

No, it’s not. It’s noth of the equator, so the straight line route would look like a curve towards the north. This route is curved south, which means it’s actually because of air traffic control routing them along approved flight paths. That might be for traffic management reasons, or because of terrain on the route, or restricted airspace.
That’s misleading. The shortest route would be the “great circular” joining the two points, which lines of latitude definitely are not.
The only line of latitude which is a great circle is the equator.