Originally Posted by craigthemif

First of all, Aeroplan has many extra fees that can make their rewards really poor value. And you are only ever going to find reward space on the same dates that United offers saver space at 60/70k each way.

But more importantly, you should spend some more time researching the general idea of credit card partnerships and frequent flyer programmes. The fact that United and Air Canada are both Star Alliance members doesn't mean at all that Chase is obliged to partner with Air Canada / Aeroplan. Chase has specific partners, and you need to work with those programmes.

Moreover, once you earn miles with United, say, you can't then transfer those miles to Air Canada or Lufthansa or any other Star Alliance partner. It just doesn't work that way.