1) According to schedule 2) Adhering to schedule 3) Airport board words 4) Airport monitor phrase 5) Airport-board words 6) Arrival-board phrase 7) Arrivals board announcement 8) As per schedule 9) As scheduled 10) Before the deadline 11) By the bell 12) Flight board phrase 13) Flight status 14) Good way to arrive 1) Erstwhile 2) Past 3) Quondam 4) Sometime 1) IE, Monet is not repeated 2) Belonging to some prior time 3) Erstwhile 4) Former 5) Former or previous 6) Like most capital costs 7) Never repeated 8) Once 9) Past 10) Previous 11) Quondam 12) Sometime 13) Without repetition 14) Word for a has-been 
[adj] - according to schedule or without delay 2. [adv] - at the expected time
prompt adjective according to schedule or without delay; `they were always on time`; `a prompt reply`