My partner recently traveled on Cathay Pacific from Toronto to Denpasar via Hong Kong on a Canadian passport. At the check-in desk, the agent demanded proof of onward travel from Bali. While we had something booked, all that information was with me and not with him (he was traveling alone). The agent said “you are not traveling today.” At this point it was nighttime where I was, and he couldn’t get a hold of me and was scrambling what to do. This article will explain the requirement for proof of onward travel, and what to do if you encounter a problem with it, and help you avoid being denied boarding.