Originally Posted by
LondonElite
Flying through London will incur significant additional fees for part of the journey, though there are many cheap budget airline offers from London to Greece.
Not to mention that hotels in London tend to be quite expensive, especially when compared to Greece.
If the OP wants to see London, then go for it. If she's doing it just to save money, that's unlikely to work, just go straight to Greece. If she's looking to build in an inexpensive stop to see another part of Europe, I'd suggest a more affordable hub city like FRA or MUC.