It's worth mentioning that the dauntless (and maybe wildcat) had a very short control stick to allow for a pull-out chart table for doing dead-reckoning.
Since 4.10, DT have added the option of showing waypoints on the in-flight map without having to display the "GPS" player-icon cheat (No Mini-Map Path option). If you zoom in, the way-points will show angle and length of the leg. Just maintain a speed and heading and you'll be fine with that.
If you're in an online DF map, there are no way-points given at all, but you can make some basic calculations as the side of each grid represents 10km.