I have a 30mileRT commute. It takes me about 1h10min in the morning and 1h15+ in the evening. The morning is more down hill towards the ocean, and evening up away from it. Best I've ever done is 1hr flat. I'm mostly limited by stop lights. If I drive it takes me that long, if not longer in the evening. So its still way better because I get to ride instead of sitting in a car for that amount of time. Bus is 1hr15+ in the morning and 1hr30min to 2hr+ at night.

When I first started riding it took me 1h30min each way. I think that is about my limit. I'd have to find a new job or living situation after that point.