We have booked a trip to BA next month. Our return flight departs EZE at 0845. Would you expect we would have an issue with traffic with such an early departure time? What time should we plan on being at the airport to be able to checkin and get thru security with the minimum possible stress? We will be travelling in Business Class on LAN. We were planning on staying at the Hyatt the night before departure thanks to Hyatt points. Is there any need to be at a hotel closer to the airport? I know these are probably silly questions but a girl needs to know these things.