised passengers that all future bookings have been suspended until further notice after the carrier’s flying licence was revoked for failing to renew it before its expiration.

India’s Civil Aviation Directorate-General chief Arun Mishra said the Indian carrier, which has been grounded since October last year, was advised by aviation regulators that its permit had “lapsed” for failing to provide “additional details” to a revival plan for its suffering financial situation, The Sydney Morning Herald reported.

Despite being warned to renew its licence prior to its expiration on 31 December 2012, the airline has assured passengers in an online statement that it is “confident” it will be granted approval of its restart plan and receive license approval.

“Despite the impending expiry of its License, there is no cause for concern as the regulations permit License renewal within two years of expiry,” the statement read.

Kingfisher was India’s second-largest airline over a year ago but now reportedly owes millions of dollars to banks, airport and staff.