My door-to-door commute is 17.7 miles (28.49 km) , give or take the GPS accuracy. This last time it took me 1hr 22min. That ride in itself isn't that epic but for a "get to work" or a "get home from work" time it is. And for me it's the time, not the distance.
Currently I'm only commuting one-way but working towards doing it 4 days a week.