Originally Posted by jozdemir

If you're not checking bags you could do it...but the biggest hold up you could encounter would be the immigration lines - occasionally I've been lucky but more often than not when I haven't been lucky enough to get a fast track pass I've had to wait for 30 minutes+ to get through BKK immigration.

Definitely doable - I know I would go for the 2 hour connection personally but I've also been through BKK airport a fair few times so I know where I'm going.

No reason you couldn't ask the check-in agent assuming you made it in time to see if they can get you on the earlier flight though if you took the 4h20 connection. Not saying they would do it, but I know I would at least ask if it were me.