Flying from Britain, either/or. I do my transatlantic flying on Delta, mostly LGW-ATL which is 4223 miles. For silver, it takes 25k or 5 Transatlantic segments (21115 miles) and I usually fly a short US domestic leg associated with each TA. For gold, it is 50k or 10 Transoceanic segments. Average per DL segment is therefore about 2500. When you throw in a fair number of short haul European flights (often) on BA because my boss prefers it, I average about 1500 miles per flight.
[This message has been edited by james (edited 10-16-1999).]