I have about 350k of DC Miles, and want to try and use them all in one go for 4 x Business Class returns to SFO. Travel dates are May - July (flexible) and don't want to book hotels etc until I can work out the flights. Has anyone ever managed to get 4 seats with one carrier on the same flight, booked at the same time? I'm happy to travel direct from LHR, via Fra/MUC with LH, or indeed via any point - just wondering if I'm wasting my time, or is it simply a case of booking 2 and hoping that 2 more are released at a later stage?(not ideal)Appreciate any advice from past experience. Thanks.