Before you check into your flight, you can buy an additional bag to put in the hold. This is a costly option that gets more expensive the closer to your date of departure and even costlier if added on at the airport.

Yes, you can almost always add an extra bag to your flight after you have made the initial booking. In 2026, the most cost-effective way to do this is through the airline’s website or mobile app under the "Manage My Booking" section. Airlines heavily incentivize passengers to pay for bags online in advance by offering rates that are often 30% to 50% cheaper than paying at the airport check-in desk. For example, a bag that costs $35 to add online might cost $60 or more if you wait until you arrive at the terminal. Some budget carriers also have a "per-kilogram" or "per-bag" limit, so if you already have one bag and need another, make sure you are adding a second piece rather than just increasing the weight allowance of the first. Once paid for, you will typically receive a digital receipt or an updated boarding pass reflecting your new baggage allowance.