Delta Air Lines set company records last month when 5.43 million passengers boarded Delta flights, surpassing the old record, set last July, by more than 57,000.

Revenue passenger miles for the month totaled 4.49 billion, a 12.2 percent increase over the 4.00 billion reported in March 1987.Available seat miles increased 7.5 percent to 7.36 billion from 6.85 billion reported for the like month last year.

Among the individual cities setting records was Atlanta where Delta boarded 1.15 million passengers, beating the old record set in July l987 by over 25,600 passengers. Dallas/ Fort Worth and Salt Lake City both set March records with 478,293 and 344,073 passengers respectively.