Route on-time record
KOA to PDX: most on-time flights and the best time to fly
Kailua-Kona (Ellison Onizuka Kona International Airport at Keāhole) to Portland (Portland International Airport). 360 nonstop flights in Jun 2025 to May 2026, 74% arrived within 15 minutes and 0.0% were cancelled. The most reliable flight number was Alaska 253 at 1:19 PM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
KOA → PDX
Kailua-Kona to Portland: 360 nonstop flights a year
On time (12 months)
74%
Cancelled
0.0%
avg delay 14 min
Best time to leave
9 AM to noon
86% on time vs 67% noon to 3 PM
Most reliable airline
Alaska
74% chance on time
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Most reliable nonstop flights
Ranked by the chance the flight operates and arrives within 15 minutes of schedule, from Jun 2025 to May 2026 records.
#1 · Alaska 253
1:19 PM → 9:58 PM5h 39m nonstop
Local times, typical schedule. Last flown 2026-05-31.
80%
chance on time
- On time (history)
- 82%
- Cancelled
- 0.0%
- Avg arrival delay
- 11 min
- Arrived on time 82% of the time (215 flights, Jun 2025 to May 2026).
- Never cancelled in 215 scheduled flights.
- Leaves in this route's least on-time window (Noon to 3 PM: 67% on time; 9 AM to noon: 86%).
- 53% of its delay minutes came from the plane arriving late from an earlier flight.
Strong track record · 215 flights
Find Alaska 253 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- Alaska Airlines74%
360 flights · 74% on time as flown · 0.0% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- 9 AM to noon86%
104 flights · avg delay 10 min
- Noon to 3 PM67%
246 flights · avg delay 17 min
Best day: Wednesday (82%). Worst: Thursday (75%).
On time by month
All airlines, Jun 2023 to May 2026. Several years per month, so one stormy season doesn't define a month. Travel-month estimates use this seasonal pattern.
What delays this route
- Late-arriving aircraft61%
- Airline (crew, maintenance, boarding)19%
- Air traffic control and airport volume16%
- Severe weather2%
Share of delay minutes by the cause airlines report to the US DOT.
Historical odds, not a guarantee. Built from the US DOT Bureau of Transportation Statistics on-time reports (Jun 2025 to May 2026), FAA ground stop and delay program advisories, and 20 years of airport weather observations. Covers US airlines that report to the DOT; schedules are flights operated recently, so confirm times when you book. ATIS Alerts is not affiliated with any airline. Fares are what Aviasales travelers saw in recent searches (USD, one way, 1 adult), not live quotes; the partner site shows the current price. Fare links go to our travel partner and may earn us a commission at no cost to you. Affiliate disclosure
KOA to PDX questions
- What time of day is best to fly KOA to PDX?
- 9 AM to noon: 86% of flights arrived on time, against 67% for departures noon to 3 PM.
- Which airline is most on time from KOA to PDX?
- Alaska, with a season-adjusted 74% chance of operating and arriving on time over 360 flights. The adjustment compares each airline with what the route did in the months it flew, so a carrier that skipped a stormy month gets no free credit.
- What is the worst month for delays on KOA to PDX?
- July (69% on time); the best was February (87%), averaged over Jun 2023 to May 2026.
- Is this a prediction for my flight?
- No. These are historical odds from the US DOT on-time reports, FAA advisories and airport weather records. Check your flight status and the FAA delay board on the day you fly.
More routes from KOA
- PDX to KOA (return)
- KOA to HNL 85%
- KOA to LAX 86%
- KOA to OGG 87%
- KOA to SEA 86%
- KOA to SFO 83%
- KOA to SMF 90%
- KOA to PHX 93%
- KOA to DEN 91%
- KOA to LIH 93%
- KOA to LAS 95%
- KOA to SAN 71%
Live status: FAA delays and ground stops