Swiss International Air Lines in recent schedule update adjusted planned long-haul operations in summer 2017. Latest update as follow, note all effective dates listed below is based on Zurich departure.
Zurich – Bangkok 28MAR17 – 22APR17 3 of 7 weekly operates with A340-300, replacing 777-300ER
Zurich – Montreal 26MAR17 – 31MAY17 3 of 7 weekly (4 of 7 weekly in May) operates with 777-300ER, replaces A340-300
Zurich – San Francisco eff 17APR17 7 weekly service operates with 777-300ER, replacing 4 weekly A340 and 3 weekly 777
Zurich – Singapore eff 04MAR17 7 weekly service operates with 777-300ER, replacing 4 weekly A340 and 3 weekly 777
Additional changes remain highly possible.