Hello, I have a multi-leg itinerary coming up. One segment has me flying from Colorado Spring to Denver to Phoenix, and I only have 36 minutes between the Colorado Springs and Denver flight (and it looks like the small planes arrive at one side of the terminal and the big planes depart from the other side of the terminal). If I do not make the connection, the next flight to Phoenix is 6 hours later. Since the drive to Denver from Colorado Springs is only a little over an hour, I am thinking about canceling my COS-DEN leg and just driving to Denver to make sure that I do not miss my Denver to Phoenix flight. Should I do this as a same day itinerary change? Can I call today and make the change without the $200 change fee since I am just dropping one leg of a trip (online, I can do this but must pay the $200 change fee)? I am a Mileage Plus gold member, but I'm not sure that will mean much. Thank you for any guidance that you can provide.