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Flight Reliability

DL 4128 · Delta Air Lines

EUG → Seattle (EUG–SEA)

100
Nerd Approved
WanderNerd Reliability Score
94%
Arrive within 15 minutes
11 min early
Average arrival delay
0%
Cancelled
17 min early
Median arrival delay

Based on 365 historical flights. Data through May 2026.

What the data says

Saturday is the weak spot.

DL 4128 arrived on time 98% of the time on Mondays. On Saturdays: 90%.

Better than the EUG–SEA route average.

DL 4128 arrived on time 94% of the time, versus 87% across the EUG–SEA route.

Better than the Delta Air Lines network average.

DL 4128 arrived on time 94% 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
  • Mon98%(51 flights)
  • Tue94%(52 flights)
  • Wed96%(52 flights)
  • Thu92%(52 flights)
  • Fri94%(52 flights)
  • Sat90%(52 flights)
  • Sun91%(53 flights)
On-time trend by month
97%
May

Jun 97% → May 97% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202597%30
July 202590%31
August 2025100%31
September 2025100%30
October 202587%31
November 202587%30
December 2025100%31
January 202687%31
February 202693%28
March 202687%30
April 2026100%30
May 202697%31
Departures on time
95%
Diverted
0.3%
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.