Originally Posted by
jsloan
The only other thing to try is to look for flights that connect inside the US to another destination, and then leave the plane at the transfer point. This can be difficult with checked baggage. This is also contrary to UA's published rules, but as long as you don't make a habit of it, there's unlikely to be a problem.
This may be possible at EWR, but it is NOT at IAD due to the mid-field immigration/TSA where you'll be sent if you have a connecting flight.
(I'm presuming the OP will have check baggage due to their health issues)