You can save a map of an area and use it when your iPhone is offline.
Even when you can’t access Wi-Fi or cellular service, you can view information like hours and ratings on place cards, get turn-by-turn directions for driving, walking, cycling, or riding transit, and see your estimated time of arrival.
Note: Offline maps are available in select areas. Features vary by country and region. Automatic Updates is on by default.
Any maps you on your iPhone.
Tap your picture or initials next to the search field, then tap Offline Maps.
Do one of the following:
Manually remove a map: Swipe left on the map, then tap Delete.
Automatically delete unused maps: Turn on Optimize Storage.