[UPDATE, Nov. 21, 2017: A Delta Air Lines official confirmed that its seat availability is is "identical across carriers, to the last available seat" with JV allies Aeromexico, Air France, Alitalia and KLM, and with partners China Eastern, Gol and Jet Airways. Meanwhile, American Airlines' "seamless codeshare availability" with Iberia and British Airways covers all points of sale except within the Galileo GDS at U.S. points of sale and the Worldspan GDS at U.K. points of sale, according to a spokesperson. The spokesperson added that AA's work on seamless codeshare availability with Finnair is . . .