What airlines allow on international flights

Most international airlines allow one carry-on bag and one personal item (like a purse or laptop bag) at no extra charge, plus one checked bag included in your ticket price. A second checked bag usually costs $50 to $200 depending on the airline and destination. Some airlines, particularly budget carriers flying to Europe or Asia, charge for the first checked bag itself—sometimes $30 to $50—so what you pay depends entirely on which airline you booked and what class of ticket you bought.

The catch is that "one carry-on" does not mean one piece of luggage. Airlines define carry-on as a bag that fits in the overhead bin, and a personal item as something smaller that fits under the seat in front of you. A rolling suitcase counts as carry-on; a backpack, purse, or small rolling bag counts as personal item. You are allowed both, so you can bring two bags into the cabin without paying extra.

Weight limits for checked bags are usually 50 pounds (23 kilograms) per bag on most carriers. Exceeding that limit costs $100 to $200 per bag, sometimes more. Carry-on bags have no weight limit on most airlines, only size limits—typically 22 by 14 by 9 inches (56 by 36 by 23 centimeters), though this varies by airline.

Key Takeaways

  • You can bring one carry-on bag and one personal item into the cabin on most international flights at no extra cost, regardless of airline.
  • One checked bag is usually included in your ticket price; a second checked bag costs $50 to $200, and some budget airlines charge for the first one.
  • Checked bags must not exceed 50 pounds each; overweight fees start around $100 per bag.
  • Carry-on bags have size limits (typically 22 by 14 by 9 inches) but no weight limit, and must fit in the overhead bin or under the seat.
  • Budget airlines, regional carriers, and basic economy tickets often have stricter limits or charge for bags that full-price tickets include.

How to find your airline's specific rules

Your airline's baggage policy is printed on your booking confirmation email and on their website under "Baggage" or "Checked Baggage." Do not assume all airlines are the same. Southwest allows two free checked bags on all tickets. United, American, and Delta include one free checked bag on most international tickets, but not on basic economy fares. Budget carriers like Frontier, Spirit, and Ryanair charge for checked bags on nearly all tickets.

If you booked through a travel website like Kayak or Expedia rather than directly with the airline, log into the airline's website with your confirmation number and check their baggage page. The travel website may not show the full policy, and you need the airline's own rules, not a summary. Many airlines also let you add a second checked bag or pay for overweight bags when you check in online, 24 hours before departure.

Size and weight limits that matter

Checked bags have two limits: weight and dimensions. Weight is straightforward—50 pounds is the standard on most carriers, though some airlines allow 70 pounds on certain routes. Dimensions matter because some airlines charge if your bag is longer than 62 inches (length plus width plus height combined). A standard rolling suitcase fits both limits, but if you are packing a large duffel or an oversized hard case, measure it before you go to the airport.

Carry-on bags are measured, not weighed. The size limit is usually 22 by 14 by 9 inches, but some airlines (particularly international carriers like Lufthansa and Air France) allow slightly larger bags—up to 24 by 16 by 10 inches. If your bag is borderline, pack it light anyway; gate agents sometimes ask you to remove items if a bag looks too full to fit in the bin. Personal items have no official size limit on most airlines, only the understanding that they fit under the seat.

What happens if your bag is overweight or oversized

If your checked bag exceeds the weight limit, you will be charged at the counter. The fee is usually $100 for the first 10 pounds over, then $200 for each additional 10 pounds, though this varies by airline. You cannot always pay to fix it on the spot—some airlines require you to remove items and repack, or they will not take the bag at all. Arriving early gives you time to do this without missing your flight.

Oversized bags (those exceeding 62 inches in total dimensions) are treated the same way. If your bag is close to the limit, ask the agent to measure it before you pay a fee. Some agents are flexible if you are only an inch or two over; others enforce the rule strictly. The safest approach is to weigh and measure your packed bag at home before you leave for the airport.

International flights to specific regions

Most international flights from the United States follow the same rules—one free checked bag, one carry-on, one personal item. However, some routes have exceptions. Flights to the Caribbean, Mexico, and Central America on US carriers usually include one free checked bag. Flights to Europe on budget carriers like Norwegian or Wizz Air often charge for the first checked bag. Flights to Asia on carriers like ANA, Singapore Airlines, or Cathay Pacific may allow two free checked bags on premium economy or business class, but economy gets one.

If you are flying on a non-US airline, check their website directly. European carriers, Middle Eastern carriers, and Asian carriers often have different policies than US airlines. Some allow two free checked bags on all tickets; others charge by weight rather than by number of bags. The policy is always on their website under baggage or checked baggage.

Connecting flights and baggage

If your international flight includes a connection, your checked bag is usually tagged to your final destination and does not need to be reclaimed at the connection point. However, the baggage allowance is set by the airline operating the first flight, not the connecting airline. If you are flying United to London and then British Airways to Rome, United's baggage policy applies to the whole trip, not British Airways'.

If you booked two separate tickets (one to London, one from London to Rome), you are responsible for reclaiming your bag in London and checking it again for the second flight. This is risky because if your first flight is late, you may miss your connection and your bag may not make it. Whenever possible, book through-tickets on international connections so your bag is checked all the way through.

Special items and restrictions

Some items count toward your baggage allowance and some do not. A laptop, camera, or small personal device usually does not count as a personal item—you can bring those in addition to your purse or backpack. Sports equipment like skis, golf clubs, or a bicycle may count as a checked bag or may be charged as oversized baggage. Musical instruments in hard cases are usually charged as checked bags. Strollers and car seats for infants are typically free on international flights and do not count toward your baggage allowance.

Hazardous materials—including lithium batteries, certain electronics, flammable items, and some medical equipment—have their own rules and may not be allowed in checked baggage at all. If you are traveling with something unusual, contact the airline before you book or at least 48 hours before departure. Do not assume it is allowed and show up at the airport to be told you cannot bring it.

Frequently Asked Questions

Can I bring two carry-on bags instead of one carry-on and one personal item?

No. Airlines define carry-on as one bag that fits in the overhead bin, and personal item as one bag that fits under the seat. You get both, but not two overhead bags. If you try to bring two rolling suitcases, the gate agent will ask you to check one or remove items from one.

What if I pack my carry-on so full it does not fit in the bin?

The gate agent can ask you to check it at the gate, and you will have no recourse. Pack your carry-on so it closes easily and fits when you lift it into the bin. If it is borderline, leave room for compression.

Do I have to pay for a second checked bag if I am flying business or first class?

Usually not. Premium cabin tickets on most airlines include two or three free checked bags. Check your booking confirmation or the airline's website to confirm what your specific ticket includes.

Can I add a checked bag after I book my flight?

Yes. Most airlines let you purchase an extra checked bag online up to 24 hours before departure, or at the airport. The cost is usually $50 to $100 for the second bag, depending on the airline and destination.

What if my international flight has a layover in the US?

Your baggage allowance is set by the airline operating the first flight, even if you land in the US in the middle. However, if you are connecting to a different airline, the baggage policy of the airline operating the first leg applies to the entire journey only if you booked one ticket. If you booked separate tickets, each airline's policy applies to its own flight.