In the past, I've spent up to 3-4 hours commuting every day (including up to 40 minutes waiting for a shuttle to take me to the nearest train station, I was working in an industrial estates, with lots of drug dealing, mugging and gang raping around, so no way you could just walk to the station). I was working very long hours, so Monday to Friday I would leave home between 6am and 7am and come back between 9:30pm and 10:30pm. On Saturdays, I would leave at 6am and be back at 7pm.
Then I moved to a smaller town and for the first couple of years I was able to walk to work (up to 40 minutes each way; never less than 20 minutes each way).
Then I moved jobs and spent around 40-45 minutes commuting every morning and 45 minutes to 1 hour every evening (because of traffic jams). It was an industrial zone again so there were very few buses, and little flexibility for travelling times.
I moved jobs again and had a 40 minutes to 1-hour commute every morning (20' walk to the railway station, 10' train ride, 10' walk to the office). I would leave at 8am, aiming to make into the office before 9am. In the evening, my commute was longer. I finished work at 5:30pm, but the trains were always delayed so I often I would not make it back home until just before 7pm.
I've moved house and now have a 2-hour commute each day. I leave at 8:10am at the latest in the morning, walk 10' to the station, then wait for a train which is almost always late (up to 30'). I then have a 20-minute ride, and arrive into the office around 9am. In the evening, my train is at 6:07pm (when it is on time!) so again I don't make it home till 6:50pm or so.
The shortest commute I've ever had was a 10-minute walk to the office. However, that job was in a real estate agency, so I spent most of the day travelling around to show flats to prospective buyers!
I'm still jobhunting and I think I might end up travelling 6 hours a day, or even staying in a houseshare Monday to Friday, and coming home only at the weekend... So many people have been made redundant in the area where I live, it's really difficult to find work :(