I was wondering about this (and I am not trying to take away from their win, I am actually curious). I THINK the directions said you HAD TO get your tickets from a travel agent in the twon before getting on the train. They got tickets, but they were worthless. The ones they used they got in the twon with the airport. Yes, they had them before entering the airport, but I still think they got them in the wrong place. I find it interesting.
I am about to go write my recap so will be watching again. I guess I'll know for sure what the clue said after I rewatch