Looking to go ORD-->PHL-->Zurich, and layover is 1hr 15 minutes which makes me a bit nervous. Has anyone done this or have an opinion? It would make our itinerary a bit cheaper and way easier to fly into Zurich; we are starting in Switzerland and ending in Venice, so I can also get round-trip to Venice with direct flights both ways. Downsides are longer travel time to start in Interlaken, higher train cost and more expensive flights by about $200-$250. (I've also looked at Milan and it doesn't seem like a great option for a few different reasons) Thanks!