FILE PHOTO: A Delta Air Lines Boeing 737-800 plane sits at the gate at LAX airport in Los Angeles, California, U.S., April 1, 2018. REUTERS/Lucy Nicholson
FILE PHOTO: A Delta Air Lines Boeing 737 plane sits
FILE PHOTO: A Delta Air Lines Boeing 737-800 plane sits at the gate at LAX airport in Los Angeles, California, U.S., April 1, 2018. REUTERS/Lucy Nicholson