Stopovers between Denver and Athens
Denver to Athens is about 9,905 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.
Train from Schiphol to Centraal in 15 minutes, every few minutes.
Beer gardens, museums and easy Alpine day trips.
S-Bahn reaches the centre in 15 minutes; the Rhine valley is close.
Heathrow Express gets you to Paddington in 15 minutes.
US preclearance on the way home means you land in the US as a domestic arrival.
Easy airport train and a very walkable centre.
RER B from CDG reaches central Paris in about 35 minutes.
Turkish Airlines may give you a free hotel night if you connect here for 20+ hours.
Metro from the airport to the centre in 15 minutes; great for one night.