Originally Posted by
flyingmonkie
As far as I understand it through checking is very different to being protected from delays because of a connection. Through checking might well happen because the check in agent is unlikely (although not definitely) to look very closely at the actual tickets. This would be different if you suffered IRROPS or similar when a more rigorous inspection would likely take place.
Good point. I think my main concern is the through-checking. I'll roll with the punches if the SFO/LHR is late. But would welcome an opinion on the through-checking on same PNR.