Skip to content
WanderNerd
Check a flight

Flight Reliability

DL 440 · Delta Air Lines

Honolulu → Seattle (HNL–SEA)

96
Nerd Approved
WanderNerd Reliability Score
94%
Arrive within 15 minutes
9 min early
Average arrival delay
1.6%
Cancelled
16 min early
Median arrival delay

Based on 365 historical flights. Data through May 2026.

What the data says

Skip Saturday if you can.

DL 440 arrived on time 98% of the time on Thursdays. On Saturdays: 88%.

Well ahead of the HNL–SEA route.

DL 440 arrived on time 94% of the time, versus 76% across the HNL–SEA route.

Better than the Delta Air Lines network average.

DL 440 arrived on time 94% of the time, versus 81% across the Delta Air Lines network.

Ticking up lately.

DL 440 arrived on time 93% of the time over the last three months in the data, compared with 90% in the three months before that.

The breakdown

On-time by weekday
  • Mon94%(52 flights)
  • Tue92%(49 flights)
  • Wed96%(52 flights)
  • Thu98%(52 flights)
  • Fri96%(51 flights)
  • Sat88%(50 flights)
  • Sun96%(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 2025100%28
August 202597%31
September 202597%30
October 202597%29
November 202597%30
December 202594%31
January 202690%31
February 202686%28
March 202690%30
April 202693%30
May 202697%31
Departures on time
95%
Diverted
0%
Flights flown
359
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.