Source: http://us.imdb.com/Charts/usatopmovies.html

Top SF Blockbusters (boxoffice over 100 million US dollars)

Title
Gross (in US dollars)
Star Wars (1977/1997)** 460,935,655
E.T.: The Extraterrestrial (1982) 399,804,539
Jurassic Park (1993) 356,763,175
Star Wars: Episode I - The Phantom Menace (1999)* 328,072,869
Return of the Jedi (1983/1997)** 309,064,373
Independence Day (1996) 305,400,800
The Empire Strikes Back (1980/1997)** 290,158,751
Batman (1989) 251,188,924
Men in Black (1997) 250,147,615
The Lost World: Jurassic Park (1997) 229,074,000
Back to the Future (1985) 210,609,762
Terminator 2: Judgment Day (1991) 204,843,345
Armageddon (1998) 201,470,728
Batman Forever (1995) 184,031,000
The Matrix (1999) 163,869,151
Batman Returns (1992) 162,831,698
Gremlins (1984) 148,168,459
Deep Impact (1998) 140,387,792
Godzilla (1998) 136,142,003
Superman - The Movie (1978) 134,218,018
Close Encounters of the Third Kind (1977) 128,290,347
Total Recall (1990) 119,394,839
Back to the Future Part II (1989) 118,450,002
Star Trek IV: The Voyage Home (1986) 109,713,132
Superman II (1980) 108,185,706
Batman & Robin (1997) 107,285,000
Contact (1997) 100,850,000

*: Indicates a movie still in release (as of 1999).
**: Including Special Edition reissue.