The distance from Oakland to Cincinnati is approximately 3,200 kilometers. The most practical mode is a flight from OAK or SFO to Cincinnati/Northern Kentucky International Airport (CVG). Alternatively, you can take the Amtrak California Zephyr to Chicago and transfer to a bus or rental car, as there is no direct train service to Cincinnati. Flying takes about 5.5 hours, while the combined train/bus journey takes over 3 days.
Total Distance: 3,200 km air distance.
Southwest offers many direct and connecting flights to CVG.
Spring or Fall for mild weather and outdoor activities.