Flight time from Ho Chi Minh City to Khost. Get exact flying time between Tan Son Nhat International Airport, Ho Chi Minh City, Vietnam and Khost Airport, Khost, Afghanistan. Direct flight time, one stop & 1+ stop flight time between Ho Chi Minh City & Khost. Ho Chi Minh City Airport to Khost Airport (SGN to KHT) flight duration and operating airlines.