ORD Terminal 1 Guide: Gates, Food, Lounges & Tips

Terminal Overview

Chicago O’Hare’s Terminal 1 is primarily United Airlines’ main hub terminal and a major home for Star Alliance partners. You’ll use it for a huge share of United domestic departures plus many international flights operated by United and select partner airlines. Terminal 1 covers Concourse B (gates B1–B24) and Concourse C (gates C1–C31), for 52 gates total—so it’s big, busy, and designed for frequent connections.

Expect a “hub terminal” feel: lots of connecting passengers, plenty of fast food, and constant gate activity. A standout feature is the underground walkway between Concourses B and C—a signature O’Hare experience that makes switching concourses straightforward even when the terminal is crowded. Overall, it’s efficient once you know where you’re going, but allow extra time at peak morning and late-afternoon departure banks.

Airlines & Destinations

  • Main operator: United Airlines (hub) and United-operated flights across the U.S. and many international routes.
  • Partner/international airlines commonly operating here: Lufthansa, All Nippon Airways (ANA), and other Star-focused services listed for Terminal 1 such as Aer Lingus and Air Canada (airport allocations can vary by flight/season).
  • Alliance focus: Strongly Star Alliance due to United, Lufthansa, ANA, and other partners.

Key destinations from Terminal 1 typically include major U.S. business and leisure cities (New York, Washington, Los Angeles, San Francisco, Denver, Houston, and more) plus long-haul international markets via United and Star partners (for example, key European and Asian routes). Always confirm your departure terminal and gate in the United app or ORD flight info screens, especially for international flights that may involve different processing or terminal assignments.

Layout & Navigation

Terminal 1 is split into two concourses: Concourse B (B1–B24) and Concourse C (C1–C31). Both concourses are connected airside, so if you’re already past security, you can move between them without re-screening. Gate areas are linear and easy to follow—just expect longer walks to the higher-numbered gates during rush periods.

  • Security: You’ll clear security in Terminal 1 before heading out to B or C gates. If you’re connecting from Terminal 2 or 3 post-security, you can stay airside via the pedestrian tunnel connections.
  • Walking times (post-security): Terminal 1 to Terminal 2 is about 10–12 minutes. Terminal 1 to Terminal 3 is typically 15–20 minutes on foot through the underground tunnels.
  • To Terminal 5: Use the free Airport Transit System (ATS) from the lower level for a quick ride (trains every 3–5 minutes, 24/7; typical terminal-to-terminal trip 5–10 minutes). A Terminal Transfer Bus (TTB) may operate during daytime hours for airside transfers; at night you may need to exit and re-clear security using ATS.

If you’re tight on time, aim to confirm your concourse (B vs C) as soon as you clear security—switching concourses is doable, but it can eat up minutes fast when the terminal is busy.

Amenities & Services

  • Lounges: As United’s flagship ORD terminal, Terminal 1 is where you’ll generally find United’s lounge options (availability and locations can change—check the United app for same-day lounge access details and directions).
  • Food highlights: Easy, familiar options like McDonald’s, Dunkin’, and Auntie Anne’s are convenient when you’re sprinting between gates. If you want something more satisfying, look for Tortas Frontera (popular Mexican-inspired sandwiches/plates) when you have time to order.
  • Shopping: Expect the usual airport mix—snacks, travel essentials, and last-minute items—most concentrated along main concourse corridors.
  • Business needs: Seating clusters are common near gate areas; for quieter work time, consider lounge access or less congested gate ends.
  • Accessibility: ORD terminals are designed with elevators/escalators, accessible restrooms, and step-free routes. If you need assistance, request wheelchair support through your airline in advance—especially helpful for long walks to far gates.

Practical Tips

  • Best for long layovers: Pick a base near your departure concourse (B or C) and then branch out for food. If you’re unsure of your final gate, staying closer to the central concourse areas makes it easier to pivot.
  • Quietest spots: In general, the ends of concourses (farther from main junctions) tend to be calmer—great for reading or catching your breath between flights.
  • Charging/power: Known charging station locations include B5, B11, B12, B14, B19 and C5, C15, C21, C28. If you’re running low, head to one of those gate areas before you settle in.
  • Wi-Fi: ORD offers airport Wi-Fi; connect and follow the on-screen prompts. If the network feels slow, try toggling Wi-Fi off/on or moving closer to a gate seating cluster where access points are denser.
  • Connections strategy: If you’re connecting to Terminal 2 or 3, the post-security tunnels are usually simplest. For Terminal 5, plan on ATS and extra time—international processing and re-screening rules can change the pace.