Coming into Oklahoma City from the south on I-35, best route depends on where you want to come out.
Going east or west, I prefer taking I-240 most times of the day, unless I have a local destination on I-40.
Going north out I-35, or northeast out 1-44, I'll usually take I-235 up to the I-44 expressway if I-40 looks backed up onto the exit ramps, otherwise I just follow the I-35 routing using 1/2 mile of I-40. The second junction, I-35 leaving I-40, is conveniently in the far right lane for northbound I-35.
A lot of people like to go up 235 to the Kilpatrick Turnpike, particularly if they are leaving OKC on I-44, because for 44 it is a straight through the second 35/44 junction. But for getting back onto I-35 to go north it is messier than the alternatives.
Tom Test
Itasca Spirit 29B