@evan Years ago I was flying from CNF to GIG with a conference mate and CNF is a horrible airport in the middle of nowhere. My mate was the type of person who likes to arrive at the last minute and swore everything would be fine. It wasn’t, we missed the flight and had to wait for the next one, for like 5h - it would be impractical to go back to the city, etc.
This is to say: now I always make a point of arriving 3h early no matter what.