Originally Posted by jackal

I think he's asking about where to find the fare rules that specify the expiration date of the fare. I know that information can be found on ExpertFlyer; it may be available on ITA, but I haven't ever bothered to look for it there.

Note that just because a fare has a published expiration three weeks from now doesn't mean it'll still be there. The airline can change the fare at any time, or it can sell out at any time, too.