Originally Posted by
railways
This page might help.
For example (round-trip, business):
AMS-BKK: EUR 1,160
CPH-BKK: EUR 1,200 (approx)
can't find a date for AMS-BKK at EUR 1.160 for less than one month travel
best I can find is EUR 1.736
CDG-BKK at Eur 1350 might be a good deal however.