Sat navigation offline when abroad Google maps

[Guest rferrett]

Hi,

I'm off to Portugal on the weekend (lucky me!) and I need to navigate about 150 klicks from the airport.

I don't really want to spend hundreds of pounds on mobile roaming data so wondered if there was a way to download the entire route in Google Maps or Navigation before I leave?

If not anyone know of a free, or at least very cheap, alternative that will allow me to do this?

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