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Guide
Why checked bags have weight limits
Limits change; confirm with your airline before you fly. Every figure here links to the airline page it came from.
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Where does the 23 kg / 50 lb figure come from?
American Airlines, Delta, Southwest, Alaska, JetBlue, Spirit, Allegiant, Air Canada, WestJet, Lufthansa, KLM, Swiss, Virgin Atlantic and Singapore Airlines all publish 23 kg or 50 lb, or both, as the standard checked bag allowance in this guide's data. That is a wide spread of regions and business models landing on the same number. This file does not document a single shared origin for the figure, only that it functions as a de facto standard across nearly every airline covered here.
Which airlines publish a higher weight ceiling, and for whom?
American Airlines and Delta both allow 70 lb (32 kg) per bag in First and Business, compared with 50 lb (23 kg) in economy and premium economy fares. Qantas allows 70 lb (32 kg) per piece specifically on its economy fares to and from North and South America, higher than the 30 kg weight-concept allowance it uses on other routes and the 23 kg it uses on Australian domestic flights. WestJet's page notes that overweight bags up to 100 lb (45 kg) are accepted space-available, except on routes to and from Europe, where 32 kg (70 lb) is the maximum regardless of how much is paid.
| Airline | Standard checked weight | Higher ceiling or exception |
|---|---|---|
| American Airlines | 50 lb / 23 kg | 70 lb / 32 kg in First and Business |
| Delta | 50 lb / 23 kg | 70 lb / 32 kg in Delta One and Delta First |
| Qantas | 23 kg Australian domestic | 70 lb / 32 kg economy to and from the Americas; 30 kg weight concept elsewhere |
| WestJet | 50 lb / 23 kg | Up to 100 lb / 45 kg space-available, except 32 kg / 70 lb maximum on Europe routes |
| Turkish Airlines | 23 kg | No single piece over 32 kg under any fare |
| Emirates | 23 kg piece concept, Americas | No single bag over 32 kg under any weight-concept fare |
| Frontier | 40 lb | No kilogram figure published; lower than most other airlines here |
| Singapore Airlines | 23 kg per piece, two pieces on USA/Canada routes | No pound figure published |
Which airlines cap every single bag at 32 kg, no matter the fare?
Turkish Airlines states plainly that no single piece may exceed 32 kg under either its piece or weight concept, meaning that ceiling applies across every fare type, not just a premium one. Emirates publishes a similar hard line on routes that use a weight concept rather than a piece concept: individual fares can range from 20 to 35 kg by ticket type, but no single bag is allowed over 32 kg regardless.
Is any airline lower than the 23 kg / 50 lb standard?
Frontier publishes 40 lb as its standard checked bag allowance, ten pounds under the figure most other airlines in this guide's data use, and it does not publish a kilogram equivalent. Emirates' weight-concept fares, used outside the Americas piece-concept routes, can start as low as 20 kg for the lowest fare class, well under the more common 23 kg standard.
Do all these weight figures come with the same fee if a bag goes over?
No. Fee amounts for an overweight bag vary by airline and are not the same across this guide's data even where the weight limit itself is identical. This guide covers what the limits are; the separate guide to avoiding overweight bag fees covers the specific dollar figures Delta, Southwest, JetBlue and Frontier publish for going over.
How to know a bag is under the limit before reaching the airport
A hanging digital luggage scale, clipped to the handle before leaving home, gives a reading in seconds and costs less than most overweight fees on a single flight. Weighing a packed bag before the trip, rather than estimating, is the only reliable way to know it clears 23 kg (50 lb), or whatever figure the specific airline on the ticket publishes.
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Frequently asked questions
Is 23 kg (50 lb) really the standard almost everywhere?
Among the airlines in this guide's data, yes. American Airlines, Delta, Southwest, Alaska, JetBlue, Spirit, Allegiant, Air Canada, WestJet, Lufthansa, KLM, Swiss, Virgin Atlantic and Singapore Airlines all publish that figure, in pounds, kilograms or both, as the standard checked bag allowance, across US, Canadian, European and Asia-Pacific carriers alike.
Why is Frontier's checked bag limit only 40 lb instead of 50?
Frontier's own baggage page states 40 lb as its checked bag allowance, ten pounds under the figure most other airlines in this guide publish, and does not give a kilogram equivalent or an explanation for the lower number. Travelers used to the more common 50 lb standard should weigh a bag before flying Frontier specifically, since packing to the usual figure could put a bag over its limit.
What is the highest weight any airline in this guide allows for a single checked bag?
32 kg (70 lb) is the highest figure that appears, used by American Airlines and Delta for First and Business cabins and by Qantas for economy fares to and from the Americas. Turkish Airlines and Emirates both publish 32 kg as an absolute ceiling no bag may exceed, rather than as a premium-cabin allowance.
Does a heavier premium cabin allowance mean I can pack more on every fare?
No, only on the fare the higher figure applies to. American Airlines and Delta both publish the higher 70 lb (32 kg) figure specifically for First and Business, with standard economy and premium economy capped at 50 lb (23 kg) on the same airlines. Check which cabin the higher number applies to before assuming it covers the ticket being flown.
Researched, not professional advice. Airline rules change; confirm with your airline before you fly.