It's those birds that have international capability but are in a domestic config that are the UA F ratio secret sauce --

I worry about the 83 757s at 13% F that go to 9% if you convert them to international --- and whole United fleet goes from 10-11% to 8-9% if you do that.

At least if the domestic 777 or 763s gets converted you get a higher ratio of first/business seats than pre-convert.

But if they keep reducing domestic capacity in favor of international your mix will shift toward the 737s/Airbus planes, where we so far see less F is the case when you place Economy Plus. Hope that is wrong.