What is the flight time from Vientiane to Delhi?

A random search for flights from Kolkata (CCU) to Vientiane (VTE) shows:

OPTION 1: 6hr 45min via Bangkok (BKK)

CCU - BKK Jet Airways Flt 66 Dep 11:55am 30Apr,Fri

BKK - VTE Lao Airways Flt 425 Dep 06:50pm 30Apr,Fri

Flight Duration: 4hr 05min; Layover Time: 2hr 40min; Total Trip Time: 6hr 45min

A random search for flights from Mumbai (BOM) to Vientiane (VTE) shows:

OPTION 1: 8hr 20min via Bangkok (BKK)

BOM - BKK Jet Airways Flt 62 Dep 01:10am 30Apr,Fri

BKK - VTE Lao Airways Flt 424 Dep 09:40am 30Apr,Fri

Flight Duration: 5hr 45min; Layover Time: 2hr 35min; Total Trip Time: 8hr 20min