According to a joint application before the US Department of Transportation (dated November 24th), WestJet and Emirates have entered into a codesharing agreement.
Westjet and Encore intend to inaugurate codeshare service as soon as possible following receipt of all required government approvals.
The agreement follows an interline co-operation pact the airlines signed in 2011, focused on services at Pearson International Airport.
Based in the Dubai, Emirates services over 140 countries in six continents.
h/t Airline Info [PDF]