How do I reserve seats on Austrian Airlines?

Related questions

1. Does Austrian Airlines have premium economy?
2. What is economy red ticket?
3. Does Austrian Airlines charge for seats?
4. What is Lufthansa premium economy?
5. Does Austrian Airlines weigh your carry on?
6. What is a booking class?
7. Can I earn United miles on Lufthansa?
8. What is the main airport in Austria?
9. Where does Austrian Airlines fly?
10. When can I check in Austrian Airlines?

Tags

1. #online
2. #austrian
3. #displayed
4. #window
5. #credit
6. #before
7. #using
8. #category
9. #purchase
10. #hours
11. #desired
12. #flight
13. #middle
14. #departure
15. #ticket
16. #select
17. #aisle
18. #advanced
19. #later
20. #reservation