Soda bread is best the same day you bake it, but it stays fresh for up to 3 days at room temperature in an airtight container. It can also be frozen for up to 2 months. Freeze the bread in individual slices or as a whole loaf. I often store it in a freezer bag, or tightly wrapped plastic wrap or aluminum foil. Let the bread thaw at room temperature, then serve. You can also reheat it in a toaster, an oven or with a few seconds in a microwave to get that fresh baked taste!