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Flight Reliability

DL 1129 · Delta Air Lines

Denver → Minneapolis (DEN–MSP)

97
Nerd Approved
WanderNerd Reliability Score
92%
Arrive within 15 minutes
4 min early
Average arrival delay
0.8%
Cancelled
14 min early
Median arrival delay

Based on 365 historical flights. Data through May 2026.

What the data says

The 6–9 AM departure wins.

DL 1129 departing between 6–9 AM arrived on time 93% of the time, versus 85% between 3–6 AM.

Monday is the weak spot.

DL 1129 arrived on time 96% of the time on Thursdays. On Mondays: 83%.

Better than the DEN–MSP route average.

DL 1129 arrived on time 92% of the time, versus 78% across the DEN–MSP route.

Better than the Delta Air Lines network average.

DL 1129 arrived on time 92% of the time, versus 81% across the Delta Air Lines network.

The breakdown

On-time by weekday
  • Mon83%(52 flights)
  • Tue92%(52 flights)
  • Wed94%(52 flights)
  • Thu96%(52 flights)
  • Fri92%(52 flights)
  • Sat90%(52 flights)
  • Sun94%(50 flights)
On-time by departure window
  • 3–6 AM85%(41 flights)
  • 6–9 AM93%(321 flights)
On-time trend by month
94%
May

Jun 97% → May 94% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202597%30
July 202594%31
August 202590%31
September 2025100%30
October 202597%31
November 202590%30
December 202580%30
January 202684%31
February 202696%28
March 202690%30
April 202690%29
May 202694%31
Departures on time
94%
Diverted
0%
Flights flown
362
Months covered
12

Same route, other flights

Keep nerding

Based on 365 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.