Originally Posted by
jsloan
.... Without going through the debate again

, UA definitely still offers many domestic round-trip tickets that are priced on a round-trip basis. AFAIK, that can include refundable tickets, depending upon the city pair.
I think the OP's experience and certainty mine most domestics are OWs (to be more precise two OWs are essentially the same prices as as RT -- with a slight difference of an extra security fee for the OWs), while some markets may be different. Could this be a case of hubs vs out-stations? There may be other factor of fare class? How significant of a difference do you see?