1. It's too expensive.
2. I don't get enough time off work.
3. I'm worried about my safety.
4. I'm afraid my bags will get lost.
5. I don't like flying.
6. I'm afraid I'll get sick while I'm traveling.
7. I'm afraid of terrorist attacks.
8. I'm afraid of getting robbed.
9. I don't speak other languages.
10. I wouldn't know what to do or where to go.
(New York Post)