Yes, you can leave the airport during a layover in Germany, provided you have a valid Schengen visa or are a citizen of a visa-exempt country (like the US, UK, or Canada). For a successful "mini-trip," you should have a layover of at least 6 to 8 hours. If you are at Frankfurt (FRA), the regional train (S-Bahn) takes only 15 minutes to reach the city center (Hauptwache). At Munich (MUC), the train takes about 40 minutes to reach Marienplatz. Upon landing, you must clear immigration (passport control) and customs, which can take 30 to 60 minutes. It is essential to be back at the airport at least 2 hours before your next flight to clear security. In 2026, many German airports offer "digital lockers" where you can safely store your carry-on luggage for a small fee (approx. €5–€10). Leaving the airport is a fantastic way to stretch your legs and grab a local bratwurst or visit a museum, turning a boring wait into a highlight of your journey.