A portable shelter that is convertible between a collapsed transport configuration and an expanded operational configuration. The shelter includes a container having a wing wall that is selectively pivotal between a closed position and an open position, and an inflatable tent having a flexible inflatable support structure and a flexible cover. When the wing wall is in the open position, the inflatable support structure is selectively inflatable from a collapsed configuration to an operational configuration to thereby support the cover in an expanded operational configuration above the wing wall, such that the cover forms a sheltered space. The inflatable support structure is selectively deflatable from the operational configuration to the collapsed configuration, whereupon the first wing wall may be pivoted to the closed position to store the tent within an internal space of the container, such that the shelter is in the transport configuration.