Aer Lingus is suspending services between Belfast and London due to Brexit.
The carrier has said it will stop flying between George Best Belfast City Airport and Heathrow at the end of the month.
Instead, its sister airline, British Airways, will start operating three flights a day between the airports over the winter months.
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Aer Lingus will stop flying the route because its Air Operator Certificate expires at the end of October, according to trade union Forsa.
Because it is an Irish carrier, it can no longer operate services on UK domestic routes without it since Brexit, Travel Weekly reported.
The last service from the airline will be next Sunday.
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