Originally Posted by
schmare
While you're rebooking the flights you should also check on the visa requirements for the double USA connection. Similar to a FRA-MXP connection, a double USA connection may require either a transit visa or a "real" visa. better safe than sorry on this round of tickets!
Even a single US transit requires a full US visa. My relatives planning BOG - ATL - AMS were informed they need a US visa, so they changed their plans.