Air fares Bangkok-Scandinavia-Bangkok

[Lung Per]

The air fares seem to be much higher for a roundtrip originating in Bangkok than one originating in Scandinavia. Can anyone advise where to by cheaper airline tickets, roundtrip FROM Bangkok? Name of travel agency, preferably website, street address, e-mail address. In Bangkok or anywhere else if web ticketing. Prefer Thai, SAS, or Finnair, but would also consider Emirates or others, except Aeroflot or any airline flying throug Heathrow. Please advise.

[Norseman]

Locked this one as it's a duplicate.