Ryanair, Southwest Push for More Efficient Boeing Jet

Ryanair Holdings Plc and Southwest Airlines Co., two of the biggest operators of Boeing Co. 737 single-aisle jets, are pushing the manufacturer for new engines to help cut fuel costs if an all-new model remains years away.

Fuel accounts for almost 40 percent of the airline’s expenses, and a manufacturer that could deliver a plane with 12 percent to 14 percent higher fuel efficiency would let Dublin-based Ryanair cut its costs per passenger by 10 percent to 12 percent, Chief Financial Officer Howard Millar said in a telephone interview.