I am a US citizen and know the 90-day allotted rule. But this time I need clarification. I am entering France on May 18th and had planned on departing Spain on August 16th - exactly 90 days.
But I have booked a repositioning cruise that departs from Lisbon on August 26th. So I think, or at least hope, I could depart Spain for the UK on August 14th or 15th and would still be able to return to Lisbon for 1 day on the 26th and still be within my 90 days? Sure hope someone can answer this question for me before I confirm my cruise!
Added from a now deleted answer:
I have rearranged my departure from Spain to the UK to give myself a 4-day buffer before I would reach my 90-day limit in the Schengen. I will fly into Lisbon the morning of the 26th of August and the cruise departs (for the States) at 11:00 p.m. that evening.