This might be old news to most but I've been using this quite a while and saw some streams of people getting confused over where they ended up when they used their Whistle.

Using the waypoint addon TomTom you can ctrl+right click a flight point on the main map to set up a way point.
Do that to the few FPs that you are close to and then use /cway in chat. The waypoint arrow will point at the closest waypoint to you so you can make your adjustments if needed to get directly where you want.

It can save a little time here and there.

Right click the waypoint arrow to get Remove all Waypoints afterwards to clear the arrow completely.