Seat designation Aircraft seat map

right-hand 3 seats skip on letter

on many aircraft, rightmost seats have letter designations hjk, skipping letter i. because each seat has row number followed letter. letters confuse numbers must avoided. digital equipment corporation (dec) first implement this, avoiding (1), o (0) , s (5). remaining letters called dec alphabet.

occasionally, aircraft seating structure of 2+2 may letter seats acdf keep standard of a/f being window , c/d being aisle on short-haul aircraft (which have 3+3 seats).

in first , business class cabins, seat letters window seats typically same in coach, letters skipped in between there fewer seats per row. example, if economy cabin ten across, labeled abc-defg-hjk, business class cabin might labeled ac-dg-hk 6 across layout, a-dg-k 4 across first class. 1 notable exception delta air lines, uses sequential letters regardless of cabin layout on aircraft (ab-cd-ef in business class , abc-def-ghj in economy).

some airlines omit row number 13. example, lufthansa, (as shown e.g. on lufthansa a321/100 seating plan) reputedly because of widespread superstition number 13 unlucky. emirates used have row 13, on latest a380 aircraft have removed (as shown on emirates a380-800 seating plan). british airways less superstitious, , seat maps a320 aircraft shows row 13. delta air lines includes row 13 in many of seat maps.