Yes.
From CNET - http://www.cnet.com/products/bose-quietcomfort-35/
"The good news is the headphone does work as a wired headphone if the battery runs out of juice (a 47.2-inch cord is included -- it's slimmer than the one that comes with the QC25 and has no integrated microphone). You just can't use the noise-canceling or Bluetooth, of course, but at least you can get some sound out of it"