When your trying to book long haul flights especially to destinations like South Africa from London I have found a useful way of cutting costs on your flight. A direct flight from London to Cape Town (CPT) for example is roughly £950 return during school holidays economy class. However there is a way around this by catching a eurostar to Paris and flying from CDG airport. On the expedia site if you type in CDG to CPT you will find BA fly you back to London and then direct to Cape Town. The only difference is that your flight price is reduced to £650 per person. Overall a £600 saving per couple if you don't mind travelling to Paris in the first place either by eurostar or plane.