The calculated distance (air line) between Puyo and Santo Domingo de los Colorados is approximately 117 miles respectively 189 kilometers.
By car or train, the actual journey to Santo Domingo de los Colorados is certainly longer, as only the direct route (as the crow flies) between Puyo and Santo Domingo de los Colorados has been calculated here.
Air line (approximately)
189 kilometers
102 nautical miles