When flying from Penang to Omaha, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
PEN stands for Penang Intl Airport, while OMA stands for Omaha Eppley Airfield Airport. These codes are often called IATA codes, a set of identifiers established by IATA (International Air Transport Association) that is widely used by airlines and the aviation industry.