Size & Weight Limits for Carry-ons

Q. I haven't traveled in a while and will only be taking carry on luggage with me. Is there a weight and size limit? Also, I noticed that airlines now charge baggage fees. Does American charge a fee?

A. While there is no weight limit on carry on bags, all airlines have a size limit for bags taken into the cabin. In general, you're allowed to carry on one bag measuring no more than 22 inches long by 14 inches wide by 9 inches tall, plus one small "personal item" such as a pocketbook or laptop case. On American, that personal item must not exceed 36 inches in overall dimensions and should fit under the seat in front of you. American charges for checked bags; Southwest lets you check two bags for free as long as they don't weigh over 50 pounds; JetBlue gives you the first checked bag free; and only Spirit also charges for carry on bags unless they're small enough to fit under the seat in front of you.