These US Airline Cabins Have The Widest Economy Seats In 2026 … by Republic Airways, and the Embraer 175, flown by both Republic … cm) Delta Air Lines Embraer 170; Embraer 175 18.3 inches … 46.48 cm) United Airlines Embraer 170; Embraer 175 18.2 inches … areas of aviation, from aircraft design to onboard technology, seating …