Travelocity does actually give all the fares.
To have it list it, click on 'more search option' .
on the next screen if you pick the ' My dates are flexible' option and search only one airline it will give you all the fares available for the time frame you set.
it is a kind of long process because on the next screen you have to click on any single "rules" per fare to know what fare it is.
When you get used to it a little is not that bad.
docs