Dave Lieux and I were invited to ride on a charter to Zurich and back for the weekend. Due to all 204 seats being occupied we had to sit in the two jumpseats behind the captain. We left MIA at 1700 on a Friday and flew all night, arriving in Zurich at 7am Saturday their time. After checking in at the flight crew's hotel, Dave and I rode a train down to Lake Lucerne and then a cable car up a mountain. When we got back to our hotel in Zurich that night we went to a disco with the flight attendants. Our flight back departed at 7am Sunday Zurich time and we didn't land at MIA until the late afternoon.