[KuiN]

For more context on how big a deal this is, the A220 is quite widely seen as the future of short-haul aviation. Airlines are moving towards a point-to-point model instead of hub & spoke (especially in Europe), using smaller planes with lower capacity, but flying more frequently, together with best in class fuel efficiency (with the price of jet fuel only really going to go in one direction in the next decades) means the 220 is very, very popular. Airbus is expecting to sell 7,000 of them in the next 20 years. That's coming close to the incredibly successful A320 family (including A318, A319, A320 and A321 models) which has sold just over 10,000 planes since 1986.