Typically in economy, you can bring one carry-on and one personal item. If you bring two bags, one must fit underneath your seat and the other can go into the overhead bin. If you're flying in an upgraded class like business or first, you may be allowed an additional carry-on bag.

You are generally allowed to take two suitcases on a plane, but the cost and classification depend entirely on your airline's baggage policy and your ticket class. In 2026, most major "full-service" carriers allow you to bring one carry-on bag (stowed in the overhead bin) and one personal item (stowed under the seat) for free. If by "two suitcases" you mean two large checked bags, you will almost certainly face additional fees unless you are flying in a premium cabin or have elite status. Low-cost carriers like Spirit or Ryanair often charge for every bag beyond a small personal item. For international long-haul flights, a standard "Main Cabin" fare usually includes one checked bag, with a second bag costing between $75 and $100. It is crucial to check the specific weight and size dimensions for each bag; typically, checked bags must not exceed 50 lbs (23 kg) and 62 linear inches. Taking two suitcases is always "allowed" as long as you are willing to pay the associated fees, which are significantly cheaper if prepaid online rather than at the airport counter.