Originally Posted by
jsloan
UA's clear intent is to allow these planes to be as interchangeable as possible. Even if there were some such subtle detail, it would probably only appear when an actual plane is assigned to the route 3-4 days prior to travel, and it would be subject to change after that.
I know this is probably true, and I can’t believe I am having to say this... But this will actually become material to me in how I book in the future. If I cannot guarantee that my flight will have air vents, that very well could be a factor in causing me to book with another airline. As a ~10yr GS, I don’t make that statement easily. But a “hot sleeping” atmosphere is absolutely a big deal to me. Today it’s easy to avoid CO777s. But I can’t easily avoid ALL UA 777s.