Cabin crew strikes at BA caused an 11.5% drop in traffic during May compared to the same month last year, the airline said today (June 3).
Premium passengers fell by 6.5% during the month while economy passengers dropped by 12.5%.
BA said capacity was down for the whole month by 4.7% but the strikes had caused a 6% drop over the last two weeks.
Load factor also fell by 5.4% to 69.7% compared with 2009.
BA said the strikes were losing it £7m a day.
But it added: "During the final strike period (due to start on June 5) we have planned for an increased flying programme as more crew ignore the strike and report for duty.
"We have announced that we are planning to fly about 80 per cent of our long haul programme including all JFK services and also all South African flights as we approach the World Cup."
The airline said that during May trading conditions continued to show improvement and it had started a new service on its OpenSkies subsidiary between Orly Airport, France and Washington DC.
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