Why do flight prices change so fast?

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Tags

1. #expect
2. #generally
3. #lower
4. #because
5. #least
6. #fares
7. #prices
8. #purposefully
9. #start
10. #operate
11. #different
12. #flight
13. #might
14. #change
15. #sales
16. #airlines
17. #raise
18. #every
19. #offer