Best Time to Fly JAX to DEN: On-Time Stats by Hour & Airline
Jacksonville International → Denver International
Data through July 2026 · Last updated October 18, 2026
1,020 flights were scheduled from Jacksonville (JAX) to Denver (DEN) in the last 12 months, and 82.2% of those that flew arrived on time, 4.5 points above the US average of 77.6%.
United Airlines was the most punctual of the 2 airlines on the route at 88.0%, while Southwest Airlines trailed at 72.4%.
August has been the best month (93% on time) and Sunday the weakest day of the week (81%).
0.3% of flights were cancelled, versus 1.8% nationally.
JAX to DEN 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 | 88.0% | 84 min | 0.3% | 638 |
| Southwest Airlines | 72.4% | 53 min | 0.3% | 382 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly JAX to DEN
On-time arrival % by scheduled departure hour (local time), 1,940 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 94.7% | 0.0% | 95 |
| 6am–7am | 100.0% | 0.0% | 34 |
| 7am–8am | 92.2% | 1.5% | 65 |
| 8am–9am | 90.6% | 0.7% | 774 |
| 9am–10am | Limited data | 11 | |
| 10am–11am | Limited data | 26 | |
| 11am–12pm | 93.2% | 0.0% | 74 |
| 12pm–1pm | Limited data | 8 | |
| 1pm–2pm | 80.3% | 0.8% | 118 |
| 2pm–3pm | 73.6% | 0.0% | 72 |
| 3pm–4pm | 67.6% | 1.3% | 75 |
| 4pm–5pm | 78.1% | 0.4% | 531 |
| 5pm–6pm | 45.5% | 0.0% | 55 |
| 6pm–7pm | Limited data | 2 | |
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 DEN
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) | 80.5% | -5.4 pts | 0.0% | 41 |
| Christmas & New Year (Dec 20 - Jan 3) | 86.0% | +0.1 pts | 0.0% | 93 |
| Summer peak (Jun 15 - Aug 15) | 77.1% | -8.8 pts | 1.0% | 289 |
| All other days | 85.9% | — | 0.5% | 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).