The first season of play ended with a championship game, which was played in the rebuilding (post-Katrina) city of New Orleans, Louisiana and was hosted by the New Orleans Blaze. The game was between the St. Louis Slam (American Conference - St. Louis, MO) and the West Michigan Mayhem (National Conference - Kalamazoo, MI). The game came down to the last few plays and the St. Louis Slam became the first National Champions in the WFA with a final score of 21-14. Additionally, there was an International Game played between the upstart Aguilas Regias of Monterrey, Mexico and the hosting team, New Orleans Blaze. The Blaze won this game 12-0.
The WFA grew in the second year (2010) to have over 40 teams competing for the National Championship. The national championship for the 2010 season was accompanied by the first All-American game. The term All-American is used by the WFA to represent the best players at all positions from all WFA teams. The teams were chosen partly based on statistics and partly based on the vote of head coaches. The All-American game was played just before the championship game in Las Vegas, Nevada and was hosted by the Las Vegas Showgirlz. The All-American game was won by the American Conference. The second championship in the WFA would again come down to the last few plays and have a score differential of only four points. The Lone Star Mustangs (American Conference - Dallas/Fort Worth) defeated the Columbus Comets (National Conference - Columbus, Ohio) to become the second National Champions of the WFA by a score of 16-12.
The WFA opened the season with 50 teams. Running back Whitney Zelee (Boston Militia) made headlines in 2013 by becoming the league's first player to surpass 2,000 rushing yards in a football season, setting a league record of 2,128 yards. After losing the title game in the previous season, the Chicago Force returned to win the 2013 championship over the Dallas Diamonds 81-34 at Balboa Stadium, San Diego, California.
The WFA opened the season with 42 teams. The Boston Militia became the league's first two-time champion in 2014, winning 69-34 in a title rematch with the San Diego Surge at Lane Tech Stadium in Chicago, Illinois. During championship weekend, the league introduced a new mid-major bowl game: the Alliance Bowl. The Seattle Majestics of the American Conference faced the Indy Crash of the National Conference in a contest to "showcase of the depth of quality teams that exist in the Women's Football Alliance."  The Indy Crash prevailed 26-12. This season was also notable for the introduction of Kenneth Massey Ratings into the league's playoffs system.