PARIS—Airbus has broken records by launching the longest-range narrow-body jetliner at the Paris Airshow, but planemakers are having to rethink their mantra on comfort as they squeeze ever more miles out of jets designed for shorter trips.
Airbus and Boeing have been promoting new carbon-fiber long-haul aircraft such as the 787 Dreamliner and A350, which offer roomier cabins and help passengers avoid jet lag by providing a cabin pressure closer to that felt on the ground.
