The A321 is slower in cruise than most wide-bodies – and here you'll see proof as an American Airlines 777 overtakes an Aer ...

Airlines like Tap Air Portugal and Ireland's Aer Lingus switch between A321neo and A330 planes throughout the year, flying the bigger jet during the summer and holiday months, per Cirium.

Speaking during a briefing on 9 January, commercial aircraft chief Christian Scherer referred to the initial delivery to Iberia in late October and the subsequent handovers to Aer Lingus in December.