Great question - PEN to LAX just means Penang Intl Airport to Los Angeles Airport. Now you’ll know what these unique codes when you look for flights! While you’re still figuring out your travel plans, it’s not a bad idea to learn the names and codes of other airports around these areas: Santa Ana J. Wayne/Orange Cnty Airport (SNA), Ontario Airport (ONT), Burbank Bob Hope Airport (BUR), Long Beach Municipal Airport (LGB), Hawthorne Airport (HHR).