KLM and Air France (with help of Etihad Airways regional Darwin Airlines) gives an interesting solution for those travellers mainly within Germany to visit Florida during the European winter 2014/2015. Roundtrip flights from Leipzig to Miami are available already for €396. Disadvantage is indeed not the perfect routing on the other hand the fare is really attractive for a roundtrip flight to USA.
If interested please do not issue ESTA certification (or US visa) prior your departure. KLM/Air France promotional offer allows to book the flights between November 2014 and March 2015. (except blackout period during Christmas holidays).
On you way to America you would have to accept two layovers in Amsterdam and Atlanta before you reach Miami. On the other hand there is not a long wait time at any of the airports and total transit time is still quite fair for this pretty good fare.
Booking sample of cheap roundtrip flights to Miami from Germany for €396. In this case you would be flying from Leipzig to Florida on 4th of November and returning from America back to Germany on 19th of November 2014.