ORD Gate Map: Concourses B to M, Terminals 1, 2, 3 and 5

O'Hare has nine concourses, B to M, spread over Terminals 1, 2, 3 and 5. The letter of your gate is its concourse. Concourses B to L are linked past security, but Concourse M, in the international Terminal 5, is not: you reach it by the free ATS train or the Terminal Transfer Bus.

ORD gate map

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International Airport Transit System (ATS)

Shapes and gate positions: © OpenStreetMap contributors (ODbL). Only the gates in the official directory are shown (checked Oct. 10, 2026). Map data license

Printable ORD gate map

ORD gate map: Concourse B, Concourse C, Concourse E, Concourse F, Concourse G, Concourse H, Concourse K, Concourse L, Concourse M and their 213 gates — Download the map (PNG) · Map data © OpenStreetMap contributors

Gates at ORD

Concourse	Gates	Good to know
Concourse B	B1–B24 22 gates B1, B2, B3, B4, B5, B6, B7, B8, B9, B10, B11, B12, B14, B16, B17, B18, B19, B20, B21, B22, B23, B24	Terminal 1, United. A United Club at Gate B6, Garrett Popcorn near Gate B8 and a Travelers Aid desk at Gate B6.
Concourse C	C1–C31 32 gates C1, C2, C3, C4, C5, C6, C7, C8, C9, C10, C10A, C11, C12, C15, C16, C16A, C17, C18, C18A, C19, C20, C21, C22, C23, C24, C25, C26, C27, C28, C29, C30, C31	Terminal 1, United. The United Polaris Lounge at Gate C18, Billy Goat Tavern near Gate C19 and the Terminal Transfer Bus stop at Gate C18B.
Concourse E	E1–E17 17 gates E1, E2, E3, E4, E5, E6, E7, E8, E9, E10, E11, E12, E13, E14, E15, E16, E17	Terminal 2. Stanley's Blackhawks Kitchen & Tap near Gate E5 and Wicker Park Sushi Bar near Gate E1.
Concourse F	F1–F28 25 gates F1, F3, F4, F5, F6, F7, F9, F10, F11, F12, F14, F15, F16, F17, F18, F19, F20, F21, F22, F23, F24, F25, F26, F27, F28	Terminal 2. The Family Lounge near Gate F1, just past security, a Travelers Aid desk at Gate F4 and Skybridge Bar & Grill near Gate F15.
Concourse G	G1A–G21 20 gates G1A, G1B, G2, G3, G4, G5, G6, G7, G8, G10, G11, G12, G13, G14, G15, G17, G19, G19A, G20, G21	Terminal 3, American. An Admirals Club at Gate G8, Chicago Cubs Bar & Grill near Gate G1 and the Terminal Transfer Bus stop at Gate G17.
Concourse H	H1A–H18 19 gates H1A, H1B, H2, H3A, H3B, H4, H5, H6, H8, H9, H10, H11A, H11B, H12, H14, H15, H16, H17, H18	Terminal 3, American. The Flagship Lounge, listed at Gate H6/K6, and Bubbles Wine Bar near Gate H4.
Concourse K	K1–K20 16 gates K1, K2, K3, K4, K5, K6, K8, K9, K10, K12, K13, K15, K16, K18, K19, K20	Terminal 3, American. Publican Tavern near Gate K1, a Travelers Aid desk at Gate K2 and the Terminal Transfer Bus stop at Gate K20.
Concourse L	L1A–L28 26 gates L1A, L1B, L2A, L2C, L3, L4, L5, L6A, L6B, L7, L8, L9, L10A, L10B, L10C, L11, L12, L20, L21, L22, L23, L24, L25, L26, L27, L28	Terminal 3. Gold Coast Dogs near Gate L4 and Burger Federation near Gate L20.
Concourse M	M1–M40 36 gates M1, M2, M3, M4, M5, M6, M7, M8, M9, M10, M11, M13, M14, M15, M16, M17, M18, M19, M20, M21, M24, M25, M26, M27, M28, M29, M30, M32, M33, M34, M35, M36, M37, M38, M39, M40	Terminal 5, the international terminal, with U.S. Customs. A Delta Sky Club (listed at Gate M13), the Terminal Transfer Bus stop at Gate M13, and the LOT Business Lounge at Gate M18.

