Stopovers between Denver and Doha
Denver to Doha is about 12,367 km. 12 cities sit close enough to the route to add a night or two, and Helsinki, Reykjavík, Istanbul have airline stopover programs. Pick your dates to see what each one really costs.
Cities on the way
Finnair's hub and a natural break between Europe and Asia.
Sits almost exactly on the great circle between North America and Europe, so the detour is tiny.
Turkish Airlines may give you a free hotel night if you connect here for 20+ hours.
Train from the airport to the old town in 12 minutes, so even a single night works.
Good-value city with LOT's free stopover program.
A 24-hour city with a metro straight from the terminal.
Metro from the airport to the centre in 15 minutes; great for one night.
Easy airport train and a very walkable centre.
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.
US preclearance on the way home means you land in the US as a domestic arrival.