Final answer:
The question involves a passenger's travel itinerary from Chicago, Illinois, to Anchorage, Alaska, which falls under the subject of Geography, typically studied in Middle School.
Step-by-step explanation:
A passenger's ticket showing a planned itinerary from Chicago, Illinois to Anchorage, Alaska indicates the passenger's travel plans. This information is related to geography because it involves the study of places and the relationships between people and their environments. Geography incorporates understanding the physical landscape of Earth and how humans interact with it, including travel and transportation routes like flights.