Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Qatar to Saginaw as you normally would.
DOH stands for Doha Hamad Intl Airport, while DTW stands for Detroit Metropolitan Wayne County 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. Grand Rapids Gerald R. Ford Intl Airport (GRR), Flint Bishop Airport (FNT), Lansing Capital City Airport (LAN), Bay City MBS Intl Airport (MBS) are other airports near this flight route and their unique identifiers/IATA codes.