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Flight Reliability

DL 4061 · Delta Air Lines

Oakland → Salt Lake City (OAK–SLC)98% of its flights flew this route. The rest (RNO–SLC) are included in these numbers.

100
Nerd Approved
WanderNerd Reliability Score
96%
Arrive within 15 minutes
9 min early
Average arrival delay
0%
Cancelled
13 min early
Median arrival delay

Based on 365 historical flights. Data through May 2026.

What the data says

Thursday is the weak spot.

DL 4061 arrived on time 100% of the time on Fridays. On Thursdays: 92%.

Better than the OAK–SLC route average.

DL 4061 arrived on time 96% of the time, versus 89% across the OAK–SLC route.

Well ahead of the Delta Air Lines network.

DL 4061 arrived on time 96% of the time, versus 81% across the Delta Air Lines network.

It basically never cancels.

Out of 365 scheduled flights, only 0.0% were cancelled.

The breakdown

On-time by weekday
  • Mon94%(52 flights)
  • Tue98%(52 flights)
  • Wed96%(52 flights)
  • Thu92%(52 flights)
  • Fri100%(52 flights)
  • Sat96%(52 flights)
  • Sun98%(53 flights)
On-time by departure window
  • 3–6 AM97%(213 flights)
  • 6–9 AM97%(145 flights)
  • 3–6 PM—(7 flights)
On-time trend by month
97%
May

Jun 90% → May 97% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202590%30
July 2025100%31
August 202590%31
September 2025100%30
October 2025100%31
November 202593%30
December 2025100%31
January 202697%31
February 202693%28
March 202697%31
April 2026100%30
May 202697%31
Departures on time
95%
Diverted
0%
Flights flown
365
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.