Some maps do show Alaska (and Hawaii) isolated and detached usually at the bottom but that is only for visual purposes to have all 50 states shown in one.
Otherwise, you can clearly see on a world map that Alaska is connected with the rest of North America by land and borders Yukon and British Columbia in Canada.
Otherwise, you can clearly see on a world map that Alaska is connected with the rest of North America by land and borders Yukon and British Columbia in Canada.