Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Rotorua to Moscow as you normally would.
For a flight from Rotorua to Moscow, you will be flying from Rotorua. Rotorua (ROT) is just 7.1 km from the centre of the city. Rotorua is the only Rotorua airport and it handles 0 outbound flights to Moscow per day. 0 airlines have flights to Moscow from Rotorua on a regular basis.