Bombardier announced on December 19th, 2012 that an undisclosed airline based in the Americas had signed a letter of intent to purchase 12 CSeries aircraft. The deal also includes an option for 18 further aircraft.
Bombardier indicated that the airline requested to not have its name revealed at the time of the announcement by Bombardier and the company did not reveal when the LOI might be converted to a firm order.
The agreement announced is in addition to the current order book that Bombardier holds for 138 firm and 352 commitments and options for the CSeries.

Pinnacle Airlines announced on December 17th, 2012 that it had reached a tentative agreement with the Air Line Pilots Association who represent the Pinnacle Airlines pilot group. The agreement focused on cost reductions, pay, retirement, work rules and benefits.
SkyWest firmed its order for 100 Mitsubishi Regional Jets on December 13th, 2012. The airline also placed options for up to 100 additional aircraft.