Information provided by BetOnline.ag and SportsBetting.ag illustrates which teams have received the most betting interest to win the Super Bowl heading into the 2019 season.
 
Teams that have received most bets to win Super Bowl:

(Report from SportsBetting.ag)

1. Cleveland Browns (8.5 percent of all wagers)
2. New England Patriots (7.4)
3. Philadelphia Eagles (6.7)
4. Kansas City Chiefs (6.3)
5. Chicago Bears (5.1)

(Report from BetOnline.ag)

1. Kansas City Chiefs (9.0 percent of all wagers)
2. New Orleans Saints (7.0)
3. New England Patriots (6.3)
4. Cleveland Browns (5.8)
5. Chicago Bears (5.6)

However, just because a team has attracted the most bets doesn't necessarily mean it could be the book's largest liability.

Teams that will incur largest loss for the sportsbook if they win Super Bowl:

(Report from SportsBetting)

1. Browns
2. Eagles
3. Colts

(Report from BetOnline)

1. Browns
2. Bears
3. Packers

Teams that have received fewest bets to win Super Bowl:

(Remainder of data from SportsBetting)

1. Tampa Bay Buccaneers (0.8 percent of all wagers)
2. Tennessee Titans (1.2)
3. Cincinnati Bengals (1.3)
4. Miami Dolphins (1.3)
5. Arizona Cardinals (1.4)