Airline baggage weight limits vary by carrier and ticket type

Most airlines allow a checked bag to weigh between 40 and 70 pounds, with 50 pounds being the most common limit. Carry-on bags have a separate, lighter limit—usually 22 pounds—though some airlines measure by dimensions instead of weight. The exact limit depends on which airline you fly with and what class of ticket you bought. Budget carriers often charge extra fees if your bag exceeds their limit, while full-service airlines may include a higher allowance in premium tickets.

Weight limits exist because heavier bags cost more to load, handle, and transport. Airlines also use weight limits to balance aircraft safely. If your bag is over the limit, you will either pay a fee (typically $25 to $100 per bag) or be asked to remove items at the gate. Knowing your airline's specific limit before you pack saves time and money.

Key Takeaways

  • Most airlines allow checked bags up to 50 pounds and carry-on bags up to 22 pounds, but limits vary by carrier and ticket class.
  • Budget airlines often charge $25 to $100 per overweight bag, while full-service carriers may include higher limits in premium fares.
  • Some airlines measure carry-on bags by dimensions rather than weight, so a light bag that is too large can still be rejected.
  • Trains and buses typically have looser weight rules than airlines, though they may limit the number or total size of bags you can bring.
  • Weighing your luggage at home before travel prevents surprises at the airport or station.

Checked baggage weight limits by airline type

Full-service carriers like American, Delta, United, and Southwest typically allow one checked bag at 50 pounds at no extra charge for standard economy tickets. Premium economy or business class tickets often include two bags or higher weight allowances. These airlines build the cost of checked baggage into their ticket price.

Budget carriers like Spirit, Frontier, and Allegiant charge for checked bags separately and often set lower limits. Spirit allows one checked bag at 40 pounds for a fee; Frontier allows 40 pounds on most fares. If your bag weighs 41 to 70 pounds, you pay an overweight fee on top of the checked bag fee. Bags over 70 pounds are usually rejected entirely.

International carriers often use a two-bag system: each bag can weigh up to 50 pounds, or sometimes 70 pounds on long-haul flights. Check your specific airline's website before booking, because limits vary widely.

Carry-on bag weight and size rules

Carry-on bags must fit in the overhead bin or under the seat in front of you. Most airlines set a weight limit of 22 pounds, but some measure by dimensions instead—typically 22 by 14 by 9 inches. A bag that is light but oversized will be rejected even if it weighs less than 22 pounds. Budget airlines are stricter about this; full-service carriers often allow a bit of overage.

If your carry-on is rejected at the gate, the airline will check it for free, but you lose access to your belongings during the flight. Weighing your carry-on at home and measuring it against your airline's stated dimensions prevents this problem. Many airports have sizing frames at the gate where staff test whether your bag fits; if it does not, you will be asked to check it.

Train and bus baggage weight rules

Trains and buses have much looser weight rules than airlines because they do not face the same safety and fuel constraints. Amtrak allows passengers to bring two large bags and two small bags at no weight limit, as long as they fit in the overhead racks or under your seat. Regional trains vary; check your specific operator's policy.

Greyhound and other intercity buses typically allow two checked bags and one carry-on, again with no strict weight limit. The constraint is usually space, not weight. If the bus is full, you may be asked to check an extra bag. Local transit buses do not allow large luggage at all, only personal items.

What happens if your bag is overweight

At check-in, your bag will be weighed. If it exceeds the limit, you have three options: pay the overweight fee, remove items and repack, or check a second bag if your ticket allows it. Overweight fees range from $25 to $100 per bag depending on how much over the limit you are and which airline you use. Some airlines charge a flat fee for any overage; others charge by the pound.

If you discover your bag is overweight after you arrive at the airport, you can use a luggage storage service or mail items to your destination, though both cost money. The cheapest solution is to weigh your bag at home and repack before you leave.

How to weigh luggage before travel

A bathroom scale works if you do not have a luggage scale. Weigh yourself alone, then weigh yourself holding the bag, and subtract. This method is accurate to within a pound. A dedicated luggage scale costs $10 to $30 and is more precise; you can buy one at any travel goods store or online.

Weigh each bag separately and note the weight. If you are close to the limit, leave room for items you may pick up during your trip—souvenirs, gifts, or groceries. Airlines weigh bags again at the gate, so a bag that was 49 pounds at home may be 50 pounds by the time you check in if you added anything.

International flights and special baggage

International flights often allow higher weight limits than domestic flights. A transatlantic flight may allow 70 pounds per checked bag instead of 50. However, some airlines use a total weight allowance instead—for example, two bags totaling 110 pounds rather than 50 pounds each. Read your airline's baggage policy carefully, because the rules change by route.

Sports equipment, musical instruments, and mobility devices have separate rules. A golf bag, bicycle, or wheelchair may not count toward your baggage allowance, or may count as one bag regardless of weight. Some items require advance notice. Call your airline before you pack if you are traveling with anything unusual.

Frequently Asked Questions

Can I bring two carry-on bags?

Most airlines allow one carry-on bag plus one personal item (a purse, backpack, or laptop bag). The personal item must be small enough to fit under the seat. Some airlines are stricter and count both toward your carry-on limit. Check your airline's website or call before you travel if you are unsure.

What if I pack a heavy item in my carry-on instead of checking it?

Carry-on bags are still weighed and must meet the weight limit, usually 22 pounds. If your carry-on is overweight, staff may ask you to remove items or check the bag. There is no advantage to carrying a heavy bag instead of checking it.

Do I pay overweight fees on both checked bags?

Yes, if you have two checked bags and both are overweight, you pay the overweight fee for each one. Some airlines charge a lower fee for the second bag, but most charge the same rate. Budget airlines may charge a fee just for having a second bag, plus an overweight fee on top.

Are there weight limits on international trains?

Most international trains do not enforce strict weight limits. Eurostar and other European rail services allow two large bags per passenger with no weight restriction, as long as they fit in the luggage racks. Asian and Australian trains vary; check your specific operator's policy before you book.

What if my luggage is damaged and becomes heavier?

If your bag is damaged during travel and becomes heavier or larger, you are not charged an overweight fee on the return flight. Report the damage to the airline before you repack, and keep the damage report. The airline may repair the bag or issue you a replacement.