When Nohadon reaches Urithiru - and before he jumps into musing about journey vs. destination, he's taking a bath and has his hair and beard cut, which have grown (very?) long during the journey.
I only have the audiobook of WoK and was unable to find that passage again; but do we get a hint of just -how much- his hair and beard have grown (shoulder/waist/knee/something)?.
My point: we know, human hair grows ca. 1 cm/ month. If we could get verification of how much his hair has grown, we could approximate, how long his journey took. Applying the estimates of another poster in this thread that a person can travel some 20 miles/day that could give us a closer look at the distance and/or dimensions in general.
Also, first post (*trembles*), non-native English speaker.