Translation of happen in Spanish

We had three more days and the city which was plenty of time if not even too much. It is true that this city is unique and that you can spend there over a month, but we started to miss the countryside.
The trip was coming to an end. We were driving to the airport knowing that we had to fly 12-hour to Spain, than a break in Spain for of around 6 hours and than the rest 4 hours, a total of 22 hours.
Fortunately and against all odds there were seats available so that we changed our booking to the same day. Our destination was El Calafate in the South of Patagonia in order to see the glaciers.