Those airlines are now girding for a year of slower-than-expected growth while waiting for regulators in the USA and Latin America to green-light the jet's return to service.
"We will [report] much lower air traffic growth in 2019," Pedro Heilbron, chief executive of Copa Airlines and president of Latin American airline trade group ALTA, said on 27 October. He spoke during a press conference marking the opening of ALTA's annual forum.
"We all have grounded aircraft right now, and are all obviously affected," Heilbron says.
Copa has not said how severely the grounding might impact its financial results, though other 737 Max operators have. Those include much-larger American Airlines, which recently disclosed it expects the grounding will take a $540 million bite from its 2019 financial results.