Learn About Airline Baggage Policies and Fees

Understanding Baggage Allowances Across Major Airlines

Baggage policies vary significantly across airlines, and understanding what each carrier permits can help you pack more effectively and avoid unexpected fees. Most major U.S. airlines—including American, Delta, United, and Southwest—offer different baggage allowances depending on your ticket type and frequent flyer status.

Economy passengers on most carriers receive one free carry-on bag and one personal item, such as a purse, backpack, or laptop bag. This remains consistent across nearly all airlines. However, checked baggage allowances differ substantially. Some airlines permit one free checked bag for economy passengers, while others charge for the first checked bag. Southwest Airlines, for instance, allows two free checked bags for all passengers, which distinguishes it from competitors. Budget carriers like Spirit Airlines and Frontier Airlines typically charge for both carry-on bags and checked bags unless you purchase a higher ticket class.

The size and weight restrictions for carry-on bags generally follow a standard of 22 x 14 x 9 inches and must fit in the overhead bin. Checked bags typically have a 50-pound weight limit and 62-inch dimension limit (length plus width plus height). Exceeding these limits results in additional fees, often ranging from $35 to $150 per bag depending on how much overweight or oversized your luggage is.

Elite frequent flyer members often receive expanded baggage benefits. For example, United MileagePlus members at the Silver status level and above receive a free first checked bag, while Delta SkyMiles members at Silver Medallion status gain the same benefit. These tiers can provide significant savings if you travel frequently.

Practical takeaway: Before booking a flight, check the specific airline's baggage policy on their website. Write down the carry-on dimensions and checked bag limits so you can pack accordingly and avoid fees at the airport.

Checked Baggage Fees and How They're Calculated

Checked baggage fees have become a substantial revenue stream for airlines over the past 15 years. Understanding how these fees work helps you make informed decisions about your travel budget. Most airlines charge per bag, per trip segment, and the cost increases based on the bag's weight and dimensions.

For major carriers, a first checked bag typically costs $30 to $40 for domestic flights, though this fee is often waived for elite members or certain ticket classes. A second checked bag generally costs $45 to $50. Additional checked bags can cost $100 or more. These fees apply to each leg of your journey, meaning a round-trip flight involves two separate opportunities for baggage charges. International flights may have different policies, sometimes allowing two free checked bags in economy on long-haul routes.

Oversized or overweight bags incur additional surcharges. Most airlines define oversized as exceeding 62 inches in total dimension or weighing over 50 pounds. A bag that weighs 51-70 pounds typically costs an additional $50-$75, while bags over 70 pounds may be rejected entirely or charge $100-$200. Some airlines charge for oversized bags even if they meet the weight requirement, applying fees of $50-$100 per oversized bag.

Certain items have their own fee structures. Sporting equipment like golf clubs, skis, surfboards, and bicycles often require special handling fees ranging from $50 to $150 per item. Musical instruments may be treated as checked baggage or allowed in the cabin depending on size. Pet carriers also incur fees, typically $100-$200 per pet on most domestic flights.

Budget airlines operate on different models. Spirit Airlines charges $30 for a standard carry-on bag and $35-$45 for checked bags when purchased at the airport (prices are lower online). Frontier Airlines charges similar amounts. These airlines do not include baggage in their base fares, making their advertised prices artificially low.

Practical takeaway: Calculate baggage fees into your total flight cost, especially when comparing budget airlines to full-service carriers. Sometimes paying slightly more for a ticket on Southwest or another airline with free checked bags saves money overall.

Carry-On Baggage Rules and Restrictions

Carry-on baggage policies involve specific rules about size, number of items, and what contents are permitted. These rules exist partly for safety reasons and partly to manage cabin space. All U.S. airlines must comply with TSA regulations, though individual airline policies can be more restrictive.

The standard carry-on size limit across most major airlines is 22 x 14 x 9 inches, which accommodates most rolling suitcases and large backpacks. However, actual enforcement varies. Airlines often have sizers at gates and may require oversized bags to be checked. Spirit Airlines and Frontier Airlines have smaller limits—typically 21.75 x 13.75 x 8.75 inches—to reduce overhead bin space usage. These smaller dimensions can make a noticeable difference when packing.

Most airlines allow passengers to bring one carry-on bag plus one personal item. The personal item typically includes a purse, backpack, or small laptop bag and can be smaller than the carry-on dimensions. Some airlines are stricter about this rule than others. United, for instance, has been more strict about enforcing the one personal item rule on oversold flights. Southwest allows one carry-on bag and one personal item but doesn't charge for checked bags if your carry-on doesn't fit.

Restricted items cannot be carried on or checked on any airline. These include firearms, ammunition, explosives, certain tools, and flammable substances. Lithium batteries, particularly spare batteries, have strict regulations—passengers can carry two spare batteries in carry-on luggage but are prohibited from carrying spare lithium batteries in checked bags. Electronic devices with lithium batteries, such as laptops and phones, can go in either carry-on or checked bags.

Liquids and gels follow the TSA 3-1-1 rule: containers of 3.4 ounces or smaller, all fitting in one quart-size clear plastic bag, with one bag per passenger in carry-on luggage. This includes lotions, shampoos, conditioners, toothpaste, peanut butter, and yogurt. These items can exceed 3.4 ounces if placed in checked baggage.

Practical takeaway: Pack valuable electronics, medications, and important documents in your carry-on bag rather than checked baggage. Bring your carry-on to the gate and measure it against the airline's sizer if you're uncertain about size compliance.

Baggage Policies for Special Circumstances

Airlines maintain different baggage policies for passengers in premium cabins, families traveling with infants, and those with disabilities. Understanding these specialized rules prevents complications during your travels.

First-class and business-class passengers receive significantly enhanced baggage allowances. On most major airlines, business-class passengers traveling internationally can check 2-3 bags per person, with higher weight limits of 70 pounds or more per bag. First-class domestic passengers typically receive 2 free checked bags. Many airlines also waive fees for oversized or overweight baggage for premium cabin passengers, and some provide additional carry-on allowances or the ability to bring multiple personal items.

Infants and young children have specific baggage policies. Typically, a passenger traveling with an infant receives an additional baggage allowance for a car seat or stroller. Most airlines allow both a car seat and a stroller to be checked for free, or one item to be gate-checked. Some airlines allow compact strollers to be brought to the gate and stored in the jetway. These policies vary, so confirmation with the airline before traveling prevents gate-area confusion.

Passengers with disabilities and their service animals have protected baggage rights under the Air Carrier Access Act. Service animals travel free and don't count toward baggage allowances. Passengers with mobility disabilities may carry additional items such as walkers, wheelchairs, or canes without charge. These items are typically gate-checked to prevent damage. Emotional support animals have more limited rights; while they may travel with a passenger, they do not receive the same automatic fee waivers as trained service animals.

Military personnel, including active duty, reserve, and veterans with military ID, often receive baggage benefits on certain airlines. Some carriers waive fees for the first or second checked bag for military members. American Airlines and United both offer military personnel one free checked bag beyond their standard allowance.