Between 2km (dense urban area) and up to 100km, usually probably around 10km. It is basically a replacement for CB radio, and works similarly. The Meshtastic devices are set for a specific (chat-) channel, and only mesh with devices which have the same configuration/channel.

My experience is about 10% of that, km-range in really good conditions. LoRa is low power, long range wifi protocol, with low bandwidth, designed for sensors running on a battery.

10% of 2km? I feel like you had something set up wrong if you were trying to go long range. I did a basic test with a mestastic ttgo T-Beam, with the stock antenna no modifications and was getting 2miles (about 3km) through dense forest. Out in the open it was much longer but I didn't test it fully. Anyway I was super impressed, it might be worth trying again.

> In testing, LoRa works up to a few miles away with a good line of sight.