Originally Posted by star_world
Well taking my EWR-PEK flight as an example there were strong head / tail winds at various points in the flight (>80mph for long periods of time). Not sure if this is typical or not but they did exist...
Yes, there are headwinds and tailwinds, but it's quite consistent year-round, and they are no where as strong as going across the Northern Atlantic or Northern Pacific, especially in winter.