As with Pan Am, several African flag carriers utilized Robertsfield as a waystation on transatlantic routes. As early as 1966, Nigeria Airways began a codeshare cooperation on Pan Am's flights to New York-JFK from Lagos via Monrovia, and in later decades Monrovia remained a stop on its weekly services to New York, at most times utilizing its own McDonnell Douglas DC-10. This also included for a time a weekly Monrovia-Port of Spain-Miami flight. Until 1983, Air Afrique's DC-10s also stopped at Robertsfield on that airline's Abidjan-Monrovia-Dakar-New York services. Likewise, Zambia Airways made two stops per week at RIA on the way to New York-JFK from Lusaka, a service which commenced in April 1988 with a DC-10 and lasted until 1992.