Yes, you can technically travel to the Schengen Area in Europe with four months left on your passport, but you must be extremely careful with your return dates. The standard rule for the 29 countries in the Schengen zone is that your passport must be valid for at least three months after the date you intend to leave Europe. If you have four months of validity left and plan to stay for only two weeks, you are within the legal limit. However, if you plan to stay for 45 days, you would be violating the "three-month buffer" rule and would likely be denied boarding by your airline. It is also important to note that your passport must have been issued within the last 10 years on the day you enter. For 2026 travel, with the rollout of the new Entry/Exit System (EES) and the upcoming ETIAS authorization, border controls are becoming even more automated and strict. To avoid any potential issues with gate agents or border guards who may interpret the rules conservatively, most travel experts recommend renewing your passport if you have less than six months of validity remaining.