The classic Box & Jenkins airline data. Monthly totals of international airline passengers (1949--1960).
Source
Makridakis, Wheelwright and Hyndman (1998) Forecasting: methods and applications, John Wiley & Sons: New York. Exercise 2.4, Chapter 3, Exercise 4.7.
References
Box, Jenkins and Reinsell (1994) Time series analysis: forecasting and control, 3rd edition, Holden-Day: San Francisco. Series G.
Examples
plot(airpass)
seasonplot(airpass)
tsdisplay(airpass)