Long car journeys, coach trips or even train rides I can usually go out for the count pretty easily. Planes, I dunno, I find it hard to get comfortable on them. I usually wake up every 30-40 minutes unless I completely sleep deprive myself for at least 24 hours prior. Then I'll be out for the count as soon as my head touches a pillow!

I have been saving the lions share of Pokémon for this trip though. So there's that.