Quickest 7h 33min
There are 3 flights1 train company operating 2 routes - Sunset Limited, Crescent, and 3 buses from CHO to IAH. The cheapest train costs $213 and is 1d 1h 30min.
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There are 4 ways to travel from CHO to IAH. 3 flights, 4 trains, 3 buses and 1 by car are possible between the two areas. The by car from CHO to IAH is the cheapest. The flight from SHD to IAH is the fastest. The train operated by Amtrak running from CVS to HOS is the most convenient.
It's important to check each mode when booking your ticket so that you can find the best method for you. The cost of each type varies differently, so be sure to use Faretrotter to keep an eye out!