I'm flying back from SEA to JFK week of 7/7 and I was thinking about routing via SFO or LAX and using a SWU.

Couple of questions on upgrading the 32B.

1) Doesn't seem to be any C inventory available now unless I take the early AM flight which doesn't work if I want to leave SEA in AM. Does C shake loose closer and reliably so?

2) I'm thinking routing LAX-JFK would be easier to upgrade given frequencies but anybody have any experience as to whether SFO or LAX would be a better cxn for getting an upgrade?