I actually upgraded to first class on Horizon Air last spring when my work trip got extended last minute. What worked best for me was calling their support directly instead of trying to do it online. I dialed 877-764-3622 and got through to an agent in a couple of minutes. They walked me through the available seats, explained the price difference, and even helped apply one of my credits from a canceled flight. Super smooth compared to juggling the app. Pro tip: check availability online first so you know your options, then call and lock it in. That’s honestly the fastest way I’ve found to book, cancel, or tweak anything with Horizon.
