Here’s a list of some major airlines along with their U.S. toll-free (1-800) customer service numbers. Please note that these numbers may vary based on location, and it’s always best to verify directly with the airline.

U.S. Airlines:

1. American Airlines: 1-800-433-7300
2. Delta Air Lines: 1-800-221-1212
3. United Airlines: 1-800-864-8331
4. Southwest Airlines: 1-800-435-9792
5. JetBlue Airways: 1-800-538-2583
6. Alaska Airlines: 1-800-252-7522
7. Spirit Airlines: 1-855-728-3555
8. Frontier Airlines: 1-801-401-9000
9. Hawaiian Airlines: 1-800-367-5320

International Airlines:

1. Air Canada: 1-888-247-2262
2. British Airways: 1-800-247-9297
3. Lufthansa: 1-800-645-3880
4. Qatar Airways: 1-877-777-2827
5. Emirates: 1-800-777-3999
6. Air France: 1-800-237-2747
7. KLM Royal Dutch Airlines: 1-800-618-0104
8. Cathay Pacific: 1-800-233-2742
9. Singapore Airlines: 1-800-742-3333
10. Qantas Airways: 1-800-227-4500
11. Turkish Airlines: 1-800-874-8875
12. Japan Airlines: 1-800-525-3663
13. Etihad Airways: 1-888-838-4423
14. Ethiopian Airlines: 1-800-445-2733

If you need a specific airline not listed here, feel free to ask!