Most airlines allow you to have one checked bag and one carry-on bag when flying (unless you pay extra for additional checked bags). It's a good idea to have a carry-on-sized suitcase since you aren't usually charged for these on a flight. The standard size for this is 22" x 14" x 9" , which includes handles and wheels. Checked bags cannot exceed 50 lbs and the most common maximum size is 62 linear (total) inches. Read the baggage policies for the airline you're flying on before you head to the airport!