Best Time to Fly JAX to IAD: On-Time Stats by Hour & Airline
Jacksonville International → Washington Dulles International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 88.6% of Jacksonville (JAX) to Washington (IAD) flights arrived on time (777 scheduled flights). That is 10.9 points above the national average of 77.6%.
Among 3 airlines, Republic Airways led with 96.6% on time and Allegiant Air was last with 54.1%.
Over 24 months, Tuesday was the most reliable day (93% on time) and July the worst month (75%).
The cancellation rate was 0.9% (US average 1.8%).
JAX to IAD 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 |
|---|---|---|---|---|
| Republic Airways | 96.6% | 176 min | 1.1% | 90 |
| United Airlines | 90.8% | 83 min | 1.0% | 626 |
| Allegiant Air | 54.1% | 49 min | 0.0% | 61 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly JAX to IAD
On-time arrival % by scheduled departure hour (local time), 1,501 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 9am–10am | 90.7% | 1.7% | 701 |
| 10am–11am | Limited data | 7 | |
| 11am–12pm | 87.7% | 1.2% | 82 |
| 12pm–1pm | 90.8% | 0.0% | 131 |
| 1pm–2pm | 89.7% | 0.5% | 185 |
| 2pm–3pm | 84.7% | 1.3% | 228 |
| 3pm–4pm | 63.3% | 0.0% | 30 |
| 4pm–5pm | 47.4% | 0.0% | 57 |
| 6pm–7pm | 78.6% | 2.3% | 43 |
| 7pm–8pm | 75.7% | 0.0% | 37 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on JAX to IAD
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) | 96.8% | +8.1 pts | 0.0% | 31 |
| Christmas & New Year (Dec 20 - Jan 3) | 87.2% | -1.5 pts | 0.0% | 39 |
| Summer peak (Jun 15 - Aug 15) | 76.1% | -12.6 pts | 2.8% | 286 |
| All other days | 88.7% | — | 0.9% | 1,145 |
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).