Macau is former Portuguese colony, nowadays one of two special regions of China. Macau is also known as "Chinese Las Vegas" due to the concentration of casinos and general tolerance of gambling. At this moment two airlines, either XIamen AIrlines or Air China, are offering some affordable solution from Europe. Round trip flights are starting at €376. Also the advantage could be that most of EU citizes may entere Macau without visa requirements. 
If interested in solution with Xiamen Airlines you can look for travel dates between September to 15th of December 2016 and in February 2017. Max stay 1 month. Book by end of August. Consider to depart from cities such as Amsterdam, Luxembourg, Brussels. main airports in Italy or Spain, Lisbon and Copenhagen. Deal with Air China is valid for flights from 16th of October and before 15th of December and from January till end of June 2017. The cheapest solution is at this moment available from Vienna, Budapest or main airports in Germany. (Dusseldorf, Frankfurt, Munich).
Booking samples
Xiamen Airlines
Air China
Booking sample of cheap return flights from Europe to Macau from €376 here. In this case you would depart from Amsterdam to Macau on 24th of September 2016. Your return flight back to Europe would be on Sunday, 9th of October 2016.
