Does anyone know which airlines offer one way redemptions? (For half the miles I mean; you can probably do a one way on any of them and just throw away the second half of the ticket). The last time I checked it seemed like American was the only one, but I could have missed something. We have quite a collection of miles on most of the airlines, but usually they're such a pain in the neck to use we just keep accumulating. Have booked a few award flights on USAir, United, and American.