785 minutes, or 12 hours and 55 minutes.
Flight Duration: 13hr 40min; Layover Time: 2hr 30min; Total Trip Time: 16hr 10min
About 02hrs 20min to 02hrs 40min by a nonstop flight
A random search for flights from Singapore (SIN) to Brussels (BRU) shows: OPTION 1: 9hr 10min via Frankfurt (FRA) SIN - FRA Lufthansa Flt 779 Dep 11:05pm 16Jun,Wed FRA - BRU Lufthansa Flt 4570 Dep 07:20am 17Jun,Thu Flight Duration: 7hr 20min; Layover Time: 1hr 50min; Total Trip Time: 9hr 10min OPTION 2: 12hr 40min via Mumbai (BOM) [Cheaper Option] SIN - BOM Jet Airways Flt 011 Dep 07:10pm 16Jun,Wed/17Jun,Thu Connecting flight wait time 4hr 30min BOM - BRU Jet Airways Flt 228 Dep 02:20am 17Jun,Thu/18Jun,Fri Flight Duration: 8hr 10min; Layover Time: 4hr 30min; Total Trip Time: 12hr 40min
Dublin - Delhi 13hr 30min The following route takes 13hr 30min DUB - LHR bmi Flt 130 Dep 05:35pm LHR - DEL Jet Airways Flt 121 Arr 09:45am next day Flight Duration: 11hr 40min; Layover Time: 1hr 50min; Total Trip Time: 13hr 30min Dublin - Mumbai 15hr 25min
15/105 = 1/10 is the fraction of time he spends cleaning his room
A random search for flights from London Heathrow (LHR) to Rio de Janeiro (GIG) shows:OPTION 1: 15hr 30min via Paris (CDG)LHR - CDG Air France Flt 1681 Dep 06:00pm 11Dec,FriCDG - GIG Air France Flt 0442 Dep 11:20pm 11Dec,FriFlight Duration: 12hr 20min; Layover Time: 3hr 10min; Total Trip Time: 15hr 30minOPTION 2: 15hr 40min via Paris (CDG)LHR - CDG British Airways Flt 316 Dep 03:15pm 11Dec,FriCDG - GIG TAM Linhas Aereas Flt 8055 Dep 08:00pm 11Dec,FriFlight Duration: 13hr 10min; Layover Time: 2hr 30min; Total Trip Time: 15hr 40min
22hr 40min by the following route: AKL - DXB Emirates Airlines Flt 436 Dep 05:15pm 05Jun,Fri DXB - DOH Qatar Airways Flt 105 Dep 06:55am 06Jun,Sat Flight Duration: 21hr 10min; Layover Time: 1hr 30min; Total Trip Time: 22hr 40min
Two-thirds of an hour is 40 minutes because 60 minutes/3=20min*2=40min.
CAI to FCO 03hr 25min to 03hr 40min by a nonstop flight operated by Alitalia or Egyptair.
A random search for flights from London Heathrow (LHR) to Lima (LIM) shows:OPTION 1: 16hr 10min via Madrid Barajas (MAD)LHR - MAD Iberia Flt 7447 Dep 07:40pm 11Dec,FriMAD - LIM Iberia Flt 7759 Dep 12:35am 12Dec,SatFlight Duration: 14hr 30min; Layover Time: 1hr 40min; Total Trip Time: 16hr 10min
A random search for flights from Goa (GOI) to Bangkok (BKK) shows:OPTION 1: 9hr 10min via Mumbai (BOM)GOI - BOM Jet Airways Flt 480 Dep 08:10am 20Nov,FriBOM - BKK Jet Airways Flt 068 Dep 12:50pm 20Nov,FriFlight Duration: 5hr 20min; Layover Time: 3hr 40min; Total Trip Time: 9hr 10min
A random search for flights from Mumbai (BOM) to Paris (CDG) shows: OPTION 1: 9hr 10min Nonstop BOM - CDG Air France Flt 217 Dep 02:25am 11Jun,Fri Flight Duration: 9hr 10min OPTION 2: 13hr 25min via Delhi (DEL) [Cheapest Option] BOM - DEL Indian Airlines Flt 806 Dep 07:00am 11Jun,Fri DEL - CDG Air India Flt 143 Dep 11:35am 11Jun,Fri Flight Duration: 10hr 45min; Layover Time: 2hr 40min; Total Trip Time: 13hr 25min