Air­line pas­sen­gers might be tak­ing a clos­er look at the Sky­Mall mag­a­zine in the seat pock­et in front of them, as more air­lines add mobile pay­ment options. More than a third (36%) of air­lines plan to accept mobile pay­ments on-board flights with­in the next two years, accord­ing to a new sur­vey. Air­lines expect mobile pay­ment options to cre­ate extra rev­enue as more pas­sen­gers pay for a flight, buy an upgrade, buy in-flight goods, etc.