SALT LAKE CITY, UT - APRIL 15: (FILE PHOTO) A Delta plane taxies as a Northwest plane sits at the gate at the Salt Lake International Airport on April 15, 2008 in Salt Lake City, Utah. It was announced on April 23, 2008 that Atlanta-based Delta Air Lines Inc. reported a first quarter $6.39 billion loss, citing the surge in rising fuel costs, while Northwest lost 4.1 billion.