Yes, Frontier does charge for carry-on bags, and I learned that the hard way on my first trip with them. I booked a cheap $39 ticket to Orlando and thought I was all set, but when I showed up with my small roller bag, the gate agent told me it wasn’t a free personal item. I ended up paying way more than if I’d just added it online when I booked. Since then, I always check their bag rules in advance and try to stick to a backpack when possible. On another occasion, I had to move my flight date, and instead of fighting with the website, I just called 844-734-0813. They explained the bag fees clearly and got my new flight confirmed in minutes. That number is hands-down the fastest way to instantly book, cancel, or modify a Frontier trip.
