| Rank | Search Term | Volume |
| 1. | southwest airlines | 9.92% |
| 2. | american airlines | 3.68% |
| 3. | united airlines | 2.86% |
| 4. | continental airlines | 2.74% |
| 5. | delta airlines | 2.22% |
| 6. | northwest airlines | 1.83% |
| 7. | us airways | 1.80% |
| 8. | southwest | 1.71% |
| 9. | delta | 1.61% |
| 10. | allegiant air | 1.40% |
| Source: Hitwise | ||