If things continue, you will be able to bid to IAD quickly. You may get lucky and get it out of indoc - there were unfilled IAD 737 and 320 vacancies on the last big bid. IAD has every fleet at United. I did the IAD-EWR commute for a couple months - lots of flights from IAD/DCA and I could drive it in 3+45 if required. They also have the Metro Silver line expansion running between IAD and DCA. I hear about an hour to 1+30 to get between the two depending on the day.
Lots of rumors of growth at IAD and they just awarded a contract to build a new terminal. The links below has a few nice renderings - supposed to be complete in 2026.
https://www.flydulles.com/news/dulle...gate-concourse
https://northernvirginiamag.com/cult...ulles-airport/