My next leg on my ex-IST DONE4 is ORD-YVR on 3rd Sep, returning on 5th, but AA have curtailed the route early, so they've rebooked me ORD-DFW-YVR both ways. This is not particularly convenient + means most of the holiday weekend spent in the air, rather than in Vancouver. I figured instead that I'd go somewhere else (SAN springs to mind) but I'm wondering what my best option to avoid the $75 change fee is? Start at RTW desk? Exec Plat desk? Anyone got experience with negotiating this sort of thing?

Thanks for any advice,
Chris