The British Airways strike next month is to cause at least five consecutive days of flight cancellations.
BA pilots announced three days of strikes – taking place on 9, 10 and 27 September – in a dispute over pay.
Despite the first strikes being on 9 and 10 September, some customers flying between the 8th and 12th have been told their flights have been cancelled – and to rebook or get a refund.
But some passengers said they had received cancellation emails in error.
After initially being informed their flights had been scrapped, they were then told their flights were going ahead.