Originally Posted by ClipperClub
Not sure if you reeeeaaallly want United only, but Lufthansa used to sell some seats on their website. Been a while since I have seen them, but might be worth a look.
I'm not sure about their website, however LH does still sell them. The contact name and number are on the flight map of their inflight magazine, however I don't have one with me. If someone wants, I'll pick one up when I fly them in a couple of weeks again.
Will