Checked Baggage on International Flights: The Allowance Is a Grid, Not a Number

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The verdict

1. On most international tickets the checked allowance is not a number you can look up — it is a grid, and on some carriers it is a calculator. Qantas states outright that "Your allowance is based on size and weight, or by number of pieces and weight, depending on where you’re flying to"; Air Canada warns that "Your final baggage allowance may differ as it is based on the date your ticket is issued." When the ticket decides and the ceiling is hard, the one figure you can fix in advance is what it costs to send the bag separately, so price door-to-door luggage shipping — it publishes delivery to "more than 200 destinations worldwide" — against the carrier's excess charge.
2. The size ceiling is the same everywhere and the weight ceiling is not. Qantas and Air Canada both land on 158cm/62in for a single piece, but Qantas' Australian domestic limit is 140cm (55in) — a carrier whose own short-haul box is smaller than its long-haul one.
3. Empty weight is the only part of the allowance you control at the shop. Against a fixed per-piece ceiling, every pound of shell is a pound of clothes, and the spread between two checked cases of the same nominal size from the same maker can be close to three pounds.

What actually changes when the flight leaves the country

Three things, and only one of them is the exchange rate on the numbers.

The unit changes. Air Canada's checked page lists the per-bag weight as "23 kg/50 lb" and the size as "D + W + H: 158 cm/62 in," under a heading that specifies "greatest outside height, width and length – wheels and handles included". Qantas publishes the same size ceiling in prose: "The total dimensions for each piece can’t be more than 158cm (62in)."

The presentation changes. Air Canada and Qantas both publish the per-piece ceilings as labelled rows, but neither publishes your allowance as a sentence. Qantas' table is a grid of bare cells — "Up to 23kg (50lb)", "Up to 32kg (70lb)", "Up to 40kg (88lb)" — whose meaning comes from the row and column headings around them, not from any string you can quote. There is no contiguous line on the page that says what a given ticket allows. Air Canada is more explicit about it: the number of bags is returned by a calculator that wants a route, a fare class and a loyalty tier, and it attaches the caveat that the answer may change with the ticketing date.

The single-piece ceiling appears. Qantas states it plainly — "ensure no single piece exceeds 32kg (70lb)" — and repeats it under every higher weight band. Air Canada sets the same threshold, above which the bag stops being baggage: at "32 kg (70 lb)" or "292 cm (115 in) in total linear dimensions" you are referred to cargo. This is the cap that actually ends the conversation, and it is one of the few international figures that does not move with the fare.

The ceiling that is smaller at home than abroad

Qantas is worth reading closely because it publishes two size rules and the smaller one is the domestic one. Its international rule is "The total dimensions for each piece can’t be more than 158cm (62in)." Its Australian domestic rule is "The total dimensions for each piece can’t be more than 140cm (55in)," with a worked example: "For example, 56cm height + 34cm width + 23cm depth = 113cm maximum size. This is under the 140cm limit."

That inverts the assumption most travellers carry — that the long-haul leg is the strict one. It also matters practically, because the domestic Australian segment that connects you to the international flight is frequently on the same booking. The strictest leg is the one to buy for, and it is not reliably the longest. The method for adding the three sides is the same everywhere, and Qantas spells it out: "To calculate the size of your luggage, add together the width, height and depth of the piece." The full rule and what it costs when you miss it is in the sixty-two-linear-inch explainer, and the cabin side — which is a genuinely different and often tighter problem on non-US carriers — is in carry-on weight limits on international airlines and how to choose a carry-on that fits 55cm limits.

US carriers are the outlier, not the baseline

For comparison, read in September 2026: Southwest publishes "62 inches in size (length + width + height)" with "Wheels and handles should be included when measuring" and bags "Up to 50 pounds each". Frontier publishes the same ceiling — "Must not exceed 62 linear inches (length plus width plus depth, including handles, wheels, and straps)" — but a lower weight: "May weigh up to 40 pounds," with overweight starting at "$75 per bag, per direction" for 41-50 pounds and reaching "$129 per bag" for heavier bookings made on or after April 4, 2026.

So a bag packed to a US domestic carrier's 50-pound band is already inside the 23 kg international ceiling, and a bag packed to Frontier's 40 pounds is comfortably inside it. The direction of travel that catches people is the other one — a case sized and packed against a generous 32 kg premium allowance will fail an economy ticket on the same airline.

