In a few weeks for half term we are going to South Africa. The flight is about 11-12 hours to Petronia. None of my boys are dry at night and all wear a pull up or nappy at night. My 4 year old I will defently put in a pull up as he is nat long trained. My 5 year old should also wear one. However my oldest two are 10 and 12 and may be embarrassed to wear their pull ups even though they will wet themselvs if they fall asleep.