9 Times
The A's have won the World Series 9 times - 5 times as the Philadelphia A's and 4 times as the Oakland A's.
Depending on what you are looking for: Athletics Franchise (Philadelphia & Oakland) World Series Championships 9 World Series Game Victories 41 Oakland Athletics World Series Championships 4 World Series Game Victories 17
Three
The A's have been to the World Series 14 times, winning 9 times. They won as the Philadelphia Athletics in 1910, 1911, 1913, 1929 and 1930. They won as the Oakland Athletics in 1972, 1973, 1974 and 1989.
Since the Athletics moved to Oakland they have been in 6 World Series (1972, 1973, 1974, 1988, 1989, 1990) and have played 32 World Series games, winning 17 and losing 15.
They have been to the world series 11 times .
The 1972 World Series went to 7 games, won by the Oakland Athletics over the Cincinnati Reds.
Four - '69 Won World Series, 73 Lost World Series to Oakland A's, 86 Won World Series & '00 Lost World Series to dreaded Yanks
Since the A's moved to Oakland in 1968, they have been to the World Series 6 times: 1) 1972 - defeated the Cincinnati Reds 2) 1973 - defeated the New York Mets 3) 1974 - defeated the Los Angeles Dodgers 4) 1988 - lost to the Los Angeles Dodgers 5) 1989 - defeated the San Francisco Giants 6) 1990 - lost to the Cincinnati Reds The franchise went to the World Series 8 times while located in Philadelphia, winning 5 of the 8.
They have been to the World Series 11 times .
The New York Mets have gone to four World Series. They defeated the Baltimore Orioles in 1969 and the Boston Red Sox in 1986. They lost to the Oakland A's is 1973 and the New York Yankees in 2000.
The Detroit Tigers have gone to the World Series (won the pennant) 10 times.