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Flight Reliability

DL 485 · Delta Air Lines

Kailua-Kona → Seattle (KOA–SEA)96% of its flights flew this route. The rest (CLT–MSP, CLT–ATL) are included in these numbers.

90
Nerd Approved
WanderNerd Reliability Score
92%
Arrive within 15 minutes
12 min early
Average arrival delay
2.2%
Cancelled
17 min early
Median arrival delay

Based on 364 historical flights. Data through May 2026.

What the data says

9 PM–12 AM has a slight edge.

Departures between 9 PM–12 AM arrived on time 94% of the time, against 91% between 6–9 PM.

Saturday is the weak spot.

DL 485 arrived on time 96% of the time on Thursdays. On Saturdays: 86%.

A bit ahead of the KOA–SEA route.

DL 485 arrived on time 92% of the time, versus 87% across the KOA–SEA route.

Better than the Delta Air Lines network average.

DL 485 arrived on time 92% of the time, versus 81% across the Delta Air Lines network.

The breakdown

On-time by weekday
  • Mon92%(51 flights)
  • Tue96%(50 flights)
  • Wed89%(52 flights)
  • Thu96%(52 flights)
  • Fri96%(49 flights)
  • Sat86%(50 flights)
  • Sun92%(51 flights)
On-time by departure window
  • 3–6 PM—(3 flights)
  • 6–9 PM91%(166 flights)
  • 9 PM–12 AM94%(186 flights)
On-time trend by month
90%
May

Jun 86% → May 90% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202586%29
July 2025100%30
August 2025100%31
September 202593%30
October 2025100%31
November 202590%30
December 202579%28
January 202693%30
February 202693%28
March 202686%28
April 202697%29
May 202690%31
Departures on time
91%
Diverted
0.3%
Flights flown
355
Months covered
12

Same route, other flights

Keep nerding

Based on 364 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.