I will be departing from T4S, but checking into T4 for my flight to the USA in July. I'd like to know the following:
1. If my flight leaves at 8:30 AM, and I arrive at 6:30 AM, should that be plenty of time to check in? I do not have any checked bags.
2. For returning my rental car from Sixt, is there anything in particular that I should be aware of when driving in from the Central Business District of Madrid?
3. Do you have to go through customs when departing the country as well?
4. If flying US Airways, can I check-in online as I do here in the states, and use the boarding pass in the app?
Thanks in advance for your insight!