Originally Posted by the_traveler
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Otherwise, you must exit Concourse C (via an underground walkway) through Concourse B, and exit landside. Then a walk to Terminal 2 and enter through security, to get to Concourse F.
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Even without the Shuttle, there is no need to exit the terminal and reenter. You can walk all the way to F gates from Conc C. It is a looong walk, but can be done.