Boeing has played down suggestions of a major structural shift in aircraft buying patterns which would see airlines choosing to split their orders between the two big airframers.
Jim McNerney, chairman, president and CEO of Boeing, speaking on the airframer's third quarter earnings call, said it had not seen as big a change in behaviour as it had anticipated.
However, as airlines grow and consolidate, he said, and "route structures become more complex" different solutions and a mix of products may become necessary.
But he pointed to the recent split order from Air France-KLM which ordered both 787s and Airbus A350s as merely a continuation of existing trends.
He added: "Right now we are seeing somewhat less change than I would have thought."