What is aa flexible fare?

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Tags

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2. #american
3. #earning
4. #displays
5. #pricing
6. #booking
7. #change
8. #additional
9. #flexibility
10. #checked
11. #boarding
12. #airlines
13. #priority
14. #other
15. #benefits
16. #include
17. #standby
18. #features
19. #ability
20. #round
21. #aadvantage
22. #miles
23. #quickly