We're flying at 1pm from Bangkok to Luang Prabang on Bangkok Airways on Thursday January 21st, so its an international flight. Is it sufficient to arrive at Suvarnabhumi 2 hours before the flight? We're staying at Centre Point Silom, which is near the river at the end of the skytrain, so I believe I should allow 1 hour for the drive.

Yes IMO that's plenty of time. Bangkok Airways check-in counters are not normally crowded and they have lounges where you can relax afterward.

that is exactly the time i allow and it is plenty....i like to get there early...

I normally leave my house about three hours before an international flight time, although it rarely takes more than 20 - 30 minutes to get to the airport. I like to arrive early, but I have access to lots of lounges at BKK. ;-)

On a side note: They now have big video screens mounted outside of immigration in the departure hall so you can see the queues inside both the immigration areas. Sometimes one area gets very crowded while the other has almost no waiting. Check the screens before you go into the areas.

Leaving Centre Point Silom three hours before your flight should be perfect. The Bangkok Air Lounge, available to all customers, is a pleasant place to wait.

Hey Michael, I didnt notice those screens GREAT tip, i'll remember that for next time!