The drive from Mankato to Cedar Rapids is approximately 350 kilometers. You will travel east on US-14 and then south on I-35 to I-380. The trip takes about 4 hours. You will pass through scenic rural Iowa. It is a straightforward drive with minimal traffic.
Total Distance: 350 km driving distance, 300 km straight-line air distance.
Cedar Rapids has a great downtown area to explore.
Spring and summer for pleasant weather.