A: I don't know how much luggage I can take on the plane with me.
B: You need to look up each individual airline online to get their restrictions.
A: I just wonder what the general rules are.
B: In the United States, if you fly economy on a domestic flight, you usually have to pay for checked baggage.
A: What about international flights?
B: On international flights, you usually have a two-bag limit with weight restrictions.
A: What about carry-on bags?
B: All airlines will allow you to bring one small carry-on that will fit under the seat. Sometimes you can also bring a purse or handbag.
A: Do you have any words of wisdom for travelers in regard to luggage?
B: Keep it light in regard to what you pack. Figure out what you absolutely need and leave the rest at home.