A really enjoyable solve, and not too difficult compared with the last couple of weeks' puzzles. Matters were helped by the fact that I solved most of the SE corner first, giving me the 43 ac. and checking letters of the 47.
The 'journey' was much trickier to spot in the completed grid than the 'destination'. I struggled for a while to get the 'journey' to extend as far as the reason for its change of destination, before realising that a shorter 'journey' through the grid was needed.