I need to fly R/T from LAX to Toronto on set dates in early February. Traditionally I'd fly economy(plus), but due to a painful back injury I physically can't do the trip without a lie-flat seat. I have a pretty hearty number of miles with United and points with Chase Ultimate Rewards, which I'm happy to use -- but want to maximize value. I suspect Air Canada is my only option on a nonstop if I'm going to use points (either via United as a codeshare or via the Chase portal), and they do have business with lie-flat. Any advice on how to do this and optimize the combination of points/dollars? (Also, I'm re-starting travel after some time off and am a little rusty at this, if I missed any threads when I searched the forum please point me the right way!)