Yes they do fly from Singapore to Copenhagen.
Copenhagen, Denmark
The airlines that fly to Changi Airport in Singapore are Air China, Air France, Air India, Air Japan, Air Mauritius, Air Niugini, AirAsia Berhad, Airphil Express, Asiana Airlines, and Bangkok Airways.
1hr 50min to 1hr 55min London Gatwick (LGW) to Copenhagen (CPH) by a nonstop flight operated by Norwegian Air Shuttle, Climber Air or EasyJet.
Direct - Singapore Airlines, Jetstar, Air Asia, KLM, Qatar Airlines, Garuda
With Air Berlin, via Vienna: 4 h 10 min.
13hr 10min to 13hr 15min Singapore Changi (SIN) to Paris (CDG) by a nonstop flight operated by Air France or Singapore Airlines.
13hr 40min Singapore (SIN) to Paris (CDG) by a nonstop flight operated by Air France.
Budget airlines including (but not limited to) Air Asia.
In order to map a flight for you on Singapore Air to Incheon, S. Korea I need the location you would be departing from to know what route you would need to take to get there.
No. Currently Quantas do not fly from Dubai to Singapore. The following airlines fly from Dubai to Singapore: All Nippon Airways (NH) Egyptair (MS) Emirates (EK) Singapore Airlines (SQ)
Yes.
I am sure it is around 15 hours