Air China complaints phone number: 00800-86-100-999 Air France complaints phone number:  020-7660-0337 Alaska Airlines complaints phone number: 00-1-800-252-7522 All Nippon Airways complaints phone number: 020-8762-8977 Allegiant Air complaints phone number: 702-505-8888 American Airlines complaints phone number: 800-433-7300 Delta Air Lines complaints phone number: 1-800-221-1212 Southwest Airlines complaints phone number: 1-800-435-9792 Spirit Airlines complaints phone number:  801-401-2222 United Airlines complaints phone number: 1-800-864-8331