Hello. Exactly 55K LM from SJO to LHR (for this July even though it is High Season) And last X'mas did 55K from SJO to FCO in C Class. Be aware that no connection should take more than 24hrs. as System will yield error. The only thing is that the fortune of patience is required when dealing with new LM agents. Another option that has worked is going to the Tckt Office (CTO) of TACA (not Avianca!!!) and they can do it if they please.