From a Variety.com online article:
Fox has been selling 30-second ads in the event for between “north of $5 million” to as much as $5.6 million, Winter says. In contrast, CBS sought between $5.1 million and $5.3 million for a package of inventory in its 2019 broadcast of the event. Meanwhile, Fox is seeking between $2 million and $3 million for the most expensive advertising slots in its pre- and post-game coverage.
Madison Avenue is giving new consideration to the Super Bowl, the annual media extravaganza that it has seemed less excited about in recent years.
Fox Sports has sold all its available commercial inventory in Super Bowl LIV, slated to be broadcast from Miami Gardens, Florida, on February 2, 2020. It’s the first time in half a decade that the network showing the big game hasn’t had to go down to the wire to dispense with its high-priced ad slots, and suggests advertisers have found new appeal in the live telecast in an era when most of TV’s best-known programming has a significant component of on-demand viewership.