Correct, FRA to YYC on AC. I'm looking to fly SK on the leg from CPH or ARN to FRA, rather than having to fly, say, CPH -> MUC -> FRA on LH, which is all that really shows up now. CPH -> LHR -> YYC would also work, although I prefer to avoid LHR when connecting.

I'm not particularly sensitive to fuel surcharges or anything like that, just trying to minimise the hassle of travel.

I'm sure I could figure this out through trial and error by just checking a variety of dates until I found out how far ahead I could book on SK, but that could be pretty labour-intensive and I thought one of the good folks here might know.