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Flight Reliability

DL 3799 · Delta Air Lines

Chicago → Minneapolis (MDW–MSP)80% of its flights flew this route. The rest (MSP–MDW, MSP–ICT) are included in these numbers.

67
Usually Fine
WanderNerd Reliability Score
71%
Arrive within 15 minutes
17 min
Average arrival delay
2.0%
Cancelled
4 min early
Median arrival delay

Based on 406 historical flights. Data through May 2026.

What the data says

The late departure is the smart one here.

DL 3799 departing between 6–9 PM arrived on time 74% of the time, versus 59% between 3–6 PM.

Skip Monday if you can.

DL 3799 arrived on time 78% of the time on Wednesdays. On Mondays: 66%.

Lagging the MDW–MSP route.

DL 3799 arrived on time 71% of the time, versus 78% across the MDW–MSP route.

Lagging the Delta Air Lines network.

DL 3799 arrived on time 71% of the time, versus 81% across the Delta Air Lines network.

The breakdown

On-time by weekday
  • Mon66%(59 flights)
  • Tue73%(60 flights)
  • Wed78%(60 flights)
  • Thu71%(58 flights)
  • Fri70%(59 flights)
  • Sat70%(46 flights)
  • Sun70%(56 flights)
On-time by departure window
  • 3–6 PM59%(68 flights)
  • 6–9 PM74%(330 flights)
On-time trend by month
74%
May

Jun 77% → May 74% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202577%30
July 202571%31
August 202580%30
September 202587%30
October 202587%30
November 202589%27
December 202547%30
January 202652%27
February 202683%35
March 202652%58
April 202672%39
May 202674%31
Departures on time
73%
Diverted
0%
Flights flown
398
Months covered
12

Same route, other flights

Keep nerding

Based on 406 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.