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Flight Reliability

DL 3729 · Delta Air Lines

Salt Lake City → Albuquerque (SLC–ABQ)96% of its flights flew this route. The rest (RIC–DTW) are included in these numbers.

99
Nerd Approved
WanderNerd Reliability Score
92%
Arrive within 15 minutes
6 min early
Average arrival delay
0%
Cancelled
11 min early
Median arrival delay

Based on 364 historical flights. Data through May 2026.

What the data says

9 PM–12 AM has a slight edge.

Departures between 9 PM–12 AM arrived on time 96% of the time, against 90% between 6–9 PM.

Sunday comes out ahead.

A small edge: 94% on time on Sundays against 89% on Fridays.

Better than the Delta Air Lines network average.

DL 3729 arrived on time 92% of the time, versus 81% across the Delta Air Lines network.

It basically never cancels.

Out of 364 scheduled flights, only 0.0% were cancelled.

The breakdown

On-time by weekday
  • Mon90%(52 flights)
  • Tue94%(52 flights)
  • Wed92%(51 flights)
  • Thu94%(51 flights)
  • Fri89%(52 flights)
  • Sat90%(52 flights)
  • Sun94%(53 flights)
On-time by departure window
  • 6–9 AM94%(16 flights)
  • 3–6 PM—(5 flights)
  • 6–9 PM90%(237 flights)
  • 9 PM–12 AM96%(105 flights)
On-time trend by month
84%
May

Jun 93% → May 84% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202593%30
July 202597%31
August 202597%31
September 2025100%30
October 202597%31
November 202597%29
December 202590%31
January 202694%31
February 202693%27
March 202690%31
April 202673%30
May 202684%31
Departures on time
91%
Diverted
0.3%
Flights flown
363
Months covered
12

Same route, other flights

Keep nerding

Based on 364 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.