When flying from Qatar to Memphis, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
Memphis (MEM) is the airport you will fly into if you book a flight from Qatar to Memphis. It is only a 13.4 km journey from Memphis (MEM) to Memphis’s city centre.
This is defined as Doha Hamad Intl Airport (DOH) and Memphis Airport (MEM). Codes like Memphis Airport are often used to just call airports uniquely.