There will be a @flyethiopian flight from BA to Addis Ababa on 11 April at 21:55. Should any NZers wish to take this flight please ensure you can meet the transit requirements and work with your travel provider to book onwards travel to NZ.
Tickets https://ethiopianairlines.com/aa 

If you are outside the Buenos Aires metropolitan area, please follow the advise on this thread to be able to reach the airport: https://twitter.com/NZinBuenosAires/status/1242096769787404291