British Airways and Ryanair have cancelled hundreds of flights between the UK and parts of Europe and the US due to the coronavirus outbreak.The BA cancellations include journeys between Heathrow and Italy, France, Austria, Belgium, Germany, Ireland and Switzerland - plus New York's JFK.The airline has also cancelled flights between Gatwick and Italy, France and Albania - and London City flights to and from Italy and Germany - after another spike in COVID-19 cases in the UK.Ryanair cancellations especially affect flights to ItalyBA said the changes to its timetable as a result of the coronavirus outbreak would see "a number of flights merged between 16 March and 28 March".A spokesman for the airline said: "We will be contacting customers on cancelled flights so we can discuss their travel options, including re-booking onto other carriers where possible, full refunds or booking with BA for a later date of travel."Customers can also find the latest information and options on BA.com."Ryanair is reducing frequencies on some routes by up to 25%, particularly affecting flights to and from Italy.