The Unite union has announced a fresh wave of strikes starting on May 18.
In total the union, which conducted a fresh ballott on industrial action last week, has said 20 days of strikes are planned over a 23 day period.
The right to take industrial expires one month after a ballott if no stries have taken place to Unite had to announce fresh walkouts beofore June 6
The latest industrial action, over cabin crew pay and conditions, will disrupt travel plans over the busy May bank holiday and half term periods. The strikes will end as the Fifa World Cup starts in South Africa.
The walkouts are planned to take place in four groups of five days with just one day inbetween.
Weekend reports speculated this was what Unite bosses were planning as it would cause maximum disruption to BA's contingency plans.
The confirmed dates of the strikes are: May 18 to 22, May 24 to 28, May 30 to June 3 and June 5 to 9, all inclusive.