Sorry about that my thought process started somewhere and went the longest way possible. As for the flight times;

Original Booking: 1:36PM IAD-CLT-LAX-DEN 11:29PM.
Replaced with: 9:20AM IAD-CLT-DEN 1:36PM

I was unhappy with that replacement as I will be in crystal city, so I thought that getting to IAD could be a problem early in the morning. I phoned up to ask if there was anything later (there wasn't, so I asked about DCA of which I was told there were a couple, but I would have to pay. During that phone call, the lady put the phone down midway through. The next day I discovered that my booking had changed as follows;

12:10PM DCA-DFW-DEN 4:45PM

I have to admit I was somewhat irritated that she had changed the routing when she was only supposed to be checking it. Equally, all the replacement routes are at least £300 cheaper to buy as opposed to what I had originally paid for, but when I phoned up the first time I was told I couldn't get any money refunded until after the flights.