If my experience is any guide - I had a longer connection from United to IslandAir HNL-OGG with separate tix and no inter-line. An hour would have been plenty but UA failed to get my luggage onto the connection at LAX. When I arrived in HNL, UA paged me to the baggage office. They told me that my luggage would be there the next day. I asked that they send it on to my location in Maui and UA said that their responsibility ended with getting it to HNL, no matter where I was going. They offered to send it to IslandAir's counter in HNL when it arrived. IslandAir said they'd take it to OGG if UA brought it to them but it was UA's fault and that they could not do a delivery on Maui. So I got up the next morning and drove to the airport. The IslandAir baggage office was closed but they had piled it by the exit of the commuter terminal. When I complained to United they gave me a voucher for $25, which I burned.