There are various services that use world-wide Boeing Winds for forecast wind data which can be used to calculate an approximate flight time between two locations. They usually have best case, worst case, and average case for each location, altitude, and date in the future.
I have searched and searched Google to no avail. Where can this wind data be found, and how can it be used in a commercial product?
For those of you who don't know what the Boeing winds are, I found this description of their software product on am informal message board (not related to Boeing):
The Boeing PC Windtemp program provides global average and statistical winds and temperatures aloft over a 30 year period. These data are used primarily for comparative transport airplane performance and economic studies. The data may also be used for transport airplane route planning on an annual, seasonal, or monthly basis.
Note: Actual winds and temperatures at a specific location and time may differ appreciably from those computed by PC Windtemp. Therefore, data from PC Windtemp must not be used for flight planning, aircraft dispatch, airborne flight navigation, or any other type of actual flight operations.
A seasonal and monthly database with global coverage from 1000 millibars (364 feet pressure altitude) to 10 millibars (101,885 feet pressure altitude). Annual data updates to the most recent 30 year period. Airport codes and coordinates may be imported from a text file in a comma separated value (CSV) format Calculates enroute wind and temperature for up to 50 airport pairs at a time. Calculates enroute wind and temperature for simple great circle tracks or tracks with up to 250 waypoints, with or without altitude changes. Calculates average enroute wind and temperature or any reliability (quantile) between 50% and 99%. Months or seasons, reliabilities, altitudes, and speeds may be nested for input efficiency. Formatted and text output reports are available. Program subroutines (DLLs) can be called from other programs written with C++ or Visual Basic in order to incorporate Windtemp functionality in those programs.