I can also say that it was considerably more expensive to fly through YUL
than it was on the direct MSP
route in the end of September. The ticket directly for me was $1320, but because I too wanted to fly once more on the MD
-11 choose to fly MSP
-BER and BER-AMS
which turned out to be $1650. I looked at other airport to fly into and then use Star carrier award to my ultimate destination but no matter where I looked it was just about the same. It was about $150 cheaper to fly to OSL
but in the end BER won out, just because it was closer.
Good luck with your choice.
As of Jul 2016 I've flown 192 flights on 43 airplane types with 41 airlines traveling thru 85 airports in 37 countries. I've visited 50 countries with 1 more unique one this year. My greatest achievement was climbing Mt. Kilimanjaro in Oct 2015.