The regular season began on March 23, and concluded on May 27.
The postseason ran from June 1 until June 9, when the London Monarchs defeated the Barcelona Dragons 21–0 in World Bowl '91 at Wembley Stadium in London, England.
[1] At London, Barcelona, Frankfurt and Montreal, attendances surpassed early expectations.
[2] The Monarchs' home attendance led the league, with an average of 40,481 in the regular season.
[3] The dress rehearsal for the World Bowl, London v Barcelona at Wembley in week 10, attracted 50,835 fans,[4] while the same week Frankfurt v Sacramento received a bigger crowd, 51,653,[4][3] with around 10,000 more fans turned away.