CabinShade
Airplane seat letters: which letter is the window?
Short answer: A is the left window seat on almost every airline (left as you face the front). The right window is the last letter in the row: usually F on single-aisle planes like the Boeing 737 and Airbus A320, and usually K on wide-body planes. Always check the seat map when you book, because airlines letter their cabins differently.
How seat letters are assigned
Letters run from left to right across the cabin, starting with A at the left window. Airlines usually skip I (it looks like a 1), and some skip letters so the same letter always means the same position across their fleet. That's why a wide-body row can go A B C, D E F G, H J K.
Common layouts
| Layout | Typical aircraft | Typical letters | Right window |
|---|---|---|---|
| 2-2 | Regional jets (Embraer E175, CRJ) | A B · C D | D |
| 3-3 | Boeing 737, Airbus A320 family | A B C · D E F | F |
| 2-4-2 | Airbus A330 (economy) | A C · D E F G · H K | K |
| 3-3-3 | Boeing 787, Airbus A350 | A B C · D E F · G H J or K | J or K |
| 3-4-3 | Boeing 777 (10 across) | A B C · D E F G · H J K | K |
| 1-2-1 | Business-class suites | A · D G (or E F) · K (or L) | K or L |
These are the most common patterns, not rules. The airline's seat map is the only reliable source for your flight.
Window seats without windows
Some "window" seats sit next to a wall panel because the seat rows don't line up with the windows, and exit rows or bulkheads can leave a gap. If the view matters to you, look the row up on the seat map or in seat-review sites before you pick it.
Picking the right window for sun and shade
CabinShade shows its answer as A (left window) or F/K (right window, whatever letter your aircraft uses). Once you know the side, choose any window seat on it. Find the shady side with the calculator, or read which side of the plane gets the sun for the rules of thumb.