Hello all. I really very much appreciate all of the help. I have enjoyed watching the discussion unfold.
But, I think that, after considering the options, and what I need for my story, I am going to go with ATSF to Wichita, then the SF Chief to Needles CA, then bus.
Since so many of you worked hard on this I feel like you deserve some explanation. My character is someone who realizes early on that Friday morning (11/22/63) that she needs to leave town, ASAP. She's a hooker, and she's probably not the brightest bulb in the pack. But she figures buses run more frequently that trains, so gets a cab to Greyhound, and the first thing going is to OKC, so that's where she winds up. After taking care of some errands, mainly related to changing her appearance, she tells a cabbie she wants to get a train out of town, and the cabbie drops her at the Santa Fe station. When she says she wants to go to Las Vegas, the clerk, who is a gruff, unfriendly type, simply books her ATSF all the way to Needles, and tells her she'll have to bus it from there. He's a company man.
Now, I'd rather have it be Kingman AR (probably more buses from there?), but my 1959 OG appears to indicate that the Chief does not stop there. (I don't get this.) So for now I am thinking Needles. The option to continue to the UP @ Barstow makes no sense.
My OG shows that my character can leave on a northbound from OKC to Wichita at around 6:00pm, arr in Wichita @ 9:15, then catch a westbound Chief at around 3:00 am Sat. Arr Needles about 24 hours later, if I remember correctly.
This works best for my story because I need her to be stuck for a while in Oklahoma City, where she will see some of the JFK assassination coverage on TV (in a television store). I need certain things to happen back in Dallas, and for her to have knowledge of them by seeing them on TV, before she boards the train.
That's my story and I'm sticking to it, unless you guys tell me that there is some reason my scenario is flat-out impossible. Remember, the story only has to be plausible, not likely. And trust me, there will be a fair amount of stuff that won't jive with the Warren Commission report! It's a fictional tale. It implies a conspiracy, but the story is not really about the conspiracy or the assassination. It's about my character, the young hooker.
If the story gets published, I'll come back on this forum and let you folks know where.
Again, I am very grateful for the help.