Best Time to Fly IAD to HNL: On-Time Stats by Hour & Airline
Washington Dulles International → Daniel K Inouye International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 75.6% of Washington (IAD) to Honolulu (HNL) flights arrived on time (168 scheduled flights). That is 2.0 points below the national average of 77.6%.
United Airlines was the only reporting airline with regular flights on this route.
March has been the best month (92% on time) and Wednesday the weakest day of the week (66%).
1.2% of flights were cancelled, versus 1.8% nationally.
IAD to HNL on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| United Airlines | 75.6% | 62 min | 1.2% | 168 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly IAD to HNL
On-time arrival % by scheduled departure hour (local time), 310 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 8am–9am | 78.9% | 1.0% | 303 |
| 9am–10am | Limited data | 7 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on IAD to HNL
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | Limited data | 2 | ||
| Christmas & New Year (Dec 20 - Jan 3) | 76.7% | -9.1 pts | 0.0% | 30 |
| Summer peak (Jun 15 - Aug 15) | 50.0% | -35.8 pts | 0.0% | 48 |
| All other days | 85.8% | — | 1.3% | 230 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).