How Long Does it Take to Get to Valinor?

[Inziladun]

Originally Posted by Puddleglum

While nothing here is certain, my Theory is that the route to Valinor remained essentially unchanged and only the World was Bent under it.

In that case, those who were permitted to find the Straight Road, would still have a (roughly) 12-14 week crossing to Eressea and the haven of Avallone.

I would think that distance and time from the time of embarkation from Middle-earth to the West could only be measured to the point at which the "new" way diverged from the "old".

The section from the Akallabêth quoted by Puddleglum continues:

....a Straight Road must still be, for those that were permitted to find it. And they taught that, while the new world fell away, the old road and the path of the memory of the West still went on, as it were a mighty bridge invisible that passed through the air of breath and flight (which were bent now as the world was bent), and traversed Ilmen which flesh unaided cannot endure, until it came to Tol Eressëa, the Lonely Isle, and maybe even beyond....

Ilmen is defined in the Silmarillion as "the region above the air where the stars are".

The bit about "traversing Ilmen" leads me to believe the traveler to the West would cease to be "sailing" in a conventional manner when they encountered the entrance to the Straight Road (if allowed, or course). The ship was only a means to get to the point at Sea where the gate lay. After that, how could time and distance be measured by a Middle-earth denizen, if one started to fly or passed through to another plane of existence?