Managed to navigate from D1 to J5 at MIA without requiring oxygen. That is unbelievably far – I’m going to guess nearly a mile. It’s all the way from one end of the airport to the other at MIA.
Anyway, all checked in and got our seat snafu straightened out with the very kind agent at the LAN ticket counter.
Now just sitting in the LAN Club waiting for a 22:00 boarding time to Santiago!