Originally Posted by
pentiumvi
I've been curious about this as well, so I ran some searches on ITA for your flights and got ~$538 CAD in taxes and fees. (DFW-YVR leg was $220 in YQ! ouch)
Considering your trans-ocean flights are on YQ-free carriers, I don't think the origin-destination fee model applies.
Thank you pentiumvi for doing that. In that case, I don't believe I was overcharged. It was simply my impulse that cost me. Normally I would go and make a change, but this itinerary is complex, I don't want to risk losing my other flights. Live and learn.