What does it mean to fly standby?

Related questions

1. Why are short flights so expensive?
2. Can you still fly standby?
3. Does Lufthansa offer student discounts?
4. Will my flight be Cancelled due to snow?
5. What causes airport delays?
6. Why are airline flights so expensive?
7. How do I get a standby flight?
8. Why are 2019 flights so expensive?
9. Is wanna get away the same as standby?
10. Can students get discounts on flights?

Tags

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2. #sleep
3. #later
4. #ticket
5. #buying
6. #maybe
7. #empty
8. #today
9. #flight
10. #standby
11. #purchased
12. #generally
13. #earlier
14. #sometimes
15. #rather
16. #cheap
17. #referred
18. #seats
19. #changes
20. #means
21. #catch
22. #already