Revenue per available seat mile (RASM) is a unit of measurement commonly used to compare the efficiency of various airlines. It is obtained by dividing operating income by available seat miles (ASM).

UBS initiated coverage on multiple carriers in the U.S. aviation sector, viewing supply/demand balance as the most important driver of airline Revenue per Available Seat Mile (RASM) growth and ...

At an investor update, Alaska Air Group stated that it now expects current-quarter RASM to grow between 1% and 2% on a year-over-year basis. The previous forecast on Feb 19, 2019, had projected ...

Southwest Airlines (LUV) now expects its second-quarter revenue per available seat mile to decline in the range of 4%-4.5% year over year (previous guidance: 1.5%-3.5% decline).