AC: No carseats in lie-flat business class, carseats are allowed in non-lie flat business class.
CX: Front facing carseats allowed in First. Rear facing car seats not allowed in business or First. Front facing carseats not allowed in business.
DL: No carseats in business on A330, 777, 767 or 747 aircraft.
UA: No carseats in Global (3 cabin) First class. Allowed in business class and domestic first, though a seatbelt extended is needed when airbag seatbelts are present.
LH F-no go.
TK J-no issues.
LX F-no issues.
OS J-no issues.
RJ J-no issues.
UA J-no issues.
All DP's were with rear facing car seat.