On Oct. 1, Latam Airlines Group and Finnair will begin codesharing on flights, connecting Latam's hubs in Sao Paulo and Santiago, Chile, to Helsinki. Latam will add its code on Finnair flights between Helsinki and London Heathrow, Paris Charles de Gaulle Airport, Madrid, Barcelona and Milan. Finnair, in turn, will add its code on Latam's transatlantic flights between the two South American hubs and the same five airports.