Hard to answer as the minimum speed depends apron the a/c weight and FL and can vary up to 25 kts.
An A330-300 at around max landing weight at FL200 Min speed is about 220 KIAS ( Mach .5 ) and at FL 380 about 245 KIAS ( Mach .77 ) This is based on Green dot plus about 5 kts for mum dad and the kids!!