| Rank | Search Term | Volume |
| 1. | southwest airlines | 6.95% |
| 2. | american airlines | 3.85% |
| 3. | delta airlines | 2.83% |
| 4. | united airlines | 2.62% |
| 5. | continental airlines | 2.59% |
| 6. | northwest airlines | 1.94% |
| 7. | Southwest | 1.85% |
| 8. | us airways | 1.84% |
| 9. | Delta | 1.58% |
| 10. | jet blue | 1.35% |
| Source: Hitwise | ||