Not sure if it's still offered after the merger, but NW offered a program similar to the unaccompanied minor program. My 90 year old grandma uses it flying from PIR-MSP-TPA. During the connection, they park her in either the NW club or somewhere with some seating and give them something to drink. Then when it's time to board, they come and get her and put her on the plane. In case of IRROPS, they provide the hotel and ensure they're OK, just like with kids. My family has been real happy with this program.