Are there any direct flights to anywhere in Europe from San Diego?

Dear jakobnebeker-ga,

Not as such. There are flights direct to London and Frankfurt but
these do involve a stop to change planes.
UA900 to Frankfurt. UA918 and AA930 to Heathrow

You can download flight details in pdf format from this link.
International flights are from page 34 onwards.
http://www.san.org/documents/oag/VCRESAN_Mar06.pdf

Or you can search for the airport destination on this page and it will
provide you with the details of the flight.
http://timetables.oag.com/san/


I hope this answers your question. If it does not, or the answer is
unclear, then please ask for clarification of this research before
rating the answer. I shall respond to the clarification request as
soon as I receive it.
Thank you
answerfinder

Search strategy
san diego airport - gave me the airport web site where these links appear.

Thank you very much.  Too bad.