| Rank | Search Term | Volume |
| 1. | southwest airlines | 8.84% |
| 2. | american airlines | 3.67% |
| 3. | united airlines | 3.21% |
| 4. | continental airlines | 3.08% |
| 5. | delta airlines | 2.32% |
| 6. | us airways | 2.21% |
| 7. | northwest airlines | 2.08% |
| 8. | southwest | 1.80% |
| 9. | delta | 1.55% |
| 10. | jet blue | 1.51% |
| Source: Hitwise | ||