It was almost the perfect year. Honestly, for a long while there, it felt like the Kansas City Chiefs were simply untouchable. They kept winning games they had no business winning, pulling out fourth-quarter miracles like they were going out of style. But even the best dynasties have bad days. If you’re asking who did the Chiefs lose to in 2024, the answer actually involves a few specific heartbreakers that defined their season—from a regular-season reality check in Buffalo to a shocking blowout in Denver and a Super Bowl defeat that ended the three-peat dream.
They finished the regular season with a stellar 15-2 record, but those two "L" marks on the schedule tell a much bigger story than just a final score.
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The First Crack in the Armor: Buffalo Bills
For ten weeks, Patrick Mahomes and company were flawless. They were 9-0. People were starting to whisper about an undefeated season. Then came November 17. The Chiefs traveled to Highmark Stadium to face Josh Allen and the Buffalo Bills, and the vibes shifted.
It was a back-and-forth slugfest that felt like a playoff game in the middle of November. The Chiefs actually held the lead at points, thanks to two touchdown passes from Mahomes to Noah Gray. But the Bills weren't playing around. The turning point came late in the fourth quarter when the Bills faced a 4th-and-2. Instead of kicking a field goal to play it safe, Josh Allen tucked the ball and ran 26 yards for a touchdown. That 30-21 loss was the first time in 2024 that the Chiefs looked truly vulnerable.
The Weird One: The Denver Blowout
If the Buffalo loss was a hard-fought battle, the second loss was just bizarre. On January 5, 2025 (which technically wraps up the 2024 regular season), the Chiefs headed to Denver to play the Broncos in Week 18. By this point, Kansas City had already clinched the top seed in the AFC.
They had nothing to play for. Denver, on the other hand, was playing for pride.
The result? A 38-0 shutout. You read that right. Zero points. It’s kinda rare to see a Reid-led team get blanked, but they rested several key starters and basically treated it like a preseason game. While it didn't hurt their playoff positioning, it was a weird way to end the regular season. If you're looking for the data on who did the Chiefs lose to in 2024 during the regular season, the Broncos are the second name on that very short list.
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The Super Bowl LIX Heartbreak
After the regular season ended, the Chiefs went on a tear in the playoffs. They handled the Houston Texans 23-14 in the Divisional Round and then got their revenge on the Bills with a 32-29 win in the AFC Championship. They were headed back to the Super Bowl, looking to become the first team ever to win three in a row.
But the Philadelphia Eagles had other plans.
On February 9, 2025, in the Caesars Superdome, the dream died. The Eagles absolutely dominated the game from the jump. The final score was 40-22. It wasn't particularly close. Jalen Hurts and that Philadelphia offense moved the ball at will, and the Chiefs' defense—usually so stout under Steve Spagnuolo—just didn't have an answer that night.
Why These Losses Mattered
Looking back at who did the Chiefs lose to in 2024, you see a pattern of high-stakes competition and strategic rest. The Bills loss showed that even with "Mahomes Magic," a team can be out-muscled by another elite quarterback. The Denver loss was a calculated decision to stay healthy. The Super Bowl loss, though? That one will sting for a while. It reminded the league that despite the "dynasty" talk, the gap between the Chiefs and the rest of the NFL isn't as wide as it sometimes looks.
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2024 Chiefs Losses At A Glance
- Week 11: Buffalo Bills 30, Chiefs 21 (Away)
- Week 18: Denver Broncos 38, Chiefs 0 (Away)
- Super Bowl LIX: Philadelphia Eagles 40, Chiefs 22 (Neutral)
Basically, if you wanted to beat the Chiefs in 2024, you either had to catch them while they were resting (Denver), play a perfect game in the cold (Buffalo), or be the best version of the Philadelphia Eagles.
If you’re tracking the Chiefs' performance for your own sports analysis or just to win a bar argument, keep these details in mind. The "losses" column is small, but the context of each game is huge. For your next step, you might want to look into the 2025 offseason moves the Chiefs made to address the defensive gaps seen in the Super Bowl. Watching how they handle the offensive line depth after that Eagles game will tell you everything you need to know about their 2026 outlook.