(Reuters) - Tom Brady fired three touchdown passes and LeGarrette Blount rumbled for three more as the New England Patriots demolished the Indianapolis Colts 45-7 on Sunday to book their sixth trip to the Super Bowl in 14 years.

The Patriots head to Phoenix for the Feb. 1 National Football League showcase where they will face the defending Super Bowl champion Seattle Seahawks who clinched their return with a heart-pounding 28-22 overtime comeback win over the Green Bay Packers.

Seattle will be bidding to become the first team to win back-to-back Super Bowls since Brady took the Patriots to consecutive titles in 2004 and 2005.

The rout gives the Patriots an eighth Super Bowl appearance, tying them with the Pittsburgh Steelers and Dallas Cowboys for the most in league history.

While the NFC championship was heavy with drama there was no edge-of-your-seat excitement at rainy Gillette Stadium as the Patriots charged to a 14-0 first-quarter lead and never were threatened, giving coach Bill Belichick his 21st career playoff victory to break the record he shared with Tom Landry.