I Flew my Spark out to 1 mile, I put a strobe light on it, so that I could see it, I have only taken the Mavic to .6 Miles
I didn't say I could see it that far! Hell, I have trouble finding it when it returns and hovers 200' above my head! I use the camera view.
I know, I know...I'm not supposed to do blah blah blah, but it gets super boring to fly only within LOS.