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Flight Reliability

DL 2502 · Delta Air Lines

Salt Lake City → Houston (SLC–IAH)

96
Nerd Approved
WanderNerd Reliability Score
90%
Arrive within 15 minutes
4 min early
Average arrival delay
0.3%
Cancelled
11 min early
Median arrival delay

Based on 365 historical flights. Data through May 2026.

What the data says

Mornings have a slight edge.

Departures between 6–9 AM arrived on time 90% of the time, against 84% between 9 AM–12 PM.

Thursday is the weak spot.

DL 2502 arrived on time 94% of the time on Tuesdays. On Thursdays: 87%.

A bit ahead of the SLC–IAH route.

DL 2502 arrived on time 90% of the time, versus 85% across the SLC–IAH route.

Better than the Delta Air Lines network average.

DL 2502 arrived on time 90% of the time, versus 81% across the Delta Air Lines network.

The breakdown

On-time by weekday
  • Mon92%(52 flights)
  • Tue94%(52 flights)
  • Wed87%(52 flights)
  • Thu87%(52 flights)
  • Fri90%(52 flights)
  • Sat88%(51 flights)
  • Sun89%(53 flights)
On-time by departure window
  • 6–9 AM90%(326 flights)
  • 9 AM–12 PM84%(38 flights)
On-time trend by month
87%
May

Jun 90% → May 87% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202590%30
July 202577%31
August 202590%31
September 202597%30
October 202597%31
November 202587%30
December 202590%30
January 202694%31
February 202693%28
March 202684%31
April 202690%30
May 202687%31
Departures on time
92%
Diverted
0%
Flights flown
364
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.