The decision to strike is a setback for management at Europe's largest low-cost carrier, who in recent months said they had largely resolved an industrial relations dispute with pilots and cabin crew.
One airline after another has expressed concerns about the ‘situation in Cairo’ without anyone being able to specify what they are talking about, putting Egypt-bound tourists in a fix.
British Airways and Lufthansa abruptly suspended flights to Cairo from Saturday citing security concerns but give no details about what may have prompted the move.
Both airlines have cited profitability and weak demand for cancelling their Teheran flights. The airlines started flying to the Iranian capital in the wake of the Iranian nuclear deal that was signed in 2015.
Britain's Prince William, the Duke of Cambridge, arrived in Jordan on Sunday as he began a five-day visit to the Middle East.
Ahead of the strike by by pilots, cabin crew and ground staff, the carrier advised travellers to postpone their trips until February 27 at no extra cost.
With at least 75,000 passengers stranded and 800 flights cancelled, the IT failure could see profits take a hit.
British Airways says it resumed some flights out of London's Heathrow and Gatwick airports after a computer systems failure caused chaos for thousands.
The airline said terminals at Heathrow and Gatwick had become extremely congested because of the IT failure and all BA flights scheduled before 1700 GMT had been cancelled.
Commuters used cars, boats, bicycles and buses to cope with a 24-hour walkout by underground station staff.
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