Does anyone know a good API for schedules? Most focus on fares which are much more complicated (routing, agreements, availability). I'd like to just get the inf

Does anyone know a good API for schedules? Most focus on fares which are much more complicated (routing, agreements, availability). I'd like to just get the information of which flights are scheduled. The information is readily available from airports and airlines but so far I haven't found an (appropriately priced) API.