TransMongolian train and global explorer
 

is the trans-mongolian train allowed with the Global Explorer ticket?
The train starts in Europe (Moskou) but ends in Beijing (Asia)....

as a matter of fact: we plan to travel by land from Moskou (Russia) till Delhi (India) :-)

Welcome to FT, and yes. You will be charged the mileage between Moscow and wherever your next flight departs.

We are (re)planning our trip around the world and now want to take the train from moskow till beijing and take a flight to Tokyo.

One world says:
If you choose to travel by surface transport, the most direct flown distance between the origin and destination point of the surface sector will be counted towards your total flown mileage.

Option 1:
A direct flight from Moskow to Beijing is not possible, there is a indirect flight via Helsinki and that is in total 4,467 miles. From Beijing to Tokyo is 1,328 (direct flight). This means 5,795 miles

Option 2:
buy a one way ticket to Tokyo ourselves and have a over land trip in our RTW ticket from Moskow to Tokyo. This is 4,675 miles.

It seams that option 1 is the better than option 2 (if you stay in the same Tier). But is my theory about option 1 correct??

And one more question: we want to travel by land from Xian (SIA) to Delhi (DEL). The one world online timetable states that there are no flights. How do they calculate the miles??

If I understand your question correctly the answer is that the distance is simply calculated between the open jaw points, without regard to actual (real) flight routes; it makes no difference if there is a direct flight or not.

The distance between Moscow and Beijing is approximately 3,604 miles or 6,006 KM. That is the amount that will be counted for the open segment.

Are you sure? I've seen reference to IATA distances that include shortest transit routing (within the alliance) if no non-stop exists. Perhaps I am remembering something from *A rather than OW?

That is what I took this sentence from the rules pdf to mean:

Note there is no mention of actual flights.

However, the oneworld page says this:

Which could, I guess, be interpreted either way. What do they mean by "flown" distance? Flown by a bird or flown by real scheduled metal?

Are you saying that the distance, for example, EZE//JNB would be counted via LHR?

And what happens with flights that come and go? Does the distance vary according to their schedule?

Edited to add: And this is what QF has to say (again unqualified distance):

And one last edit:

source: http://wikitravel.org/en/Round_the_world_flights

I yet haven't figured out how to find out via search, and it wasn't recent enough for me to be sure of the interpretation. Sorry.

Edit: I found this thread in the *A forum.