One of the goals of the EES is to automate the "check(ing of) the number of days you are still allowed to stay on the territory of European countries." You are allowed to stay in the Schengen area for 90 days in a 180 day period. If you exceed this, you will not be allowed to enter.
During our trip to Europe in the summer of 2026, we encountered confusion on both entry and exit. This confusion led to one border agent asking "Where did you enter Europe?". Upon answering him, he responded "Well, he didn't do his job." but let us pass.
It seemed mildly amusing at the time, since he let us depart but a recent article put a completely different perspective on it.
This article noted that if you don't clear EES upon exit, the clock is still running on your stay. This could be mitigated by an old fashioned passport stamp but there are dependable reports of this not being done recently.
So the question is "Did the EES note my EXIT from the Schengen area?" If not, the clock could still be running on your stay and you could be denied subsequent re-entry and/or fined. And of course, that would happen at your place of entry AFTER you had flown across the Atlantic.
You can check this at the EU's own web site here.
If the EES didn't record your exit, go check your passport for an exit stamp. If there's no exit stamp, go back to your airline and retrieve your flight itinerary. Present these when you re-enter the Schengen area.
Good luck!
