Finnair, member of Oneworld aliance, is currently running promotional offer to China when departing from Germany or UK. The cheapest solution are return tickets from Germany (Frankfurt, Munich, Hamburg or Berlin) to Chongqing already for €418 or to Xi´an from €469. For still fair price you may also consider to depart from UK (London or Manchester) where the cheapest tickets to China are starting at reasonable £395.
If interested in this promotion please look for flights within April, May and June. Latest date of your outbound flight has to be 30th of June 2015. What also makes this deal attractive is that you may fly during weekend days for same rate as when departing during week so you may spend maximum days in China during your holidays which is not common..Accommodation in China is starting already at €7/£5 for double room and night. If you want to compare hotel rooms through leading booking sites you may use our tool here.
The easiest way to check your connection possibilities is through Skyscanner. This tool gives you quickly a rough idea which low-cost airlines are connecting your home town.
Booking sample of cheap return flights from Europe to China for €418. In this case you would be departing from Hamburg to Chongqing on 25th of April. Your return flight from China back to Germany would be then on 9th of May 2015.