Abstract: A self-venting, self-stopping pouring spout for use when pouring liquid from a supply container into a target container is provided. The pouring spout attaches to the supply container. The pouring spout further has a self-venting conduit through which liquid and air pass between the target container and the supply container. The self-venting conduit has a tubular configuration and includes a spout body which has a flange that seals against the supply container opening. The self-venting conduit further has a travelling tube which lies within the spout body and seals with the flange of the spout body providing a valve for regulating the transfer of fluid and air between the supply container and the target container. The valve is normally biased in a closed position and movable from the closed position to the open position to provide for fluid and air transfer.