I have just booked business class award tickets for my cousin and his 3 daughters (aged 18, 20 and 21) from JFK to HKG to BKK. The 18 and 20 year old would like to know the minimum drinking age on Cathay Pacific flights (I assume that the 21 year old will not have an issue). Their father will be traveling with them and is not opposed to their having a glass of wine (but he would be sure they don't drink to excess). Does anyone know the official minimum drinking age on Cathay flights from JFK to HKG and from HKG to BKK?