Is it feasible to go to Disneyland Paris as an excursion from a stop in Le Havre?

Unfortunately, the distance between the port of Le Havre and Disneyland Paris, which is to the east of Paris itself, means that while you could reach the park and return in time for your cruise ship setting sail, you’d have very little time to spend there. Realistically it isn’t worth it and therefore isn’t a feasible shore excursion.