On the website, I don't believe so. On ITA software, you can see what the price would be for a respective fare, and then see if Reservations can ticket it.

On ITA, if you were going from SFO-ORD, and you wanted a Q fare, you would input:

From - "SFO:: UA+ / f bc=q"
To - "ORD:: UA+ / f bc=q"

www.itasoftware.com