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Flight Reliability

DL 3721 · Delta Air Lines

Salt Lake City → EUG (SLC–EUG)

100
Nerd Approved
WanderNerd Reliability Score
95%
Arrive within 15 minutes
6 min early
Average arrival delay
0%
Cancelled
11 min early
Median arrival delay

Based on 365 historical flights. Data through May 2026.

What the data says

Thursday is the weak spot.

DL 3721 arrived on time 100% of the time on Saturdays. On Thursdays: 89%.

Better than the Delta Air Lines network average.

DL 3721 arrived on time 95% 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.

Recent months have been rougher.

DL 3721 arrived on time 90% of the time over the last three months in the data, compared with 99% in the three months before that.

The breakdown

On-time by weekday
  • Mon98%(52 flights)
  • Tue94%(52 flights)
  • Wed98%(52 flights)
  • Thu89%(52 flights)
  • Fri94%(52 flights)
  • Sat100%(52 flights)
  • Sun94%(53 flights)
On-time by departure window
  • 3–6 PM—(1 flights)
  • 9 PM–12 AM95%(364 flights)
On-time trend by month
94%
May

Jun 97% → May 94% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202597%30
July 202594%31
August 202597%31
September 202597%30
October 2025100%31
November 202593%30
December 2025100%31
January 202697%31
February 2026100%28
March 202687%31
April 202690%30
May 202694%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.