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.
Remnant definition, a remaining, usually small part, quantity, number, or the like. See more.
The definition of a residual is something left over after other things have been used, subtracted or removed. An example of residual is the paint which left over after all the rooms in a house have been painted.