The cheapest flight to Zürich you can get by boooking 51 days before departure.
The most popular airlines on the route Porto - Zürich: TAP Air Portugal (TP), Swiss (LX), Vueling (VY).
The cheapest flights you can book on the route Francisco de Sa Carneiro (OPO) - Kloten (ZRH).
Direct flights last about 2h 25min.
Direct flights available 4 days a week - Monday, Friday, Saturday, Sunday.
Direct flights: Swiss (LX), TAP Air Portugal (TP), Vueling (VY).