I did the DEN-BOS commute for 5.5 years. Between B6, SWA and UAL, I could probably count on one hand the number of times I didnt get on a flight, albeit a majority of offline was in the 737 jumpseat. And, if things ran on schedule, I never spent an extra night away from home as a result of not being able to get on a flight.

There are definitely a fair amount of DEN commuters, but outside of the length of the flight, and the time change, it wasn't a challenging commute.