Not a mile wide without being extremely thin. You didn't address how wide an airplane contrail would be if it extended to the apparent horizon in the camera's view.
I've seen them spread out truly vast distances. They're just ice crystals and they're pretty tough. Do a google.com search for "contrails". Flip the switch to "images". Go through the collection. Some of them are obviously more than a mile wide.
Most of the photos are taken of contrail formations close to the aircraft producing them though, but when I grew up in Flyover Country I could lay there in the lawn on a hot summer's day and see HUNDREDS of contrails ~ many as high as 35,000 feet. So how wide do you think they might have been?
The trick here is the APPARENT width of the contrail ~ going no further than the distance of the horizon, whether that's 62, 42, 35 or fewer miles. An Apparent width can be computed without reference to WIND.