Why is there "less" space for carry-on luggage on low-cost flights?

Souleymane Enok

February 27, 2026

If you have ever traveled with a low-cost airline, you have probably noticed that the overhead compartments fill up very quickly. The impression that there is "less" space for carry-on luggage is not an illusion: it is explained by several structural and economic factors.

The first reason is simple: more passengers on the same plane. Low-cost airlines maximize profitability by increasing seat density. They add more rows in standard single-aisle aircraft. The result: there are more travelers, but the capacity of the luggage bins remains the same. Mathematically, the space available per passenger decreases.

The second key element is the business model based on paid options. Low-cost airlines often charge for a standard cabin suitcase. Only a small bag is included for free. This strategy aims to limit the volume of luggage in the cabin, but in practice, many passengers try to optimize their allowed luggage, which quickly overloads the compartments.

It must also be understood that overhead bins have a fixed capacity, determined by the aircraft's design. Even if the plane carries more passengers, there is no more physical space for carry-on suitcases.

Finally, low-cost flights are often full. A high load factor means that almost every seat is occupied. When all passengers board with carry-on luggage, the compartments quickly reach their limit.

In short, there is "less" space for carry-on luggage on low-cost flights because the number of passengers increases, while the available space remains the same. This is a direct consequence of the business model and the maximum optimization of the cabin.

How do low-cost airlines optimize cabin space?

Low-cost airlines rely on a simple principle: maximize the profitability of each flight. To achieve this, they optimize every square centimeter of the plane, especially the cabin space. This strategy largely explains why luggage compartments seem more restricted than on traditional airlines.

The first optimization concerns seat density. Low-cost airlines generally install more seats in the same aircraft than conventional airlines. Concretely, this means more passengers per flight... but no more room in the overhead luggage bins. However, each passenger often wishes to bring a cabin bag. The result: demand quickly exceeds the actual capacity of the compartments.

Next, low-cost airlines favor the business model of additional services. The cabin bag is no longer always included in the base ticket. Some airlines only allow one small free bag, while the standard cabin suitcase becomes a paid option. This policy helps limit the number of bulky bags in the cabin and encourages passengers to pay a supplement.

Another key factor is the standardization of aircraft. Low-cost airlines often use a limited number of aircraft models (such as high-capacity single-aisle jets). This homogeneity reduces maintenance and training costs, but it does not change the physical size of the overhead compartments. These have a fixed capacity, which does not adapt to the growing number of passengers.

Cabin space is also optimized to speed up turnarounds. Low-cost flights operate on a fast schedule: the goal is to minimize time on the ground between two trips. The faster passengers board, the sooner the plane can depart again. By limiting bulky carry-on luggage, airlines streamline boarding and reduce delays related to stowing suitcases.

Furthermore, the interior design is intended to maximize passenger space rather than luggage space. Seats are often thinner and closer together to add extra rows. This improves profitability per flight, but does not allow for a proportional increase in luggage compartments.

One must also consider the changing habits of travelers. More and more passengers wish to avoid hold baggage fees and travel only with carry-on luggage. This trend creates additional pressure on the overhead bins, especially on full flights.

Finally, airlines implement stricter controls at the boarding gate. When the compartments are full, some carry-on bags are placed in the hold for free or with an extra charge depending on the ticket. This helps ensure safety and compliance with cabin weight standards.

In summary, low-cost airlines optimize cabin space by increasing seat density, monetizing luggage, and accelerating turnarounds. The number of passengers increases, but the capacity of the compartments remains limited. This combination explains why there seems to be "less" room for carry-on luggage on low-cost flights.

How to avoid extra luggage fees on low-cost flights?

Traveling on a low-cost flight allows you to reduce the price of the ticket, but baggage fees can quickly drive up the bill. Fortunately, there are several simple strategies to avoid extra costs.

The first rule is to precisely check the airline's baggage policy before booking. Each carrier applies specific dimensions and conditions. Some airlines only include a small bag (about 40 x 30 x 20 cm), while a standard carry-on suitcase is a paid extra. Knowing these limits allows you to adapt your choice of luggage.

Next, choose a bag that perfectly complies with the allowed dimensions. Investing in a low-cost compatible cabin bag can avoid sometimes high fees at the boarding gate. Be careful: it is the dimensions once the bag is filled that count, not those indicated on the label.

Also consider traveling light. Optimizing your luggage reduces the risk of it exceeding the allowed weight or volume. Opt for versatile clothing and wear the bulkiest items (jacket, heavy shoes) during the flight.

If you know in advance that you will need a larger cabin bag, it is often more economical to pay for the luggage option at the time of booking rather than at the airport. Fees are generally higher at the counter or at the boarding gate.

Finally, arrive early for boarding. Passengers boarding last are more likely to have their luggage placed in the hold if the overhead compartments are full.

In summary, to avoid extra luggage fees on low-cost flights, you must anticipate, strictly respect the allowed dimensions, and optimize your organization. Simple preparation allows you to save money and travel with peace of mind.