> Why does international flight mean 2 full suit cases?
Certainly 1 full suitcase?
Shirts, pants, socks, underwear, perhaps a suit or two, and a pair of extra shoes? I can easily fill a suitcase with that stuff.
Do you do laundry on your trip? That would certainly significantly reduce the quantity of clothes required. Now that all airlines are charging per bag (previously all airlines allowed two free bags) it probably makes more sense to figure out how to wash clothes abroad than to lug around a lot of extra clothing.