Baggage rules / check through to final dest.
is the 14h overnight? Not all airports can handle bags overnight.
airlines are capable of checking bags through onto flights that are on separate tickets. many airlines do not do it as a matter of policy. I do but know what LAN's policy is.
the receiving airline can sometimes ask for extra payment. I wouldn't expect it to happen on US for a regular bag but I have no idea what will happen worth a surf board.