Route notes
Why this routing works
This itinerary uses an open-jaw structure to keep the routing efficient: fly from San Francisco to Vienna, make your own overland transfer to Milan, continue within Italy to Rome, then return nonstop in sequence back to San Francisco. That setup reduces backtracking and lets the ticket follow the actual direction of travel.
With 3 weeks total and 7 nights in Vienna, the pacing leaves room to split the remaining time across the Italy portion before the return from Rome. The overland break between Vienna and Milan is the key planning feature here, since that segment is not flown on the ticket and should be timed separately from the air sectors.
In business class, this route fits travelers who want a straightforward transatlantic multi-stop ticket without adding extra flight segments. October departure timing places the trip in the October-December season, and the sold fare range for this routing was USD 6,345 to USD 9,679.