Dublin is about 17 times smaller than Santiago.

Santiago (area of the 32 comunas of Santiago Province) is approximately 2,030 sq km, while Dublin is approximately 118 sq km, making Dublin 5.8% the size of Santiago.
Tip: This to-scale comparison of Santiago vs. Dublin uses the Mercator projection, which distorts the size of regions near the poles.
Our free app, MapSize by MyLifeElsewhere — compare any two places, to scale on your mobile device.