What is the farthest country you've ever sent a letter to ? Everyday life and customs

I am probably thinking distance because of the time it takes to deliver letters, sometimes it is just overwhelming !

Russia or USA.

USA

From Greece to Germany... And it took month till it arrived. I send a postcard home to my family but when it finally arrived I was long home and already forgot I even wrote one

USA

1 Dominican republic.... it takes a month
for a single letter
2 And Peru also ..... takes 3 weeks for a
single letter

USA

For now Indonesia

USA

Kanada

Iran