Details aren’t available online yet, but Flyertalkers discovered it (and Lucky has mentioned it as well). United’s “FALL 2009 ECON AWARD SALE – MPW039” is now live — a 20% discount on coach awards flown entirely on United flights between August 18 and November 18.

So a good time to redeem if you like to redeem for coach, and if you’re a 1K who already has some coach redemptions on United flights and award space is still available for those flights you can call back and reticket and save some points (1Ks only, of course, as anyone else would have to pay a fee to redeposit the miles).