The administrators for Monarch have confirmed that 1,858 employees have been made redundant.
Of these, 1,760 were employees of Monarch Airlines, while 98 were employed by Monarch Travel Group.
Between them the companies employed approximately 2,100 people. The rest have been retained to assist the administrators.
Partner at KPMG and joint administrator, Blair Nimmo, said: “We know that today has been a very sad and difficult day for the Monarch employees.
“Shortly before the appointment of the joint administrators, all employees received an email from the company confirming that it was about to enter administration.
“Following this, the absolute priority for me and my team was to try and make contact with all members of staff as soon as possible, in order that we could communicate what the administration means for them.
“Regrettably, with the business no longer able to fly, a significant number of redundancies were made.
“Over the coming days, my team will be doing all it can to assist the employees in submitting claims to the redundancy payments office for monies owed.”
Nimmo, Jim Tucker and Mike Pink from KPMG were appointed joint administrators to Monarch Airlines Limited and Monarch Travel Group early on Monday October 2.
The group’s engineering operation, Monarch Aircraft Engineering Limited, is not in administration and continues to trade normally.
Meanwhile, the CAA’s flying programme completed 61 flights in its first day of operation, returning 11,843 people to the UK.
With 13 days remaining and approximately 98,000 passengers still to bring back to the UK, the CAA is working with the government to deliver the replacement flying programme.
Today (Tuesday), the CAA plans to operate 58 flights, bringing more than 11,000 people back to the UK.
Andrew Haines, chief executive of the CAA, said: “I want to thank all those involved in organising this mammoth operation which has got off to a good start and to reaffirm our commitment to those passengers still abroad that we will get them back to the UK in the days ahead.
“Our website monarch.caa.co.uk has been updated with the latest information and our call centre has now taken in excess of 13,000 calls.”