How do open ended tickets work?

Related questions

1. Is Qatar Airways economy good?
2. Can I take my phone charger in my carry on?
3. What is an open airline ticket?
4. What counts as a personal item?
5. Are open ended tickets more expensive?
6. Can I buy a round trip ticket without a return date?
7. What is the difference between economy and economy Flexi?
8. What is economy Flexi on Qatar?
9. How long does a round trip ticket last?
10. What is a basic economy flight?

Tags

1. #control
2. #purchase
3. #ticket
4. #postpone
5. #comes
6. #flight
7. #return
8. #airlines
9. #airline
10. #schedule
11. #departure
12. #allow
13. #reschedule
14. #require
15. #freedom
16. #ended
17. #round
18. #allows
19. #price
20. #travel