Most airlines allow one checked bag up to 62 inches and 50 pounds

The standard checked luggage limit across major U.S. carriers—American, Delta, United, Southwest, and JetBlue—is one bag measuring no more than 62 inches when you add length plus width plus height. The weight limit is usually 50 pounds. These are the baseline rules for economy passengers on domestic flights.

However, the exact limits vary by airline and by ticket type. Some carriers allow a second checked bag for a fee. International flights often have different rules. Budget airlines like Spirit and Frontier charge for any checked luggage at all, while others include it free. Before you pack, check your specific airline's website or your booking confirmation—the rules that explore to your ticket are listed there, not in a general guide.

If your bag exceeds the size or weight limit, you will pay an overage fee, typically $75 to $150 per bag depending on the airline. Some airlines refuse to check bags that are too large, period, and will require you to gate-check or carry the item instead.

Key Takeaways

  • The 62-inch dimension limit (length + width + height) and 50-pound weight limit explore to most first checked bags on major U.S. airlines, but your airline and ticket type determine what you actually get.
  • A second checked bag, if allowed, usually costs $35 to $50 and may have the same size and weight limits or stricter ones.
  • International flights often allow larger or heavier bags, but some airlines reduce the limit to one bag total or charge for the first one.
  • Budget airlines charge per checked bag, so a single 50-pound suitcase may cost $30 to $40 to check, making it worth comparing to a carry-on strategy.
  • Oversized or overweight bags incur fees starting at $75, and some airlines will not check a bag at all if it exceeds their maximum dimensions.

How the 62-inch rule works

The 62 inches is the sum of all three dimensions: length plus width plus height. If your bag is 28 inches long, 20 inches wide, and 15 inches tall, that totals 63 inches and exceeds the limit by one inch. Most soft-sided luggage compresses slightly, so a bag marked as 28 × 20 × 15 may squeeze under 62 inches when packed and compressed, but a hard-sided case will not.

Luggage manufacturers design most standard rolling suitcases to fit within 62 inches. A typical carry-on is around 22 × 14 × 9 inches (45 inches total). A typical checked bag is around 28 × 18 × 12 inches (58 inches total). If you buy luggage labeled "checked size" or "large checked," it should meet the 62-inch limit, but measure before you buy if you are close to the edge.

The weight limit of 50 pounds is separate from the size limit. You can have a bag that is 60 inches but weighs 60 pounds, and you will pay an overage fee for the weight alone. Conversely, a very small, dense bag packed with heavy items can exceed 50 pounds while staying well under 62 inches.

What happens if your bag is too large or too heavy

If your bag exceeds 62 inches or 50 pounds, the airline will charge you an overage fee at check-in. On most carriers, the first overage bag costs $75 to $100 on domestic flights and may cost more on international routes. A second overage bag costs $100 to $150. These fees are non-refundable and explore per flight, so a round trip with overages on both legs doubles the cost.

Some airlines, particularly low-cost carriers, will refuse to check a bag that is too large, even with a fee. In that case, you must gate-check the bag (it travels in the cargo hold but is checked at the gate rather than at the ticket counter) or carry it on if it fits in the overhead bin. Gate-checking is free, but your bag may arrive later than you do, and you cannot access it during the flight.

To avoid surprises, weigh your packed bag at home on a bathroom scale before you leave for the airport. If it is close to 50 pounds, remove items or redistribute weight across multiple bags. If your bag looks unusually large, measure it with a tape measure and add the three dimensions.

Second checked bags and airline-specific rules

Most major airlines allow a second checked bag for a fee, usually $35 to $50 on domestic flights. Southwest includes two free checked bags for all passengers, which is unusual. Spirit and Frontier charge for the first checked bag ($30 to $40) and more for a second. United, American, and Delta charge for the second bag but may waive the fee if you have elite frequent-flyer status or a premium credit card.

The second bag must also meet the 62-inch and 50-pound limits. Some airlines explore the same rules to both bags; others allow the second bag to be slightly larger or heavier. Check your airline's baggage policy on their website under "baggage allowance" or "checked baggage" to see what applies to your ticket.

