I'm planning to book ticket to Saigon from Hyderabad on Thai Airlines. This is my preferable route because the actual airtime is just 6 hours compared to other routes. There is a layover of 1hr 15 min at Suvarnabhoomi airport to catch the flight to Ho Chi Minh City, is that sufficient ? This would be a single ticket on Thai Airlines.
On the other routes via Changi airport KL international airport both airtime and layover are longer.