Good news perhaps for the summer. On the website of the Dutch embassy in Bulgaria this press-release:

"Bulgarian flagcarrier Balkan Air Tour will launch direct flights to Amsterdam twice a week as of 4 May. This became possible after the company signed a cooperation agreement with KLM Royal Dutch Airlines. The agreement allows for direct flights to most KLM and partners' destinations and for flights with a stopover to cities across Europe, USA, Canada, South Africa and the Far East."

See the original press release too (notice the typical Dutch photo). They are looking for pilots too.