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Flight Reliability

DL 1291 · Delta Air Lines

Dallas–Fort Worth → Salt Lake City (DFW–SLC)

89
Pretty Reliable
WanderNerd Reliability Score
89%
Arrive within 15 minutes
1 min
Average arrival delay
1.9%
Cancelled
10 min early
Median arrival delay

Based on 365 historical flights. Data through May 2026.

What the data says

Saturday is the weak spot.

DL 1291 arrived on time 94% of the time on Tuesdays. On Saturdays: 84%.

Well ahead of the DFW–SLC route.

DL 1291 arrived on time 89% of the time, versus 71% across the DFW–SLC route.

Better than the Delta Air Lines network average.

DL 1291 arrived on time 89% of the time, versus 81% across the Delta Air Lines network.

Recent months have been rougher.

DL 1291 arrived on time 86% of the time over the last three months in the data, compared with 93% in the three months before that.

The breakdown

On-time by weekday
  • Mon86%(51 flights)
  • Tue94%(50 flights)
  • Wed86%(51 flights)
  • Thu92%(52 flights)
  • Fri87%(52 flights)
  • Sat84%(51 flights)
  • Sun92%(51 flights)
On-time trend by month
87%
May

Jun 87% → May 87% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202587%30
July 202583%29
August 202581%31
September 202593%30
October 202594%31
November 202593%30
December 202587%30
January 2026100%27
February 202693%28
March 202677%31
April 202693%30
May 202687%31
Departures on time
90%
Diverted
0%
Flights flown
358
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.