Originally Posted by CloudsBelow

Thank you for the overview.
Believe I am in the same situation as the poster you helped. If you can imagine, I cancelled (what I thought) was a more cumbersome connection to connect in IAD. (Hoped my UAX would go into D/C but looks as though it's A

Looks as if I'm in on UAX into the A gates, out of C20 with only 40 minutes to connect.

Are the signs/trains show destination of Terminal D?

Is it all walkable or walk/train/walk (I'm just not sure how long the wait for train might be).

I'm assuming A/B and C/D are just each two long terminals. With a train in between? Thanks for any advice/help