Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Medan to Mumbai as you normally would.
KNO stands for Medan Kuala Namu Intl Airport, while BOM stands for Mumbai Chhatrapati Shivaji Intl 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.