The cheapest round trip option we've found recently is to Dusseldorf for £162.
All Cities
Dusseldorf
15 Jul (Tue) - 17 Jul (Thu)15 Jul (Tue) + nights
07:50
LHR
1h 20m
Direct
09:10
CGN
16:35
CGN
1h 30m
Direct
18:05
LHR
£162
Found 9 days ago
Direct flights to Germany
We could not found any direct flights to Germany from London. Perhaps try selecting a different origin or search for direct flights to the whole country (Germany).