Monarch Airlines, the UK’s fifth largest airline, has suddenly ceased operations, leaving more than 100,000 passengers stranded at airports, said a report.

"We are sorry to inform you that, as of October 2, 2017, all future holidays and flights provided by these companies have been cancelled and are no longer operating," The Telegraph reported citing a statement released by the airline.

The British air carrier filed for bankruptcy earlier yesterday after nearly five years of disorder.

In addition to the 100,000 passengers immediately affected, half-a million customers have bookings with the airline in the coming months. The airline also employs nearly 2,500 staff.

According to the statement, the following companies have ceased trading and now entered administration:

• Monarch Airlines Ltd
• Monarch Holidays Ltd (ATOL Number 2275)
• First Aviation Ltd (ATOL Number 4888) previously trading as Monarch Airlines
• Avro Ltd (ATOL Number 1939)
• Somewhere2stay Ltd

"This is an unprecedented situation and because there are up to 110,000 passengers abroad, the UK Government has asked the Civil Aviation Authority (CAA) to coordinate flights back to the UK for all Monarch customers currently overseas. These new flights will be at no extra cost to you," the carrier said.

Customers due to depart from a UK airport with Monarch Airlines in the future have been advised not to travel to the UK airport as the flight will not be operating.