Best Time to Fly DEN to JAX: On-Time Stats by Hour & Airline
Denver International → Jacksonville International
Data through July 2026 · Last updated October 18, 2026
1,020 flights were scheduled from Denver (DEN) to Jacksonville (JAX) in the last 12 months, and 76.5% of those that flew arrived on time, 1.1 points below the US average of 77.6%.
Among 2 airlines, United Airlines led with 81.6% on time and Southwest Airlines was last with 68.1%.
Over 24 months, Friday was the most reliable day (75% on time) and August the worst month (56%).
The cancellation rate was 0.0% (US average 1.8%).
DEN to JAX 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 | 81.6% | 56 min | 0.0% | 638 |
| Southwest Airlines | 68.1% | 50 min | 0.0% | 382 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly DEN to JAX
On-time arrival % by scheduled departure hour (local time), 1,940 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 8am–9am | Limited data | 5 | |
| 9am–10am | 84.1% | 0.0% | 424 |
| 10am–11am | 80.6% | 0.0% | 144 |
| 11am–12pm | 74.0% | 0.0% | 50 |
| 12pm–1pm | 62.5% | 4.8% | 42 |
| 1pm–2pm | 70.2% | 0.6% | 179 |
| 2pm–3pm | 77.3% | 0.0% | 75 |
| 3pm–4pm | 68.5% | 0.0% | 125 |
| 4pm–5pm | 78.6% | 0.0% | 252 |
| 5pm–6pm | 66.3% | 0.4% | 521 |
| 6pm–7pm | 65.8% | 0.0% | 82 |
| 7pm–8pm | 56.1% | 0.0% | 41 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on DEN to JAX
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) | 87.8% | +11.3 pts | 0.0% | 41 |
| Christmas & New Year (Dec 20 - Jan 3) | 75.3% | -1.2 pts | 0.0% | 93 |
| Summer peak (Jun 15 - Aug 15) | 56.5% | -20.0 pts | 0.3% | 289 |
| All other days | 76.5% | — | 0.3% | 1,517 |
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).