Which airlines use Terminal 3 at O'Hare International Airport?

Terminal 3 at O'Hare International Airport is used by Aer Lingus, American Airlines, British Airways, Iberia, and Japan Airlines.

How do I transfer from Terminal 3 to other terminals?

From Terminal 3 you can transfer to: Terminal 1 by walking (15 min, no re-screening), Terminal 2 by walking (8 min, no re-screening), Terminal 5 by train (40 min, re-clear security), and Terminal 5 by shuttle bus (20 min, no re-screening).

Do I need to clear security again when transferring from Terminal 3?

It depends on the route — some transfers from Terminal 3 stay inside security while others require re-clearing it. Check each route above.

Terminal 3 is part of O'Hare International Airport (ORD), the airport serving Chicago, United States.

O'Hare International Airport Terminal 3

at O'Hare International Airport

American Airlines (concourses G, H, K, L).

Terminal 3 is a terminal at O'Hare International Airport (ORD) in Chicago, United States. It is used by 5 airlines: Aer Lingus, American Airlines, British Airways, Iberia, and Japan Airlines. Transfer connections to 4 other terminals are available from here. Quickest transfer: Terminal 2 by walking (8 min, no re-screening).

Official O'Hare International Airport websiteTerminal data updated August 10, 2026

Airlines using this terminal

Airline	Direction	Note
EIAer Lingus	Departures & arrivals	Aer Lingus sits with oneworld partner American Airlines in Terminal 3.
AAAmerican Airlines	Departures & arrivals	American Airlines.
BABritish Airways	Departures	Departures moved from Terminal 5 to Terminal 3 in April 2024, using American Airlines gates.
IBIberia	Departures	Iberia departs from Terminal 3, using oneworld partner American Airlines’ gates.
JLJapan Airlines	Departures	Japan Airlines departs from Terminal 3, using oneworld partner American Airlines’ gates.

Transfers from this terminal

T3T1To Terminal 1
by walking· 15 minStays inside security
One secure-side pedestrian route links Terminals 1, 2 and 3 — follow the overhead signage, no need to leave security or ride the ATS.
Transfer T3 → T1
T3T2To Terminal 2
by walking· 8 minStays inside security
Connected airside by underground walkways.
Transfer T3 → T2
T3T5To Terminal 5
by train· 40 minRe-clear security
Outside the Terminal Transfer Bus hours (21:30–11:30) you must exit security, ride the Airport Transit System (ATS) and be re-screened at Terminal 5 — allow for the checkpoint, not just the train.
Transfer T3 → T5
T3T5To Terminal 5
by shuttle bus· 20 minStays inside security
Secure airside Terminal Transfer Bus between Terminal 3 (Gates G17 and K20) and Terminal 5 (Gate M13), every 15 minutes from 11:30 to 21:30 — connecting passengers with a same-day boarding pass only, and no re-screening.
Transfer T3 → T5

Frequently asked questions

Which airlines use Terminal 3 at O'Hare International Airport?: Terminal 3 at O'Hare International Airport is used by Aer Lingus, American Airlines, British Airways, Iberia, and Japan Airlines.
How do I transfer from Terminal 3 to other terminals?: From Terminal 3 you can transfer to: Terminal 1 by walking (15 min, no re-screening), Terminal 2 by walking (8 min, no re-screening), Terminal 5 by train (40 min, re-clear security), and Terminal 5 by shuttle bus (20 min, no re-screening).
Do I need to clear security again when transferring from Terminal 3?: It depends on the route — some transfers from Terminal 3 stay inside security while others require re-clearing it. Check each route above.
Where is Terminal 3?: Terminal 3 is part of O'Hare International Airport (ORD), the airport serving Chicago, United States.

Book your airport transfer

Private door-to-door rides at a fixed price.