STL Concourse A Guide: Gates, Food, Airlines

Terminal Overview

Concourse A is part of Terminal 1 at St. Louis Lambert International Airport (STL). It primarily serves domestic departures and arrivals and is heavily used by Delta Air Lines (often centered around the A-gates), alongside other Terminal 1 carriers depending on the day’s operations. If you’re flying within the U.S. on a non-Southwest airline, there’s a good chance you’ll pass through Terminal 1—and Concourse A is one of its main workhorses.

Terminal 1 is the airport’s iconic domed terminal and is generally straightforward: check-in and bag drop upstairs, security, then a single concourse spine with gates branching off. The overall experience is efficient rather than flashy—easy to navigate, with enough food, coffee, and basics to cover a typical wait, plus helpful extras like CLEAR lanes at Terminal 1 checkpoints and a large USO facility on the baggage-claim level (near Carousel 6, open 24/7).

Airlines & Destinations

  • Common Concourse A operator: Delta Air Lines (frequently uses gates around A2, A3, A4, A6, A8, A10).
  • Other Terminal 1 airlines (may operate across A/C gates): American, United, Alaska, Air Canada, Spirit, Frontier, Sun Country, Avelo, Southern Airways Express (and some charters).

Destination-wise, Concourse A flights skew toward major U.S. hubs and regional routes—think connections to cities like Atlanta (Delta), plus other hub-and-spoke routes depending on the airline operating that day. Always confirm your gate letter (A vs. C) in the airline app because Terminal 1 spans multiple concourses and assignments can change.

  • SkyTeam: Delta (and often partners).
  • Star Alliance: United and Air Canada typically operate from Terminal 1 (concourse can vary).
  • Oneworld: American Airlines typically operates from Terminal 1 (concourse can vary).

Layout & Navigation

Concourse A is a linear corridor of gates, generally numbered A1 through A20. You’ll clear security in Terminal 1 and then follow signs for “A Gates.” Once you’re in the concourse, it’s mostly a straight shot—ideal if you like a terminal where you can’t really get lost.

  • Security: Terminal 1 has checkpoints serving Concourses A and C; follow overhead signage for the correct checkpoint. CLEAR is available at Terminal 1 checkpoints.
  • Walking times: End-to-end in Concourse A is typically about 5–10 minutes at a normal pace. If you’re connecting between far A-gates and the Terminal 1 central area (restrooms/food clusters), budget 10–15 minutes, especially during peak bank times.
  • Connecting to other terminals: Terminal 1 is not connected airside to Terminal 2. To switch terminals, you’ll need to exit security and use the free 24/7 terminal shuttle or take MetroLink (rail). Plan extra time—20–40 minutes is a safer buffer including deplaning, exiting, transit, and re-clearing security.

Amenities & Services

Concourse A covers the essentials well, and you can also walk within Terminal 1 to expand your options (including toward Concourse C post-security). For military travelers, the standout is the USO on the baggage claim level near Carousel 6 (open 24/7), which is one of the most useful “hidden gems” in the building.

  • Lounges: Terminal 1 hosts an American Airlines Admirals Club (located after Concourse C security). If you’re flying from Concourse A, you may still be able to access it post-security depending on day-of routing and access rules—just allow a little walking time.
  • Food & drink: Expect staples like Starbucks in Terminal 1 and sit-down options such as Chili’s within the terminal complex. If your immediate A-gate area feels limited, a short walk can broaden choices.
  • Shopping: Convenience retail, snacks, and travel essentials are available throughout Terminal 1; selection is practical rather than boutique-heavy.
  • Business needs: Look for seating clusters near gate areas; for a quieter, more “workable” setup, the lounge (if eligible) is your best bet.
  • Family amenities: Terminal 1 offers a Lactation Suite (Terminal 1 amenities list), and family assist restrooms are available. Ask airport staff if you need the closest option to your A-gate.
  • Accessibility: Elevators, escalators, and accessible restrooms are available; the airport also lists service animal relief areas and AEDs in Terminal 1.

Practical Tips

  • For long layovers: Stay post-security in Terminal 1 and roam a bit—Concourse A is easy to walk end-to-end, and moving toward the busier central areas can give you more food and seating choices.
  • Quietest places: The ends of the concourse (near the lowest/highest A-gate numbers) tend to be calmer than the central spine. If your gate is crowded, walk a few gates away and return when boarding begins.
  • Power outlets: Your best odds are near newer seating clusters around gates and along the main corridor. If you don’t see outlets at your gate, check the next seating pod—often they’re grouped rather than evenly distributed.
  • Wi-Fi: STL offers airport Wi-Fi; connect to the official network and follow the on-screen prompts. If you’re on a tight work call, have your phone hotspot ready as a backup.
  • Terminal changes: If your app suddenly shows Terminal 2 (or Concourse E), don’t assume you can walk there airside. You’ll need to exit security and use the shuttle or MetroLink, then re-clear TSA.