Originally Posted by
krazykanuck
It's an example of a very small piece of air travel. Even if you assume nobody drives to the port, a casual glance at TSA passenger
stats YTD 2023 (and 2019 for that matter) seem to hover around 2 million +/- a couple hundred thousand pax per day. Cruise bound pax are a rounding error to overall air travel - using your numbers vs TSA pax.
I'll add here that cruise pax don't exist in a vacuum. Many who would have gone cruising did other types of vacation travel.