Originally Posted by sdsearch

Actually, there may several "micro" or otherwise smaller countries in Europe that technically fall under this, but in all cases they're not that from a major airport in an adjacent country where it's easy to fly into (perhaps even with carriers in more than one alliance).

I would say it's "unreachable on miles" if there's no practical way to get there with miles plus some reasonable ground transportation. A land country which is a few hours drive or train ride or boat ride from a major country, doesn't count.

I don't know, for example, if an alliance flies to each of the Baltic countries, but Estonia is just a 90ish minute boat ride from Helsinki, so I don't care if you can't fly directly into Estonia with miles, since it's so easy to fly into Helsinki with miles.

But, btw, a list defined even this way only helps if you have miles in all the major alliances, plus either Alaska or Icelandair (or is there another way to get reasonbly from the US to Iceland with miles?), or if you don't care how big a country is and how long it takes to go across it (if the alliance can only get you to the capital in one corner). On the latter point, and example is Norway: Any alliance can get you to Oslo, only two can get you to the southwest coast, and any further north (and it stretches far north!) and only Star Alliance can get you there.