Chicago - United Airlines will put its Boeing 787-10 Dreamliners into service next year on January, on routes between Newark and the airports of Los Angeles and San Francisco.

The airline, which already operates the -8 and -9 variants, will become the second after Singapore Airlines in the world to operate the largest member of the Dreamliner family.

Boeing delivers the first 787-10 to the launch company Singapore Airlines

The U.S. carrier has opted for a configuration to accommodate 44 passengers in Business class, 21 in the Premium, 25 Economy Plus with extra legroom and 228 in Economy - 318 seats versus 252 in the 787-9 and 219 in the 787-8.

United will receive its first 787-10 Dreamliner later this year (mid-October).

Last month, the aircraft registered N14001 flew from the Charleston factory to Everett along with other Dreamliners waiting to be delivered to escape from Hurricane Florence. On September 20 it flew back to Charleston to be prepared for delivery.

United plans to take delivery of two more 787-10 before the year-end.

The Star Alliance company currently operates 12 787-8 out of 12 ordered and 25 787-9 out of 29 ordered. The operator also expects the deliveries of its 45 Airbus A350-900 from 2022.

The Boeing 787-10 has so far accumulated 171 firm orders, including 49 for Singapore Airlines (six in service), 30 for Etihad Airways, 25 for the leasing company ALC, 18 for EVA Air, 14 for United Airlines, 12 for British Airways and ten for Air France-KLM among others.