I guess it depends on the state and county you where you live. In DeKalb County, GA my wife and I have both been summoned for jury duty--more than once--at a time that will conflict with an upcoming trip (be it doemestic or international). We have never had a problem with calling the Jury Manager and rescheduling for a date that will not conflict with upcoming travel. We actually negotiate a date rather than leaving it to chance, since we travel pretty regularly, and that avoids the same problem (a conflicting date) re-occurring. They need to schedule a jury pool every day so it doesn't seem to matter to them if you suggest a date--or range of dates--where you won't have a conflict, and they'll need to fill a pool on that day just like on your original one.