Cuba is reachable using United miles on occasion.
Originally Posted by
kevincure
I'm recently back from a trip to East Timor, which cannot be reached using any major frequent flyer program; the only flights in are on Merpati, Batavia, Air Timor, Timorair and Airnorth, altogether landing from anywhere in the world roughly once a day. This made me curious: what other countries are unreachable using frequent flyer miles? I'll ignore temporary suspensions due to war such as in Libya, and focus only on the 193 UN member states. Let's divide them into groups:
Reachable with a major alliance but not with US miles for political reasons: Iran, Cuba, N. Korea
No major alliance but easy partner: Solomon Islands, Kiribati, Tuvalu (all on Air Pacific)
Microstate with no airport of its own: San Marino, Andorra, Liechtenstein, Monaco (all but Andorra have very close airports - as close as Narita or Arlanda to their related cities)
Probably reachable: Sao Tome, Lesotho, Swaziland (flights to these three are on subsidiaries of TAP and S. African which I believe can be used on United or Continental awards)
Unreachable on miles: Somalia (Kenya used to fly to Hargeisa but no longer), Nauru (tiny state), East Timor, Bhutan (Druk Air has state monopoly)
That is, as far as I can tell, you really can see the whole world using only miles!