The airline SWISS has had to cancel further flights due to the weather. Twelve individual flights were cancelled on Saturday alone, a spokesperson told the Keystone-SDA news agency. +Get the most important news from Switzerland in your inbox The flights affected on Saturday are return flights from Zurich to Nice (France), Frankfurt (Germany), Düsseldorf (Germany), London (United Kingdom), Milan (Italy) and Luxembourg, the airline said. SWISS is also expecting an average arrival delay of 1.5 hours for all aircraft destined for Zurich’s Kloten Airport on Saturday. The de-icing of aircraft, which is particularly necessary in the current weather conditions, is contributing to the delays, said the SWISS spokesperson. It is also possible that further adjustments will have to be made during the course of the day. + Freezing conditions force SWISS to cancel flights As of Saturday morning, a total of 93 Swiss flights have had to be cancelled due to the weather since the start of the year.