We’re a month into the NFL season and the good teams are starting to separate themselves from the bad.

At this early stage of the campaign, a handful of undefeated teams are typically chasing the dream of perfection. The 2024 NFL season has been unorthodox in that sense, with only two teams still holding a zero in the loss column.

One team is exactly where they are expected, while the other team delivers a pleasant surprise with an unforeseen comeback story.

Who are the two remaining undefeated teams in the NFL this season? The Sporting News explains below.

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Undefeated teams in the NFL

The Chiefs and Vikings are the only two 4-0 teams remaining in the NFL through four weeks.

Kansas City has four quality wins, beating the Ravens and Bengals at home and the Falcons and Chargers on the road.

Minnesota’s wins are impressive in their own right, beating the Giants in New York and then Super Bowl contenders in the 49ers, Texans at home and Packers on the road.

Who do the Chiefs play this week?

The Chiefs will host the Saints at Arrowhead Stadium on “Monday Night Football” in Week 5.

Kansas City will have to overcome key injuries on the offensive end, with running back Isiah Pacheco out with a broken fibula and breakout wide receiver Rashee Rice out with a torn ACL. It has made it to this point and is off to a perfect start in its pursuit of the first three-peat in NFL history.

Patrick Mahomes, Travis Kelce and co. will be tested against a New Orleans team that has been up and down thus far. It started the season 2-0 with convincing wins over the Panthers and Cowboys, but suffered consecutive losses to the Eagles and Falcons.

According to BetMGM Sportsbook, the Chiefs are 5.5-point favorites in the matchup.

If they can come away with a win, they will remain undefeated going into their Week 6 bye.

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Who do the Vikings play this week?

The Vikings will face a different kind of challenge to keep their undefeated record alive.

Minnesota will travel to London to take on the Jets at a neutral site at Tottenham Hotspur Stadium as part of the NFL’s London Games.

The Vikings’ strong start was made possible by one of the league’s best defenses and a revitalization from 2018 No. 3 overall pick Sam Darnold. Darnold secured the starting quarterback job when 2024 first-round pick JJ McCarthy suffered a season-ending torn meniscus.

Darnold hasn’t looked back since, leading the NFL with 11 touchdown passes through four weeks.

He will face Aaron Rodgers and the Jets, who carry a 2-2 record into the game. New York opened the season with a loss to the 49ers, but rebounded with consecutive wins over the Titans and Patriots. It comes off the back of a disappointing loss to the Broncos in poor weather conditions.

According to BetMGM Sportsbook, the Vikings are 2.5-point favorites in the matchup.

Like the Chiefs, if Minnesota can come away with a win, they will remain undefeated heading into their Week 6 bye.

History of undefeated seasons in the NFL

Undefeated regular season and won Super Bowl

The 1972 Dolphins are the only team in NFL history to complete an undefeated season. They went 14-0 during the regular season and went 3-0 in the playoffs to win the Super Bowl.

Undefeated regular season, but lost in playoffs

• New England Patriots 2007
• 1942 Chicago Bears
• Chicago bears from 1934

The 1934 and 1942 Bears and the 2007 Patriots all went undefeated in their respective regular seasons, but all lost in the Super Bowl.

The 1934 Bears went 13-0 in the regular season and lost the Super Bowl to the New York Giants. Back then there were no playoffs and the top two teams went to the ‘big game’.

The 1942 Bears suffered a similar fate, going 11-0 in the regular season and then losing the Super Bowl to the Washington Redskins.

The 2007 Patriots are the most recent example of a near-perfect season: They went 16-0 in 2007 and won two playoff games before falling to the New York Giants in the Super Bowl.