Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Medan to Oman as you normally would.
If you book a flight to Oman from Medan, you will be flying from Kuala Namu Intl, which is the city’s only airport. Medan Kuala Namu Intl (KNO) is located 23.8 km from the centre of Medan.
These are just IATA (International Air Transport Association) codes. They are used in aviation to identify and differentiate airports. That’s why a Medan Kuala Namu Intl Airport to Muscat Seeb Airport flight would often be abbreviated as a KNO to MCT flight. Salalah Airport (SLL), Sohar Airport (OHS), Khasab Airport (KHS), Fahud Airport (FAU), Lekhwair Airport (LKW) are other airports near this flight route and their unique identifiers/IATA codes.