Skip to content
WanderNerd
Check a flight

Flight Reliability

DL 3797 · Delta Air Lines

Salt Lake City → Oakland (SLC–OAK)92% of its flights flew this route. The rest (MKE–MSP, MSP–MKE) are included in these numbers.

97
Nerd Approved
WanderNerd Reliability Score
92%
Arrive within 15 minutes
4 min early
Average arrival delay
0.5%
Cancelled
11 min early
Median arrival delay

Based on 370 historical flights. Data through May 2026.

What the data says

The late departure is the smart one here.

DL 3797 departing between 9 PM–12 AM arrived on time 94% of the time, versus 77% between 12–3 PM.

Skip Wednesday if you can.

DL 3797 arrived on time 96% of the time on Tuesdays. On Wednesdays: 86%.

Better than the Delta Air Lines network average.

DL 3797 arrived on time 92% of the time, versus 81% across the Delta Air Lines network.

Ticking up lately.

DL 3797 arrived on time 94% of the time over the last three months in the data, compared with 88% in the three months before that.

The breakdown

On-time by weekday
  • Mon94%(53 flights)
  • Tue96%(53 flights)
  • Wed86%(49 flights)
  • Thu94%(53 flights)
  • Fri94%(53 flights)
  • Sat89%(54 flights)
  • Sun92%(52 flights)
On-time by departure window
  • 12–3 PM77%(13 flights)
  • 3–6 PM79%(14 flights)
  • 6–9 PM90%(30 flights)
  • 9 PM–12 AM94%(310 flights)
On-time trend by month
97%
May

Jun 87% → May 97% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202587%23
July 202590%31
August 202597%31
September 2025100%30
October 202590%31
November 2025100%29
December 202587%37
January 202691%35
February 202686%28
March 202687%31
April 202697%30
May 202697%31
Departures on time
92%
Diverted
0.3%
Flights flown
367
Months covered
12

Same route, other flights

Keep nerding

Based on 370 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.