Well, since the race is over now, we have time to fill in some blank spaces in the timeline. I am quite sure that teams were starting at their hometowns, there was NO single location starting line as usual.
Since the theme of the next season, I think Phil used video stream to start the race. Teams were starting at their hometowns and used three connection airports to get to Mexico City.
Via Los Angeles - all of these teams started in Los Angeles.
1.) Tyler and Korey
2.) Erin and Joslyn
3.) Zach and Rachel
4.) Scott and Blair
5.) Dana and Matt... they ran under the radar, but I'm sure used LAX
Via Atlanta
6.) Sheri and Cole - I think their first flight was from Dothan, AL
7.) Jessica and Brittany - this is our missing Miami team. They live in Fort Lauderdale and they were forced (?) to fly MIA -> ATL -> MEX because of the geographical advantage they had.
Via Dallas
8.) Burnie and Ashley - they live in Austin
9.) Kurt and Brodie - they live in Dallas
10.) Cameron and Darius - they started in "the Birthplace of Rock 'n Roll" and travelled via Dallas
11.) Marty and Hagan - they live in McKinney, that's close to Dallas. This is where they started their race.
I wonder if producers were planning this since the beginning, or they came up with this idea after they saw team's hometowns.