I just went through this a couple weeks ago! I booked my Horizon Air ticket online first because it was quick, but later I needed to change the flight time. The website was fine for basic booking, but when it came to modifying my reservation, I found it way easier to just call. I reached them at 877-764-3622 and honestly, it saved me a headache — the agent walked me through the change in minutes. They also mentioned I could cancel the same way if needed. So yes, you can reserve online, but if you ever need to instantly book, cancel, or tweak your trip, that number is the best shortcut.
