JetBlue Airways has firmed up an order for 60 Airbus A220-300 aircraft, the larger model of the A220 series, previously known as the Bombardier CSeries.

JetBlue is already a major Airbus operator, with an existing fleet of 193 A320s and A321ceos in service and an additional 85 A321neos on order.

The order was completed during the last week of December. Airbus will produce the A220-300s at a new U.S. assembly facility in Mobile, Alabama. Construction of the plant, to be located adjacent to the existing Airbus A320 assembly facility, is scheduled to begin later this month. Coincidentally, JetBlue was the first U.S. airline to receive an A320 Family aircraft assembled in Mobile, in April 2016.

Separately, Moxy — a U.S. start-up airline — has also confirmed an order for 60 Airbus A220-300s

Moxy is the new airline venture led by David Neeleman, founder of … JetBlue Airways. In addition to JetBlue, Neeleman also founded Azul Brazilian Airlines and is the controlling investor in the revitalisation of TAP Air Portugal.

Plans for Moxy, a low-cost airline, were unveiled at the Farnborough International Air Show in July. The A220s for Moxy will also be produced at the new Mobile facility.

U.S. A220 launch customer Delta Air Lines plans to introduce the aircraft into service in the coming weeks. Initial A220s for Delta will be built at Bombardier's Mirabel facility. The carrier has ordered 75 A220-100s, with options for a further 50.