# What is the reason for extremely high speed of electric current?

I know that electric current is the flow of electrons but electrons have a very slow drift speed (about 2mm/s). How is it that electric current reaches its destination at almost the speed of light?

The speed at which the signal in a circuit travels is not the speed of drifting free electrons but rather the speed of electromagnetic waves whose velocity factor is usually $0.5$ to $0.99$(50%-99% $c$).