You must prepay for your checked bags at least 24 hours before your flight to receive any discount. Prices are based on standard sized bags for one-way flights. Oversized and overweight bags, as well as special items, must be paid for at the airport.
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Airlines aren't only charging for checked bags; some also charge for carry-on baggage. Carry-on bag fees are usually limited to low-cost carriers, but you'll want to pay attention to your allowances before your next flight.
It's rare to find U.S. airlines with free checked baggage. Southwest Airlines is the only airline without any bag fees. For other airlines, you'll need to earn elite status or book your tickets with an airline credit card.
Far from being an act of generosity towards travelers, Delta is testing giving free checked bags in the hopes that it will help speed up the boarding process.
For most major U.S. airlines, fliers can expect to pay $30 to $35 each way to check a bag when flying economy class on a domestic route. Travelers can save money by earning elite status or getting a credit card with free baggage perks.
The only airline to not charge for checked baggage is Southwest Airlines. All other airlines charge fees to check luggage. Some airlines will permit 1 checked bag for free depending on the fare you purchase.
Southwest Checked Baggage AllowanceAll checked bags must adhere to a max weight of 50 pounds (23 kg) and must adhere to max linear dimensions of 62 inches (158 cm). Southwest is the only airline that provides 2 FREE CHECKED BAGS for all fares.
Firearms, ammunition, and fireworks are prohibited, as are all knives and safety razors (including pocket knives and Swiss Army knives). Straight razors and replacement blades for straight razors are also not allowed. Most tools also cannot be packed in carry-on luggage, as they have the potential to cause harm.
You can bring one carry-on bag and one personal item for free on most domestic and international flights. But there are a few rules you'll need to follow.
Gate agents often keep track of the number of passengers who board with carry-on bags that are too large to fit underneath their seats. Planes don't have enough overhead bin space to allow every passenger to bring a carry-on bag, so there has to be a cut-off at some point.
A crewmember will weigh and scan your bag, check your ID to ensure you are really you, and then you'll be on your way. Beginning May 7, 2025, you will need a state-issued REAL ID-compliant license or identification card, or another acceptable form of ID (such as a passport), to fly within the United States.
How much does it cost to gate-check a bag? Unlike bags you check ahead of a flight, an airline will check any otherwise allowed carry-on bag at the gate for free, regardless of your fare type.