Flight plan created in MSFS world map

[richavery]

For MSFS 2020: Create your flight in Simbrief, generate and download using GTN format which saves as .gfp. You should then setup your flight using your departure location. Hit Fly.  Make sure you have saved in the correct tds folder. Import the flight plan in the TDS GTN. It should be working.

You can also create and export in LittleNavMap, too.

Thank you - I was looking for a way to do that! (I can't figure out how to export the plan in LNM but can use the simBrief method.)
 
FWIW, if anyone wants to make use of user-defined waypoints in simBrief, you can enter coordinates in the N/S E/W format (I don't know the technical term for this!). If a waypoint is at 51° 25' 35.81" N 0° 58' 29.10" W, type 512536N005829W into the route text box. (Notice that each section consists of 6 digits - 2 for degrees, 2 for minutes and 2 for seconds - so 0° becomes 00 and the decimals are rounded.) The resulting .gfp file downloaded from simBrief will contain the waypoints.

As an example:
EGLK
wpt 1: 51° 25' 35.81" N 0° 58' 29.10" W
wpt 2: 51° 27' 8.27" N 1° 18' 50.23" W
wpt 3: 51° 36' 12.67" N 1° 26' 25.06" W
wpt 4: 51° 43' 55.68" N 1° 15' 2.81" W
EGTK

Enter EGLK as the departure and EGTK as the destination. In the route box, type:
512536N005829W 512708N011850W 513613N012625W 514356N011503W
and click the Analyze Route button.