Some of you may not know this. I have been using ActiveSky for years and I just stumbled upon it, recently.
When you import the Flight Plan and Process it, the wx and Nav Log opens. Go all the way to the bottom window, which is Titled "NavLog and Waypoint Details". Scroll all the way to the bottom of the window and there it is.
"Average Route Winds for your Cruise Level".
If all of you knew this, I'm sorry. But it was New for Me. Hope it helps someone.

Regards,
Dick

Good point! While I have often used ActiveSky's functions as a rough guide on anticipated conditions enroute, I hadn't fully integrated it with FSBuild to get route-specific data that could enable a closer degree of accuracy in calculating required fuel loads and Cost Indecies. Now I have. Thanks!