The new identity for the proposed merger of Continental and United Airlines features a seriffed typeface, Perpetua Bold. Back in the 1970s, when Negus & Negus designed a logo for the newly-merged British Airways, Dick Negus chose Plantin Bold to replace the sanserif BEA and BOAC logos. Dating from the 1990s, Newell & Sorrell’s Mylius still adorns British Airways planes. On the sanserif side, KLM and Lufthansa retain thier 1960s logos: F. H. K. Henrion’s extended grotesque and Otl Aicher’s Helvetica respectively.
PS I notice that Continental Airlines checked out this post at 21.59 today.