Paris is connected with Germany and London by many airlines offering cheap solution to move within the airports. For instance one-way ticket between Frankfurt and Paris are available for €45. This is based on service of Air France. (look up fare through Skyscanner).
If interested in this deal please look for flights in travel period till 24th of June 2015. (there is blackout period between 18th and 30th of December 2014). Booking has to be done till 20th of October 2014.
Booking samples
Paris - Bangkok - Germany for €399
Paris - Bangkok - stopover Oman (Muscat) - Germany for €450
Paris - Bangkok - London for Ł335
Paris - Bangkok - stopover Oman (Muscat) - London for Ł343
Thanks to extremly high competition in Thailand you may find all the kind of service for really cheap price. On the other hand Bangkok as well as whole Thailand offers also super luxurious 5* hotel chains. It is just up to you once you arrive there which service you choose but the fact is that Thailand still remains one of the most rewarding destinations for casual tourism. This is indeed one of the last possibilities to book cheap flights to Thailand during actual main tourist season for such a reasonable price!
Booking sample of cheap open-jaw flights to Bangkok from Europe for just €399 here. In this case you would be departing from Paris to Thailand on 9th of February. Your return flight from Bangkok to Frankfurt would take place on 24th of February 2015.