FUR FLIES OVER GIULIANI DIG AT RIVAL.(CAPITAL REGION)

Byline: TIMOTHY WILLIAMS Associated Press

NEW YORK -- Call this one the flight flap.

A day after Mayor Rudolph Giuliani blamed First Lady Hillary Rodham Clinton's travels for delaying air traffic at La Guardia Airport -- drawing denials from the Federal Aviation Administration and incurring the wrath of the First Lady's likely campaign -- the mayor said Thursday he was only joking.

During a speech in Washington on Wednesday, Giuliani quipped that he had to leave early because his plane back to New York might be delayed. He was referring to the previous day when flights at La Guardia Airport -- including the First Lady's -- were held up due to bad …