Why is flying so expensive?

Related questions

1. Why are European flights so cheap?
2. Do flights get cheaper as the date gets closer?
3. Should I eat out or cook?
4. Is it worth getting a rail pass in Europe?
5. Is the Eurail Pass worth it?
6. What is OMIO com?
7. Do I have to go through customs for a connecting flight in London?
8. Is it cheaper to cook or eat out?
9. Do I have to go through customs for a connecting flight in Amsterdam?
10. Is London Pass worth?

Tags

1. #passengers
2. #travel
3. #between
4. #ticket
5. #every
6. #there
7. #expensive
8. #accounts
9. #makes
10. #percentage
11. #while
12. #price
13. #common
14. #require
15. #misconception
16. #traveler
17. #gallons
18. #broken
19. #small