Honolulu (HNL) to Seattle (SEA): On-Time Performance
Data through May 2026
Honolulu (HNL) to Seattle (SEA) effectively runs on two schedules. In September 2024, 88% of arrivals were on time; in July 2025 that fell to 69% — a 19-point seasonal swing. Across the full period the route averages 78% on-time against a national 78%.
- On-time
- 78%
- arrived <15 min late
- Avg delay
- 15 min
- completed flights
- Cancelled
- 0.9%
- Flights/day
- 8.1
- last 12 months
- Duration
- 5h 52m
- scheduled
- Distance
- 2,677 mi
Best airline from HNL to SEA
3 airlines flew this route regularly between 2024-06 and 2026-05.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Delta Air Linesmost reliable | 90% | 11 min | 1.1% | 1,594 |
| Alaska Airlines | 77% | 14 min | 0.9% | 2,979 |
| Hawaiian Airlines | 66% | 23 min | 0.6% | 1,397 |
Monthly on-time trend
Best time to fly from HNL to SEA
Aim for departures around 10 p.m. (93% on-time); avoid 2 p.m. departures (69%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 78% | 14 min |
| Tuesday | 79% | 13 min |
| Wednesdaybest | 80% | 13 min |
| Thursday | 77% | 17 min |
| Friday | 78% | 16 min |
| Saturday | 78% | 19 min |
| Sunday | 77% | 16 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft33%
- Airline operations56%
- National airspace system9%
- Weather2%
Frequently asked questions
- How often are flights from HNL to SEA delayed?
- 22% of HNL–SEA flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-06 and 2026-05. The average arrival delay across completed flights was 15 minutes.
- Which airline is most reliable from HNL to SEA?
- Delta Air Lines has the best on-time record on this route at 90%, based on 1,594 flights. 3 airlines flew HNL–SEA frequently enough to compare in this period.
- What is the best time of day to fly from HNL to SEA?
- Departures around 10 p.m. have the best record (93% on-time), while departures around 2 p.m. have the worst (69%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from HNL to SEA?
- The scheduled HNL–SEA flight time averages 5h 52m over 2,677 miles. Actual arrival times vary — flights on this route land 15+ minutes late 22% of the time.
- How often are HNL to SEA flights cancelled?
- 0.9% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, at or below the national rate of 1.6%.
- What is the worst month to fly from HNL to SEA?
- July 2025 was the roughest month in this dataset, with only 69% of arrivals on time. The best was September 2024 at 88%. If your dates are flexible, that 19-point gap is worth planning around.
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Based on 5,970 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.