La Compagnie, a French boutique, all-business-class airline, tops the list when it comes to the world’s longest non-stop Airbus A321LR flights. Inevitably, the fact that the airline has significantly fewer seats on its planes as compared to typical two-class layouts allows it to operate longer routes with no payload restrictions. Of the three transatlantic routes it operates, all of them stand right at the top of the list of the longest non-stop A321 flights.