Join Date: Dec 2005
Location: NYC
Programs: SPG, AA, BA, CO, UA, US, B6, DL, Amex MR, HH
Posts: 1,009
An easy way to get an estimate is to put the itinerary into ITA, and see what the taxes/YQ is there (making sure to remove the fares and YQ for airlines that don't charge). It's a rough estimate, but comes out pretty close to what they actually charge you. Your itinerary is fairly YQ-friendly as the only airline that you're flying that aeroplan charges YQ for is TG (and a short LH leg). UA, LX, TK all don't have YQ (for now).
Based on ITA, your first itinerary would be ~$680, and your second would be ~$520.