Scoring free airline vouchers

A free roundtrip ticket sounds like a good deal, but the travel voucher is totally the way to go. The roundtrip ticket is usually subject to blackout dates and all sorts of other restrictions which greatly limit when and where you can fly. Additionally, free roundtrip tickets are usually exempt from earning frequent flier miles. Travel vouchers, on the other hand, can be used just about any time, anywhere and the flights you purchase usually earn miles.