Originally Posted by
hobo13
Technically, the routing for a DBC FREE itin must remain the same. i.e. if you book ORD-DEN-LAX-SFO, you can change the dates, but must continue to fly ORD-DEN-LAX-SFO. If you change the connecting cities, you have to pay $100.
If a schedule change breaks your connection, I imagine you get a free re-route to something of your choosing. Whether UA will view a 10-min reduction in connection time as 'breaking your connection' is the real question. Give it a try. Claim you are horrified at the thought of sprinting around IAD and I expect you'll be OK.
50 minutes is plenty of time to make a connection at IAD. You aren't likely to get UA to change your ticket to a different connecting city unless you want to pay a change fee, but YMMV.