DUBLIN—Ryanair is bracing for its biggest-ever one-day strike on Aug. 10 with pilots based in five European countries set to walk out, forcing the cancellation of about one in six of its daily flights at the height of the holiday season.
Ryanair, which averted widespread strikes before Christmas by agreeing to recognize unions for the first time in its 30-year history, has been unable to quell rising protests since over slow progress in negotiating collective labor agreements.
