Tehran Mehrabad, Kerman, and Istanbul are the top three Mahan Airlines airports based on our airline data. This may change if Mahan Airlines makes updates to their flight routes due to supply and demand.
Mahan Airlines does not have flights from Singapore Changi at the moment. There are scheduled flights with Mahan Airlines out of Bangkok Suvarnabhumi though (if you don’t mind flying from this airport). Flying with Ethiopian Air is recommended if you still want to fly from Singapore Changi.