This might not be the best response:
First link shows all airlines that service aruba, but not the schedules, which you mentioned change frequently
http://www.airportaruba.com/en/flightinfo/airlines/
Next links will show live departure and arrival information
http://www.airportaruba.com/en/flightinfo/arrivals/
http://www.airportaruba.com/en/flightinfo/departures/