Is the trade distance calculated as the crow flies, or as nobles move?
You are currently in Cailyn.
You are 347 miles from your realm, Desert of Silhouettes is the closest region.
Your advisor studies the maps, then proposes this route:
Cailyn - Shomrak - Elntorak - Shyussei - Nyuushi - Desert of Silhouettes
Taking this route, it would take you 116 hours, or 18 turns, to cover the total distance of 751 miles, assuming no travel delays.