Luggage Interline Agreements Hello everyone, Recently took an Alaskan flight from HNL to SEA and then a Delta flight SEA to YVR (completely separate reservations and separate alliances, (AS is OW and DL is ST). I had one check in luggage with me. When I got to the Alaska’s counter at HNL, I asked if the luggage can be checked through and was initially met with skepticism….