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Flight Reliability

DL 930 · Delta Air Lines

San Antonio → Salt Lake City (SAT–SLC)95% of its flights flew this route. The rest (SFO–ATL) are included in these numbers.

80
Pretty Reliable
WanderNerd Reliability Score
79%
Arrive within 15 minutes
5 min
Average arrival delay
1.4%
Cancelled
6 min early
Median arrival delay

Based on 352 historical flights. Data through May 2026.

What the data says

The 12–3 PM departure wins.

DL 930 departing between 12–3 PM arrived on time 80% of the time, versus 60% between 9 PM–12 AM.

Saturdays have been rough.

DL 930 arrived on time 90% of the time on Sundays and just 68% on Saturdays. That gap is worth planning around.

Lagging the SAT–SLC route.

DL 930 arrived on time 79% of the time, versus 87% across the SAT–SLC route.

Trending in the right direction.

DL 930 arrived on time 88% 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
  • Mon78%(51 flights)
  • Tue79%(52 flights)
  • Wed87%(52 flights)
  • Thu73%(52 flights)
  • Fri75%(52 flights)
  • Sat68%(38 flights)
  • Sun90%(49 flights)
On-time by departure window
  • 12–3 PM80%(331 flights)
  • 9 PM–12 AM60%(15 flights)
On-time trend by month
92%
May

Jun 76% → May 92% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202576%29
July 202581%31
August 202581%31
September 202569%29
October 202581%31
November 202583%30
December 202560%30
January 202674%31
February 202682%28
March 202689%27
April 202683%24
May 202692%25
Departures on time
79%
Diverted
0.3%
Flights flown
346
Months covered
12

Same route, other flights

Keep nerding

Based on 352 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.