And if you’re staying in a specific location — such as a city or a town — there’s an even simpler way:
Maps will still give you the option to make adjustments to the range of the area. And that’s it.
In both cases, Maps will show you an estimate of how much space the file will take up on your phone before you download. Generally speaking, the more precise you can be with your location, the smaller the file size. If you turn on “auto-update” in the settings menu, your maps will refresh about once every two weeks to include the latest data.
When offline, keep in mind that you won’t have real-time traffic data until you have connectivity again. Any travel time between destinations before then will be an estimate calculated as if there is no traffic congestion.