I contacted United on March 12, 2024 about this with baggage. The itenary was to start on United in USA and turn into Jeju Air for last flight from ICN to final destination United Airlines statement to me was United Airlines would only get the baggage to ICN from there I will have to collect and recheck from ICN to final destination on Jeju Air. There is not an Interline Agreement with United and Jeju Air.