Why are some flights cheaper than others?

Related questions

1. Are travel agents still worth it?
2. Does Korean Air offer free stopover?
3. Are flight tickets cheaper at the airport?
4. Are there still travel agents?
5. Can you check into a hotel at any time?
6. Do hotels give discounts for long stays?
7. Does teletext still exist?
8. How long do round trip tickets last?
9. What is the longest layover allowed?
10. Is it cheaper to book hotels directly?

Tags

1. #empty
2. #increase
3. #charge
4. #people
5. #price
6. #their
7. #others
8. #airlines
9. #which
10. #higher
11. #becauase
12. #where
13. #about
14. #encourage
15. #flights
16. #reduce
17. #perform