| Chicago Aitkenvale | Eastern Australia Time | -16:00 |
| Chicago Röthlein | Central European Time | -07:00 |
| Chicago Airport West | Eastern Australia Time | -17:00 |
| Chicago Barnstable | Eastern Time | -01:00 |
| Chicago Air Itam | Malaysia Time | -14:00 |
| Chicago Rothschild | Central Time | 00:00 |
| Chicago Ajanta | India Standard Time | -11:30 |
| Chicago Barns Green | United Kingdom Time | -06:00 |
| Chicago Alexander Heights | Western Australia Time | -14:00 |
| Chicago Ram Nagar | India Standard Time | -11:30 |
| Chicago Alexandria Bay | Eastern Time | -01:00 |
| Chicago Barnagar | India Standard Time | -11:30 |
| Chicago Algood | Central Time | 00:00 |
| Chicago Rakovica | Central European Time | -07:00 |
| Chicago Algiers | South Africa Standard Time | -08:00 |
| Chicago Barnard Castle | United Kingdom Time | -06:00 |
| Chicago Algoma | Central Time | 00:00 |
| Chicago Rajosana | India Standard Time | -11:30 |
| Chicago Alfonso Lista | Philippine Time | -14:00 |
| Chicago Rajadewali | Pakistan Time | -11:00 |
| Chicago Alfornelos | Western European Time | -06:00 |
| Chicago Rajapalayam | India Standard Time | -11:30 |
| Chicago Alger Centre | Central European Time | -07:00 |
| Chicago Radoľa | Central European Time | -07:00 |
| Chicago Algerias | Colombia Time | -01:00 |
| Chicago Rafah | Eastern European Time | -08:00 |
| Chicago Algermissen | Central European Time | -07:00 |
| Chicago Raeford | Eastern Time | -01:00 |
| Chicago Ardross | Western Australia Time | -14:00 |
| Chicago Raf Raf | Central European Time | -07:00 |
| Chicago Ardsley | Eastern Time | -01:00 |
| Chicago Rahim Yar Khan | Pakistan Time | -11:00 |
| Chicago Åre | Central European Time | -07:00 |
| Chicago Raglan | New Zealand Time | -19:00 |
| Chicago Argenbühl | Central European Time | -07:00 |
| Chicago Rahovic | Central European Time | -07:00 |
| Chicago Argent-sur-Sauldre | Central European Time | -07:00 |
| Chicago Rainsville | Central Time | 00:00 |
| Chicago Arden | Eastern Time | -01:00 |
| Chicago Pontresina | Central European Time | -07:00 |
| Chicago Arcugnano | Central European Time | -07:00 |
| Chicago Pontian District | Malaysia Time | -14:00 |
| Chicago Alhos Vedros | Western European Time | -06:00 |
| Chicago Radda in Chianti | Central European Time | -07:00 |
| Chicago Alhandra | Western European Time | -06:00 |
| Chicago Rạch Giá | Indochina Time | -13:00 |
| Chicago Ballarat Central | Eastern Australia Time | -17:00 |
| Chicago Rạch Giá | Indochina Time | -13:00 |
| Chicago Ballina | Eastern Australia Time | -17:00 |
| Chicago Yorktown Heights | Eastern Time | -01:00 |