In Memoriam, FlyerTalk Evangelist
Join Date: Jun 2000
Location: Benicia CA
Programs: Alaska MVP Gold 75K, AA 3.8MM, UA 1.1MM, enjoying the retired life
Posts: 31,849
They're not matching the cities you listed because they do not compete against Southwest on those routes. Look at Baltimore and Tampa, for instance, where they do compete.
There are also some very good winter fares to Europe that must be booked on the UA web site in the $400 range.