Airlines Servicing O'Hare Airport
| Airline | Terminal | Phone Number |
| Aer Lingus | Terminal Five | 1-888-474-7424 |
| Aero Mexico | Terminal Five | 1-800-237-6639 |
| Air Canada | Terminal Two | 1-888-247-2262 |
| Air Canada Jazz | Terminal Two | 1-888-247-2262 |
| Air France | Terminal Five | 1-800-237-2747 |
| Air India | Terminal Five | 1-800-621-8231 |
| Air Jamaica | Terminal Five | 1-800-523-5585 |
| Alaska Airlines | Terminal Three | 1-800-252-7522 |
| Alitalia | Terminal Five | 1-800-223-5730 |
| All Nippon | Terminal 1 and Terminal 5 | 1-800-235-9262 |
| American Airlines | Terminal Three (Domestic and international departures) Terminal Five (International arrivals only) | 1-800-443-7300 |
| American Eagle | Terminal Three | 1-800-433-7300 |
| America West | Terminal Two | 1-800-428-4322 |
| Asiana Airlines | Terminal Five | 1-800-227-4262 |
| Austrian Airlines | Terminal Five | 1-800-843-0002 |
| British Airways | Terminal Five | 1-800-247-9297 |
| BMI British Midland | Terminal Five | 1-800-788-0555 |
| Cayman Airways | Terminal Five | 1-800-422-9626 |
| Continental Airlines | Terminal Two | 1-800-525-0280 |
| Delta Air Lines | Terminal Three | 1-800-221-1212 |
| El Al | Terminal Five | 1-800-223-6700 |
| Iberia Airlines | Terminal Three (Departures only) Terminal Five (Arrivals only) | 1-800-772-4642 |
| Japan Airlines (JAL) | Terminal Five | 1-800-525-3663 |
| Jet Blue | Terminal Two | Link to Contact Numbers |
| KLM Royal Dutch | Terminal Five | www.nwa.com/travel/nwati |
| Korean Air | Terminal Five | 1-800-438-5000 |
| LOT Polish Airlines | Terminal Five | 1-212-789-0970 |
| Lufthansa | Terminal One (Departures only) Terminal Five (Arrivals only) | 1-800-645-3880 |
| Mexicana | Terminal Five | 1-800-531-7921 |
| Northwest Airlines | Terminal Two | 1-800-225-2525 (domestic) 1-800-447-4747 |
| Royal Jordanian | Terminal Five | 1-800-223-0470 |
| Scandinavian Arlines (SAS) | Terminal Five | 1-800-221-2350 |
| Spirit Airlines | Terminal Three | 1-800-772-7117 |
| SWISS | Terminal Five | 1-877-359-7947 |
| TACA Airlines | Terminal 5 | 1-800-400-TACA |
| Ted | Terminal One | 1-800-225-5833 |
| Turkish Airlines | Terminal Five | 1-800-874-8875 |
| United Airlines | Terminal One (Domestic and international departures only) Terminal Two Terminal Five (International arrivals only) | 1-800-241-6522 |
| United Express | Terminal One Terminal Two |
1-800-241-6522 |
| US Airways | Terminal Two | 1-800-428-4322 |
| USA 3000 | Terminal Five | 1-877-872-3000 |
| Virgin Atlantic | Terminal Five |
Link to phone numbers |