Empty weight is the only variable you buy

Against a fixed per-piece ceiling, the suitcase's own weight comes straight out of your allowance, and makers who publish the figure make the trade legible.

Travelpro states it as arithmetic on the product page. On the medium check-in: "This bag weighs 6.8 lbs empty, which leaves about 43.2 lbs of packing before standard overweight fees." On the large check-in: "This bag weighs 8 lbs empty, which leaves about 42 lbs of packing before standard overweight fees." The same pages publish two sets of dimensions — case "25 x 18 x 11 in" against overall "27 x 18.5 x 11.5 in" on the medium — and the reason that gap matters against a 158cm ceiling is worked through in listed against exterior checked-bag dimensions.

Hard shells vary more than most buyers expect, and the variance is within brands as well as between them. LEVEL8 publishes its Luminous Textured checked 24-inch at "17.5'' L x 10.4'' W x 26" H | 9.8lbs | 65 L" and its Hegent checked 24-inch at "17.7''L x 10.6 ''W x 26''H (45 x 27 x 66 cm)" with "Weight: 12.6lbs (5.7kg)" and "Capacity: 68L". Two 24-inch checked cases from one maker, near-identical on the outside, published at 9.8lbs and 12.6lbs empty — and against a fixed per-piece ceiling, that gap is clothes. If a light hard shell is what the itinerary needs, LEVEL8's published checked dimensions and empty weights are stated per model rather than per line. The choice between the two checked sizes is in twenty-five inches against the bigger class, and the budget field in our under-two-hundred checked round-up. Check the box itself with our airline sizer tool before you commit.

When to stop packing and start shipping

The shipping comparison is cleaner internationally than domestically, because the airline's excess-baggage charge on a long-haul ticket is rarely a flat number and the shipper's is a quote. Luggage Forward publishes pricing that "starts at $99/bag," delivery to "more than 200 destinations worldwide," and an undertaking that a shipment is "guaranteed to arrive on time or we’ll refund you double what you paid to ship the bag."

That is worth running when the itinerary has a hard 23 kg ceiling and a bag you cannot get under it, or when a domestic connection caps a piece at 140cm. Neither side of the comparison is a published constant, so the only honest instruction is to price your own route on both. The weight-band mechanics are in how the overweight fees actually work.

What we could not verify

ba.com served a high-demand holding page rather than its baggage tables to our requests, and aa.com returned an access-denied page, so neither British Airways nor American is quoted here. Emirates timed out. The international figures above rest on Qantas and Air Canada, with Southwest and Frontier as the US comparison.

No carrier we read publishes a single static economy allowance. Where this article states a weight, it is a per-piece ceiling, not a statement of how many pieces a given ticket includes — that number comes from the fare, and on Air Canada from a calculator.

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FAQ

What is the checked baggage weight limit for international flights?

There is no single figure. Air Canada publishes a per-bag maximum of 23 kg or 50 lb, and Qantas publishes weight bands running from 23kg up through 32kg and beyond depending on cabin and route, with a hard rule that no single piece may exceed 32kg or 70lb. The number of bags your ticket includes is separate and set by the fare.

How many linear inches is a checked bag allowed on an international flight?

Both Air Canada and Qantas publish 158cm, which is 62 inches, as the total of height plus width plus depth for a single piece. Air Canada specifies that the measurement is the greatest outside dimension with wheels and handles included. Qantas publishes a smaller ceiling of 140cm for Australian domestic flights.

Why is my airline's baggage allowance different from the one on its website?

Because on several carriers the published page gives only the per-piece ceilings, and the allowance itself is generated per ticket. Air Canada states directly that a final allowance may differ because it is based on the date the ticket was issued. Check the fare rules on your own booking rather than the general page.

Is it worth shipping luggage internationally instead of checking it?

It is worth pricing whenever a bag will not get under a fixed per-piece ceiling, or when a connecting domestic segment enforces a smaller limit than the long-haul flight. Luggage Forward publishes a starting price of ninety-nine dollars a bag and delivery to more than two hundred destinations. Compare that to your carrier's own excess charge for your specific route.