All Singapore Airlines services from Europe to Da Nang operate with a stopover in Singapore, so your total travel time combines two sectors. From the United Kingdom, flights from London and Manchester typically involve a first sector of around 13h 10m to 13h 25m, followed by a Singapore–Da Nang flight of about 2h 50m, giving a total travel time of roughly 16h to 17h excluding transit time. From Germany, departures from Frankfurt and Munich include a 12h 10m to 12h 40m first leg, then around 2h 50m to Da Nang, for an overall airborne time of about 15h to 16h. From Italy, flights from Rome and Milan involve a 12h 20m to 12h 30m journey to Singapore, plus the 2h 50m onward segment, so you can expect around 15h to 16h in the air. From Turkey, the Istanbul–Singapore sector is about 10h 45m, plus 2h 50m to Da Nang, giving roughly 13h 30m of flying time. From Spain, Barcelona–Singapore takes around 13h 20m, then 2h 50m onward, adding up to about 16h 10m in the air. From Belgium, the Brussels–Singapore flight is around 12h 55m, plus 2h 50m to Da Nang, so about 15h 45m of flying. From Denmark, Copenhagen–Singapore is around 12h 30m, with the 2h 50m onward flight bringing total airtime to about 15h 20m. From Switzerland, Zurich–Singapore takes around 12h 40m, plus 2h 50m, for about 15h 30m in the air. From France, flights from Paris involve a 13h 05m to 13h 10m first sector plus 2h 50m onward, totalling around 16h of flying. From the Netherlands, Amsterdam–Singapore is around 13h 10m, followed by 2h 50m to Da Nang, for approximately 16h of airtime. Overall journey duration will also depend on your specific connection time in Singapore.