I know someone who recently bought a package trip for their family to Ko Samui (as their first stop). It was their first trip to SE Asia. They live NE London.

Flight sold was Qatar / BKP. LHR - DOH - BKK - USM (Samui).

They're currently somewhere in Thailand and loved the flights (economy) despite the - for me - unpleasant break in the journey in Doha.