The trip from Frederick to Bethesda is about 65 kilometers and takes 55 minutes by car. You will travel south on I-270, which provides a direct link to the Bethesda area. This is a common commute for those working in the DC suburbs. Public transit options are available, but driving is the most common method for this route.
Total Distance: 65 km driving, 55 km air distance.
I-270 is notorious for heavy traffic; plan accordingly.
Anytime, but avoid rush hour for a smoother trip.