Stopovers between Denver and Rome
Denver to Rome is about 8,931 km. 12 cities sit close enough to the route to add a night or two, and Zurich, Reykjavík, Geneva have airline stopover programs. Pick your dates to see what each one really costs.
Cities on the way
Train from the airport to the old town in 12 minutes, so even a single night works.
Sits almost exactly on the great circle between North America and Europe, so the detour is tiny.
Compact lakeside city with free public transport for hotel guests.
RER B from CDG reaches central Paris in about 35 minutes.
US preclearance on the way home means you land in the US as a domestic arrival.
Heathrow Express gets you to Paddington in 15 minutes.
Iberia lets you stop 1–9 nights at no extra airfare.
Train from Schiphol to Centraal in 15 minutes, every few minutes.
S-Bahn reaches the centre in 15 minutes; the Rhine valley is close.
Beer gardens, museums and easy Alpine day trips.
The Blue Line runs from O'Hare to the Loop around the clock.
UP Express runs to Union Station in 25 minutes.