Join Date: Jul 2007
Location: Homebase: CAE - Formerly, YUL
Programs: US CP, UA, HH Gold, Marriott Plat, DL, AA, CO, ++
Posts: 2,188
At PHL, I've used "whichever line is shorter". I'm a CDN citizen on a TN visa. I told the agent "I wasn't sure which line to use" (when using the US line), and he said "Yeah it's OK".
JP