Kinda depends, they're big places. Des Moines to Atlanta, call it 900 Miles, so a little over a day maybe 2 days tops unless you open the doors a lot.
2-3 days
it depends a car 3days a plain 2 days
it depends
10 hrs.
I think it takes two days.
Like about 8 to 11 hours
3.6 seconds, if there's a tailwind
It all depends on where you are going to in Iowa. You can go southeast on Highway 42 (Arrowhead Parkway) from Sioux Falls and reach the Iowa border in about 20 minutes.
First Class mail is delivered in 3 to 5 days.
It take from 2 days up to a week. But, here is a link so you can know every state to Iowa. In case you or a friend, or relative was ever wondering or just curious.
1 week, 2 weeks at most.