Originally Posted by
livitup
Well, that explains why I couldn't find any D's then. Perhaps I should give my TA more credit. This is probably because IAD/BRU planes are constantly full of EU or World Bank Executives flying back and forth for one meeting or another. UA is no dummy!

Not so fast!
Ask your TA to check fares BRU-IAD-BRU. There is a full flexible, no min stay, no AP Z fare for about $4100+, and if you can't find Z space, there is a full flex D fare for $5400+. In fact, full C is only $6500 ex-BRU.
Of course, this is all academic in my mind since I would be on LH and upgrading to OOOOOOO class!

^