AC and LH, always on flights to Europe including connections within Canada and Europe. About 12 years ago was even able to use upgrades to business class on AC from YVR to LHR for wife & son (came through last minute at the gate), I was travelling with them on a separate ticket (RBC Avion redemption) which was upgraded months prior. This was when upgrades were generous compared to now on AC. Always check ticket terms as often they explicitly state the ticket will not earn miles, especially on an all segment operated by LH issued ticket.

In addition to our trip to Turkey, we redeemed for a trip to Australia on Air New Zealand for the fall. The BMO Airmiles World Elite card giving effectively 2 for 1 redemptions on both trips. Unfortunately the fare bucket on Air NZ earns nothing on TK but gets 25% on UA.