You can also route through YVR or YYZ, both of which have late departures that would allow you to catch an evening flight from DFW. I don't believe the YYZ flight has F, but YVR does indeed.
Yeah, I just realized that on the AA flight. YVR usually has the tightest inventory of them all, so I was going for LAX first but I guess I'll let them decide. Hopefully they'll open something up. I'll repost on what happens.