Entering Germany with a one-way ticket in 2026 is technically legal but highly risky for non-EU/EEA citizens traveling on a tourist visa or under a visa-waiver program (like ETIAS). German border guards have the authority to refuse entry if they suspect you intend to reside in the country illegally. To mitigate this, you must be prepared to show proof of onward travel (such as a bus ticket to Prague or a flight back home) or evidence of significant financial means to purchase a return flight. For 2026 travelers, a common "workaround" is to book a "fully refundable" return ticket and cancel it after clearing customs. However, if you are entering on a specific long-stay National Visa (for work, study, or family reunification), a one-way ticket is perfectly acceptable and expected. For standard tourists, having a return flight confirmation on your phone is the best way to ensure a "no-questions-asked" entry at major hubs like Frankfurt or Munich.