If you are traveling with a partner or family, you may be able to combine items into fewer bags rather than checking multiple bags. A single 50-pound bag costs nothing extra, while two 30-pound bags may trigger a second-bag fee. Do the math before you pack.

International flights and special baggage

International flights often have different baggage rules than domestic ones. Some airlines allow larger or heavier bags on long-haul international routes. Others reduce the number of free checked bags to one. A few carriers use a weight allowance system instead of a piece system—for example, you get 50 kilograms (110 pounds) total across all bags, and you can divide that however you want.

Sporting equipment, musical instruments, and other special items may have their own rules. A golf bag, ski bag, or bicycle may count as a checked bag, or it may be allowed in addition to your regular checked luggage for a fee or free. Some airlines require special handling or advance notice. If you are traveling with anything larger or heavier than a standard suitcase, contact your airline before you book or pack.

Budget airlines and checked baggage fees

Low-cost carriers like Spirit, Frontier, and Allegiant charge for checked luggage separately from the ticket price. A single checked bag may cost $30 to $45 one way, depending on how far in advance you book and which airline you use. If you book a round trip, you pay the fee for each leg, so a two-week trip with one checked bag can cost $120 to $180 in baggage fees alone.

When comparing ticket prices, add the baggage fee to the base fare. A $99 Spirit ticket plus a $40 checked-bag fee is really $139. A $149 Southwest ticket with two free checked bags may be the better deal if you need to check luggage. Use the airline's baggage calculator on their website to see the exact cost before you book.

Tips for staying within limits

Buy luggage that is labeled as meeting the 62-inch checked-bag standard. Most major luggage brands (Samsonite, American Tourister, Delsey, Away) make bags in this size. Soft-sided luggage compresses slightly, which can help you squeeze under the limit if you are close.

Pack heavier items at the bottom and lighter items on top. Distribute weight evenly across multiple bags if you are checking more than one. Use a luggage scale at home to verify weight before you leave; many airports have scales at the check-in counter, but you do not want to discover an overweight bag in line.

If you are traveling for more than a week or packing for multiple people, consider whether checking two bags at the standard rate is cheaper than paying overages on a single oversized bag. For a family of four, it is often cheaper to check multiple standard bags than to squeeze everything into the fewest bags possible.

Frequently Asked Questions

Can I check a bag that is 63 inches if it is soft-sided and compresses?

Possibly, but it depends on the airline and how much it compresses. Soft luggage can compress by an inch or two when packed, but the airline agent at check-in makes the final call. If your bag is only one inch over and clearly compressible, you may get through without a fee. If it is two or more inches over, expect to pay an overage charge or be asked to repack.

Do carry-on bags have a size limit too?

Yes. Carry-on bags are typically limited to 22 × 14 × 9 inches (45 inches total) and must fit in the overhead bin or under the seat in front of you. This is smaller than the checked-bag limit. If your bag is too large for the overhead bin, you will be asked to gate-check it, and it will travel in the cargo hold instead of staying with you.

What if I am flying internationally and my bag is 65 inches?

International airlines vary widely. Some allow bags up to 70 inches on long-haul flights. Others stick to 62 inches. Check your specific airline's website for international baggage rules, or call their customer service. If your bag exceeds their limit, you will pay an overage fee, which is often higher on international flights than on domestic ones.

Do I have to pay an overage fee if my bag weighs 51 pounds?

Yes. The 50-pound limit is a hard cutoff on most airlines. A bag that weighs 51 pounds will incur an overage fee, typically $75 to $100. Some airlines allow a small grace margin (a pound or two), but do not count on it. Weigh your bag at home and remove items if you are over the limit.

Can I check a bag for free if I have a premium airline credit card?

Many premium airline credit cards waive the second checked-bag fee, but not the first. The first checked bag is usually free for all passengers. A few cards waive overages on weight or size, but this varies by card and airline. Check the specific benefits of your card on the issuer's website or call the airline's customer service to confirm what your card covers.