| Rank | Search Term | Volume |
| 1. | southwest airlines | 7.49% |
| 2. | american airlines | 4.23% |
| 3. | delta airlines | 2.92% |
| 4. | united airlines | 2.64% |
| 5. | continental airlines | 2.50% |
| 6. | us airways | 2.05% |
| 7. | northwest airlines | 1.81% |
| 8. | southwest | 1.81% |
| 9. | delta | 1.69% |
| 10. | southwest.com | 1.53% |
| Source: Hitwise | ||