| Rank | Search Term | Volume |
| 1. | southwest airlines | 9.42% |
| 2. | american airlines | 3.78% |
| 3. | united airlines | 2.90% |
| 4. | continental airlines | 2.88% |
| 5. | delta airlines | 2.28% |
| 6. | us airways | 2.01% |
| 7. | jet blue | 1.80% |
| 8. | northwest airlines | 1.75% |
| 9. | southwest | 1.61% |
| 10. | delta | 1.55% |
| Source: Hitwise | ||