Alaska Airlines: Call (800) 252-7522 to get local contact numbers or Central Baggage Claim at (206) 988-9797. Hours: 10 a.m. to 3 p.m. PT., Monday-Friday
American Airlines: Call (800) 535-5225 to get the number for the appropriate local Lost and Found departments
Continental Airlines: Call (800) 525-0280 to get the local airport contact numbers
Delta Airlines: Call (800) 221-1212 for local contact numbers or Baggage Services at (800) 325-8224. You can also e-mail them at: bsc.atl655@delta.com to describe your lost item
Jet Blue: Call (800) 538-2583 to get local contact numbers
Northwest Airlines: (800) 225-2525 to get a contact number at the local airports
Southwest: Call the Central Lost & Found office at (214) 792-5598 during business hours.
US Airways: Call (800) 428-4322 for a local contact number
United Airlines: Call Baggage Services/Lost & Found at (800) 221-6903
Or Call The TSA's Consumer Response Center 866-289-9673
Source: LA Times