Frankfurt am Main is Germany's financial capital and one of continental Europe's busiest transport hubs, and a rental car here is a genuinely useful way to explore both the city and its position at the center of the country's autobahn network. It is worth clearing up a common point of confusion first: Frankfurt Airport (FRA) is the city's real, major gateway, with a vast rental car center serving international and local companies, while Frankfurt-Hahn Airport (HHN), sometimes marketed under the Frankfurt name by budget airlines, actually sits roughly one hundred twenty kilometers away in a different region entirely, so travelers booking a flight to Frankfurt-Hahn should expect a considerably longer transfer than one to the real Frankfurt Airport.
From central Frankfurt or FRA, the city sits at a genuine crossroads of German autobahns, with routes fanning out toward Cologne and the Rhine Valley to the west, Munich and Bavaria to the south, and Berlin to the northeast, making Frankfurt a natural base for longer road trips as well as day drives into the surrounding Rhine-Main region. The Taunus hills and the wine-growing Rheingau district are both within roughly forty-five minutes to an hour of the city center, offering an easy contrast to Frankfurt's dense, high-rise downtown.
Driving is on the right throughout Germany, and while sections of the autobahn network famously carry no blanket speed limit, urban Frankfurt and its immediate suburbs are subject to standard posted limits and can see heavy commuter traffic, particularly during weekday rush hours. Fuel stations are abundant throughout the city and along every autobahn corridor, and Frankfurt's compact downtown, with its mix of pedestrian zones and one-way streets, is often easier to navigate on foot or by transit before picking up a car for excursions beyond the city center itself and into the wider Rhine-Main region.