I have four certificates exchangeable for 20,000 Miles on Spirit Airlines. 20,000 miles is good for one roundtrip flight most places they serve, or one way to basically anywhere including Central and South America.
If you sign up for a Spirit Airlines mastercard you could use them 20,000 miles for up to 8 individual fights (4 roundtrip).
You can check out the details here:
http://doublizer.com/awards/awards.php
and here:
http://www.spirit.com/content/docume...chart_2011.pdf
The codes expire on the 10th of June, so you have to enter them in your account before that time, the miles will then be credited within 30 days, then you have to book travel within 30 days after that, but you can book the travel as far out into the future as you would like. You can only use one per free spirit account, but you can buy travel for other people.
$299 each.
