Availability of reward travel tickets varies greatly by carrier, according to a recent study. Here is the list of the 22 airlines included -- from best to worst -- when it comes to finding round-trip tickets using airline miles at their lowest reward level:
1. Southwest
2. Air Berlin
3. Air Canada
4. Virgin Blue
5. Lufthansa/SWISS/
Austrian
6. Singapore Airlines
7. Iberia
8. Alaska Airlines
9. Jet Airways
10. Qantas Airways
11. Continental Airlines
12. United Airlines
13. AirTran Airways
14. Cathay Pacific
15. British Airways
16. SAS Scandinavian
17. American Airlines
18. Air France/KLM
19. Emirates
20. Turkish Airlines
21. Delta Air Lines
22. US Airways
Sources: IdeaWorks and ezRez Software