The classic Box & Jenkins airline data. Monthly totals of international airline passengers, 1949 to 1960.
A monthly time series, in thousands.
Source
Box, G. E. P., Jenkins, G. M. and Reinsel, G. C. (1976) Time Series Analysis, Forecasting and Control. Third Edition. Holden-Day. Series G.
Use the following R code to directly access this dataset in R.