Can anybody please explain to me what the difference is between doing PLAN B, and just the regular booking economy, call up to wait list for upgrade?
What I mean to ask...I have a booking on EWR-FRA in economy, and I see like 35 seats available in biz, UA will definitely release more seats closer to the flight, will I get business automatically when they release it or I need to do something.
My problem is that I booked my itinerary online already, so I don't want to cancel and wait for it to be put back in inventory, and then call for plan B. I want to just upgrade the economy leg.