Traveling by plane can be very tiring. Therefore, it is important to take care of additional comfort and choose the right seat in the cabin. Find out more about the seating assignment by letter

When traveling by air, a seat is identified by a combination of a number and a letter. The number indicates the row number where the seat is located, and the letter identifies the specific seat in that row. The letters on the seats help to avoid confusion and make it easy to find your seat. 

This alphanumeric system simplifies the boarding process, making it more organized and understandable for passengers. Thanks to this system, you can quickly find your seat, making your trip more comfortable from the start.

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The order of letters in an airplane seat

The number of letters in each row depends on the width of the airplane. The farthest left seat is usually indicated by the letter “A”, and each subsequent seat is indicated by the next letter of the alphabet.

Narrow airplanes with two rows of seats can only have the letters “A” and “B”, while wide airplanes for intercontinental flights have seats designated by the letters “A” through “K”. Letters “I”, “S” and “O” are usually omitted to avoid confusion with numbers, as they look similar. This system helps passengers easily navigate and find their seats.

In most commercial airplanes, seats are arranged in rows, each of which is designated by a number, and the seats in each row are designated by letters. The letters usually go in order from left to right when looking in the direction of flight.

- Letter A: Always indicates a window seat on the left side of the aircraft;

- Letter B: The seat is located between A (window seat) and C (aisle seat) in a three-row configuration;

- Letter C: an aisle seat on the left side of the aircraft.

If there are four seats in a row, then the letters D, E, and so on. For example, in large airplanes, such as the Boeing 777 or Airbus A380, the seat configuration may look like 3-4-3 or 2-4-2.

- Letter D: an aisle seat with four seats in the center;

- Letter E and F: middle seats in the center seat block;

- Letter G: aisle seat on the right in the center block.

Does the letter assignment depend on the aircraft model?

Seat assignment by letter may vary depending on the aircraft model. In wide-body aircraft that have several seat blocks (left block, center block, and right block), each block has its own sequence of letters. For example, in a 2-4-2 configuration, the seats may be labeled A-B, D-E-F-G, H-K, where the letter A is the window seat on the left side and the letter K is the window seat on the right side.

Understanding how seats are assigned by letter will help you choose the most comfortable seat during the flight. If you like to look out the window, look for seats with the letters A or K. If you prefer to sit near the aisle, choose seats with the letters C, D, G or H.

Remember that the cabin configuration may vary depending on the airline. Therefore, it is always a good idea to check the cabin layout before booking to choose the best seat for your trip.

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We remind you! AirlineRatings has released the long-awaited list of the best airlines in the world. The leaders were distinguished by the perfect level of passenger comfort, service and innovation. We have already told you which airlines received the status of the best air carriers in 2025.

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