For a few months, working on site, I had about a 120 minute (I think it was around 90 miles) commute each way. I had no problems with it at all because it was a lot of back roads and at worse light traffic. From there a handful of times I had to go to a secondary site which added maybe another 45 minutes (maybe another 25–30 miles) each way, again, no real traffic, just trees, farms, and generally a nice drive. I actually enjoyed going each day and aside from sometimes working late never thought it was “too far”.
On the other hand, I had a commute that was about 25 miles each way down the 2 primary arteries of my area. Most mornings it took 85 minutes in each direction. I despised that drive and when I was offered a permanent position turned it down without hesitation because of it.
So my limit is realistically about 2 hours each way if there’s no traffic. But heavy bumper to bumper traffic can dramatically shorten my patience.