Terminal 3 at O'Hare: Concourses G, H, K and L and the Rotunda

Terminal 3 has four concourses, G, H, K and L, and any of its four checkpoints leads to all of them. The Rotunda, near Gates G1 and H1, holds the Yoga Room and the USO. The bus to Terminal 5 leaves from Gate G17 and Gate K20.

Checkpoints 6, 7, 7A and 8

All four are on the Departures and Check-In level.

Checkpoint 7’s PreCheck hours begin after its listed 8 p.m. closing, and the airport doesn’t explain the overlap. Our security page lists every checkpoint, and our checkpoint guide compares the lanes.

The Rotunda: Yoga Room and USO

Both rooms are on the Mezzanine level of the Rotunda, after security.

The Yoga Room is open daily from 6 a.m. to 10 p.m. It has exercise mats, and a monitor on the wall shows yoga techniques. Shoes come off at the door, and food and drink stay outside. A public restroom on the Mezzanine can be used for changing, and a Mother’s Room sits next door.

The USO is by Concourse G and open 9 a.m. to 5 p.m. The center’s number is (773) 601-9500, and the airport says its hours are “subject to change based on volunteer availability.” It serves active military personnel and their dependents with free refreshments, internet access, a TV lounge and gaming. Terminal 2’s USO is open until 9 p.m. but sits before security.

Concourse G: Gates G1A to G21

Concourse H: Gates H1A to H18

The airport’s terminal map places O’Briens Restaurant & Bar at Gate H5, while its eat directory lists it near Gate H6 / K6.

Concourse K: Gates K1 to K20

Farmer’s Fridge units open 24 hours stand near Gates K6 and K15, and the airport’s map lists 24-hour snack and drink machines near Gates K1 and K15.

The airport lists the K10 currency exchange from 7 a.m. to 4:30 p.m. Its map shows:

• Monday: 7 a.m. to 8:30 p.m.
• Tuesday and Wednesday: 11:30 a.m. to 8:30 p.m.
• Thursday and Friday: 7 a.m. to 8:30 p.m.
• no weekend hours

Concourse L: Gates L1A to L28

Concourse L has Mother’s Rooms at Gates L6 and L26, though the airport’s terminal map puts the first near Gate L6A. The service animal relief area at Gate L26 is at the end of the hall across from the windows, and the map lists a second one next to Gate L5.

Lounges: Admirals Clubs and the Flagship

The airport’s lounge page lists Admirals Clubs at Gates G8, L2A and H6/K6 and gives the Flagship Lounge Gate H6/K6. Its terminal map agrees, with an Admirals Club at Gate H6 beside the Flagship Lounge. The Admirals Clubs admit Admirals Club members, including holders of the Citi / AAdvantage Executive World Legend Mastercard, and Japan Airlines and Iberia customers whose fare or status includes lounge access. American’s club page also lists a One-Day Pass and warns that access may be limited or unavailable depending on lounge capacity.

The Flagship Lounge admits First and Business customers flying American, a oneworld airline or Aer Lingus on a same-day international flight between the U.S. and Europe, Asia, Australia, the Middle East, New Zealand or most of South America. AAdvantage Executive Platinum, Platinum Pro and Platinum members get in on those flights too. American’s Flagship page also names flights between Chicago and Honolulu or Maui as qualifying for First and Business, and lists a Single Visit Pass at $150 or 15,000 AAdvantage miles per person, subject to lounge capacity.

The airport’s lounge page lists no opening hours, but the airport’s terminal map gives daily hours:

American’s own Flagship page lists that lounge as open 4:15 a.m. to 10:15 p.m. Our Admirals Club and Flagship guide covers who gets in.

The information desk at Gate K2

The airport’s Travelers Aid page and its terminal accessibility page both put Terminal 3’s information desk at Gate K2. Weekday hours match, 8 a.m. to 8 p.m. The pages split on weekends: Travelers Aid says 10 a.m. to 8 p.m. on Saturday and Sunday, and the accessibility page says 10 a.m. to 7 p.m. The accessibility page also lists a lower-level desk near Door 3C, open 10 a.m. to 8 p.m. every day. Our information desks page lists the desks at every terminal.

The bus to Terminal 5 from Gates G17 and K20

The Terminal Transfer Bus runs from Terminal 3 to Terminal 5 every 15 minutes between 11:30 a.m. and 9:30 p.m. It carries connecting passengers only, and you need a boarding pass for a same-day flight from Terminal 5. Its Terminal 5 stop is Gate M13. Between 9:30 p.m. and 11:30 a.m., the airport says to leave security, take the Airport Transit System and clear a TSA checkpoint again.

Terminal 3 has pedestrian connections on the secure side to Terminal 1 and Terminal 2. The airport gives no walking time. Our walking guide covers the walk between Terminals 1, 2 and 3.

Check-in, parking and the Blue Line

Aer Lingus, American Airlines, British Airways, Contour Airlines, Iberia and Japan Airlines check in on the Departures and Check-In level. American has separate international, Priority and Flagship counters. It also has self check-in kiosks on both levels and curbside check-in.

Premier Parking is under 300 feet from Terminal 3. For the Blue Line, follow the Trains to City signs through the pedestrian tunnels on the basement level.

Sources

• Terminal 3, Security checkpoints, Flagship Lounge, Military lounge, Spa and yoga, Information desks, Terminal Transfer Bus, Airport Transit System, Premier Parking and CTA Blue Line
• Chicago Department of Aviation: TSA information, USO, airline lounges, transportation between terminals, Travelers Aid and terminal accessibility pages, and the terminal map
• American Airlines: Admirals Club and Flagship lounge pages