Are seats always numbered using the same system?
 

Apologies if this has been asked before, I did a search but nothing turned up.

On every plane I've ever flown, the seats have been numbered the same way:

A-X beginning on the left (when facing forwards)
1-N front to back

Any variations out there?

Also - I've always boarded the plane from the left side (again facing forward). Have you ever boarded from the other side?

Some don't have a row 13, some do. Some a/c skip a letter across the row ie: AC DEF.

I've boarded from the left, right and rear.

I've never seen lettered rows and numbered seats. I've never seen high to low going front to back or the equivalent in seat-naming. But then, I've never flown Aer Elbonia so my experiences are far from comprehensive.

The consequences are frightening. Imagine snagging 2B and finding it in the back of the jet when you board!

It depends on whether
1. You are in the northern or the southern hemisphere.
2. Whther the sterring wheel is on the right or the left
and
3. Whether the plane is metric or American. ;)

We are in row 13 and 14 on both our TATL flights. IN some aircraft a rows go from 6 to 15 or 16 skipping numbers 7 thru 14, probably because some one decided to add FC as an after thought or wanted to keep an option of ripping out FC and converting the plane to all coach.

This seems to be fairly common - F ends at say 7 and Y begins at 12. If you sort of add things up its clear that the space filled by 1-7 in F would accommodate 1-11 if it was Y.

In sort of the same vein, I've been fooled once or twice when I thought I'd made a good move by snagging the first row of coach, only to discover that we'd be deplaning (love that word) from the rear instead of the front.