How to get to your gate at O'Hare

Check your terminal first. United uses Terminal 1 (Concourses B and C), American uses Terminal 3 (Concourses G, H, K and L), and Terminal 2 (Concourses E and F) has airlines such as Alaska, JetBlue and Spirit. Terminal 5 holds Concourse M.

Terminals 1, 2 and 3 are linked on the secure side. If your gate is in another of these terminals, stay past security and follow the overhead signs. O'Hare doesn't publish walking times between concourses, so leave extra time if your gate is far away.

Getting to Concourse M in Terminal 5

Terminal 5 is O'Hare's international terminal, with U.S. Customs and Border Protection. It has no secure connection to Terminals 1, 2 and 3.

The Airport Transit System (ATS) is a free train that links Terminals 1, 2, 3 and 5. It runs 24 hours a day, every 3 to 5 minutes at peak times. You leave security at one end and go through it again at the other.

Connecting passengers can stay airside on the Terminal Transfer Bus. It runs every 15 minutes from 11:30 a.m. to 9:30 p.m., on two routes: Terminal 1 to Terminal 5, and Terminal 3 to Terminal 5. You need a same-day departing flight from the terminal you are going to, and a boarding pass. Stops:

Terminal 1: Gate C18B (the Gate B1 stop is temporarily closed)
Terminal 3: Gates G17 and K20
Terminal 5: Gate M13

Domestic and international concourses

Concourses B to L, in Terminals 1, 2 and 3, are the domestic side. Concourse M, in Terminal 5, is the international one.

Watch out: some airlines fly international departures from Terminal 1 or 3 but land at Terminal 5. O'Hare's airline map lists United, ANA and Lufthansa departures in Terminal 1, and American, British Airways, Iberia and Japan Airlines departures in Terminal 3. Their international arrivals use Terminal 5. Check your boarding pass.

Reading the gate numbers

Each concourse shows its first and last gate, for example B1 to B24. Not every number in between is used: there is no B13, and Concourse L jumps from L12 to L20. Some gates carry a letter, such as C10A, G1A and G1B, or L10A to L10C.

Open the gate list of a concourse to see every gate, or type your gate in the finder above. Gates can change, so check your boarding pass and the airport screens.

Questions travelers ask

How many gates does O'Hare have?

The gate directory of O'Hare's official interactive map lists 213 gates across nine concourses (checked October 10, 2026): 22 in B, 32 in C, 17 in E, 25 in F, 20 in G, 19 in H, 16 in K, 26 in L and 36 in M.

Which terminal is my gate in at O'Hare?

The letter of your gate gives the concourse, and each concourse belongs to one terminal. Concourses B and C are in Terminal 1, E and F in Terminal 2, G, H, K and L in Terminal 3, and M in Terminal 5.

Can I walk from Terminal 1 to Terminal 5 at O'Hare?

Not past security. Terminals 1, 2 and 3 are linked on the secure side, but Terminal 5 is not. Take the free ATS train, which runs 24 hours a day, or the Terminal Transfer Bus if you are connecting (11:30 a.m. to 9:30 p.m., same-day flight needed).

Which concourse is international at O'Hare?

Concourse M, in Terminal 5, where U.S. Customs and Border Protection is located. Some airlines, including United and American, fly international departures from Terminals 1 and 3, but their international flights land at Terminal 5.

Is there a Terminal 4 at O'Hare?

No. O'Hare's terminals are numbered 1, 2, 3 and 5. The ATS train stops at Terminals 1, 2, 3 and 5 and at the Multi-Modal Facility.

More at ORD

ParkingOfficial lots, cheaper off-site options and where to wait for pickups. HotelsHotels at and near the airport, shuttles and sleeping in the terminal. To the cityTrains, buses, taxis, rideshare and private transfers. LoungesWhich lounge is in your terminal and how to get in without status. SecurityWait times by terminal, fast lanes and what to have ready. FoodBest bites terminal by terminal, before or after security. Lost and foundWho to contact: your airline, the terminal or the airport. Car rentalWhere the rental counters are and how to reach them. WifiHow to connect, charging spots and an eSIM if you land abroad.

Sources and last check

Checked by our team on Oct. 10, 2026 against these official sources: