CREATE TABLE table_204_215 (id DECIMAL, "airline" TEXT, "destination ( s ) " TEXT, "aircraft scheduled" TEXT, "service date ( s ) " TEXT, "comments" TEXT)

which airline has the most listed destinations ?
SELECT "airline" FROM table_204_215 ORDER BY "destination(s)" DESC LIMIT 1
SELECT "airline" FROM "table_204_215" ORDER BY "destination(s)" DESC NULLS LAST LIMIT 1