I was trying to find some rare route with SWISS Airlines and while one-way ticket was find, there were problems finding return trip on that route. SWISS informed me, that in this case I can fill out time table form to check, when their planes are flying on my return route. Well... I did so and this is, what I have found...
Well... what to say... it seems, that certainly SWISS is not flying on my return route.
If you don't believe, this is actually happening, then you can easily replicate my steps. Visit swiss.com, pick Fly > Timetable, pick any route and dates and finally hit Display connections. Bum! Voila...