FILE PHOTO: A Southwest Airlines Boeing 737-800 plane is seen at Los Angeles International Airport (LAX) in the Greater Los Angeles Area, California, U.S., April 10, 2017. Picture taken April 10, 2017. REUTERS/Lucy Nicholson
FILE PHOTO: A Southwest Airlines Boeing 737-800 plane is seen at Los Angeles International Airport (LAX) in the Greater Los Angeles Area, California, U.S., April 10, 2017. Picture taken April 10, 2017. REUTERS/Lucy Nicholson