Most U.S. airlines already halted service to Venezuela, making American the last major airline to pull out, further isolating the nation.
Read more about this at money.cnn.com.
IATA sees downward pressure from fuel and labor costs as well as rising interest rates. Read more about this at cnbc.com.
Delta and Northwest announced their merger in April 2008, setting off a wave of consolidation in the airline business. Read more about this at cnbc.com.