What is the train station code for Chicago?

Chicago’s Train Station Codes: More Than Just “CHI”

While many travelers associate Chicago with the Amtrak station code CHI, the reality of rail travel in the Windy City is a bit more nuanced. Understanding the different codes and zones is crucial for smooth and efficient travel planning, whether you’re arriving on a long-distance train or navigating the local commuter network.

For Amtrak passengers, CHI is indeed the primary station code, representing Chicago Union Station. This historic landmark serves as the hub for Amtrak’s long-distance and regional routes, connecting Chicago to destinations across the country. It’s important to note, however, that CHI is distinct from the city’s IATA airport code, which is ORD for O’Hare International Airport and MDW for Midway International Airport. Interestingly, Union Station also has an IATA identifier, ZUN, primarily used for baggage handling and intermodal connections, though it’s less frequently encountered by the average traveler.

Beyond Amtrak, Chicago boasts an extensive commuter rail system operated by Metra. While Union Station serves as a central hub for many Metra lines, the station itself doesn’t have a specific Metra code. Instead, Metra utilizes a zone-based fare system, and Union Station falls within Zone A, also designated as Zone 1. This is important for commuters calculating fares, as the cost of a Metra ticket depends on the number of zones traveled. Understanding you’re traveling to or from Zone A/1 when using Union Station helps ensure you purchase the correct ticket.

So, while CHI is a useful starting point for understanding Chicago’s rail connections, remember the context. CHI signifies Amtrak, ZUN is its IATA counterpart, and Zone A/1 applies to Metra’s fare structure. Knowing the difference can save you time and confusion when navigating the city’s diverse rail network.