Thanks, I wasn't thinking that through well. They have to work the following morning, so arriving too late is going to be rough on them. I guess they'll have to leave either a little bit earlier from PDX (we need to keep Sunday morning/early afternoon free in case the intervention doesn't happen on Saturday for some reason), or arrive a little bit later at IAD.

There's a SMALL chance we'll get our daughter into detox/rehab prior to this Saturday, in which case it would be extra helpful if all flights and hotels could also be refundable in some way, or another. I know that's probably asking too much, though. :-/