The Chief Executive of British Airways has apologised "profusely" to passengers who experienced "hardship" over the weekend as flights were cancelled after an IT glitch.
Alex Cruz denied the outsourcing of British Airways jobs was to blame for a "catastrophic" IT failure that brought the airline's operations to a halt.
He further offered assurances that no customer data or any list, including terror watch lists, had been compromised by the glitch.
Travellers face more cancellations at Heathrow on the third day of disruption since the IT glitch.
Display boards showed some flights cancelled, including planes to Copenhagen and Amsterdam.
The other cancellations were domestic flights to Glasgow, Aberdeen, Manchester, Leeds Bradford and Dublin.
While a number of weary-looking passengers filled the benches by departures, for the majority check-in seemed to be going smoothly.