LONDON — British authorities are scrambling to bring home 110,000 travelers after Monarch Airlines collapsed Monday, cancelling all flights by what had been Britain’s fifth biggest carrier with 2,100 employees.

The Civil Aviation Authority said it has leased 30 aircraft to transport Monarch customers scattered around holiday destinations ranging from Turkey to Spain and Sweden. Flights will be provided at no additional cost to passengers.

“This is a hugely distressing situation for British holidaymakers abroad, and my first priority is to help them get back to the U.K.,” Transport Secretary Chris Grayling said in a statement.

Some 860,000 customers in all are affected, with 750,000 with future bookings.

Monarch ceased operations after failing to reach a deal with regulators to extend the company’s license to sell package holidays to overseas destinations.

The CAA is advising Monarch customers who are trying to get home from abroad to visit the agency’s website for information about their flights. Passengers who were preparing to leave the U.K. on Monarch flights should not go to the airport.

KPMG partner Blair Nimmo said administrators are now considering breaking up the company as no buyer has been found.