Arrivals and departures can be checked
:Arrival - Departure Times
There are flights to and from Las Palmas throuhout the week. Many UK flights arrive Mondays throughout most of the day. Saturday evening and late night Sunday morning are the next two busiest followed by Thursday afternoons.
Arrival - Departures Times are here
One the new page is loaded enter the Airport Code for Las Palmas Airport which is LPA
You can also check departure arrival times for all major civil passenger airports across Europe ; if you do not know the Airport code for a particular airport click the Airport codes link to find the code you need.
Airport Codes are here
Telephone Las Palmas Airport 928 579 095
All departure and arrival times are supplied by flightstats.com
The following link from flightradar.com gives you a
visual look at flight activity, limited use but might just be what you are looking for.