WestJet today announced December 2017 traffic results with a load factor of 83.6 per cent, an increase of 2.8 percentage points year over year. Revenue passenger miles (RPMs), or traffic, increased 9.8 per cent year over year, and capacity, measured in available seat miles (ASMs), grew 6.0 per cent over the same period. The airline flew a record 2.1 million guests in December, a year-over-year increase of 10.0 per cent or approximately 190,000 additional guests.

"We are very pleased with our significant growth in traffic, as we reported a record December load factor and flew a record number of guests in December," said WestJet President and CEO Gregg Saretsky. "I want to thank our more than 13,000 WestJetters for their efforts in providing our guests with a safe, caring and friendly travel experience through the extremely busy holiday season."

In December, WestJet and Delta Air Lines announced an agreement to form a commercial joint venture which will offer customers access to an extensive transborder route network, world-class airline products, enhanced frequent flyer benefits, shared airport facilities and amenities, and a more seamless travel experience. The joint venture arrangement is subject to execution of definitive arrangements, board approvals and applicable regulatory approvals in Canada and the United States.