Perhaps you meant A321 (all new) or A319 or A320 (all refurbished).
I did. My mistake.
For WAS to SAN you would need to take DCA-LAX-SAN or WAS-JFK-SAN in order to get Delta One. However, this will cost more than the First Class routings
Correct... and Delta One is $1000 more than regular Delta First on the days/times I need it. I'm also baffled about why the one D1 flight a day from LAX-DCA is a daytime flight when I would think people would pay a premium for a lie-flat overnight. But that's for another day.
You have to prioritize what is important to you and then do the comparison.
1. Hard product: That includes a comfortable seat with maximum pitch
2. Convenience
3. Cost: On the days/times I want, Delta and Alaska are surprisingly close
4. Soft Product: Thank you, BenA! Your post addressed every concern I had. Delta it is.