Alhamdulillah, second trimester is actually the safest time to fly kalau kena pergi! Most airlines allow pregnant mums up to 32-36 weeks, tapi sebaiknya check dengan airline dulu and of course confirm dengan doctor yang tengok you, terutama untuk memastikan everything is progressing normally. A few of my mum friends flew during second trimester without issues, just make sure you move around in the plane, stay hydrated, and duduk aisle seat so boleh go to toilet easier. Balik kampung awal Desember should be fine timing-wise, but do get your doctor's clearance first, especially kalau ada any concerns with your pregnancy. Safe travels, sis!