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Table 19. Systemwide Available Seat-Miles (ASMs) on U.S. Airlines, Unadjusted, September 2017, December 2017

Systemwide (Domestic + International) ASMs (unadjusted) in billions (000,000,000), Scheduled service only

Dataset Table:

2014 2015 2016 2017
January 79.8 83.4 86.3 90.0
February 72.5 74.5 82.0 81.4
March 88.2 90.3 94.2 96.8
April 84.8 88.6 91.6 94.8
May 88.5 92.8 96.4 99.5
June 92.0 95.7 99.9 103.7
July 96.5 101.0 104.4 108.6
August 94.0 98.6 101.8 105.8
September 83.5 87.3 90.4 91.4
October 86.1 89.5 92.2 96.4
November 81.7 84.9 86.9 90.3
December 86.8 90.3 93.0 96.2
Yr. Total 1,034.4 1,076.9 1,119.1 1,154.9

Notes:

Available seat-miles are a measure of the capacity of air passenger transportation. An available seat-mile is equal to one aircraft seat carried one mile.

Source:

Bureau of Transportation Statistics, T-100 Segment