After loading/scanning of MSFS 2024 scenery (while MSFS 2024 is running took about 10 minutes), when I select View | Airports | Show only Add-on airports … none of my add-on airports show in the map?  I had made an assumption the scan of my MSFS 2024 scenery and loading would have identified “add-on” airports, but this doesn’t seem to be the case.

I can go thru every add-on airport manually and locate them on the map and set them as an Add-on airport (yellow circle), but was hoping to avoid this as I have a considerable collection of airports for MSFS 2024.  I also noticed that when I do set an airport as an “add-on”, then proceed to select View | Airports | Show only add-on … all I get is the yellow circle and NO ICAO identifier? 

Version 3.0.17

atools version 4.0.17

OpenSSL 1.1.1g 21 Apr 2020

OpenSSL 1.1.1w 11 Sep 2023

Any assistance is most welcome.

Rob.

Here is the solution to your problem

ALTOLNM - Mark Little NavMap airports as addons from the database of MSFS Addons Linker för Microsoft Flight Simulator | MSFS

https://albar965.github.io/littlenavmap-faq.html#problems-scenery-msfs24

Maybe Asobo fixes this one day.🤷‍♂️

Alex

Thanks for the responses and possible solutions.  I think I’ll just manually track the airports I have (I don’t stream any, always download and install).  

I don’t hold much hope Asobo will address this and other issues as they’ve been pretty adamant about only supporting Airports and Aircraft development.

LNM is awesome, so many thanks for the years of dedication. 

I did some poking around and it looks like I can probably use the Packages folder

Community seems to hold all my 3rd party airports in the folder title "-ICAO".

And the Official2024 seems to have same:

Found an updated source for ICAO list here.  Pull ICAO from folder name, match up with ICAO list and write to CSV for LNM import.  Load entire ICAO list to ReadOnlyDictionary so lookup should fast, just take a bit more RAM.

So if I'm reading your specs correctly the CSV would be ((example EGGP):

Addon,Liverpool John Lennon Airport,EGGP,53.333599,-2.84972,80,na,na,Liverpool,GB,250,2025-11-16T15:29:00.000,\\Amd9950x3d-game\c\Users\robai\AppData\Roaming\Microsoft Flight Simulator 2024\Packages\Community\digitaldesign-eggp 

Not the best approach (kinda brute force), but looks like this will get me to about 97% of installed.

Rob.

Edited November 16, 2025Nov 16 by SayAgain

10 hours ago, SayAgain said:

I did some poking around and it looks like I can probably use the Packages folder

This does work for the Microsoft airports but other add-ons have arbitrary folder names.

Maybe I can do something reading the community folder and just extracting the airport ICAO codes. Have to think about this, but this would be just another workaround around Asobo's lacking interfaces.

Alex

If I can make some time I’ll whip up a desktop app (WPF .NET 10) to search community and the official folders and generate a CSV for LNM import … it seems MS/Asobo use similar folder naming convention for ICAO i.e. “-EGGP” … will provide to all to try out (I’ll put the code on my GitHub account if you or anyone wants it).  But, not likely until this weekend or maybe over Thanksgiving when I actually get a day away from work.

Yeah, not get everything but getting a good majority, but sometimes the .json files will provide ICAO also.  Since many of my folders are symbolic links I will have to extract the actual path and translate to share/computer name path (currently working on another PC with network via share … not an issue for local where MSFS is installed).

I did modify local permissions for symbolic links using FSUTIL BEHAVIOR SET SYMLINKEVALUATION L2L:1 R2R:1 L2R:1 R2L:1 but not sure this was necessary as I only need to read the link.

On 11/17/2025 at 4:54 AM, albar965 said:

This does work for the Microsoft airports but other add-ons have arbitrary folder names.

Maybe I can do something reading the community folder and just extracting the airport ICAO codes. Have to think about this, but this would be just another workaround around Asobo's lacking interfaces.

Alex

so are you saying this could work for Asobo's custom airports? This is what I'm hoping to get, as I only have a handful of msfs2024-native airports downloaded so I can just manually mark then in LNM. But MSFS2024 comes with a ton of their own custom airports that I have no idea about in LNM.