It seems jetway utilization is relatively high now for a smaller airport. Seems like evening arrivals can be the biggest issue. I’ve waited a few times when flying Delta. And I’m curious if the airlines will shuffle around when A is done. I’ve never quite got why United opted for B21.
I agree that jetway utilization is high for a small airport. Obviously, like most smaller airports, it is busiest in the morning and after 9 pm. A lot of the planes that come in at night get moved to hard stands to make way for other flights. I noticed the last time I was there that most of those are OO aircraft that are taken over to the maintenance hangar. However, I noticed some mainline aircraft that were moved to make room.
I think it is strange as well that UA has gates B10 and B11, then uses B21 for their third gate as opposed to B14, which is closest to B10/11. I get that B14 is limited to regional jets, but that should not be a problem for UA, especially considering the number of regional jet flights they have. Meanwhile, DL has gates B20 and B22 and uses B14 as their third gate, as opposed to B21. I'm sure there is a backstory on that. I also hope BOI renumbers the B concourse when A opens, since the numbering was done when the original terminal was still standing and makes no sense now. B currently starts with B10 and skips 12 and 13.
As for who gets Concourse A when it opens, I'd guess it will be AS and DL. AS because they currently have only one jetway, and you still have to go outside to use it. I also think because they have shifted away from the Q400s that Concourse C was designed for and more towards regional jets, which other airlines use their jetways for. As for DL, I think they'd get them because they are the biggest of the 3 legacy carriers in Boise. Moving them to A would free up more space for WN, UA, and maybe AA to grow.