Thanks Syd. To clarify: the *only* circumstance I'd be able to come in person is if the treatment timeline gets moved up (possible, but not super likely. People tend not to cancel their cancer surgeries).
With my treasurer hat on: We have in the past covered folks who had to cancel an already-purchased flight, and I can't imagine we wouldn't do so again if necessary. If it's due to something like a quarantine or imposed travel restriction, then airlines are reasonably likely to be forgiving (though they will be a pain in the ass about documentation). As Syd says though, I would definitely not opt for the cheaper pre-paid hotel reservation.
We're still a couple of months out, so we may be past the period of large-scale quarantine measures by then.
Hugh