Airbus has revealed an order for 10 A350-900s attributed to an undisclosed customer.
The order was signed on 28 April, the airframer's latest backlog data shows.
It takes the total number of A350-900 orders to 612, of which 81 had been delivered by the end of April.
Airbus's data reveals that the order was one of two agreements for long-haul aircraft during the month.
The other was an order for a single A330-200 for Spanish carrier Iberia.
Airbus also logged orders for 14 single-aisle aircraft.
Egyptian carrier Nile Air is taking a pair of A321neos, although this is a conversion of two previous A321s.
Chinese lessor CALC is to take two A320neos and three A320s, while budget airline AirAsia has signed for three A320s.
Four A319s have also been ordered by an unidentified customer. Over the first four months of this year Airbus has secured net orders for 23 aircraft.