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Flight Reliability

DL 2121 · Delta Air Lines

Minneapolis → San Diego (MSP–SAN)82% of its flights flew this route. The rest (SAN–MSP, ATL–MCI) are included in these numbers.

91
Nerd Approved
WanderNerd Reliability Score
84%
Arrive within 15 minutes
0 min
Average arrival delay
0.2%
Cancelled
8 min early
Median arrival delay

Based on 414 historical flights. Data through May 2026.

What the data says

Skip Monday if you can.

DL 2121 arrived on time 90% of the time on Tuesdays. On Mondays: 76%.

A bit ahead of the MSP–SAN route.

DL 2121 arrived on time 84% of the time, versus 77% across the MSP–SAN route.

It basically never cancels.

Out of 414 scheduled flights, only 0.2% were cancelled.

Trending in the right direction.

DL 2121 arrived on time 90% of the time over the last three months in the data, compared with 72% in the three months before that.

The breakdown

On-time by weekday
  • Mon76%(58 flights)
  • Tue90%(58 flights)
  • Wed88%(58 flights)
  • Thu83%(60 flights)
  • Fri85%(60 flights)
  • Sat80%(60 flights)
  • Sun83%(59 flights)
On-time by departure window
  • 6–9 AM82%(121 flights)
  • 9 AM–12 PM84%(268 flights)
  • 12–3 PM83%(24 flights)
On-time trend by month
95%
May

Jun 87% → May 95% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202587%30
July 202581%31
August 202581%31
September 202587%30
October 202584%31
November 202587%30
December 202568%31
January 202665%31
February 202684%45
March 202692%37
April 202683%30
May 202695%56
Departures on time
90%
Diverted
0%
Flights flown
413
Months covered
12

Same route, other flights

Keep nerding

Based on 414 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.