kajonesbu

My wife and I are planning a trip to Argentina and Chilean Patagonia this November and wanted to get people's thoughts on a potential itinerary. Here's what we've mapped out thus far:

Day 1 - Explore BA (arrive in morning from US).
Day 2 - Fly to Mendoza. Explore Mendoza.
Day 3 - Mendoza. Explore some of the local vineyards.
Day 4 - 7 - Fly to Calafate. Looking at staying at the Tierra Patagonia (Chile) thus they would provide transfer to the hotel. Spend a few days hiking/exploring Torres del Paine National Park.
Day 8 - Transfer back to Calafate and fly back to BA. Spend day/night in BA.
Day 9 - Spend day exploring BA and fly red-eye back to US.

Couple of questions in regards to travel and things to do:

- How far in advance do I need to book inter-Argentina flights. Aerolineas Argentina appears to the easiest option. How reliable is Aerolineas Argentina?
- How easy would it be to transit at AEP? Thinking of buying round trip tickets BA to Mendoza and then another set of round trip tickets from BA to Calafate v. multi city since it's cheaper.
- Any recommendations for some must sees in BA? I was there over 10 years ago thus some things may have changed.

Thanks!