both the adults are senior citizens and child is 9 years old. travelling to Krabi from Delhi in Bangkok  they have connecting flight to Krabi arrival at Bangkok - Suvarnabhumi (BKK) is 16:20 hrs, 20 Dec 2022 by Indigo 6E 85 (A321) and departure to Krabi is by FD 4408 19: 20 hrs. so effectively they have 3 hrs. to change the flights. all the passengers have Thailand visa.