CHICAGO, May 27 (Reuters) - American Airlines AAL.O is sticking with its full-year profit outlook despite a sharp jump in fuel prices, CEO Robert Isom said at a Bernstein investor conference on Wednesday, as stronger revenue, premium demand and corporate travel help cushion the hit from rising oil costs.

Isom said there was "no doubt" demand had a K-shaped pattern, with higher-income travelers outpacing middle- and lower-income customers.

Still, he said travel was growing across income groups, with American about 80% booked for the second quarter, corporate travel up 13% year over year and leisure demand "incredibly" strong.