Table 4. Systemwide Revenue Passenger-Miles (RPMs) on U.S. Airlines, Seasonally-Adjusted, January 2018
Systemwide (Domestic + International) RPMs (seasonally-adjusted) in billions (000,000,000), Scheduled service only
Dataset Table:
| 2015 | 2016 | 2017 | 2018 | |
|---|---|---|---|---|
| January | 73.2 | 76.6 | 79.3 | 81.5 | 
| February | 73.6 | 76.9 | 78.7 | |
| March | 74.5 | 76.4 | 79.5 | |
| April | 74.0 | 77.1 | 80.4 | |
| May | 74.6 | 77.7 | 80.6 | |
| June | 74.9 | 78.2 | 80.9 | |
| July | 75.6 | 77.7 | 81.4 | |
| August | 76.1 | 77.1 | 81.2 | |
| September | 75.9 | 78.3 | 77.9 | |
| October | 76.8 | 78.2 | 81.5 | |
| November | 76.2 | 78.5 | 81.7 | |
| December | 77.0 | 78.9 | 81.5 | |
Notes:
Revenue passenger-miles are a measure of the volume of air passenger transportation. A revenue passenger-mile is equal to one paying passenger carried one mile.
Source:
Bureau of Transportation Statistics, T-100 Segment