In December I explained Why You Want to Get Started With the AviancaTaca LifeMiles Program Right Now.
LifeMiles is one of the best programs in the Star Alliance. There are some frustrations, like inability to book flights in more than one class of service on an award. But they sell miles cheap, their award chart is reasonable, they offer one-way awards, and the website is decent. Plus there are no fuel surcharges.
I consider the better non-U.S. programs a great hedge and refuge against the risks of revenue-based frequent flyer redemption changes.
And the AviancaTaca LifeMiles program regularly offers 100% bonuses on purchased miles and then lets you effectively buy miles even cheaper with their cash ad points awards (where you need just 40% of the miles required for a given award ticket).
Through April 30, LifeMiles will give you a 100% bonus on purchased miles (limited to one transaction/bonus only during the promotion).
Per usual practice, the offer is only open to folks whose accounts were open prior to the April 8 start of the promotion.