BRUSSELS – Ryanair Holdings PLC’s chief executive Tuesday said the Irish budget airline was unlikely to place a big order for new aircraft with Boeing Co., a move that could harm its prospects for fut BRUSSELS – Ryanair Holdings PLC’s chief executive Tuesday said the Irish budget airline was unlikely to place a big order for new aircraft with Boeing Co., a move that could harm its prospects for future growth. “Sadly, the deal is now highly unlikely to happen,” Chief Executive Michael O’Leary said in an interview. Ryanair is one of Boeing’s biggest airline customers. It has b...