u/Express-Way9295

We are looking at a one-way NZ/Australia cruise in February or March 2027. Either start in Aukland and end in Sydney or vice-versa. We are planning to book flights in Premium Economy, but checking prices in that time range gives me sticker shock. When would be the best time to book flights for Feb/March 2027? And is better to book two one-ways or a Multi-City ticket? TIA!