Most importants cities in Europe have direct flights to Malaga airport, in addition Malaga is connected through domestic flights to main cities in Spain.
There are many low cost companies that operate at Malaga airport and most of them have flights from UK to Malaga, Ireland to Malaga and Scotland to Malaga.

You can check this information on Malaga airport arrivals and Malaga airport departures.
You can find complete schedule information of which airlines fly to and from Malaga and from which cities here – Aena Real-time flights.