Sure is; if you're on 2.0, in app.config there is this setting:
/* What to order schedules by. Use s.[column_name] [ASC/DESC],
with the column name being from the schedules table */
Config::Set('SCHEDULES_ORDER_BY', 's.flightnum ASC');
Just add that to the local.config, and change it to s.arricao ASC (ASC is from lowest to highest, A-Z, DESC is the oppposite)