Strange Passions: Ugandan Stamps
theoldie.co.uk
theoldie.co.uk
http://99percentinvisible.org/episode/episode-47-us-postal-s...
I found myself genuinely considering starting to collect them.
This got me thinking: How far can you send an envelope with just one (domestic) stamp? Well it turns out that you can mail a stamp to a military base (say, in Japan) or consulate for the same price as a domestic delivery. But this is routed through the military / consular mail systems and feels a bit like cheating :)
It turns out the tiny island of Palau has a US zip code (96940 - I believe it is now an independent nation? weird). So unless there is a zip code further east than Maine, I guess that's the longest distance you can send a letter entirely through the USPS with one domestic stamp. - about 8,500 miles.
Though, if there's a US station in Antarctica that has a zip code, I'd imagine you could do better by sending from Alaska?