How long does a round trip ticket last?

Related questions

1. Can I buy a round trip ticket without a return date?
2. What is economy non flex on Caribbean Airlines?
3. What is economy flexible?
4. Is Qatar Airways economy good?
5. Can I get an open return flight?
6. What counts as a personal item?
7. What is a basic economy flight?
8. What is an open airline ticket?
9. What is economy Flexi on Qatar?
10. Can I buy airline tickets for someone else?

Tags

1. #airlines
2. #tickets
3. #paying
4. #change
5. #month
6. #maximum
7. #reasonably
8. #difference
9. #rates
10. #duration
11. #stays
12. #class
13. #offer
14. #often
15. #amount
16. #depending
17. #cheapest
18. #round
19. #return