Flying in Europe, it is about a 50/50 chance as to whether you get on the plane from a jet bridge or you take a bus to the plane parked on the tarmac. In contrast, most US airports have jet bridges, even when the plane is small unless it is a very small airport.
Why?
Denver is the second largest airport in the world after Dammam, Saudi Arabia, which doesn’t even seem to use much of its enormous amount of land from a quick look.
Denver’s airport is relatively new, was built way outside of town before the city really had a chance to grow into it, and is about twice the size of Manhattan.
I guess it really earns that murderhorse