Not a parent, so I'm not best placed to say.............................................

[City123]

I walked to school and back at the age of 10, started flying alone at the age of 13 (mother lived in Spain) when i went to visit,

10 and 12 seems a reasonable age to be sat alone IMO

I don't think the issue is them flying at that age, its that their mother was on the same flight and refused to sit with them and expected other to look out for them